Saratoga, California (West Valley College Area)

Current Weather Conditions, Maps, and Forecasts

Thursday December 18, 2025; 11:15AM

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
4 - GOOD

(Using 2024 US-EPA PM2.5 conversion)
Air quality is considered satisfactory, and air pollution poses little or no risk.
Outside Temperature 55.5°F
Wind Chill 55.5°F
Heat Index 54.8°F
Dew Point 51.7°F
Humidity 87%
Barometer 30.186 inHg
Barometer Trend (3 hours) 0.003 inHg
Wind 0 mph
Rain Rate 0.00 in/h
Garage Temperature 57.5°F
UV Index 1.2
ET 0.00 in
Radiation 431 W/m²
Using 2024 US-EPA PM2.5 conversion
Latest PM2.5 [AQI]0.7 μg/m³ [4]

 

Since Midnight
High Temperature
Low Temperature
55.5°F at 11:06:41
42.9°F at 07:43:15
High Heat Index
Low Wind Chill
54.9°F at 11:06:41
42.9°F at 07:43:15
High Humidity
Low Humidity
95% at 09:06:43
86% at 00:00:04
High Dewpoint
Low Dewpoint
52.0°F at 10:57:29
40.7°F at 07:43:15
High Barometer
Low Barometer
30.202 inHg at 09:56:03
30.134 inHg at 04:59:02
Today's Rain 0.00 in
High Rain Rate 0.00 in/h at 00:00:04
High Wind 0 mph
Average Wind 0 mph
RMS Wind 0 mph
Vector Average Speed
Vector Average Direction
0 mph
N/A
High Garage Temperature
Low Garage Temperature
61.6°F at 00:00:04
56.7°F at 09:03:01
High UV
Low UV
1.2 at 11:08:31
0.0 at 00:00:04
High ET
Low ET
0.01 in at 11:00:00
0.00 in at 00:05:00
High Radiation
Low Radiation
445 W/m² at 10:59:49
0 W/m² at 00:00:04

 

Rain Year (1-Oct start)
Rain Year Total 5.76 in

 

Local Radar Loop
Local Radar

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Regional Radar Loop
Regional Radar

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Hazard Map (from the NWS)
Regional Hazard Map

Click map for more details

 

Current Weather Outlook
Current Weather Outlook

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High Temperature Outlook
High Temperature Outlook

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Low Temperature Outlook
Low Temperature Outlook

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Santa Clara County Reservoirs
ALERT Reservoir Data

 

California Major Reservoirs
Major Reservoir Levels

 

PG&E Electrical Outage Map
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
AWEKAS CWOP MesoWest
Met Office (UK) Ambient Weather PWS Weather (HamWeather)
Southwestern Weather Network Weather Underground Weather Cloud
WindAlert (Weatherflow) PurpleAir

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
Thu, 18 Dec 2025 11:10:01 -0800 (PST)

Click here for an official National Weather Service forecast! NWS Disclaimer
 
 
Thursday
Decreasing Clouds
Hi 64 °F
 Precp 1% 
Decreasing
Clouds

Thursday
Night
Areas of fog
Lo 48 °F
 Precp 11% 
Areas
Fog

 
Friday
Light rain certain
Hi 64 °F
 Precp 45% 
Rain
Friday
Night
Light rain certain
Lo 53 °F
 Precp 82% 
Rain
 
Saturday
Light rain certain
Hi 64 °F
 Precp 55% 
Rain
Saturday
Night
Light rain certain
Lo 55 °F
 Precp 83% 
Rain
 
Sunday
Moderate rain certain
Hi 60 °F
 Precp 90% 
Rain
Sunday
Night
Moderate rain certain
Lo 53 °F
 Precp 88% 
Rain

Thursday
 
High of 64. Partly cloudy in the morning, with some clouds clearing, making it mostly sunny by the afternoon. Chance of precipitation is 1%. Humidity 80% in the morning, lowering to 75% by the afternoon. Winds are a light air, NNW-N at 2-3 mph, gusting to a light breeze, 3-7 mph.
Thursday Night
 
Areas of fog, with a low of 48. Partly cloudy in the evening, with some increasing clouds, becoming mostly cloudy after midnight. Chance of precipitation will be 11%. Humidity 80% in the evening, rising to 100% after midnight. Winds will be a light air, SSE-WNW at 1-2 mph, gusting to 2-3 mph. Sustained winds stronger after midnight.
Friday
 
Light rain certain, with a high of 64. Mostly cloudy through the day. Expecting approximately 0.02 inches of rain. Chance of precipitation will be 45%. Humidity 100% in the morning, lowering to 86% by the afternoon. Winds will be a light breeze, SSE-SSW at 2-6 mph, gusting to a gentle breeze, 5-12 mph. Winds stronger in the afternoon.
Friday Night
 
