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Fontana, CA weather and climate

San Bernardino County, CA · population 211,921 · about 1,309 ft elevation

Everything below is a 30 year average for 1991-2020, computed from daily climate history at Fontana's own coordinates.

The year at a glance

Sunny days
284
clear or partly cloudy, per year
Precipitation
11 in
per year
Wet days
36
rain or snow per year
Snowfall
0 in
per year
Hot days
97
above 90 °F
Freezing nights
2
at or below 32 °F
Humidity
59%
average relative
Average temperature
67 °F
year round

Monthly temperatures

Average daily high and low for each month, in °F.

Daily highDaily low
406080JanMarMayJulSepNovDaily high, Jan: 68 °FDaily high, Feb: 69 °FDaily high, Mar: 72 °FDaily high, Apr: 76 °FDaily high, May: 80 °FDaily high, Jun: 87 °FDaily high, Jul: 94 °FDaily high, Aug: 95 °FDaily high, Sep: 92 °FDaily high, Oct: 82 °FDaily high, Nov: 75 °FDaily high, Dec: 67 °FDaily low, Jan: 44 °FDaily low, Feb: 46 °FDaily low, Mar: 48 °FDaily low, Apr: 51 °FDaily low, May: 55 °FDaily low, Jun: 60 °FDaily low, Jul: 64 °FDaily low, Aug: 65 °FDaily low, Sep: 63 °FDaily low, Oct: 56 °FDaily low, Nov: 48 °FDaily low, Dec: 43 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high686972768087949592827567
Daily low444648515560646563564843

Monthly precipitation

Total rain plus melted snow for each month, in inches.

0.01.02.0JanMarMayJulSepNovFontana, Jan: 2.2 inFontana, Feb: 2.6 inFontana, Mar: 1.6 inFontana, Apr: 0.7 inFontana, May: 0.4 inFontana, Jun: 0.1 inFontana, Jul: 0.1 inFontana, Aug: 0.0 inFontana, Sep: 0.1 inFontana, Oct: 0.5 inFontana, Nov: 0.7 inFontana, Dec: 1.6 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Fontana2.22.61.60.70.40.10.10.00.10.50.71.6

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovFontana, Jan: 19 daysFontana, Feb: 16 daysFontana, Mar: 18 daysFontana, Apr: 21 daysFontana, May: 24 daysFontana, Jun: 27 daysFontana, Jul: 29 daysFontana, Aug: 30 daysFontana, Sep: 28 daysFontana, Oct: 26 daysFontana, Nov: 24 daysFontana, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Fontana191618212427293028262421

Compare Fontana with another city

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See weather for every covered California city

About this data

Figures are 30 year averages for 1991-2020. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.

Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).