Saratoga, California (West Valley College Area)

Current Weather Conditions, Maps, and Forecasts

Wednesday December 24, 2025; 6:35PM

DISCLAIMER: This is a hobby page. As such, the reliability of this information is not guaranteed, or warrantied in any way, including, but not limited to, either for correctness or for fitness for any particular purpose. All risk for the use of this information is assumed by the readers and users of this page, including those who use the results extracted from either this page, or the scripts on which this page relies. Never base decisions that could affect life, property, livelihood, or anything else, on the information contained on this page, whether this information is locally derived or extracted from other locations on the Internet. In particular, the outputs and results shown for the air quality index (AQI) and the text forecasts are entirely the experimental work of an amateur hobbyist with no training in either weather forecasting or meterology. As such, these pages could very well contain or convey completely incorrect information (for example, the AQI reading is based on the last measurement of pollutants only, and is not an average over multiple hours!)

Current Conditions

Realtime Single-sample US-EPA Air Quality Index 0 - GOOD (Using 2024 US-EPA PM2.5 conversion) Air quality is considered satisfactory, and air pollution poses little or no risk.
Outside Temperature	57.3°F
Wind Chill	57.3°F
Heat Index	56.8°F
Dew Point	53.1°F
Humidity	86%
Barometer	29.617 inHg
Barometer Trend (3 hours)	-0.007 inHg
Wind	1 mph from 202° (SSW)
Rain Rate	0.00 in/h
Garage Temperature	63.4°F
UV Index	0.0
ET	0.00 in
Radiation	0 W/m²
Using 2024 US-EPA PM2.5 conversion
Latest PM2.5 [AQI]	0 μg/m³ [0]

Since Midnight

High Temperature Low Temperature	62.7°F at 13:08:03 53.6°F at 08:22:57
High Heat Index Low Wind Chill	62.1°F at 13:08:03 53.6°F at 08:22:57
High Humidity Low Humidity	93% at 02:10:00 71% at 13:12:37
High Dewpoint Low Dewpoint	58.6°F at 03:38:51 50.7°F at 08:22:57
High Barometer Low Barometer	29.713 inHg at 10:36:03 29.504 inHg at 02:45:02
Today's Rain	0.54 in
High Rain Rate	0.07 in/h at 04:12:55
High Wind	22 mph from 167° (SSE) at 18:15:21
Average Wind	1 mph
RMS Wind	2 mph
Vector Average Speed Vector Average Direction	1 mph 196°
High Garage Temperature Low Garage Temperature	63.6°F at 16:21:02 61.9°F at 10:15:01
High UV Low UV	1.2 at 11:43:27 0.0 at 00:00:04
High ET Low ET	0.01 in at 13:00:00 0.00 in at 00:05:00
High Radiation Low Radiation	545 W/m² at 11:44:09 0 W/m² at 00:00:04

Rain Year (1-Oct start)

Rain Year Total

6.44 in

Local Radar Loop

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Regional Radar Loop

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Hazard Map (from the NWS)

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Current Weather Outlook

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Low Temperature Outlook

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High Temperature Outlook

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Santa Clara County Reservoirs

ALERT Reservoir Data

California Major Reservoirs

Major Reservoir Levels

PG&E Electrical Outage Map

California Rainfall Totals

NOAA/NWS CA/NV Rainfall totals

California Snowpack Levels

California Snowpack Information

CAL FIRE Incidents

CAL Fire Active Incidents

Weather Networks We Are On

Active Advisory and Watch

Continued moderate wind advisory WIND ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 10 AM PST THURSDAY
To show the detailed information about this alert, click anywhere in this alert box

Continued severe flood watch FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING
To show the detailed information about this alert, click anywhere in this alert box

National Weather Service alerts map for your zone/county. The color key table only shows the keys for alerts that are active in your specified county or zone and only shows one alert for each spot on the map, even when more than one alert may be active at that spot. According to the NWS, when there are multiple alerts for a single spot, 'only the most significant threat to life or property is displayed on the map.'







				Wind Advisory
				Flood Watch

You may also obtain far more information about these weather alerts by clicking on this link to
the National Weather Service Forecast Office's report for your forecast region.

