Cohasset, CA climate
Cohasset has mild winters and hot summers, with plenty of rain. A typical July afternoon reaches 93°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cohasset feels like
Winter
Spring
Summer
Fall
Cohasset 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 | 55° | 39° | 9.8" | 0 | 12 | 0 | 43° – 56° |
| February | 57° | 40° | 9.2" | 0.1" | 11 | 0 | 41° – 55° |
| March | 61° | 41° | 8.5" | 0 | 11 | 0 | 43° – 59° |
| April | 67° | 44° | 4.7" | 0 | 8 | 0 | 49° – 60° |
| May | 76° | 51° | 2.6" | 0 | 6 | 0 | 54° – 71° |
| June | 85° | 58° | 0.9" | 0 | 3 | 0 | 66° – 78° |
| July | 93° | 64° | 0.0" | 0 | 0 | 0 | 74° – 82° |
| August | 92° | 63° | 0.1" | 0 | 1 | 0 | 74° – 81° |
| September | 87° | 60° | 0.3" | 0 | 1 | 0 | 69° – 78° |
| October | 75° | 53° | 3.1" | 0 | 5 | 0 | 60° – 71° |
| November | 61° | 43° | 5.7" | 0 | 9 | 0 | 44° – 58° |
| December | 54° | 38° | 10.0" | 0 | 12 | 0 | 42° – 50° |
| Year | 72° | 50° | 55.1" | 0.1" | 78 | 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 Cohasset
Cohasset gets 55 inches of rain and melted snow a year. December is the wettest month and July the driest. Rain or snow falls on about 78 days a year.
About 313 frost-free days a year
In half of years the last 32° night comes by February 7 and the first one by December 18. That leaves about 313 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Cohasset
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cohasset, 64% of that work is heating and 36% 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 Cohasset 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 Cohasset averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.2°). The shift is smaller than in 52% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cohasset’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°. August is the most reliable, staying within 7°.
Common questions about Cohasset’s climate
What is the coldest month in Cohasset?
December, with a typical high of 54° and a low of 38°.
What is the hottest month in Cohasset?
July, with a typical high of 93° and a low of 64°. About 66 days a year reach 90°.
How much snow does Cohasset get?
Almost none. A normal year brings 0.1 inches.
When is the first frost in Cohasset?
In half of years the first 32° night comes by December 18, and the last spring frost by February 7.
What is the rainiest month in Cohasset?
December, with 10.0 inches of rain and melted snow. The year totals 55 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cohasset itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Paradise, CA (12 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.