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Rialto, CA vs San Bernardino, CA weather comparison

Rialto

CA

San Bernardino picks up around 14 more inches of snow each winter.

The year at a glance

Averages from 30 years of climate history, 1991-2020

Annual weather statistics for Rialto, CA and San Bernardino, CA
RialtoMetricSan Bernardino
284 daysSunny daysclear or partly cloudy skies296 days
10 inPrecipitationper year12 in
34 daysWet daysrain or snow per year42 days
0 inSnowfallper year14 in
103 daysHot daysabove 90 °F106 days
1 daysFreezing nightsat or below 32 °F3 days
57%Humidityaverage relative55%
67 °FAverage temperatureyear round66 °F

Monthly temperatures

Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.

RialtoSan Bernardino

Daily highs

708090JanMarMayJulSepNovRialto, Jan: 69 °FRialto, Feb: 69 °FRialto, Mar: 72 °FRialto, Apr: 76 °FRialto, May: 81 °FRialto, Jun: 88 °FRialto, Jul: 94 °FRialto, Aug: 96 °FRialto, Sep: 93 °FRialto, Oct: 83 °FRialto, Nov: 76 °FRialto, Dec: 68 °FSan Bernardino, Jan: 68 °FSan Bernardino, Feb: 69 °FSan Bernardino, Mar: 72 °FSan Bernardino, Apr: 76 °FSan Bernardino, May: 81 °FSan Bernardino, Jun: 88 °FSan Bernardino, Jul: 95 °FSan Bernardino, Aug: 96 °FSan Bernardino, Sep: 93 °FSan Bernardino, Oct: 83 °FSan Bernardino, Nov: 76 °FSan Bernardino, Dec: 68 °F

Daily lows

405060JanMarMayJulSepNovRialto, Jan: 44 °FRialto, Feb: 45 °FRialto, Mar: 47 °FRialto, Apr: 50 °FRialto, May: 55 °FRialto, Jun: 59 °FRialto, Jul: 64 °FRialto, Aug: 64 °FRialto, Sep: 62 °FRialto, Oct: 55 °FRialto, Nov: 48 °FRialto, Dec: 43 °FSan Bernardino, Jan: 42 °FSan Bernardino, Feb: 43 °FSan Bernardino, Mar: 46 °FSan Bernardino, Apr: 49 °FSan Bernardino, May: 54 °FSan Bernardino, Jun: 58 °FSan Bernardino, Jul: 63 °FSan Bernardino, Aug: 64 °FSan Bernardino, Sep: 60 °FSan Bernardino, Oct: 54 °FSan Bernardino, Nov: 46 °FSan Bernardino, Dec: 41 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Rialto high696972768188949693837668
San Bernardino high686972768188959693837668
Rialto low444547505559646462554843
San Bernardino low424346495458636460544641

Monthly precipitation

Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.

RialtoSan Bernardino
0.01.02.0JanMarMayJulSepNovRialto, Jan: 2.2 inRialto, Feb: 2.6 inRialto, Mar: 1.6 inRialto, Apr: 0.7 inRialto, May: 0.4 inRialto, Jun: 0.1 inRialto, Jul: 0.1 inRialto, Aug: 0.0 inRialto, Sep: 0.1 inRialto, Oct: 0.5 inRialto, Nov: 0.7 inRialto, Dec: 1.6 inSan Bernardino, Jan: 2.2 inSan Bernardino, Feb: 2.7 inSan Bernardino, Mar: 1.6 inSan Bernardino, Apr: 0.8 inSan Bernardino, May: 0.3 inSan Bernardino, Jun: 0.1 inSan Bernardino, Jul: 0.5 inSan Bernardino, Aug: 0.4 inSan Bernardino, Sep: 0.3 inSan Bernardino, Oct: 0.5 inSan Bernardino, Nov: 0.7 inSan Bernardino, Dec: 1.7 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Rialto2.22.61.60.70.40.10.10.00.10.50.71.6
San Bernardino2.22.71.60.80.30.10.50.40.30.50.71.7

Monthly sunny days

Days each month with clear or partly cloudy skies, so compare the same month between cities.

RialtoSan Bernardino
0102030JanMarMayJulSepNovRialto, Jan: 19 daysRialto, Feb: 16 daysRialto, Mar: 18 daysRialto, Apr: 21 daysRialto, May: 24 daysRialto, Jun: 27 daysRialto, Jul: 29 daysRialto, Aug: 30 daysRialto, Sep: 28 daysRialto, Oct: 26 daysRialto, Nov: 24 daysRialto, Dec: 21 daysSan Bernardino, Jan: 20 daysSan Bernardino, Feb: 17 daysSan Bernardino, Mar: 21 daysSan Bernardino, Apr: 24 daysSan Bernardino, May: 26 daysSan Bernardino, Jun: 28 daysSan Bernardino, Jul: 29 daysSan Bernardino, Aug: 30 daysSan Bernardino, Sep: 29 daysSan Bernardino, Oct: 28 daysSan Bernardino, Nov: 24 daysSan Bernardino, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Rialto191618212427293028262421
San Bernardino201721242628293029282421

Keep comparing

Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.

Rialto vs another city

See the full Rialto, CA climate profile

More California cities

San Bernardino vs another city

See the full San Bernardino, CA climate profile

More California cities

About this data

Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. 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).