Saratoga, California (West Valley College Area)

Current Weather Conditions, Maps, and Forecasts

Sunday December 14, 2025; 9:35PM

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 43 - GOOD (Using 2024 US-EPA PM2.5 conversion) Air quality is considered satisfactory, and air pollution poses little or no risk.
Outside Temperature	41.3°F
Wind Chill	41.3°F
Heat Index	39.5°F
Dew Point	39.2°F
Humidity	92%
Barometer	30.189 inHg
Barometer Trend (3 hours)	0.005 inHg
Wind	0 mph
Rain Rate	0.00 in/h
Garage Temperature	55.4°F
UV Index	0.0
ET	0.00 in
Radiation	0 W/m²
Using 2024 US-EPA PM2.5 conversion
Latest PM2.5 [AQI]	7.8 μg/m³ [43]

Since Midnight

High Temperature Low Temperature	50.4°F at 16:00:41 38.7°F at 05:42:36
High Heat Index Low Wind Chill	49.5°F at 16:00:41 38.7°F at 05:42:36
High Humidity Low Humidity	97% at 07:40:46 92% at 16:04:43
High Dewpoint Low Dewpoint	48.5°F at 16:00:41 37.7°F at 05:42:36
High Barometer Low Barometer	30.215 inHg at 10:00:02 30.118 inHg at 05:19:02
Today's Rain	0.01 in
High Rain Rate	0.00 in/h at 00:00:04
High Wind	2 mph from 313° (NW) at 12:01:53
Average Wind	0 mph
RMS Wind	0 mph
Vector Average Speed Vector Average Direction	0 mph N/A
High Garage Temperature Low Garage Temperature	56.3°F at 17:27:01 53.5°F at 08:14:00
High UV Low UV	0.5 at 11:18:14 0.0 at 00:00:04
High ET Low ET	0.00 in at 12:00:00 0.00 in at 00:05:00
High Radiation Low Radiation	153 W/m² at 11:44:32 0 W/m² at 00:00:04

Rain Year (1-Oct start)

Rain Year Total

5.74 in

Local Radar Loop

Click image for a larger image

Regional Radar Loop

Click image for a larger image

Hazard Map (from the NWS)

Click map for more details

Current Weather Outlook

Click map for a larger image

Low Temperature Outlook

Click map for a larger image

High Temperature Outlook

Click map for a larger image

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
Sun, 14 Dec 2025 20:50:02 -0800 (PST)

