Big Stone Colony, MT climate
Big Stone Colony has cold, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 83°, a January night drops to 15°, and about 66 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Big Stone Colony feels like
Winter
Spring
Summer
Fall
Big Stone Colony 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 | 36° | 15° | 0.5" | 9.2" | 7 | 14 | 13° – 36° |
| February | 37° | 15° | 0.6" | 10.1" | 8 | 11 | 0° – 38° |
| March | 46° | 22° | 0.8" | 10.1" | 8 | 8 | 18° – 44° |
| April | 55° | 30° | 1.8" | 9.4" | 10 | 3 | 37° – 47° |
| May | 65° | 39° | 2.7" | 1.9" | 11 | 1 | 47° – 57° |
| June | 73° | 46° | 3.0" | 0.3" | 12 | 0 | 56° – 65° |
| July | 83° | 52° | 1.4" | 0 | 7 | 0 | 58° – 76° |
| August | 83° | 50° | 1.1" | 0.3" | 7 | 0 | 60° – 71° |
| September | 72° | 43° | 1.6" | 0.8" | 7 | 0 | 52° – 63° |
| October | 57° | 33° | 1.2" | 5.2" | 7 | 3 | 36° – 52° |
| November | 44° | 23° | 0.6" | 9.2" | 7 | 8 | 22° – 44° |
| December | 36° | 16° | 0.6" | 9.6" | 7 | 11 | 14° – 35° |
| Year | 57° | 32° | 15.8" | 66.1" | 98 | 60 |
“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 Stone Colony
Big Stone Colony gets 16 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 98 days a year. Snow covers the ground about 60 days of the year.
About 126 frost-free days a year
In half of years the last 32° night comes by May 19 and the first one by September 24. That leaves about 126 frost-free days for gardens, shorter than 96% of U.S. towns.
Heating and cooling a home in Big Stone Colony
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Big Stone Colony, 96% of that work is heating and 4% 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 Stone 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 Stone Colony averaged 1.4° warmer than the 1900s. The biggest change is in January (+5.0°). The shift is larger than in 61% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Big Stone 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 0° to 38°. June is the most reliable, staying within 10°.
Common questions about Big Stone Colony’s climate
What is the coldest month in Big Stone Colony?
January, with a typical high of 36° and a low of 15°.
What is the hottest month in Big Stone Colony?
July, with a typical high of 83° and a low of 52°. About 22 days a year reach 90°.
How much snow does Big Stone Colony get?
About 66 inches in a normal winter, most of it in February.
When is the first frost in Big Stone Colony?
In half of years the first 32° night comes by September 24, and the last spring frost by May 19.
What is the rainiest month in Big Stone Colony?
June, with 3.0 inches of rain and melted snow. The year totals 16 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Big Stone Colony itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Great Falls Intl Airport, MT (10 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.