Hilmar-Irwin, CA climate
Hilmar-Irwin has mild winters and hot summers, with very little rain. A typical July afternoon reaches 95°, a January night drops to 39°, and snow is almost unheard of.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Hilmar-Irwin feels like
Winter
Spring
Summer
Fall
Hilmar-Irwin 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° | 2.5" | 0 | 10 | 0 | 43° – 52° |
| February | 62° | 42° | 2.2" | 0 | 10 | 0 | 48° – 55° |
| March | 68° | 45° | 1.9" | 0 | 9 | 0 | 50° – 62° |
| April | 74° | 48° | 0.9" | 0 | 5 | 0 | 56° – 65° |
| May | 82° | 53° | 0.5" | 0 | 3 | 0 | 61° – 74° |
| June | 90° | 59° | 0.1" | 0 | 1 | 0 | 70° – 77° |
| July | 95° | 63° | 0.0" | 0 | 0 | 0 | 75° – 83° |
| August | 94° | 62° | 0.0" | 0 | 0 | 0 | 74° – 81° |
| September | 90° | 59° | 0.0" | 0 | 1 | 0 | 71° – 77° |
| October | 80° | 51° | 0.6" | 0 | 3 | 0 | 62° – 70° |
| November | 66° | 43° | 1.0" | 0 | 6 | 0 | 48° – 59° |
| December | 56° | 39° | 2.1" | 0 | 10 | 0 | 43° – 52° |
| Year | 76° | 50° | 11.9" | 0.0" | 57 | 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 Hilmar-Irwin
Hilmar-Irwin gets 12 inches of rain and melted snow a year. January is the wettest month and July the driest. Rain or snow falls on about 57 days a year.
A year-round growing season
Heating and cooling a home in Hilmar-Irwin
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Hilmar-Irwin, 54% of that work is heating and 46% 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 Hilmar-Irwin 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 Hilmar-Irwin averaged 1.6° warmer than the 1900s. The biggest change is in January (+2.3°). The shift is larger than in 74% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Hilmar-Irwin’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 61° to 74°. September is the most reliable, staying within 6°.
Common questions about Hilmar-Irwin’s climate
What is the coldest month in Hilmar-Irwin?
December, with a typical high of 56° and a low of 39°.
What is the hottest month in Hilmar-Irwin?
July, with a typical high of 95° and a low of 63°. About 80 days a year reach 90°.
How much snow does Hilmar-Irwin get?
Almost none. A normal year brings 0.0 inches.
When is the first frost in Hilmar-Irwin?
Frost is uncommon. Only 68% of years see a night at 32° or below.
What is the rainiest month in Hilmar-Irwin?
January, with 2.5 inches of rain and melted snow. The year totals 12 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Hilmar-Irwin itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Turlock #2, CA (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.