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

Sunday
Night
Patchy fog

Lo 44 °F
Precp 1%
Patchy
Fog

Monday
Partly Sunny

Hi 62 °F
Precp 2%
Partly
Sunny

Monday
Night
Areas of fog

Lo 50 °F
Precp 4%
Areas
Fog

Tuesday
Mostly Cloudy

Hi 68 °F
Precp 6%
Mostly
Cloudy

Tuesday
Night
A chance of light rain, with areas of fog

Lo 55 °F
Precp 39%
Chance
Rain

Wednesday
A slight chance of light rain, with patchy fog

Hi 66 °F
Precp 48%
Slight
Chance
Rain

Wednesday
Night
Areas of fog

Lo 48 °F
Precp 11%
Areas
Fog

Thursday
Mostly Cloudy

Hi 66 °F
Precp 15%
Mostly
Cloudy

Sunday Night	Patchy fog, with a low of 44. Partly cloudy through the night. Chance of precipitation is 1%. Humidity 86% in the evening, rising to 89% after midnight. Winds are a light air, N at 1-2 mph, gusting to a light breeze, 2-5 mph.
Monday	High of 62. Partly cloudy in the morning, with some clouds clearing, making it mostly sunny by the afternoon. Chance of precipitation will be 2%. Humidity 89% in the morning, lowering to 64% by the afternoon. Winds will be a light breeze, WNW-N at 2-6 mph, gusting to a gentle breeze, 3-10 mph.
Monday Night	Areas of fog, with a low of 50. Mostly clear in the evening, with overcast conditions arriving, becoming mostly cloudy after midnight. Chance of precipitation will be 4%. Humidity 71% in the evening, rising to 100% after midnight. Winds will be a light air, N-ENE at 2-3 mph, gusting to a gentle breeze, 7-9 mph.
Tuesday	High of 68. Mostly cloudy in the morning, with a bit of the overcast clearing, becoming partly cloudy by the afternoon. Chance of precipitation will be 6%. Humidity 100% in the morning, lowering to 90% by the afternoon. Winds will be a light breeze, WNW-NNW at 2-7 mph, gusting to a gentle breeze, 7-12 mph.
Tuesday Night	A chance of light rain, with areas of fog, with a low of 55. Mostly cloudy through the night. Expecting approximately 0.01 inches of rain. Chance of precipitation will be 39%. Humidity 100% through the night. Winds will be a light air, W-N at 2 mph, gusting to a light breeze, 3-6 mph.
Wednesday	A slight chance of light rain, with patchy fog, with a high of 66. Mostly cloudy in the morning, with a bit of the overcast clearing, becoming partly cloudy by the afternoon. Expecting approximately 0.02 inches of rain, mostly in the morning. Chance of precipitation will be 48%. Humidity 100% in the morning, lowering to 90% by the afternoon. Winds will be a light breeze, W-N at 2-5 mph, gusting to a gentle breeze, 7-9 mph. Sustained winds stronger in the afternoon.
Wednesday Night	Areas of fog, with a low of 48. Partly cloudy through the night. Chance of precipitation will be 11%. Humidity 84% in the evening, rising to 97% after midnight. Winds will be a light breeze, NNW-N at 2-5 mph, gusting to a gentle breeze, 5-9 mph. Winds weaker in the evening.
Thursday	High of 66. Partly cloudy in the morning, with some increasing clouds, becoming mostly cloudy by the afternoon. Chance of precipitation will be 15%. Humidity 97% in the morning, lowering to 89% by the afternoon. Winds will be a light air, NNW at 1-2 mph, gusting to a light breeze, 3-5 mph. Sustained winds stronger in the afternoon.
Thursday Night	A chance of light rain, with patchy fog, with a low of 50. Partly cloudy in the evening, with some increasing clouds, becoming mostly cloudy after midnight. Chance of precipitation will be 26%. Humidity 75% in the evening, rising to 90% after midnight. Winds will be a light air, W-NW at 2-3 mph, gusting to a light breeze, 5-7 mph.
Friday	Light rain likely, with a high of 64. Mostly cloudy through the day. Chance of precipitation will be 47%. Humidity 96% in the morning, rising to 100% by the afternoon. Winds will be a light air, S at 2-3 mph, gusting to a gentle breeze, 5-9 mph. Gusting winds stronger in the afternoon.
Friday Night	Light rain likely, with a low of 51. Mostly cloudy through the night. Chance of precipitation will be 70%. Humidity 84% in the evening, rising to 93% after midnight. Winds will be a light breeze, S-SSW at 6 mph, gusting to a gentle breeze, 9-10 mph.
Saturday	A chance of light rain, with a high of 62. Cloudy in the morning, with a bit of the cloudiness clearing, becoming mostly cloudy by the afternoon. Chance of precipitation will be 46%. Humidity 97% in the morning, rising to 100% by the afternoon. Winds will be a light breeze, SSW-WSW at 3-5 mph, gusting to a gentle breeze, 8-9 mph.
Saturday Night	A chance of light rain, with a low of 50. Mostly cloudy through the night. Chance of precipitation will be 48%. Humidity 81% in the evening, rising to 97% after midnight. Winds will be a light breeze, SSE-WNW at 5 mph, gusting to a gentle breeze, 9 mph.
Sunday	Light rain likely, with a high of 62. Cloudy through the day. Chance of precipitation will be 60%. Humidity 100% through the day. Winds will be a light breeze, SSE-S at 3-6 mph, gusting to a moderate breeze, 8-13 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: 4 days, 19 hours, 15 minutes
Server uptime: 4 days, 19 hours, 16 minutes
weewx v5.2.0

Sun
Start civil twilight:	06:44:20
Sunrise:	07:13:49
Transit:	12:02:55
Sunset:	16:51:56
End civil twilight:	17:21:24
Prev. Day Length:	09:38:33
Curr. Day Length:	09:38:07
Curr. Shorter by:	00:00:26
Azimuth:	283.2°
Altitude:	-55.4°
Right ascension:	262.9°
Declination:	-23.3°
Solstice:	12/21/25 07:02:51
Equinox:	03/20/26 07:45:53

Moon
Rise:	02:23:29
Transit:	07:58:00
Set:	13:24:43
Duration Seen:	11:01
Azimuth:	41.6°
Altitude:	-63.0°
Right ascension:	207.6°
Declination:	-15.6°
New moon:	12/19/25 17:43:17
Full moon:	01/03/26 02:02:50
Phase:	Waning crescent (20% 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.