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El Cajon, CA weather and climate

San Diego County, CA · population 104,909 · about 433 ft elevation

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

The year at a glance

Sunny days
283
clear or partly cloudy, per year
Precipitation
12 in
per year
Wet days
38
rain or snow per year
Snowfall
0 in
per year
Hot days
58
above 90 °F
Freezing nights
2
at or below 32 °F
Humidity
70%
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: 69 °FDaily high, Feb: 69 °FDaily high, Mar: 71 °FDaily high, Apr: 74 °FDaily high, May: 76 °FDaily high, Jun: 81 °FDaily high, Jul: 86 °FDaily high, Aug: 89 °FDaily high, Sep: 87 °FDaily high, Oct: 81 °FDaily high, Nov: 75 °FDaily high, Dec: 69 °FDaily low, Jan: 43 °FDaily low, Feb: 44 °FDaily low, Mar: 48 °FDaily low, Apr: 51 °FDaily low, May: 56 °FDaily low, Jun: 59 °FDaily low, Jul: 63 °FDaily low, Aug: 65 °FDaily low, Sep: 62 °FDaily low, Oct: 56 °FDaily low, Nov: 47 °FDaily low, Dec: 42 °F
View monthly temperatures as a table
Monthly temperatures (°F)
CityJanFebMarAprMayJunJulAugSepOctNovDec
Daily high696971747681868987817569
Daily low434448515659636562564742

Monthly precipitation

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

0.01.02.03.0JanMarMayJulSepNovEl Cajon, Jan: 2.3 inEl Cajon, Feb: 2.9 inEl Cajon, Mar: 1.9 inEl Cajon, Apr: 0.9 inEl Cajon, May: 0.4 inEl Cajon, Jun: 0.1 inEl Cajon, Jul: 0.1 inEl Cajon, Aug: 0.1 inEl Cajon, Sep: 0.2 inEl Cajon, Oct: 0.6 inEl Cajon, Nov: 0.9 inEl Cajon, Dec: 1.9 in
View monthly precipitation as a table
Monthly precipitation (inches)
CityJanFebMarAprMayJunJulAugSepOctNovDec
El Cajon2.32.91.90.90.40.10.10.10.20.60.91.9

Monthly sunny days

Days each month with clear or partly cloudy skies.

0102030JanMarMayJulSepNovEl Cajon, Jan: 20 daysEl Cajon, Feb: 17 daysEl Cajon, Mar: 20 daysEl Cajon, Apr: 22 daysEl Cajon, May: 22 daysEl Cajon, Jun: 26 daysEl Cajon, Jul: 28 daysEl Cajon, Aug: 30 daysEl Cajon, Sep: 28 daysEl Cajon, Oct: 26 daysEl Cajon, Nov: 24 daysEl Cajon, Dec: 21 days
View monthly sunny days as a table
Monthly sunny days (days)
CityJanFebMarAprMayJunJulAugSepOctNovDec
El Cajon201720222226283028262421

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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).