Miller Colony has cold, snowy winters and pleasant summers, with very little rain
A typical July afternoon reaches 80°, a January night drops to 12°, and about 48 inches of snow falls in a normal winter.
A year in Miller Colony at a glance
Each month’s typical high and low, and what it brings.
What stands out about Miller Colony’s climate
Read from where Miller Colony sits among Montana’s towns. The page puts what stands out first.
Warmer than it used to be
The last 30 years in Miller Colony averaged 1.8° warmer than the 1900s. The biggest change is in January (+5.4°).
A bigger shift than in 86% of U.S. towns.
Change by month
What a year in Miller Colony feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
48 inches of snow, 13 of rain and melt
June is the wettest month and January the driest. Rain or snow falls on about 79 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
About 133 frost-free days a year
In half of years the last 32° night comes by May 16 and the first by September 27.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
Living with Miller Colony’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
133 frost-free days. The last frost comes by May 16 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 27.
About 48" a winter over 17 days with an inch or more, most in March. Snow covers the ground about 54 days a year.
Months averaging under 55° run from September through May. Heating is 97% of the year’s heating-and-cooling load.
About 9 days a year reach 90°, and July afternoons average 80°.
The nicest months are June, July and August.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →How Miller Colony compares
Against every U.S. town on TownTapestry, each counted once, with its place in Montana.
Miller 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° | 12° | 0.4" | 6.4" | 5 | 13 | 11° – 34° |
| February | 37° | 13° | 0.5" | 7.6" | 6 | 10 | 2° – 36° |
| March | 45° | 20° | 0.6" | 8.1" | 6 | 7 | 16° – 41° |
| April | 53° | 28° | 1.3" | 6.6" | 8 | 3 | 35° – 46° |
| May | 63° | 36° | 2.2" | 1.4" | 9 | 0 | 45° – 55° |
| June | 70° | 44° | 2.8" | 0 | 11 | 0 | 54° – 63° |
| July | 80° | 49° | 1.1" | 0 | 6 | 0 | 55° – 71° |
| August | 80° | 47° | 1.1" | 0 | 7 | 0 | 58° – 67° |
| September | 70° | 39° | 1.2" | 0.9" | 6 | 0 | 51° – 60° |
| October | 56° | 30° | 0.9" | 4.2" | 6 | 3 | 35° – 49° |
| November | 43° | 20° | 0.5" | 6.9" | 5 | 8 | 21° – 40° |
| December | 36° | 13° | 0.4" | 5.4" | 5 | 11 | 13° – 33° |
| Year | 56° | 29° | 12.9" | 47.5" | 79 | 54 |
Heating and cooling a home in Miller Colony
97% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 2° to 36°. June is the most reliable, staying within 9°.
Common questions about Miller Colony’s climate
What is the coldest month in Miller Colony?
January, with a typical high of 36° and a low of 12°.
What is the hottest month in Miller Colony?
July, with a typical high of 80° and a low of 49°. About 9 days a year reach 90°.
How much snow does Miller Colony get?
About 48 inches in a normal winter, most of it in March.
When is the first frost in Miller Colony?
In half of years the first 32° night comes by September 27, and the last spring frost by May 16.
What is the rainiest month in Miller Colony?
June, with 2.8 inches of rain and melted snow. The year totals 13 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Miller Colony.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Miller Colony itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Choteau, MT (9 mi, snow) and Bynum 4 Sse, 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. Today’s forecast: National Weather Service.