Thermal, CA climate
Thermal has warm winters and scorching summers, with very little rain. A typical July afternoon reaches 107°, a January night drops to 43°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Thermal feels like
Winter
Spring
Summer
Fall
Thermal 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 | 71° | 43° | 0.6" | 0 | 3 | 0 | 53° – 63° |
| February | 74° | 47° | 0.6" | 0 | 3 | 0 | 55° – 66° |
| March | 81° | 53° | 0.3" | 0 | 2 | 0 | 60° – 73° |
| April | 87° | 59° | 0.1" | 0 | 1 | 0 | 67° – 77° |
| May | 95° | 66° | 0.0" | 0 | 0 | 0 | 75° – 85° |
| June | 103° | 73° | 0.0" | 0 | 0 | 0 | 83° – 92° |
| July | 107° | 79° | 0.1" | 0 | 1 | 0 | 88° – 97° |
| August | 107° | 79° | 0.1" | 0 | 1 | 0 | 89° – 96° |
| September | 102° | 73° | 0.2" | 0 | 1 | 0 | 85° – 90° |
| October | 91° | 62° | 0.2" | 0 | 1 | 0 | 73° – 81° |
| November | 79° | 50° | 0.2" | 0 | 1 | 0 | 56° – 69° |
| December | 69° | 42° | 0.4" | 0 | 2 | 0 | 52° – 59° |
| Year | 89° | 60° | 2.7" | 0.0" | 15 | 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 Thermal
Thermal gets 3 inches of rain and melted snow a year. January is the wettest month and June the driest. Rain or snow falls on about 15 days a year.
About 298 frost-free days a year
In half of years the last 32° night comes by February 7 and the first one by December 2. That leaves about 298 frost-free days for gardens, longer than 95% of U.S. towns.
Heating and cooling a home in Thermal
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Thermal, 22% of that work is heating and 78% is cooling, so air conditioning is the bigger bill.
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.
Thermal and its neighbors
Thermal borders 1 town with climate data. January nights across them vary by 0.1°. Coachella has both the coldest January nights (43°) and the hottest July afternoons (107°). Thermal’s January low is 43° and its July high 107°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Thermal 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 Thermal averaged 1.8° warmer than the 1900s. The biggest change is in January (+2.6°). The shift is larger than in 88% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Thermal’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. November swings the most: between 1991 and 2020 its average temperature ranged from 56° to 69°. September is the most reliable, staying within 5°.
Common questions about Thermal’s climate
What is the coldest month in Thermal?
December, with a typical high of 69° and a low of 42°.
What is the hottest month in Thermal?
July, with a typical high of 107° and a low of 79°. About 187 days a year reach 90°.
How much snow does Thermal get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Thermal?
In half of years the first 32° night comes by December 2, and the last spring frost by February 7.
What is the rainiest month in Thermal?
January, with 0.6 inches of rain and melted snow. The year totals 3 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Thermal itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Desert Resorts Rgnl Airport, CA (2 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.