Saratoga, California (West Valley College Area)

Current Weather Conditions, Maps, and Forecasts

Saturday December 21, 2024; 9:20PM

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 informationis locally derived or extracted from other locations on the Internet. In particular, the output 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 17 - GOOD (Using 2024 US-EPA PM2.5 conversion) Air quality is considered satisfactory, and air pollution poses little or no risk.
Outside Temperature	56.2°F
Wind Chill	56.2°F
Heat Index	55.8°F
Dew Point	53.9°F
Humidity	92%
Barometer	30.168 inHg
Barometer Trend (3 hours)	0.031 inHg
Wind	0 mph
Rain Rate	0.00 in/h
Garage Temperature	63.1°F
UV Index	0.0
ET	0.00 in
Radiation	0 W/m²
Using 2024 US-EPA PM2.5 conversion
Latest PM2.5 [AQI]	3.0256 μg/m³ [17]
Latest PM10 [AQI]	5 μg/m³ [5]

Since Midnight

High Temperature Low Temperature	60.7°F at 14:53:13 52.7°F at 00:00:02
High Heat Index Low Wind Chill	60.4°F at 15:11:49 52.7°F at 00:00:02
High Humidity Low Humidity	92% at 00:00:02 79% at 07:58:44
High Dewpoint Low Dewpoint	55.8°F at 15:11:49 50.0°F at 09:01:18
High Barometer Low Barometer	30.202 inHg at 10:38:05 30.102 inHg at 00:46:03
Today's Rain	0.00 in
High Rain Rate	0.00 in/h at 00:00:02
High Wind	12 mph from 155° (SSE) at 07:44:54
Average Wind	1 mph
RMS Wind	1 mph
Vector Average Speed Vector Average Direction	1 mph 155°
High Garage Temperature Low Garage Temperature	63.2°F at 19:20:00 58.9°F at 00:00:02
High UV Low UV	0.8 at 13:09:19 0.0 at 00:00:02
High ET Low ET	0.01 in at 14:00:00 0.00 in at 00:05:00
High Radiation Low Radiation	315 W/m² at 13:11:42 0 W/m² at 00:00:02
Using 2024 US-EPA PM2.5 conversion
High PM2.5 [AQI] Low PM2.5 [AQI]	3.793 μg/m³ [21] at 19:51:48 0.4918 μg/m³ [3] at 00:04:58
High PM10 [AQI] Low PM10 [AQI]	7 μg/m³ [6] at 19:51:48 0 μg/m³ [0] at 00:14:58

Rain Year (1-Oct start)

Rain Year Total

6.52 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

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
Sat, 21 Dec 2024 21:00:02 -0800 (PST)

