San Jacinto Forecast Summary
Currently in San Jacinto
Temperature, Humidity, Wind & Pressure
Sunrise & Sunset
Extreme Temperatures
Precipitation
Data captured from a Davis Instruments Vantage Pro 2
Local Weather Roundup
San Jacinto:
81°F
81°F
90°F
N/A*
79°F
80°F
N/A*
* Weather report not
current
San Jacinto Forecast
Wednesday, September 17, 2025
Today's Forecast: San Jacinto residents should be aware of a slight chance of showers and thunderstorms after 11am, with partly sunny skies and a high near 91 degrees. While rainfall is expected to be minimal, with new amounts less than a tenth of an inch, it's wise to keep an umbrella at hand. There's a 20% chance of precipitation, so outdoor activities may proceed with only a slight risk of interruption. The Week Ahead: Shower and thunderstorm activity is set to increase tonight and continue into Thursday, with a 60-70% chance of precipitation and potential rainfall amounts up to half an inch. Temperatures will hover in the upper 80s, providing a mild backdrop to the wetter conditions. As we move into Friday and the weekend, the likelihood of rain decreases, and by Saturday, sunny skies will prevail with highs in the low 90s. The clear pattern is set to continue into next week, with no significant winds or other adverse weather conditions expected, making for excellent conditions for any outdoor weekend plans or early week activities. Today: Sunny. A slight chance of thunderstorms after 11am , high near 90°F . Pollen level is rated "medium". Predicted air quality is moderate, AQI: 54 (courtesy of the SCAQMD). Tonight: A chance of showers and thunderstorms, mainly after 11pm, low around 66°F. Thursday: Showers likely with thunderstorm activity also possible, high of about 86°F. Thursday night:Chance of showers and thunderstorms decreasing overnight, low near 64°F. Friday: Chance for showers and thunderstorms, high around 86°F. Friday night: Mostly clear, low of about 64°F. Saturday: Partly cloudy with a slight chance of thunderstorms after noon, high near 90°F. Saturday night: Mostly clear, low around 65°F. Sunday: Mostly sunny, high of about 92°F. Sunday night: Mostly clear, low near 67°F. Monday: Sunny and hot, high around 95°F. Monday night: Mostly clear, low of about 69°F. Tuesday: Sunny, high near 94°F. San Jacinto forecast updated daily. Based on data from the National Weather Service, San Diego office and from WeatherCurrents.Recently in
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Full moon: The evening moon rises above Mountain View High School in San Jacinto. Photo courtesy of Denise Leonard.
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