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

Currently 102°F in San Jacinto, California, USA

Wednesday, September 9, 2026 4:28 PM PDT

San Jacinto Forecast Summary

Today	Tomorrow	Friday

Mostly sunny, Chance of thunderstorms	Mostly sunny, Hot	Sunny, Hot
High: 106°F	High: 104°F	High: 97°F
Low: 76°F	Low: 76°F	Low: 72°F

Complete Forecast Text Below

Currently in San Jacinto

Temperature, Humidity, Wind & Pressure

Time:	4:28 PM PDT
Temperature:	102°F
Normal Temperature :	91°F
Relative Humidity:	28%
Dewpoint:	62°F
Heat Index:	105°F
Wind Chill:	102°F
Wind:	10 mph SW (203°)
Gusts:	20 mph
Barometer:	30.37" Hg falling

Sunrise & Sunset

	Sunrise	Sunset	Daylight
Today:	6:28 AM	7:04 PM	12:36
Tomorrow:	6:29 AM	7:03 PM	12:34
30 Day Sunrise and Sunset Almanac

Extreme Temperatures

	Today	Time	Normal	Last Year
High:	106°F	3:14 PM	94°F	89°F
Low:	75°F	6:55 AM	64°F	58°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:

102°F

Hemet:

99°F

Lake Elsinore:

109°F

Moreno Valley:

100°F

Riverside (Canyon Crest):

103°F

Riverside (Presidential Park):

103°F

Temecula:

N/A*

* Weather report not current

Complete Local Weather Roundup

San Jacinto Forecast

Wednesday, September 9, 2026

This afternoon in San Jacinto, the weather will be very hot, and an Extreme Heat Warning and Heat Advisory remain in effect through Wednesday at 8:00 PM. A slight chance of showers will linger through the afternoon, but most of the time it stays mostly sunny with a high near 106° and heat index values as high as 108°. Temperatures ease back to around 76° overnight under partly cloudy skies.

Tomorrow stays hot and mostly sunny with a high near 104° and heat index values as high as 108°. A light southwest breeze may pick up a bit during the afternoon, then Thursday night turns mostly clear and cooler with a low around 72°. Friday brings more sunshine and a high near 97°, followed by a mostly clear Friday night with a low around 65°. The weekend trends cooler and comfortable, with highs in the low 90s on Saturday and upper 80s on Sunday, then near 90° Monday and 89° Tuesday, while overnight lows settle into the upper 50s to near 60°.

Today: Sunny, dangerously hot and humid with a slight chance of showers or thunderstorms after 11am. , high near 106°F .

Pollen level is rated "low-medium".

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

Tonight: Partly cloudy and humid, low around 76°F.

Thursday: Mostly sunny, dangerously hot and humid, high of about 104°F.

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

Friday: Sunny and hot, high around 97°F.

Friday night: Clear and cooler, low of about 65°F.

Saturday: Sunny and cooler, high near 92°F.

Saturday night: Clear, low around 59°F.

Sunday: Sunny, high of about 89°F.

Sunday night: Mostly clear, low near 58°F.

Monday: Sunny, high around 90°F.

Monday night: Clear, low of about 57°F.

Tuesday: Sunny and nice, high near 89°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 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"
September 2	89°F	57°F	73°F	0.00"
More Past Weather