San Jacinto Weather Pages - Current and Past Weather, Forecasts and News for San Jacinto, California

Currently 91°F in San Jacinto, California, USA

Thursday, August 20, 2026 6:50 PM PDT

San Jacinto Forecast Summary

Today	Tomorrow	Saturday

Sunny, Hot	Sunny, Chance of thunderstorms	Sunny, Hot
High: 102°F	High: 102°F	High: 102°F
Low: 72°F	Low: 72°F	Low: 72°F

Complete Forecast Text Below

Currently in San Jacinto

Temperature, Humidity, Wind & Pressure

Time:	6:50 PM PDT
Temperature:	91°F
Normal Temperature :	88°F
Relative Humidity:	33%
Dewpoint:	57°F
Heat Index:	90°F
Wind Chill:	91°F
Wind:	5 mph SW (217°)
Gusts:	11 mph
Barometer:	30.38" Hg rising

Sunrise & Sunset

	Sunrise	Sunset	Daylight
Today:	6:12 AM	7:28 PM	13:15
Tomorrow:	6:13 AM	7:27 PM	13:14
30 Day Sunrise and Sunset Almanac

Extreme Temperatures

	Today	Time	Normal	Last Year
High:	104°F	1:58 PM	96°F	103°F
Low:	71°F	6:26 AM	65°F	65°F

Precipitation

60 Min.	Today	Month	Season
0.00"	0.00"	0.00"	0.00"
Season began July 1, 2026
Past Season Precipitation Totals

Data captured from a Davis Instruments Vantage Pro 2

Local Weather Roundup

San Jacinto:

91°F

Hemet:

91°F

Lake Elsinore:

90°F

Moreno Valley:

90°F

Riverside (Canyon Crest):

89°F

Riverside (Presidential Park):

N/A*

Temecula:

N/A*

* Weather report not current

Complete Local Weather Roundup

San Jacinto Forecast

Wednesday, August 19, 2026

Today's forecast is coming soon

This afternoon in San Jacinto, the weather will be hot and sunny, and a Heat Advisory remains in effect through Wednesday at 3:30 PM. Temperatures will climb to near 105° this afternoon, then ease back to around 71° tonight under mostly clear skies.

Tomorrow stays sunny and still very warm, with a high near 102°. A light south wind may pick up at times, and there is a slight chance of showers and thunderstorms Friday afternoon, but most of the extended outlook stays dry and sunny with highs around 101° to 102° and overnight lows near 71° to 72°.

Today: Sunny and hot , high near 105°F .

Pollen level is rated "low-medium".

Predicted air quality is good, AQI: 44 (courtesy of the SCAQMD).

Tonight: Mostly clear, low around 72°F.

Thursday: Sunny and hot, high of about 102°F.

Thursday night:Mostly clear, low near 72°F.

Friday: Sunny and hot with a slight chance of thunderstorms, high around 102°F.

Friday night: Mostly clear and warm, low of about 72°F.

Saturday: Sunny and hot, high near 102°F.

Saturday night: Mostly clear, low around 71°F.

Sunday: Sunny and hot, high of about 101°F.

Sunday night: Mostly clear, low near 70°F.

Monday: Sunny and hot, high around 101°F.

Monday night: Mostly clear, low of about 71°F.

Tuesday: Sunny and hot , high near 101°F.

Complete Forecast Page

San Jacinto forecast updated daily. Based on data from the National Weather Service, San Diego office and from WeatherCurrents.

Recently in San Jacinto

Date	High	Low	Ave.	Prec.
August 19	106°F	70°F	87°F	0.00"
August 18	102°F	69°F	85°F	0.00"
August 17	102°F	67°F	84°F	0.00"
August 16	98°F	66°F	81°F	0.00"
August 15	95°F	65°F	77°F	0.00"
August 14	90°F	66°F	77°F	0.00"
August 13	87°F	66°F	75°F	0.00"
More Past Weather

San Jacinto Featured Photos

Full moon: The evening moon rises above Mountain View High School in San Jacinto. Photo courtesy of Denise Leonard.

More Photos and Features Submit Your Photo

San Jacinto Weather News

Heat Advisory continues into Thursday across inland valleys

A heat advisory issued by the National Weather Service for the interior val ...

Posted August 19, 2026, 11:34 PM

More San Jacinto Weather News

Other Weather Information

Temperature, Humidity, Wind & Pressure

Sunrise & Sunset

Extreme Temperatures

Precipitation

National Weather Service

Other San Jacinto Weather Forecasts

Other Local Forecasts