Clarksburg reaches 100° on about 14 days a year, more than 93% of U.S. towns
Nights in January average 39°. The wettest month is January; the driest is July. Its yearly precipitation falls short of 90% of U.S. towns. The outdoor season runs from March to May and October to November, with highs of 66–81°.
A year in Clarksburg at a glance
Each month’s typical high and low, and what it brings.
What stands out about Clarksburg’s climate
Compared with towns across the U.S., with Clarksburg’s place in California beside it.
What a year in Clarksburg feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 301 frost-free days a year
In half of years the last 32° night comes by February 2 and the first by December 2. Frost and day counts come from NOAA’s station at Sacramento Executive Airport, 7 miles from the town’s center, at about the same height.
The 2023 USDA map puts Clarksburg’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 18 inches of rain a year
January is the wettest month and July the driest. Rain falls on about 63 days a year. Snow is rare: about 0.0" in a normal year at Davis 2 Wsw Exp Farm, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Clarksburg
65% of the work is heating. Months averaging under 55° run from November through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Sacramento Executive Airport.
Living with Clarksburg’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
301 frost-free days in zone 9b. The last frost comes by Feb 2 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 2.
Months with highs of 62–84° and lows of 40° or more: March, April, May, October and November. 1.4 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Clarksburg from natural hazards, drought is the largest share (77%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Clarksburg and similar climates
TownRatings has no climate map of the towns around Clarksburg yet.
Climates most like Clarksburg’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 |
|---|---|---|---|---|
| Clarksburg, CA | 39° | 93° | 18" | 0.0" |
| Corona de Tucson, AZ | 36° | 96° | 14" | 0.1" |
| Big Spring, TX | 33° | 95° | 18" | 2.0" |
| Ashland, OR | 31° | 91° | 19" | 0.5" |
| Chaparral, NM | 31° | 95° | 9" | 0.0" |
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 Clarksburg averaged 1.3° warmer than the 1900s. The biggest change is in January (+1.8°).
A smaller shift than in 57% 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 Clarksburg compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Clarksburg’s place among California’s.
Clarksburg weather by month
Highs, lows and precipitation from NOAA’s grid at Clarksburg’s center; snow, wet days and snow on the ground from Davis 2 Wsw Exp Farm, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 56° | 39° | 3.7" | 0.0" | 12 | 0 | 43° – 51° |
| February | 62° | 41° | 3.6" | 0.0" | 10 | 0 | 48° – 56° |
| March | 67° | 44° | 2.7" | 0.0" | 9 | 0 | 50° – 62° |
| April | 73° | 48° | 1.4" | 0.0" | 5 | 0 | 55° – 65° |
| May | 81° | 53° | 0.8" | 0.0" | 3 | 0 | 60° – 73° |
| June | 88° | 57° | 0.2" | 0.0" | 1 | 0 | 68° – 76° |
| July | 93° | 59° | 0.0" | 0.0" | 0 | 0 | 73° – 80° |
| August | 92° | 59° | 0.0" | 0.0" | 0 | 0 | 72° – 80° |
| September | 89° | 57° | 0.1" | 0.0" | 1 | 0 | 69° – 76° |
| October | 79° | 50° | 0.9" | 0.0" | 3 | 0 | 62° – 70° |
| November | 66° | 43° | 1.8" | 0.0" | 7 | 0 | 48° – 59° |
| December | 56° | 38° | 3.4" | 0.0" | 11 | 0 | 43° – 53° |
| Year | 75° | 49° | 18.4" | 0.0" | 63 | 0 |
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 60° to 73°. September is the most reliable, staying within 7°.
Where Clarksburg’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 Clarksburg’s center.
- Snow: Davis 2 Wsw Exp Farm, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Sacramento Executive Airport, 7 miles from the town’s center, at about the same height; 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 Clarksburg’s climate
What is the weather like in Clarksburg?
A typical July afternoon reaches 93°, a January night drops to 39°, and snow is almost unheard of. Milder January nights than 86% of U.S. towns; hotter July afternoons than 91% of U.S. towns.
How cold does it get in Clarksburg in winter?
December nights average 38°. About 15 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 43°.
How much snow does Clarksburg get?
About 0.0 inches in a normal winter at Davis 2 Wsw Exp Farm, CA, so most winters see none.
How hot does it get in Clarksburg?
July, with a typical high of 93° and a low of 59°. About 76 days a year reach 90° and 14 reach 100° (Sacramento Executive Airport).
When is the first and last frost in Clarksburg?
In half of years the last spring frost (32°) comes by February 2 and the first fall frost by December 2, about 301 frost-free days, at Sacramento Executive Airport.
What growing zone is Clarksburg 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 Clarksburg?
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 Clarksburg getting warmer?
Yes: 1991–2020 averaged 1.3° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 57% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Clarksburg.
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.