San Jacinto River Park, CA 7-Day Night Weather Forecast
Quick Weather Clicks
Sun & Moon
Weather Quote O' the Day


San Jacinto River Park, CA Weather Forecast


San Jacinto River Park, CA Weather Forecast Date: 1238 AM PDT Sun Aug 09 2026
The area/counties/county of: San Bernardino And Riverside County Valleys, including the cities of: Riverside, San Bernardino, Ontario, Moreno Valley, Fontana, Rancho Cucamonga, and Corona.or toggle through each period.
Today... Mostly sunny this morning...Becoming partly cloudy. Highs 97 to 104. Areas of winds west to 10 mph...Becoming 10 to 15 mph with gusts to 30 mph this afternoon.
Tonight... Partly cloudy. Lows 65 to 70. Areas of winds southwest 10 to 15 mph with gusts to 25 mph in the evening becoming light.
Monday... Partly cloudy in the morning...Becoming mostly sunny. Highs 93 to 100. Areas of winds southwest to 10 mph...Becoming west 10 to 20 mph with gusts to 30 mph in the afternoon.
Monday Night... Partly cloudy. Lows 64 to 69. Areas of winds southwest 10 to 15 mph with gusts to 25 mph in the evening becoming light.
Tuesday... Partly cloudy with a slight chance of showers. Highs 90 to 97. Light winds becoming west 10 to 15 mph in the afternoon. Chance of measurable precipitation 20%.
Tuesday Night... Partly cloudy. Lows 62 to 67.
Wednesday... Partly cloudy in the morning...Becoming mostly sunny. Highs 88 to 94.
Wednesday Night... Mostly clear. Lows 59 to 64.
Thursday... Partly cloudy. Highs 85 to 92.
Thursday Night... Mostly clear. Lows 57 to 63.
Friday... Partly cloudy. Highs 85 to 92.
Friday Night... Mostly clear. Lows 58 to 63.
Weather World