Alum Rock, CA weather and climate
Santa Clara County, CA · population 11,619 · about 171 ft elevation
Everything below is a 30 year average for 1991-2020, computed from daily climate history at Alum Rock's own coordinates.
The year at a glance
- Sunny days
- 263
- clear or partly cloudy, per year
- Precipitation
- 22 in
- per year
- Wet days
- 56
- rain or snow per year
- Snowfall
- 0 in
- per year
- Hot days
- 20
- above 90 °F
- Freezing nights
- 3
- at or below 32 °F
- Humidity
- 67%
- average relative
- Average temperature
- 61 °F
- year round
Monthly temperatures
Average daily high and low for each month, in °F.
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Daily high | 59 | 63 | 66 | 70 | 74 | 80 | 82 | 82 | 81 | 75 | 65 | 59 |
| Daily low | 42 | 44 | 47 | 49 | 52 | 56 | 58 | 59 | 57 | 53 | 46 | 42 |
Monthly precipitation
Total rain plus melted snow for each month, in inches.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alum Rock | 4.5 | 4.5 | 3.3 | 1.6 | 0.8 | 0.2 | 0.1 | 0.0 | 0.1 | 1.0 | 1.9 | 3.9 |
Monthly sunny days
Days each month with clear or partly cloudy skies.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Alum Rock | 15 | 14 | 16 | 19 | 24 | 27 | 30 | 30 | 29 | 26 | 19 | 16 |
Compare Alum Rock with another city
Nearby cities and popular picks. Any two cities can be compared from the home page.
- Alum Rock vs East Foothills, CA
- Alum Rock vs San Jose, CA
- Alum Rock vs Milpitas, CA
- Alum Rock vs Burbank, CA
- Alum Rock vs Santa Clara, CA
- Alum Rock vs Campbell, CA
- Alum Rock vs New York, NY
- Alum Rock vs Los Angeles, CA
- Alum Rock vs Chicago, IL
- Alum Rock vs Houston, TX
- Alum Rock vs Phoenix, AZ
- Alum Rock vs Philadelphia, PA
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).