Alhambra Valley, CA climate
Alhambra Valley has mild winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 40°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Alhambra Valley feels like
Winter
Spring
Summer
Fall
Alhambra Valley weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 56° | 40° | 4.9" | 0 | 10 | 0 | 45° – 54° |
| February | 60° | 42° | 4.7" | 0 | 10 | 0 | 46° – 56° |
| March | 64° | 44° | 3.7" | 0 | 8 | 0 | 48° – 60° |
| April | 68° | 46° | 1.7" | 0 | 5 | 0 | 53° – 61° |
| May | 73° | 50° | 0.8" | 0 | 3 | 0 | 56° – 68° |
| June | 80° | 54° | 0.1" | 0 | 1 | 0 | 63° – 69° |
| July | 83° | 56° | 0.0" | 0 | 0 | 0 | 67° – 74° |
| August | 84° | 57° | 0.0" | 0 | 0 | 0 | 67° – 74° |
| September | 82° | 55° | 0.1" | 0 | 1 | 0 | 65° – 73° |
| October | 75° | 51° | 1.1" | 0 | 3 | 0 | 60° – 70° |
| November | 64° | 45° | 2.5" | 0 | 6 | 0 | 47° – 59° |
| December | 56° | 40° | 5.0" | 0 | 9 | 0 | 44° – 52° |
| Year | 70° | 48° | 24.5" | 0.0" | 56 | 0 |
“Wet days” have at least 0.01" of rain or melted snow. “Snow on ground” counts days with 1" or more. The 30-year range is the coldest and warmest that month’s average temperature got between 1991 and 2020.
Rain and snow in Alhambra Valley
Alhambra Valley gets 24 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 56 days a year.
A year-round growing season
Heating and cooling a home in Alhambra Valley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Alhambra Valley, 65% of that work is heating and 35% is cooling.
Degree days measure how far each day’s average temperature falls below or rises above 65°, added up over a year. Source: NOAA station normals.
Alhambra Valley and its neighbors
Alhambra Valley borders 1 town with climate data. January nights across them vary by 0.5°. Martinez has both the coldest January nights (39°) and the hottest July afternoons (85°). Alhambra Valley’s January low is 40° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Alhambra Valley compares
Compared with every U.S. town and city on TownTapestry, each counted once.
Warmer than it used to be
The last 30 years in Alhambra Valley averaged 1.6° warmer than the 1900s. The biggest change is in January (+2.1°). The shift is larger than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Alhambra Valley’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 47° to 59°. June is the most reliable, staying within 6°.
Common questions about Alhambra Valley’s climate
What is the coldest month in Alhambra Valley?
January, with a typical high of 56° and a low of 40°.
What is the hottest month in Alhambra Valley?
August, with a typical high of 84° and a low of 57°. About 47 days a year reach 90°.
How much snow does Alhambra Valley get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Alhambra Valley?
Frost is uncommon. Only 80% of years see a night at 32° or below.
What is the rainiest month in Alhambra Valley?
December, with 5.0 inches of rain and melted snow. The year totals 24 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Alhambra Valley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Concord WWTP, CA (4 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.