Coloma, CA climate
Coloma has mild winters and hot summers. A typical July afternoon reaches 94°, a January night drops to 36°, and about 7 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Coloma feels like
Winter
Spring
Summer
Fall
Coloma 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° | 36° | 6.0" | 0.9" | 11 | 0 | 42° – 53° |
| February | 60° | 38° | 5.8" | 2.6" | 12 | 0 | 42° – 55° |
| March | 64° | 40° | 5.4" | 1.2" | 11 | 0 | 44° – 59° |
| April | 69° | 43° | 2.9" | 0.6" | 8 | 0 | 49° – 60° |
| May | 78° | 49° | 1.7" | 0 | 6 | 0 | 54° – 71° |
| June | 87° | 55° | 0.4" | 0 | 2 | 0 | 65° – 76° |
| July | 94° | 60° | 0.0" | 0 | 0 | 0 | 73° – 81° |
| August | 94° | 58° | 0.0" | 0 | 1 | 0 | 72° – 80° |
| September | 88° | 55° | 0.3" | 0 | 1 | 0 | 67° – 76° |
| October | 77° | 47° | 1.6" | 0 | 4 | 0 | 58° – 69° |
| November | 64° | 40° | 3.3" | 0.4" | 9 | 0 | 43° – 58° |
| December | 55° | 35° | 5.8" | 1.5" | 11 | 0 | 42° – 49° |
| Year | 74° | 46° | 33.2" | 7.2" | 76 | 1 |
“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 Coloma
Coloma gets 33 inches of rain and melted snow a year. January is the wettest month and July the driest. Rain or snow falls on about 76 days a year.
About 237 frost-free days a year
In half of years the last 32° night comes by March 31 and the first one by November 21. That leaves about 237 frost-free days for gardens, longer than 88% of U.S. towns.
Heating and cooling a home in Coloma
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Coloma, 71% of that work is heating and 29% 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.
How Coloma 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 Coloma averaged 0.9° warmer than the 1900s. The biggest change is in January (+1.8°). The shift is smaller than in 79% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Coloma’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. May swings the most: between 1991 and 2020 its average temperature ranged from 54° to 71°. December is the most reliable, staying within 7°.
Common questions about Coloma’s climate
What is the coldest month in Coloma?
December, with a typical high of 55° and a low of 35°.
What is the hottest month in Coloma?
July, with a typical high of 94° and a low of 60°. About 74 days a year reach 90°.
How much snow does Coloma get?
About 7 inches in a normal winter, most of it in February.
When is the first frost in Coloma?
In half of years the first 32° night comes by November 21, and the last spring frost by March 31.
What is the rainiest month in Coloma?
January, with 6.0 inches of rain and melted snow. The year totals 33 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Coloma itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Colfax, CA (20 mi, snow) and Placerville, CA (8 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.