Weather World
Winchester, CA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Winchester, CA Weather Forecast
Winchester, CA Weather Forecast Date: 1204 AM PDT Thu Sep 10 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. Hot. Highs 100 to 108. Areas of winds south to 10 mph becoming west with gusts to 25 mph this afternoon.
Tonight... Mostly clear. Lows 68 to 73. Areas of winds west 10 to 15 mph with gusts to 25 mph in the evening becoming light.
Friday... Sunny. Highs 94 to 100. Areas of winds south to 10 mph becoming west with gusts to 25 mph in the afternoon.
Friday Night... Mostly clear. Lows 63 to 69. Areas of winds south 10 to 15 mph in the evening becoming light.
Saturday... Mostly sunny. Highs 87 to 92. Areas of winds south to 10 mph becoming southwest with gusts to 25 mph in the afternoon.
Saturday Night... Mostly clear. Lows 57 to 64.
Sunday... Mostly sunny. Highs 84 to 89.
Sunday Night... Clear. Lows 57 to 64.
Monday... Mostly sunny. Highs 84 to 89.
Monday Night... Clear. Lows 53 to 61.
Tuesday... Mostly sunny. Highs 82 to 87.
Tuesday Night... Mostly clear. Lows 53 to 61.
POP = Probability of Precipitation
Winchester Radar Loop
Use the map search tool if you want to place a location marker on the radar map...