Weather World
City of Fontana, CAFontana, CA 7-Day Night Weather Forecast
Quick Weather Clicks
Settings
Sun & Moon
Weather Quote O' the Day
Fontana, CA Weather Forecast
Fontana, CA Weather Forecast Date: 1203 AM PDT Mon Oct 05 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 96 to 102. Areas of winds southeast 10 to 15 mph. Gusts to 25 mph this morning.
Tonight... Mostly clear. Lows 66 to 71. Areas of winds east 10 mph.
Tuesday... Mostly sunny. Hot. Highs 96 to 102. Areas of winds east to 10 mph becoming southwest in the afternoon.
Tuesday Night... Mostly clear. Lows 64 to 70. Areas of winds east to 10 mph in the evening becoming light.
Wednesday... Sunny, hot. Highs 99 to 105. Light winds becoming west 10 to 15 mph with gusts to 25 mph in the afternoon.
Wednesday Night... Clear. Lows 64 to 69.
Thursday... Sunny, hot. Highs 97 to 102.
Thursday Night... Clear. Lows 66 to 71.
Friday... Sunny, hot. Highs 95 to 100.
Friday Night... Mostly clear. Lows 64 to 69.
Saturday... Mostly sunny. Highs 87 to 92.
Saturday Night... Mostly clear. Lows 58 to 64.
POP = Probability of Precipitation
Fontana Radar Loop
Use the map search tool if you want to place a location marker on the radar map...