Saratoga, California (West Valley College Area)

Current Weather Conditions, Maps, and Forecasts

Friday November 28, 2025; 1:55AM

DISCLAIMER: This is a hobby page. As such, the reliability of this information is not guaranteed, or warranted 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 56 - MODERATE (Using 2024 US-EPA PM2.5 conversion) Air quality is acceptable; however, for some pollutants there may be a moderate health concern for a very small number of people who are unusually sensitive to air pollution. Active children and adults, and people with respiratory disease, such as asthma, should limit prolonged outdoor exertion.
Outside Temperature	45.3°F
Wind Chill	45.3°F
Heat Index	43.9°F
Dew Point	43.7°F
Humidity	94%
Barometer	30.146 inHg
Barometer Trend (3 hours)	0.009 inHg
Wind	0 mph
Rain Rate	0.00 in/h
Garage Temperature	57.2°F
UV Index	0.0
Radiation	0 W/m²
Using 2024 US-EPA PM2.5 conversion
Latest PM2.5 [AQI]	11.6 μg/m³ [56]

Since Midnight

High Temperature Low Temperature	45.3°F at 01:49:16 41.4°F at 00:00:16
High Heat Index Low Wind Chill	44.0°F at 01:49:16 41.4°F at 00:00:16
High Humidity Low Humidity	95% at 00:38:20 94% at 00:00:02
High Dewpoint Low Dewpoint	44.0°F at 01:49:16 39.8°F at 00:00:16
High Barometer Low Barometer	30.151 inHg at 01:42:04 30.131 inHg at 00:00:02
Today's Rain	0.00 in
High Rain Rate	0.00 in/h at 00:00:02
High Wind	1 mph from 331° (NNW) at 00:36:22
Average Wind	0 mph
RMS Wind	0 mph
Vector Average Speed Vector Average Direction	0 mph N/A
High Garage Temperature Low Garage Temperature	57.8°F at 00:00:02 57.2°F at 01:29:02
High UV Low UV	0.0 at 00:00:02 0.0 at 00:00:02
High Radiation Low Radiation	0 W/m² at 00:00:02 0 W/m² at 00:00:02

Rain Year (1-Oct start)

Rain Year Total

5.66 in

Local Radar Loop

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Regional Radar Loop

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Hazard Map (from the NWS)

Click map for more details

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

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
Fri, 28 Nov 2025 01:55:02 -0800 (PST)

