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City of Fontana, CAFontana, CA 7-Day Night Weather Forecast
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Fontana, CA Weather Forecast
Fontana, CA Weather Forecast Date: 137 AM PDT Tue Oct 06 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 97 to 103. Areas of winds east to 10 mph becoming southwest this afternoon.
Tonight... Clear. Lows 67 to 72. Areas of winds west 10 mph in the evening becoming light.
Wednesday... Mostly sunny. Hot. Highs 96 to 102. Light winds becoming west 10 to 15 mph in the afternoon.
Wednesday Night... Mostly clear. Lows 66 to 71. Areas of winds southwest to 10 mph in the evening becoming light.
Thursday... Sunny, hot. Highs 97 to 102. Light winds becoming west 10 to 15 mph in the afternoon.
Thursday Night... Clear. Lows 64 to 70.
Friday... Mostly sunny. Highs 93 to 98.
Friday Night... Mostly clear. Lows 63 to 68.
Saturday... Partly cloudy in the morning...Becoming mostly sunny. Highs 86 to 90.
Saturday Night... Mostly clear. Lows 57 to 63.
Sunday... Partly cloudy with a slight chance of showers. Highs 78 to 82.
Sunday Night... Partly cloudy. A slight chance of showers in the evening, then a chance of showers overnight. Lows 52 to 58.
POP = Probability of Precipitation
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