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

Currently 102°F in San Jacinto, California, USA

Tuesday, August 18, 2026 3:33 PM PDT

San Jacinto Forecast Summary

Today	Tomorrow	Thursday

Sunny, Hot	Sunny, Hot	Sunny, Hot
High: 101°F	High: 104°F	High: 104°F
Low: 70°F	Low: 71°F	Low: 72°F

Complete Forecast Text Below

Currently in San Jacinto

Temperature, Humidity, Wind & Pressure

Time:	3:33 PM PDT
Temperature:	102°F
Normal Temperature :	97°F
Relative Humidity:	14%
Dewpoint:	42°F
Heat Index:	97°F
Wind Chill:	102°F
Wind:	4 mph NW (327°)
Gusts:	14 mph
Barometer:	30.37" Hg falling

Sunrise & Sunset

	Sunrise	Sunset	Daylight
Today:	6:13 AM	7:31 PM	13:18
Tomorrow:	6:14 AM	7:30 PM	13:16
30 Day Sunrise and Sunset Almanac

Extreme Temperatures

	Today	Time	Normal	Last Year
High:	102°F	3:30 PM	97°F	98°F
Low:	69°F	5:38 AM	65°F	62°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:

102°F

Hemet:

101°F

Lake Elsinore:

108°F

Moreno Valley:

99°F

Riverside (Canyon Crest):

99°F

Riverside (Presidential Park):

96°F

Temecula:

N/A*

* Weather report not current

Complete Local Weather Roundup

San Jacinto Forecast

Tuesday, August 18, 2026

This afternoon in San Jacinto, the weather will be mostly sunny and hot, with temperatures climbing to near 101° and a southwest breeze around 10 mph, with gusts near 20 mph. Tonight stays mostly clear and mild, cooling to around 70°.

Wednesday brings more sunshine and even more heat, with a high near 104° and a southwest wind around 10 mph, with gusts near 20 mph. Thursday stays sunny and very warm near 104°, then the heat eases a bit Friday and Saturday with highs near 100°, before slipping to 99° Sunday and 98° Monday. Nights stay mostly clear, with lows in the upper 60s to around 72°.

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

Pollen level is rated "low-medium".

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

Tonight: Mostly clear, low around 71°F.

Wednesday: Sunny and hot, high of about 104°F.

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

Thursday: Sunny and hot, high around 104°F.

Thursday night: Mostly clear, low of about 72°F.

Friday: Sunny and hot, high near 100°F.

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

Saturday: Sunny and hot, high of about 100°F.

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

Sunday: Sunny and hot, high around 99°F.

Sunday night: Mostly clear, low of about 70°F.

Monday: Sunny and hot, high near 98°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 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"
August 12	93°F	67°F	78°F	0.00"
August 11	98°F	76°F	N/A	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.

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San Jacinto Weather News

Extreme heat to remain in place through Sunday

An Extreme Heat Warning issued by the National Weather Service for the inla ...

Posted August 1, 2026, 6:20 PM

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Other Weather Information

Temperature, Humidity, Wind & Pressure

Sunrise & Sunset

Extreme Temperatures

Precipitation

National Weather Service

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