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

Saturday
Night
A chance of light rain

Lo 53 °F
Precp 31%
Chance
Rain

Sunday
A chance of light rain

Hi 68 °F
Precp 43%
Chance
Rain

Sunday
Night
Light rain likely

Lo 55 °F
Precp 55%
Rain
Likely

Monday
Mostly Cloudy

Hi 69 °F
Precp 11%
Mostly
Cloudy

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

Lo 51 °F
Precp 67%
Rain
Showers

Tuesday
Light rain likely

Hi 62 °F
Precp 96%
Rain
Likely

Tuesday
Night
Partly Cloudy

Lo 42 °F
Precp 15%
Partly
Cloudy

Christmas
Day
Partly Sunny

Hi 59 °F
Precp 0%
Partly
Sunny

Saturday Night	A chance of light rain, with a low of 53. Mostly cloudy through the night. Expecting approximately 0.04 inches of rain, mostly after midnight. Chance of precipitation is 31%. Humidity 93% in the evening, rising to 100% after midnight. Winds are a light breeze, SSE-SSW at 3-6 mph, gusting to a moderate breeze, 9-18 mph.
Sunday	A chance of light rain, with a high of 68. Cloudy in the morning, with some overcast clearing, becoming partly cloudy by the afternoon. Expecting approximately 0.01 inches of rain, mostly in the morning. Chance of precipitation will be 43%. Humidity 100% in the morning, lowering to 80% by the afternoon. Winds will be a gentle breeze, S at 5-9 mph, gusting to a moderate breeze, 10-14 mph. Sustained winds stronger in the afternoon.
Sunday Night	Light rain likely, with a low of 55. Partly cloudy in the evening, with some increasing clouds, becoming mostly cloudy after midnight. Expecting approximately 0.01 inches of rain. Chance of precipitation will be 55%. Humidity 90% in the evening, rising to 96% after midnight. Winds will be a gentle breeze, SSE-S at 3-9 mph, gusting to a moderate breeze, 9-16 mph. Sustained winds stronger in the evening.
Monday	High of 69. Mostly cloudy in the morning, with a bit of the overcast clearing, becoming partly cloudy by the afternoon. Chance of precipitation will be 11%. Humidity 97% in the morning, lowering to 81% by the afternoon. Winds will be a gentle breeze, SSE-S at 3-10 mph, gusting to a moderate breeze, 9-18 mph. Winds stronger in the afternoon.
Monday Night	Moderate rain showers certain, with a slight chance of thunderstorms, with a low of 51. Mostly cloudy in the evening, with full overcast conditions arriving, becoming cloudy after midnight. Expecting approximately 0.25 inches of rain. Chance of precipitation will be 67%. Humidity 90% in the evening, rising to 97% after midnight. Winds will be a gentle breeze, S at 6-10 mph, gusting to a strong breeze (small-craft advisory!), 14-26 mph.
Tuesday	Light rain likely, with a high of 62. Cloudy in the morning, with a bit of the cloudiness clearing, becoming mostly cloudy by the afternoon. Expecting approximately 0.45 inches of rain, mostly in the morning. Chance of precipitation will be 96%. Humidity 100% in the morning, lowering to 81% by the afternoon. Winds will be a gentle breeze, SW-WNW at 8-9 mph, gusting to a moderate breeze, 17-18 mph.
Tuesday Night	Low of 42. Mostly clear through the night. Chance of precipitation will be 15%. Humidity 77% in the evening, rising to 89% after midnight. Winds will be a gentle breeze, WNW-NW at 5-8 mph, gusting to a moderate breeze, 10-16 mph.
Christmas Day	High of 59. Partly cloudy through the day. Humidity 97% in the morning, lowering to 83% by the afternoon. Winds will be a light air, NNW at 2-3 mph, gusting to a light breeze, 6-7 mph.
Wednesday Night	Low of 44. Partly cloudy in the evening, with some increasing clouds, becoming mostly cloudy after midnight. Chance of precipitation will be 15%. Humidity 66% in the evening, rising to 83% after midnight. Winds will be a light breeze, NW-NNW at 2-5 mph, gusting to a gentle breeze, 5-8 mph. Sustained winds stronger in the evening.
Thursday	Light rain likely, with a high of 59. Mostly cloudy through the day. Chance of precipitation will be 59%. Humidity 86% in the morning, lowering to 80% by the afternoon. Winds will be a light breeze, SSE at 3-6 mph, gusting to a moderate breeze, 7-13 mph.
Thursday Night	Light rain likely, with a low of 48. Mostly cloudy through the night. Chance of precipitation will be 57%. Humidity 78% in the evening, rising to 90% after midnight. Winds will be a light breeze, S-SW at 5-6 mph, gusting to a gentle breeze, 9-10 mph.
Friday	A chance of light rain, with a high of 60. Mostly cloudy through the day. Chance of precipitation will be 42%. Humidity 92% in the morning, lowering to 86% by the afternoon. Winds will be a light breeze, SSE at 3-5 mph, gusting to a gentle breeze, 10-12 mph.
Friday Night	A chance of light rain, with a low of 50. Mostly cloudy through the night. Chance of precipitation will be 45%. Humidity 78% in the evening, rising to 86% after midnight. Winds will be a light breeze, SSE-S at 3-6 mph, gusting to a gentle breeze, 7-9 mph.
Saturday	A chance of light rain, with a high of 66. Mostly cloudy through the day. Chance of precipitation will be 38%. Humidity 93% in the morning, lowering to 84% by the afternoon. Winds will be a light air, SSE at 2-3 mph, gusting to a gentle breeze, 6-8 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, 1 hour, 38 minutes
Server uptime: 0 days, 1 hour, 38 minutes
weewx v5.1.0

Sun
Start civil twilight:	06:48:34
Sunrise:	07:18:11
Transit:	12:06:28
Sunset:	16:54:45
End civil twilight:	17:24:22
Prev. Day Length:	09:36:34
Curr. Day Length:	09:36:34
Curr. Longer by:	00:00:00
Azimuth:	279.2°
Altitude:	-51.8°
Right ascension:	270.9°
Declination:	-23.4°
Equinox:	03/20/25 02:01:14
Solstice:	06/20/25 19:42:18

Moon
Rise:	23:33:58
Transit:	05:13:02
Set:	11:40:51
Duration Seen:	12:07
Azimuth:	64.4°
Altitude:	-25.5°
Right ascension:	174.6°
Declination:	2.9°
New moon:	12/30/24 14:26:44
Full moon:	01/13/25 14:26:51
Phase:	Last quarter (57% 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.