Light rain certain, with a low of 53. Mostly cloudy in the evening, with full overcast conditions arriving, becoming cloudy after midnight. Expecting approximately 0.06 inches of rain, mostly in the evening. Chance of precipitation will be 82%. Humidity 89% in the evening, rising to 100% after midnight. Winds will be a light breeze, SSE-S at 2-6 mph, gusting to a gentle breeze, 5-10 mph. Winds weaker in the evening.
Saturday
 
Light rain certain, with a high of 64. Cloudy in the morning, with a bit of the cloudiness clearing, becoming mostly cloudy by the afternoon. Expecting approximately 0.07 inches of rain, mostly in the afternoon. Chance of precipitation will be 55%. Humidity 100% in the morning, lowering to 93% by the afternoon. Winds will be a light air, SSE-S at 2-3 mph, gusting to a light breeze, 5-7 mph.
Saturday Night
 
Light rain certain, with a low of 55. Mostly cloudy in the evening, with full overcast conditions arriving, becoming cloudy after midnight. Expecting approximately 0.2 inches of rain. Chance of precipitation will be 83%. Humidity 90% in the evening, rising to 100% after midnight. Winds will be a light breeze, S at 3-6 mph, gusting to a moderate breeze, 6-13 mph. Gusting winds stronger after midnight.
Sunday
 
Moderate rain certain, with a high of 60. Cloudy through the day. Chance of precipitation will be 90%. Humidity 100% through the day. Winds will be a gentle breeze, S at 7-12 mph, gusting to a fresh breeze, 15-22 mph.
Sunday Night
 
Moderate rain certain, with a low of 53. Mostly cloudy in the evening, with full overcast conditions arriving, becoming cloudy after midnight. Chance of precipitation will be 88%. Humidity 96% in the evening, rising to 100% after midnight. Winds will be a gentle breeze, S at 10-12 mph, gusting to a fresh breeze, 21-23 mph.
Monday
 
Moderate rain likely, with a high of 59. Cloudy through the day. Chance of precipitation will be 74%. Humidity 100% through the day. Winds will be a gentle breeze, S at 7-8 mph, gusting to a moderate breeze, 16-17 mph.
Monday Night
 
Moderate rain likely, with a low of 48. Mostly cloudy in the evening, with full overcast conditions arriving, becoming cloudy after midnight. Chance of precipitation will be 70%. Humidity 90% in the evening, rising to 96% after midnight. Winds will be a light breeze, SE-W at 6 mph, gusting to a moderate breeze, 12-14 mph.
Tuesday
 
Moderate rain certain, with a high of 59. Cloudy through the day. Chance of precipitation will be 68%. Humidity 97% in the morning, rising to 100% by the afternoon. Winds will be a light breeze, SSE at 5-7 mph, gusting to a moderate breeze, 10-15 mph.
Tuesday Night
 
Moderate rain certain, with a low of 48. Mostly cloudy through the night. Chance of precipitation will be 76%. Humidity 87% in the evening, rising to 97% after midnight. Winds will be a gentle breeze, SSE-S at 7-9 mph, gusting to a moderate breeze, 14-18 mph.
Wednesday
 
Moderate rain likely, with a high of 57. Mostly cloudy through the day. Chance of precipitation will be 69%. Humidity 100% through the day. Winds will be a gentle breeze, SSE-S at 7-9 mph, gusting to a moderate breeze, 15-17 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)



About this weather station:
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: 1 day, 8 hours, 58 minutes
Server uptime: 1 day, 8 hours, 58 minutes
weewx v5.2.0

Today's Almanac
Sun
Start civil twilight: 06:46:51
Sunrise: 07:16:27
Transit: 12:04:52
Sunset: 16:53:15
End civil twilight: 17:22:51
Prev. Day Length:09:37:00
Curr. Day Length:09:36:48
Curr. Shorter by:00:00:12
Azimuth: 167.0°
Altitude: 28.2°
Right ascension: 266.9°
Declination: -23.4°
Solstice: 12/21/25 07:02:51
Equinox: 03/20/26 07:45:53
Moon
Rise: 06:23:11
Transit: 11:01:14
Set: 15:36:46
Duration Seen:09:14
Azimuth: 183.3°
Altitude: 24.5°
Right ascension: 251.0°
Declination: -28.2°
New moon: 12/19/25 17:43:17
Full moon: 01/03/26 02:02:50
Phase: New
(2% full)
temperatures heatchill outside humidity rain wind barometer Hi Wind PM 2.5 Concentration Garage Wind Vector Radiation UV Index day rx percent