(Alerts are from the National Weather Service's CAP v1.2 JSON Feed)

Weather Forecast

Forecast Created by Experimental Software Written By an Amateur With No Guarantee or Warranty or Promise of Accuracy Provided or Implied! Use at Your Own Risk! You Assume All Risk and Liability If You Use This Information in Any Way, For Any Purpose Whatsoever! See the Disclaimer Given Above!

raw forecast data generated on
Wed, 24 Dec 2025 17:45:02 -0800 (PST)

Click here for an official National Weather Service forecast! NWS Disclaimer

Wednesday
Night
Moderate rain showers certain, with a slight chance of heavy thunderstorms

Lo 50 °F
Precp 93%
Rain
Showers

Christmas
Day
Moderate rain showers certain, with a slight chance of heavy thunderstorms

Hi 57 °F
Precp 89%
Rain
Showers

Thursday
Night
Moderate rain showers certain, with a slight chance of heavy thunderstorms

Lo 46 °F
Precp 94%
Rain
Showers

Friday
Light rain showers certain

Hi 57 °F
Precp 82%
Rain
Showers

Friday
Night
A chance of light rain showers

Lo 42 °F
Precp 59%
Chance
Rain
Showers

Saturday
A slight chance of light rain showers

Hi 57 °F
Precp 21%
Slight
Chance
Rain
Showers

Saturday
Night
Mostly Clear

Lo 37 °F
Precp 4%
Mostly
Clear

Sunday
Mostly Sunny

Hi 57 °F
Precp 0%
Mostly
Sunny

Wednesday Night	Moderate rain showers certain, with a slight chance of heavy thunderstorms, with a low of 50. Mostly cloudy in the evening, with full overcast conditions arriving, becoming cloudy after midnight. Expecting approximately 0.93 inches of rain, mostly after midnight. Chance of precipitation is 93%. Humidity 90% in the evening, rising to 100% after midnight. Winds are a strong breeze (small-craft advisory!), SSE-S at 17-28 mph, gusting to a storm-level gale (storm warning!), 37-61 mph.
Christmas Day	Moderate rain showers certain, with a slight chance of heavy thunderstorms, with a high of 57. Cloudy through the day. Expecting approximately 0.63 inches of rain, mostly in the morning. Chance of precipitation will be 89%. Humidity 93% in the morning, lowering to 87% by the afternoon. Winds will be a fresh breeze, S-SSW at 17-21 mph, gusting to a gale-force wind (gale warning!), 33-41 mph.
Thursday Night	Moderate rain showers certain, with a slight chance of heavy thunderstorms, with a low of 46. Cloudy in the evening, with a bit of the cloudiness clearing, becoming mostly cloudy after midnight. Expecting approximately 0.63 inches of rain, mostly in the evening. Chance of precipitation will be 94%. Humidity 93% in the evening, lowering to 90% after midnight. Winds will be a fresh breeze, S-SSW at 10-21 mph, gusting to a gale-force wind (gale warning!), 21-40 mph. Sustained winds stronger in the evening.
Friday	Light rain showers certain, with a high of 57. Mostly cloudy through the day. Expecting approximately 0.18 inches of rain. Chance of precipitation will be 82%. Humidity 92% in the morning, lowering to 86% by the afternoon. Winds will be a gentle breeze, S at 6-10 mph, gusting to a fresh breeze, 12-22 mph.
Friday Night	A chance of light rain showers, with a low of 42. Mostly cloudy in the evening, with a bit of the overcast clearing, becoming partly cloudy after midnight. Expecting approximately 0.05 inches of rain. Chance of precipitation will be 59%. Humidity 97% in the evening, lowering to 93% after midnight. Winds will be a light breeze, ESE-S at 2-5 mph, gusting to a gentle breeze, 7-9 mph. Sustained winds stronger in the evening.
Saturday	A slight chance of light rain showers, with a high of 57. Partly cloudy through the day. Chance of precipitation will be 21%. Humidity 100% in the morning, lowering to 77% by the afternoon. Winds will be a light breeze, NNW at 2-6 mph, gusting to a gentle breeze, 7-12 mph. Sustained winds stronger in the afternoon.
Saturday Night	Low of 37. Mostly clear in the evening, with any clouds clearing to become clear after midnight. Chance of precipitation will be 4%. Humidity 74% in the evening, rising to 92% after midnight. Winds will be a light breeze, NNW-N at 3-6 mph, gusting to a gentle breeze, 7-9 mph.
Sunday	High of 57. Mostly sunny through the day. Humidity 93% in the morning, lowering to 79% by the afternoon. Winds will be a light air, NNE at 3 mph, gusting to a light breeze, 6-7 mph.
Sunday Night	Areas of frost, with a low of 37. Clear through the night. Chance of precipitation will be 1%. Humidity 64% in the evening, rising to 86% after midnight. Winds will be a light breeze, N-NE at 3-6 mph, gusting to a gentle breeze, 6-8 mph.
Monday	High of 60. Mostly sunny through the day. Humidity 85% in the morning, lowering to 83% by the afternoon. Winds will be a light air, NE at 3 mph, gusting to a light breeze, 6-7 mph.
Monday Night	Low of 39. Clear in the evening, with a few clouds later making it mostly clear after midnight. Chance of precipitation will be 3%. Humidity 64% in the evening, rising to 83% after midnight. Winds will be a light breeze, N-NE at 2-5 mph, gusting to a gentle breeze, 5-8 mph. Sustained winds stronger after midnight.
Tuesday	High of 62. Mostly sunny through the day. Chance of precipitation will be 5%. Humidity 76% in the morning, lowering to 73% by the afternoon. Winds will be a light air, NE at 3 mph, gusting to a light breeze, 6-7 mph.
Tuesday Night	Low of 44. Mostly clear through the night. Chance of precipitation will be 12%. Humidity 62% in the evening, rising to 76% after midnight. Winds will be a light air, N-ENE at 2-3 mph, gusting to a light breeze, 5-6 mph.
Wednesday	High of 64. Mostly sunny in the morning, with incoming clouds making it partly cloudy by the afternoon. Chance of precipitation will be 18%. Humidity 76% in the morning, lowering to 74% by the afternoon. Winds will be a light air, ENE at 2 mph, gusting to a light breeze, 6 mph.

