Big Sky Colony, MT climate
Big Sky Colony has cold winters and pleasant summers, with very little rain. A typical July afternoon reaches 77°, a January night drops to 12°.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Big Sky Colony feels like
Winter
Spring
Summer
Fall
Big Sky Colony weather by month
Average highs, lows, rain and snow for every month, from NOAA’s 1991–2020 normals.
| Month | High | Low | Rain + melt | 30-yr range |
|---|---|---|---|---|
| January | 32° | 12° | 0.6" | 8° – 33° |
| February | 33° | 12° | 0.6" | -2° – 35° |
| March | 40° | 19° | 0.8" | 12° – 38° |
| April | 50° | 27° | 1.2" | 33° – 45° |
| May | 60° | 36° | 2.0" | 42° – 54° |
| June | 67° | 43° | 3.2" | 52° – 60° |
| July | 77° | 48° | 1.3" | 53° – 70° |
| August | 76° | 46° | 1.3" | 55° – 65° |
| September | 66° | 39° | 1.3" | 49° – 58° |
| October | 53° | 30° | 1.0" | 34° – 49° |
| November | 39° | 20° | 0.8" | 17° – 39° |
| December | 32° | 13° | 0.6" | 10° – 32° |
| Year | 52° | 29° | 14.5" |
“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 Big Sky Colony
Big Sky Colony gets 15 inches of rain and melted snow a year. June is the wettest month and January the driest.
About 110 frost-free days a year
In half of years the last 32° night comes by May 28 and the first one by September 16. That leaves about 110 frost-free days for gardens, shorter than 98% of U.S. towns.
Heating and cooling a home in Big Sky Colony
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Big Sky Colony, 99% of that work is heating and 1% 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 Big Sky Colony 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 Big Sky Colony averaged 1.8° warmer than the 1900s. The biggest change is in January (+5.4°). The shift is larger than in 85% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Big Sky Colony’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 -2° to 35°. June is the most reliable, staying within 8°.
Common questions about Big Sky Colony’s climate
What is the coldest month in Big Sky Colony?
January, with a typical high of 32° and a low of 12°.
What is the hottest month in Big Sky Colony?
July, with a typical high of 77° and a low of 48°. About 6 days a year reach 90°.
When is the first frost in Big Sky Colony?
In half of years the first 32° night comes by September 16, and the last spring frost by May 28.
What is the rainiest month in Big Sky Colony?
June, with 3.2 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Big Sky Colony itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Del Bonita, MT (11 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.