Coloma · Photo: The original uploader was Swampyank at English Wikipedia. · CC BY-SA 3.0July in Coloma runs hotter than in 94% of U.S. towns
The depth of winter brings overnight lows near 36°. A year here swings 59° from midwinter lows to midsummer highs. By January nights alone, it runs milder than 83% of U.S. towns. Plan time outside from March to May and October to November, when highs sit at 64–78°.
A year in Coloma at a glance
Each month’s typical high and low, and what it brings.
What stands out about Coloma’s climate
Compared with towns across the U.S., with Coloma’s place in California beside it.
What a year in Coloma feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 286 frost-free days a year
In half of years the last 32° night comes by February 25 and the first by December 5. Frost and day counts come from NOAA’s station at Auburn, CA, 12 miles from the town’s center, 310 ft higher.
The 2023 USDA map puts Coloma’s center in zone 9b: the coldest night of a typical winter, averaged over 1991–2020, reaches about 26°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 7 inches of snow a winter
Snow, measured at Colfax, CA, falls mostly in February. Precipitation (rain plus melted snow) adds up to 33 inches a year; January is the wettest month and July the driest. Rain or snow falls on about 76 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Coloma
66% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Auburn, CA.
Living with Coloma’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
286 frost-free days in zone 9b. The last frost comes by Feb 25 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Dec 5.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 6.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Coloma from natural hazards, wildfire is the largest share (68%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Coloma and similar climates
TownRatings has no climate map of the towns around Coloma yet.
Climates most like Coloma’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Coloma, CA | 36° | 94° | 33" | 7.2" |
| Saginaw, TX | 35° | 96° | 36" | 2.0" |
| Lone Grove, OK | 31° | 94° | 39" | 2.7" |
| Grants Pass, OR | 34° | 90° | 33" | 0.9" |
| Cayce, SC | 35° | 93° | 46" | 1.2" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
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°).
A smaller shift than in 86% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Coloma compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Coloma’s place among California’s.
Coloma weather by month
Highs, lows and precipitation from NOAA’s grid at Coloma’s center; snow, wet days and snow on the ground from Colfax, CA. 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" | 0.0" | 6 | 0 | 54° – 71° |
| June | 87° | 55° | 0.4" | 0.0" | 2 | 0 | 65° – 76° |
| July | 94° | 60° | 0.0" | 0.0" | 0 | 0 | 73° – 81° |
| August | 94° | 58° | 0.0" | 0.0" | 1 | 0 | 72° – 80° |
| September | 88° | 55° | 0.3" | 0.0" | 1 | 0 | 67° – 76° |
| October | 77° | 47° | 1.6" | 0.0" | 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 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 54° to 71°. December is the most reliable, staying within 7°.
Where Coloma’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Coloma’s center.
- Snow: Colfax, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Auburn, CA, 12 miles from the town’s center, 310 ft higher; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Coloma’s climate
What is the weather like in Coloma?
A typical July afternoon reaches 94°, a January night drops to 36°, and about 7 inches of snow falls in a normal winter. Milder January nights than 83% of U.S. towns; hotter July afternoons than 94% of U.S. towns.
How cold does it get in Coloma in winter?
December nights average 35°. About 20 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 42°.
How much snow does Coloma get?
About 7.2 inches in a normal winter at Colfax, CA, most of it in February, with snow on the ground about 1 days a year.
How hot does it get in Coloma?
July, with a typical high of 94° and a low of 60°. About 63 days a year reach 90° and 7 reach 100° (Auburn, CA).
When is the first and last frost in Coloma?
In half of years the last spring frost (32°) comes by February 25 and the first fall frost by December 5, about 286 frost-free days, at Auburn, CA.
What growing zone is Coloma in?
Zone 9b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 26°.
What is the best time of year to visit Coloma?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, October and November. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Coloma getting warmer?
Yes: 1991–2020 averaged 0.9° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 86% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Coloma.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.