The above Experimental Forecast used the National Weather Service's NDFD XML Feed
for Saratoga, CA
(37.263°N, 122.003°W, NWS Zone CAZ513, NWS County CAC085)

Location
Latitude:	37° 15.75' N
Longitude:	122° 00.20' W
Altitude:	376 feet

This station uses a Vantage Pro2, controlled by 'WeeWX', an experimental weather software system written in Python. Weewx was designed to be simple, fast, and easy to understand by leveraging modern software concepts.

RSS feed

Smartphone formatted

WeeWX uptime: 0 days, 16 hours, 15 minutes
Server uptime: 0 days, 16 hours, 15 minutes
weewx v5.2.0

Sun
Start civil twilight:	06:49:51
Sunrise:	07:19:31
Transit:	12:07:51
Sunset:	16:56:14
End civil twilight:	17:25:53
Prev. Day Length:	09:36:33
Curr. Day Length:	09:36:43
Curr. Longer by:	00:00:10
Azimuth:	254.6°
Altitude:	-19.0°
Right ascension:	273.9°
Declination:	-23.4°
Equinox:	03/20/26 07:45:53
Solstice:	06/21/26 01:24:31

Moon
Rise:	10:34:19
Transit:	16:00:29
Set:	21:35:04
Duration Seen:	11:01
Azimuth:	223.1°
Altitude:	28.6°
Right ascension:	332.7°
Declination:	-12.7°
Full moon:	01/03/26 02:02:50
New moon:	01/18/26 11:51:54
Phase:	Waxing crescent (23% full)

Monthly summary:
Yearly summary:

This system is powered by the open source WeeWX package, authored by Tom Keffer.

This system uses the open source Purple Air extensions to WeeWX package by Kenneth Baker to obtain the raw air pollutant values.

Thanks to JaneAndJohn.org for PHP-based RSS weather-feed code used in a prior iteration of this site.

Thanks to Ken True at Saratoga-Weather.org for pointers to good warning scripts, used in a prior iteration, and for being a great overall resource for scripting weather websites. Also, the idea to ignore certificate errors from the NOAA/NWS website comes from these scripts.

Thanks to Ken True at Saratoga-Weather.org and Mike Chaliss for their alerts script from which we leverage the array mapping alert event name to alert event background color, and a clever way to handle events that aren't in that mapping.

Thanks to Tom at carterlake.org for a script that caused me to want to learn how to obtain the raw data of a National Weather Service forecast, that triggered my building my own set of scripts. He has also created another great overall resource for scripting weather websites.

The raw data on which the forecasts are built, and the icons for these, come from the National Weather Service.

This system utilizes the xmlize utility written by Hans Anderson.

The URL used to get the alerts, and the idea to use cURL to get them (and any other needed JSON/XML data), comes from the "NWS Alerts" PHP package by Rick "Curly" at the WXForum web site.