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

Thursday
Night
Decreasing Clouds

Lo 46 °F
Precp 0%
Decreasing
Clouds

Friday
Mostly Sunny

Hi 66 °F
Precp 0%
Mostly
Sunny

Friday
Night
Mostly Cloudy

Lo 44 °F
Precp 0%
Mostly
Cloudy

Saturday
Partly Sunny

Hi 66 °F
Precp 0%
Partly
Sunny

Saturday
Night
Partly Cloudy

Lo 44 °F
Precp 0%
Partly
Cloudy

Sunday
Partly Sunny

Hi 66 °F
Precp 0%
Partly
Sunny

Sunday
Night
Partly Cloudy

Lo 44 °F
Precp 0%
Partly
Cloudy

Monday
Mostly Sunny

Hi 66 °F
Precp 0%
Mostly
Sunny

Thursday Night	Low of 46. Partly cloudy through the night. Humidity 80% in the evening, rising to 82% after midnight. Winds are a light air, W-NW at 2 mph, gusting to 3 mph.
Friday	High of 66. Mostly sunny through the day. Humidity 83% in the morning, lowering to 78% by the afternoon. Winds will be a light breeze, W-N at 2-5 mph, gusting to a gentle breeze, 3-10 mph.
Friday Night	Low of 44. Partly cloudy in the evening, with some increasing clouds, becoming mostly cloudy after midnight. Humidity 83% in the evening, rising to 93% after midnight. Winds will be a light air, W-N at 2 mph, gusting to a light breeze, 2-5 mph.
Saturday	High of 66. Partly cloudy in the morning, with clouds clearing, to become sunny by the afternoon. Humidity 89% in the morning, lowering to 64% by the afternoon. Winds will be a light air, NNW at 1-2 mph, gusting to a light breeze, 3-6 mph.
Saturday Night	Low of 44. Mostly clear in the evening, with incoming clouds making it partly cloudy after midnight. Humidity 77% in the evening, rising to 89% after midnight. Winds will be a light air, N at 1-2 mph, gusting to 2-3 mph.
Sunday	High of 66. Partly cloudy in the morning, with some clouds clearing, making it mostly sunny by the afternoon. Humidity 89% in the morning, lowering to 58% by the afternoon. Winds will be a light air, NNW-NNE at 1-3 mph, gusting to a gentle breeze, 3-9 mph. Winds stronger in the afternoon.
Sunday Night	Low of 44. Partly cloudy through the night. Humidity 65% in the evening, rising to 85% after midnight. Winds will be a light breeze, NNW-N at 2-5 mph, gusting to a gentle breeze, 6-8 mph. Sustained winds stronger in the evening.
Monday	High of 66. Partly cloudy in the morning, with some clouds clearing, making it mostly sunny by the afternoon. Humidity 83% in the morning, lowering to 69% by the afternoon. Winds will be a light air, NE at 2 mph, gusting to a light breeze, 5 mph.
Monday Night	Low of 46. Clear in the evening, with a few clouds later making it mostly clear after midnight. Humidity 61% in the evening, rising to 80% after midnight. Winds will be a light air, N-E at 2 mph, gusting to a light breeze, 5 mph.
Tuesday	High of 66. Mostly sunny through the day. Humidity 80% in the morning, lowering to 67% by the afternoon. Winds will be a light air, N-E at 2 mph, gusting to 3 mph.
Tuesday Night	Low of 44. Mostly clear in the evening, with incoming clouds making it partly cloudy after midnight. Chance of precipitation will be 1%. Humidity 62% in the evening, rising to 80% after midnight. Winds will be a light air, NW-NNW at 3 mph, gusting to a light breeze, 7 mph.
Wednesday	High of 64. Partly cloudy in the morning, with some clouds clearing, making it mostly sunny by the afternoon. Chance of precipitation will be 1%. Humidity 82% in the morning, lowering to 66% by the afternoon. Winds will be a light air, N at 2-3 mph, gusting to a gentle breeze, 7-9 mph.
Wednesday Night	Low of 42. Mostly clear through the night. Chance of precipitation will be 3%. Humidity 54% in the evening, rising to 69% after midnight. Winds will be a light breeze, N-NNE at 5 mph, gusting to a gentle breeze, 8-9 mph.
Thursday	High of 64. Mostly sunny through the day. Chance of precipitation will be 2%. Humidity 73% in the morning, lowering to 64% by the afternoon. Winds will be a light air, NNE at 2-3 mph, gusting to a light breeze, 6-7 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: 2 days, 21 hours, 34 minutes
Server uptime: 2 days, 21 hours, 34 minutes
weewx v5.2.0

Sun
Start civil twilight:	06:31:27
Sunrise:	07:00:23
Transit:	11:56:09
Sunset:	16:51:40
End civil twilight:	17:20:36
Prev. Day Length:	09:52:32
Curr. Day Length:	09:51:17
Curr. Shorter by:	00:01:15
Azimuth:	66.7°
Altitude:	-59.8°
Right ascension:	244.6°
Declination:	-21.4°
Solstice:	12/21/25 07:02:51
Equinox:	03/20/26 07:45:53

Moon
Rise:	12:56:41
Transit:	18:47:47
Set:	00:48:50
Duration Seen:	11:52
Azimuth:	277.7°
Altitude:	-25.8°
Right ascension:	339.1°
Declination:	-9.6°
Full moon:	12/04/25 15:14:00
New moon:	12/19/25 17:43:17
Phase:	First quarter (52% 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.