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Fontana, CA Weather Tomorrow

Check tomorrow's weather in Fontana with a detailed 5 day forecast covering precipitation potential, daytime and nighttime forecasts, temperature highs and lows in Fahrenheit and Celsius, sunrise and sunset times, cloud cover, wind chill, wind speed, and wind direction for the Fontana area and around San Bernardino county, California.
Updated: Thu Aug 27th 2026 8:30 AM PDT
Fontana, CA Weather – 8-27 – Overcast
101° / 79°
Overcast
In Fontana, overcast is likely with a high near 101°F and a low around 79°F. There's a very small chance of rainfall, only about 9%. Wind will be moderate, blowing around 13mph on average and gusts of 20.6mph at 2 PM. Humidity levels should be comfortable, sitting around 39% on average, the maximum being 46% at 11 PM and 22% being its lowest at 3 PM. Barometric pressure is its highest of 29.86inHg at 9 AM, a lowest point of 29.76inHg at 5 PM with an avg 29.81inHg.
Fontana, CA Weather – 8-28 – Overcast
97° / 81°

Weather Tomorrow

Overcast
Fontana could see overcast with daytime highs of 97°F and nighttime lows near 81°F. There's a very small chance of rainfall, only about 5% with an estimated 0in. Wind will be moderate, blowing around 14mph on average and gusts of 24.4mph at 2 PM. Humidity levels should be comfortable, sitting around 34% on average, the maximum being 49% at 7 AM and 20% being its lowest at 1 PM. Barometric pressure is its highest of 29.86inHg at 9 AM, a lowest point of 29.77inHg at 5 PM with an avg 29.82inHg.
Fontana, CA Weather – 8-29 – Sunny
96° / 81°
Sunny
Fontana could see sunshine with daytime highs of 96°F and nighttime lows near 81°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 15mph on average and gusts of 15.7mph at 12 AM. Humidity levels should be comfortable, sitting around 32% on average, the maximum being 41% at 11 PM and 20% being its lowest at 2 PM. Barometric pressure is its highest of 29.88inHg at 8 AM, a lowest point of 29.76inHg at 5 PM with an avg 29.83inHg.
Fontana, CA Weather – 8-30 – Sunny
92° / 74°
Sunny
In Fontana, a sunny day is likely with a high near 92°F and a low around 74°F. There's a very small chance of rainfall, only about 1%. Wind will be moderate, blowing around 15mph on average and gusts of 23.7mph at 3 PM. Humidity levels should be comfortable, sitting around 34% on average, the maximum being 48% at 7 AM and 15% being its lowest at 4 PM. Barometric pressure is its highest of 29.88inHg at 11 PM, a lowest point of 29.78inHg at 4 PM with an avg 29.83inHg.
Fontana, CA Weather – 8-31 – Sunny
88° / 71°
Sunny
In Fontana, it will be sunny with highs near 88°F and lows around 71°F. Wind will be moderate, blowing around 15mph on average and gusts of 24.6mph at 5 PM. Humidity levels should be comfortable, sitting around 30% on average, the maximum being 48% at 5 AM and 18% being its lowest at 2 PM. Barometric pressure is its highest of 29.92inHg at 10 PM, a lowest point of 29.83inHg at 4 PM with an avg 29.87inHg.
Fontana, CA Weather – 9-1 – Sunny
86° / 72°
Sunny
Bright and sunny conditions in Fontana, with a high of 86°F and a low of 72°F. There might be light rainfall having a 17% chance with an estimated 0in. Wind will be moderate, blowing around 13mph on average and gusts of 17.9mph at 2 PM. The air will be relatively dry with average humidity levels below 30%, the maximum being 37% at 11 PM and 18% being its lowest at 3 PM. Barometric pressure is its highest of 29.99inHg at 8 PM, a lowest point of 29.9inHg at 4 PM with an avg 29.94inHg.

Currently

Overcast 82°F
29.86 inHg.
Barometer
50%
Humidity
WSW 6.5 mph
Wind
Overcast

5 Day Forecast Nearby

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