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San Dimas, CA weather and climate

Los Angeles County, CA · population 34,099 · about 965 ft elevation

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

The year at a glance

Sunny days
290
clear or partly cloudy, per year
Precipitation
16 in
per year
Wet days
38
rain or snow per year
Snowfall
0 in
per year
Hot days
72
above 90 °F
Freezing nights
3
at or below 32 °F
Humidity
60%
average relative
Average temperature
65 °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: 67 °FDaily high, Mar: 72 °FDaily high, Apr: 76 °FDaily high, May: 79 °FDaily high, Jun: 85 °FDaily high, Jul: 91 °FDaily high, Aug: 93 °FDaily high, Sep: 89 °FDaily high, Oct: 81 °FDaily high, Nov: 74 °FDaily high, Dec: 67 °FDaily low, Jan: 43 °FDaily low, Feb: 44 °FDaily low, Mar: 47 °FDaily low, Apr: 50 °FDaily low, May: 54 °FDaily low, Jun: 57 °FDaily low, Jul: 62 °FDaily low, Aug: 63 °FDaily low, Sep: 61 °FDaily low, Oct: 54 °FDaily low, Nov: 47 °FDaily low, Dec: 42 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high686772767985919389817467
Daily low434447505457626361544742

Monthly precipitation

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

0.02.04.0JanMarMayJulSepNovSan Dimas, Jan: 3.6 inSan Dimas, Feb: 4.0 inSan Dimas, Mar: 2.4 inSan Dimas, Apr: 1.0 inSan Dimas, May: 0.4 inSan Dimas, Jun: 0.1 inSan Dimas, Jul: 0.1 inSan Dimas, Aug: 0.0 inSan Dimas, Sep: 0.2 inSan Dimas, Oct: 0.7 inSan Dimas, Nov: 1.0 inSan Dimas, Dec: 2.4 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Dimas3.64.02.41.00.40.10.10.00.20.71.02.4

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovSan Dimas, Jan: 19 daysSan Dimas, Feb: 17 daysSan Dimas, Mar: 20 daysSan Dimas, Apr: 23 daysSan Dimas, May: 25 daysSan Dimas, Jun: 28 daysSan Dimas, Jul: 29 daysSan Dimas, Aug: 30 daysSan Dimas, Sep: 29 daysSan Dimas, Oct: 27 daysSan Dimas, Nov: 24 daysSan Dimas, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
San Dimas191720232528293029272421

Compare San Dimas with another city

Nearby cities and popular picks. Any two cities can be compared from the home page.

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).