Fall River Mills has chilly winters and warm summers, with very little rain
A typical July afternoon reaches 90°, a January night drops to 26°, and about 3 inches of snow falls in a normal winter.
A year in Fall River Mills at a glance
Each month’s typical high and low, and what it brings.
What stands out about Fall River Mills’s climate
Read from where Fall River Mills sits among California’s towns. The page puts what stands out first.
Living with Fall River Mills’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
113 frost-free days. The last frost comes by May 29 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 19.
About 3" in a normal winter.
Months averaging under 55° run from October through April. Heating is 94% of the year’s heating-and-cooling load.
About 61 days a year reach 90°, and July afternoons average 90°.
The nicest months are May, June and September. 1.1 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →About 113 frost-free days a year
In half of years the last 32° night comes by May 29 and the first by September 19.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
3 inches of snow, 22 of rain and melt
December is the wettest month and July the driest. Rain or snow falls on about 57 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
What a year in Fall River Mills feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Warmer than it used to be
The last 30 years in Fall River Mills averaged 1.4° warmer than the 1900s. The biggest change is in January (+2.7°).
A bigger shift than in 64% of U.S. towns.
Change by month
How Fall River Mills compares
Against every U.S. town on TownTapestry, each counted once, with its place in California.
Fall River Mills 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 | 46° | 26° | 3.4" | 0.4" | 7 | 0 | 28° – 42° |
| February | 50° | 28° | 3.1" | 1.2" | 8 | 0 | 33° – 46° |
| March | 56° | 31° | 2.9" | 0.9" | 8 | 0 | 36° – 50° |
| April | 62° | 35° | 2.0" | 0.1" | 6 | 0 | 43° – 54° |
| May | 72° | 41° | 1.8" | 0 | 5 | 0 | 47° – 63° |
| June | 81° | 47° | 0.8" | 0 | 3 | 0 | 59° – 72° |
| July | 90° | 53° | 0.2" | 0 | 1 | 0 | 65° – 76° |
| August | 89° | 51° | 0.2" | 0 | 1 | 0 | 66° – 75° |
| September | 83° | 45° | 0.4" | 0 | 2 | 0 | 60° – 68° |
| October | 70° | 36° | 1.3" | 0 | 4 | 0 | 49° – 58° |
| November | 54° | 30° | 2.3" | 0.3" | 7 | 0 | 33° – 48° |
| December | 45° | 26° | 3.4" | 0.1" | 7 | 0 | 31° – 40° |
| Year | 66° | 37° | 21.6" | 3.0" | 57 | 1 |
Heating and cooling a home in Fall River Mills
94% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. May swings the most: from 1991 to 2020 its average ranged from 47° to 63°. August is the most reliable, staying within 9°.
Common questions about Fall River Mills’s climate
What is the coldest month in Fall River Mills?
December, with a typical high of 45° and a low of 26°.
What is the hottest month in Fall River Mills?
July, with a typical high of 90° and a low of 53°. About 61 days a year reach 90°.
How much snow does Fall River Mills get?
About 3 inches in a normal winter, most of it in February.
When is the first frost in Fall River Mills?
In half of years the first 32° night comes by September 19, and the last spring frost by May 29.
What is the rainiest month in Fall River Mills?
December, with 3.4 inches of rain and melted snow. The year totals 22 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Fall River Mills.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Fall River Mills itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Fall Rvr Mills, CA (1 mi, snow) and Hat Creek, CA (7 mi, frost, heat and degree days). Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.