Clay has mild winters and hot summers, with very little rain
A typical July afternoon reaches 94°, a January night drops to 39°, and snow is almost unheard of.
A year in Clay at a glance
Each month’s typical high and low, and what it brings.
What stands out about Clay’s climate
Read from where Clay sits among California’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Clay averaged 1.2° warmer than the 1900s. The biggest change is in January (+1.9°).
A smaller shift than in 52% of U.S. towns.
Change by month
A year-round growing season
Freezing nights are uncommon in Clay.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
What a year in Clay feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Rain and snow in Clay
January is the wettest month and July the driest. Rain or snow falls on about 54 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
No measurable snow in a normal year.
Living with Clay’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
Only 88% of years see a freezing night, so tender plants can stay out most winters.
About 0.0" in a normal winter.
Months averaging under 55° run from November through February. Heating is 61% of the year’s heating-and-cooling load.
About 87 days a year reach 90°, and July afternoons average 94°.
The nicest months are March, April, May, October and November. 1.0 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 →How Clay compares
Against every U.S. town on TownTapestry, each counted once, with its place in California.
Clay 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 | 56° | 39° | 3.7" | 0 | 10 | 0 | 43° – 53° |
| February | 62° | 42° | 3.6" | 0 | 9 | 0 | 47° – 56° |
| March | 67° | 44° | 2.9" | 0 | 8 | 0 | 50° – 61° |
| April | 72° | 47° | 1.7" | 0 | 5 | 0 | 55° – 64° |
| May | 81° | 52° | 0.9" | 0 | 3 | 0 | 58° – 74° |
| June | 89° | 57° | 0.2" | 0 | 1 | 0 | 68° – 77° |
| July | 94° | 60° | 0.0" | 0 | 0 | 0 | 74° – 81° |
| August | 93° | 60° | 0.0" | 0 | 0 | 0 | 73° – 81° |
| September | 89° | 57° | 0.1" | 0 | 1 | 0 | 69° – 77° |
| October | 79° | 51° | 0.9" | 0 | 3 | 0 | 61° – 70° |
| November | 66° | 43° | 2.0" | 0 | 6 | 0 | 48° – 59° |
| December | 56° | 39° | 3.3" | 0 | 9 | 0 | 44° – 52° |
| Year | 75° | 49° | 19.2" | 0.0" | 54 | 0 |
Heating and cooling a home in Clay
61% of the work is heating.
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 58° to 74°. September is the most reliable, staying within 8°.
Common questions about Clay’s climate
What is the coldest month in Clay?
December, with a typical high of 56° and a low of 39°.
What is the hottest month in Clay?
July, with a typical high of 94° and a low of 60°. About 87 days a year reach 90°.
How much snow does Clay get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Clay?
Frost is uncommon. Only 88% of years see a night at 32° or below.
What is the rainiest month in Clay?
January, with 3.7 inches of rain and melted snow. The year totals 19 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Clay.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Clay itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Acampo 5ne, CA (7 mi, snow) and Camp Pardee, CA (18 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.