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

Currently 99°F in San Jacinto, California, USA

Thursday, September 10, 2026 4:30 PM PDT

San Jacinto Forecast Summary

Today	Tomorrow	Saturday

Mostly sunny, Hot	Sunny, Hot	Sunny
High: 105°F	High: 99°F	High: 91°F
Low: 76°F	Low: 71°F	Low: 67°F

Complete Forecast Text Below

Currently in San Jacinto

Temperature, Humidity, Wind & Pressure

Time:	4:30 PM PDT
Temperature:	99°F
Normal Temperature :	91°F
Relative Humidity:	30%
Dewpoint:	61°F
Heat Index:	101°F
Wind Chill:	99°F
Wind:	11 mph S (198°)
Gusts:	21 mph
Barometer:	30.30" Hg falling

Sunrise & Sunset

	Sunrise	Sunset	Daylight
Today:	6:29 AM	7:03 PM	12:34
Tomorrow:	6:30 AM	7:01 PM	12:32
30 Day Sunrise and Sunset Almanac

Extreme Temperatures

	Today	Time	Normal	Last Year
High:	104°F	1:44 PM	93°F	82°F
Low:	77°F	4:58 AM	64°F	62°F

Precipitation

60 Min.	Today	Month	Season
0.00"	0.00"	0.23"	0.23"
Season began July 1, 2026
Past Season Precipitation Totals

Data captured from a Davis Instruments Vantage Pro 2

Local Weather Roundup

San Jacinto:

99°F

Hemet:

99°F

Lake Elsinore:

102°F

Moreno Valley:

100°F

Riverside (Canyon Crest):

98°F

Riverside (Presidential Park):

98°F

Temecula:

N/A*

* Weather report not current

Complete Local Weather Roundup

San Jacinto Forecast

Thursday, September 10, 2026

This afternoon in San Jacinto, the weather will be sunny and very hot, and an Extreme Heat Warning remains in effect through this evening. Temperatures will climb to near 105°, with heat index values as high as 109° and a southwest wind around 5 to 15 mph, gusting near 25 mph. Skies stay mostly clear tonight as temperatures cool to around 70°.

Tomorrow will stay sunny, though a little cooler, with a high near 99° and a southwest wind around 10 mph, gusting near 20 mph. The warm, dry pattern continues through the weekend, with highs near 91° on Saturday, near 89° on Sunday, and near 88° on Monday. Overnight lows settle into the mid-60s this weekend, then dip to around 58° by Monday night and Tuesday night, with plenty of sunshine holding through midweek.

Today: Mostly sunny, dangerously hot and humid , 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 71°F.

Friday: Sunny and hot, high of about 99°F.

Friday night:Clear and cooler, low near 67°F.

Saturday: Sunny and cooler, high around 91°F.

Saturday night: Clear, low of about 62°F.

Sunday: Sunny, high near 88°F.

Sunday night: Mostly clear, low around 62°F.

Monday: Sunny, high of about 88°F.

Monday night: Clear, low near 58°F.

Tuesday: Sunny and nice, high around 86°F.

Tuesday night: Mostly clear, low of about 59°F.

Wednesday: Sunny, high near 88°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.
September 9	106°F	75°F	90°F	0.00"
September 8	99°F	71°F	85°F	0.00"
September 7	87°F	71°F	79°F	0.03"
September 6	79°F	66°F	73°F	0.20"
September 5	93°F	59°F	78°F	0.00"
September 4	89°F	58°F	72°F	0.00"
September 3	88°F	56°F	71°F	0.00"
More Past Weather