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Fort Irwin, CA weather and climate

San Bernardino County, CA · population 8,791 · about 2,474 ft elevation

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

The year at a glance

Sunny days
315
clear or partly cloudy, per year
Precipitation
4 in
per year
Wet days
19
rain or snow per year
Snowfall
1 in
per year
Hot days
110
above 90 °F
Freezing nights
17
at or below 32 °F
Humidity
35%
average relative
Average temperature
66 °F
year round

Monthly temperatures

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

Daily highDaily low
406080100JanMarMayJulSepNovDaily high, Jan: 57 °FDaily high, Feb: 61 °FDaily high, Mar: 68 °FDaily high, Apr: 75 °FDaily high, May: 84 °FDaily high, Jun: 94 °FDaily high, Jul: 99 °FDaily high, Aug: 98 °FDaily high, Sep: 91 °FDaily high, Oct: 78 °FDaily high, Nov: 65 °FDaily high, Dec: 56 °FDaily low, Jan: 38 °FDaily low, Feb: 40 °FDaily low, Mar: 45 °FDaily low, Apr: 50 °FDaily low, May: 57 °FDaily low, Jun: 65 °FDaily low, Jul: 72 °FDaily low, Aug: 72 °FDaily low, Sep: 66 °FDaily low, Oct: 55 °FDaily low, Nov: 44 °FDaily low, Dec: 37 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high576168758494999891786556
Daily low384045505765727266554437

Monthly precipitation

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

0.00.30.50.8JanMarMayJulSepNovFort Irwin, Jan: 0.8 inFort Irwin, Feb: 0.9 inFort Irwin, Mar: 0.5 inFort Irwin, Apr: 0.3 inFort Irwin, May: 0.1 inFort Irwin, Jun: 0.0 inFort Irwin, Jul: 0.1 inFort Irwin, Aug: 0.1 inFort Irwin, Sep: 0.1 inFort Irwin, Oct: 0.2 inFort Irwin, Nov: 0.3 inFort Irwin, Dec: 0.6 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Fort Irwin0.80.90.50.30.10.00.10.10.10.20.30.6

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovFort Irwin, Jan: 22 daysFort Irwin, Feb: 21 daysFort Irwin, Mar: 24 daysFort Irwin, Apr: 26 daysFort Irwin, May: 28 daysFort Irwin, Jun: 29 daysFort Irwin, Jul: 29 daysFort Irwin, Aug: 30 daysFort Irwin, Sep: 29 daysFort Irwin, Oct: 28 daysFort Irwin, Nov: 26 daysFort Irwin, Dec: 23 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Fort Irwin222124262829293029282623

Compare Fort Irwin 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).