The idea to use and how to properly invoke the xmlize library to extract information from the NWS comes from PXWeather by Jonathan M. Abbett.

The algorithms used to either adjust the Purpleair sensor PM2.5 pollutant concentrations or to convert from PM2.5 pollutant concentrations to an AQI value come from multiple sources.

If you want a copy of the current code that produces this generated-forecast information, and performs AQI calculations, as well as more open source license information for this package and the ones that it uses or has learned from, click here.

If you want to see the clumsy way I integrate WeeWX and PHP, click here.

Severity Moderate	Urgency Expected	Certainty Likely
Alert Effective Wed, 24 Dec 4:55 pm (PST)	Event Onset Wed, 24 Dec 8:00 pm (PST)	Alert Updated by NWS On Wed, 24 Dec 4:55 pm (PST)
Alert Expires Thu, 25 Dec 1:00 am (PST)	Event Ends Thu, 25 Dec 10:00 am (PST)
Description
* WHAT...South winds 20 to 30 mph with gusts up to 55 mph expected. * WHERE...The East Bay and San Francisco Bay Shoreline, The Santa Clara Valley and Eastern Hills, The Marin Hills, The Santa Cruz Mountains, Most of San Benito County and the Cholame Hills in Southeast Monterey County, North Bay Interior Mountains, North Bay Interior Valleys, and Southern Salinas Valley/Arroyo Seco and Lake San Antonio. * WHEN...From 8 PM this evening to 10 AM PST Thursday. * IMPACTS...Gusty winds will blow around unsecured objects. Tree limbs could be blown down and a few power outages may result. Strong winds may move loose debris, result in minor damage property, and cause sporadic power outages. Travel could become difficult, especially for high profile vehicles. The combination of wind and moist soils will increase the risk for downed trees.
*According to the National Weather Service, your response to this alert should be to execute a pre-planned activity identified in this instruction.*
Instruction
Winds this strong can make driving difficult, especially for high profile vehicles. Use extra caution.

Severity Severe	Urgency Future	Certainty Possible
Alert Effective Wed, 24 Dec 2:48 pm (PST)	Event Onset Wed, 24 Dec 2:48 pm (PST)	Alert Updated by NWS On Wed, 24 Dec 2:48 pm (PST)
Alert Expires Wed, 24 Dec 11:00 pm (PST)	Event Ends Fri, 26 Dec 10:00 pm (PST)
Description
* WHAT...Flooding caused by excessive rainfall continues to be possible from multiple lines of showers and thunderstorms, strong at times, moving across the area. * WHERE...San Francisco County, San Mateo Peninsula, East Bay, South Bay, and Central Coast * WHEN...Through Friday evening. * IMPACTS...Excessive runoff may result in flooding of rivers, creeks, streams, and other low-lying and flood-prone locations. Creeks and streams may rise out of their banks. Low water crossings may become flooded. Flooding may occur in poor drainage and urban areas. * ADDITIONAL DETAILS... - Numerous lines of showers and thunderstorms will move across the Bay Area and Central Coast through Friday evening. An additional 1-2" of rain is expected across the interior with locally higher totals between 2-3" across the Santa Cruz Mountains and up to 3" across the Santa Lucia Range. Flooding potential will increase with each successive round of rain. Sharp rises in smaller creeks and streams are expected with at least some potential for minor flooding in mainstream rivers. - http://www.weather.gov/safety/flood
*According to the National Weather Service, your response to this alert should be to make preparations per this instruction.*
Instruction
You should monitor later forecasts and be alert for possible Flood Warnings. Those living in areas prone to flooding should be prepared to take action should flooding develop.

Saratoga, California (West Valley College Area)

Current Weather Conditions, Maps, and Forecasts

Wednesday December 24, 2025; 6:35PM

Active Advisory and Watch

WIND ADVISORY REMAINS IN EFFECT FROM 8 PM THIS EVENING TO 10 AM PST THURSDAY

FLOOD WATCH REMAINS IN EFFECT THROUGH FRIDAY EVENING

You may also obtain far more information about these weather alerts by clicking on this link to the National Weather Service Forecast Office's report for your forecast region.

(Alerts are from the National Weather Service's CAP v1.2 JSON Feed)

Weather Forecast

You may also obtain far more information about these weather alerts by clicking on this link to
the National Weather Service Forecast Office's report for your forecast region.