Four Corners, MT climate
Four Corners has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 84°, a January night drops to 14°, and about 91 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Four Corners feels like
Winter
Spring
Summer
Fall
Four Corners 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 | 34° | 14° | 0.5" | 12.7" | 11 | 30 | 15° – 31° |
| February | 37° | 16° | 0.5" | 13.0" | 10 | 24 | 12° – 36° |
| March | 47° | 23° | 0.9" | 13.1" | 12 | 16 | 22° – 42° |
| April | 55° | 30° | 1.8" | 12.9" | 14 | 4 | 37° – 47° |
| May | 65° | 38° | 2.4" | 3.6" | 15 | 0 | 47° – 55° |
| June | 73° | 45° | 2.8" | 0.8" | 15 | 0 | 53° – 65° |
| July | 84° | 50° | 1.2" | 0 | 10 | 0 | 57° – 74° |
| August | 83° | 48° | 1.1" | 0.1" | 10 | 0 | 59° – 70° |
| September | 73° | 41° | 1.3" | 0.4" | 9 | 0 | 53° – 62° |
| October | 58° | 31° | 1.4" | 6.0" | 11 | 3 | 36° – 50° |
| November | 43° | 21° | 0.8" | 12.5" | 10 | 15 | 21° – 41° |
| December | 33° | 13° | 0.6" | 16.2" | 11 | 26 | 15° – 29° |
| Year | 57° | 31° | 15.1" | 91.3" | 138 | 118 |
“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 Four Corners
Four Corners gets 15 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 138 days a year. Snow covers the ground about 118 days of the year.
About 123 frost-free days a year
In half of years the last 32° night comes by May 23 and the first one by September 23. That leaves about 123 frost-free days for gardens, shorter than 97% of U.S. towns.
Heating and cooling a home in Four Corners
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Four Corners, 97% of that work is heating and 3% 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 Four Corners 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 Four Corners averaged 1.7° warmer than the 1900s. The biggest change is in January (+4.3°). The shift is larger than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Four Corners’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 12° to 36°. May is the most reliable, staying within 9°.
Common questions about Four Corners’s climate
What is the coldest month in Four Corners?
December, with a typical high of 33° and a low of 13°.
What is the hottest month in Four Corners?
July, with a typical high of 84° and a low of 50°. About 13 days a year reach 90°.
How much snow does Four Corners get?
About 91 inches in a normal winter, most of it in December.
When is the first frost in Four Corners?
In half of years the first 32° night comes by September 23, and the last spring frost by May 23.
What is the rainiest month in Four Corners?
June, with 2.8 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Four Corners itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Bozeman Montana State Univ, MT (6 mi, snow) and Bozeman 6 W Exp Farm, MT (1 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.