Greenville, CA climate
Greenville has chilly, snowy winters and warm summers. A typical July afternoon reaches 90°, a January night drops to 25°, and about 109 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Greenville feels like
Winter
Spring
Summer
Fall
Greenville 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 | 45° | 25° | 6.5" | 28.5" | 11 | 22 | 28° – 41° |
| February | 50° | 27° | 6.5" | 22.3" | 11 | 20 | 32° – 45° |
| March | 56° | 30° | 5.6" | 17.1" | 11 | 19 | 36° – 50° |
| April | 63° | 33° | 3.0" | 7.3" | 9 | 5 | 41° – 52° |
| May | 72° | 40° | 2.0" | 0.5" | 7 | 0 | 47° – 63° |
| June | 82° | 45° | 0.8" | 0.1" | 3 | 0 | 58° – 70° |
| July | 90° | 50° | 0.2" | 0 | 1 | 0 | 65° – 75° |
| August | 89° | 48° | 0.2" | 0 | 1 | 0 | 65° – 73° |
| September | 83° | 43° | 0.4" | 0 | 2 | 0 | 59° – 67° |
| October | 70° | 35° | 1.9" | 0.8" | 5 | 0 | 48° – 57° |
| November | 54° | 29° | 3.6" | 7.1" | 8 | 4 | 34° – 47° |
| December | 44° | 25° | 6.9" | 25.6" | 12 | 18 | 31° – 38° |
| Year | 67° | 36° | 37.5" | 109.3" | 81 | 88 |
“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 Greenville
Greenville gets 37 inches of rain and melted snow a year. December is the wettest month and August the driest. Rain or snow falls on about 81 days a year. Snow covers the ground about 88 days of the year.
About 143 frost-free days a year
In half of years the last 32° night comes by May 18 and the first one by October 8. That leaves about 143 frost-free days for gardens, shorter than 87% of U.S. towns.
Heating and cooling a home in Greenville
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Greenville, 96% of that work is heating and 4% is cooling, so the furnace matters far more than the air conditioner.
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 Greenville 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 Greenville averaged 1.2° warmer than the 1900s. The biggest change is in January (+2.2°). The shift is smaller than in 56% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Greenville’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 47° to 63°. December is the most reliable, staying within 7°.
Common questions about Greenville’s climate
What is the coldest month in Greenville?
December, with a typical high of 44° and a low of 25°.
What is the hottest month in Greenville?
July, with a typical high of 90° and a low of 50°. About 18 days a year reach 90°.
How much snow does Greenville get?
About 109 inches in a normal winter, most of it in January.
When is the first frost in Greenville?
In half of years the first 32° night comes by October 8, and the last spring frost by May 18.
What is the rainiest month in Greenville?
December, with 6.9 inches of rain and melted snow. The year totals 37 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Greenville itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Canyon Dam, CA (8 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.