More precipitation falls on Cohasset than on 94% of U.S. towns: 55 inches a year
Midwinter brings lows of about 39°. From frosty January to warm July, readings climb 55°. By July afternoons alone, it runs hotter than 91% of U.S. towns. Radiators earn their keep from December to February, the months that average under 50°.
A year in Cohasset at a glance
Each month’s typical high and low, and what it brings.
What stands out about Cohasset’s climate
Compared with towns across the U.S., with Cohasset’s place in California beside it.
What a year in Cohasset feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 313 frost-free days a year
In half of years the last 32° night comes by February 7 and the first by December 18. Frost and day counts come from NOAA’s station at Paradise, CA, 12 miles from the town’s center, 310 ft lower.
The 2023 USDA map puts Cohasset’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 55 inches of rain a year
December is the wettest month and July the driest. Rain falls on about 78 days a year. Snow is rare: about 0.1" in a normal year at Paradise, CA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Cohasset
64% 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 Paradise, CA.
Living with Cohasset’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
313 frost-free days in zone 9b. The last frost comes by Feb 7 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 18.
Months with highs of 62–84° and lows of 40° or more: April, May and October. 4.7 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Cohasset from natural hazards, river flooding is the largest share (54%); heat waves, cold waves, winter storms and ice storms together are 1%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Cohasset and similar climates
TownRatings has no climate map of the towns around Cohasset yet.
Climates most like Cohasset’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 |
|---|---|---|---|---|
| Cohasset, CA | 39° | 93° | 55" | 0.1" |
| Marianna, FL | 40° | 92° | 55" | 0.0" |
| Jasper, TX | 39° | 93° | 57" | 0.1" |
| Tallulah, LA | 37° | 92° | 57" | 0.3" |
| Dothan, AL | 39° | 92° | 56" | 0.1" |
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 Cohasset averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.2°).
A smaller shift than in 62% 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 Cohasset compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Cohasset’s place among California’s.
Cohasset weather by month
Highs, lows and precipitation from NOAA’s grid at Cohasset’s center; snow, wet days and snow on the ground from Paradise, CA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 55° | 39° | 9.8" | 0.0" | 12 | 0 | 43° – 56° |
| February | 57° | 40° | 9.2" | 0.1" | 11 | 0 | 41° – 55° |
| March | 61° | 41° | 8.5" | 0.0" | 11 | 0 | 43° – 59° |
| April | 67° | 44° | 4.7" | 0.0" | 8 | 0 | 49° – 60° |
| May | 76° | 51° | 2.6" | 0.0" | 6 | 0 | 54° – 71° |
| June | 85° | 58° | 0.9" | 0.0" | 3 | 0 | 66° – 78° |
| July | 93° | 64° | 0.0" | 0.0" | 0 | 0 | 74° – 82° |
| August | 92° | 63° | 0.1" | 0.0" | 1 | 0 | 74° – 81° |
| September | 87° | 60° | 0.3" | 0.0" | 1 | 0 | 69° – 78° |
| October | 75° | 53° | 3.1" | 0.0" | 5 | 0 | 60° – 71° |
| November | 61° | 43° | 5.7" | 0.0" | 9 | 0 | 44° – 58° |
| December | 54° | 38° | 10.0" | 0.0" | 12 | 0 | 42° – 50° |
| Year | 72° | 50° | 55.0" | 0.1" | 78 | 0 |
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°. August is the most reliable, staying within 7°.
Where Cohasset’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 Cohasset’s center.
- Snow: Paradise, CA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Paradise, CA, 12 miles from the town’s center, 310 ft lower; 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 Cohasset’s climate
What is the weather like in Cohasset?
A typical July afternoon reaches 93°, a January night drops to 39°, and snow is almost unheard of. Milder January nights than 88% of U.S. towns; hotter July afternoons than 91% of U.S. towns.
How cold does it get in Cohasset in winter?
December nights average 38°. About 7 nights a year reach 32° or below. In the coldest December of the last 30 years the month averaged 42°.
How much snow does Cohasset get?
About 0.1 inches in a normal winter at Paradise, CA, so most winters see none.
How hot does it get in Cohasset?
July, with a typical high of 93° and a low of 64°. About 66 days a year reach 90° and 9 reach 100° (Paradise, CA).
When is the first and last frost in Cohasset?
In half of years the last spring frost (32°) comes by February 7 and the first fall frost by December 18, about 313 frost-free days, at Paradise, CA.
What growing zone is Cohasset 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 Cohasset?
By one simple rule (highs of 62–84° and lows of 40° or more), April, May and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Cohasset getting warmer?
Yes: 1991–2020 averaged 1.2° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 62% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Cohasset.
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.