Flat Willow Colony, MT climate
Flat Willow Colony has cold, snowy winters and warm summers, with very little rain. A typical July afternoon reaches 85°, a January night drops to 13°, and about 43 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Flat Willow Colony feels like
Winter
Spring
Summer
Fall
Flat Willow 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° | 13° | 0.5" | 10.4" | 4 | 15 | 14° – 37° |
| February | 39° | 15° | 0.5" | 9.0" | 4 | 10 | 4° – 39° |
| March | 48° | 23° | 0.7" | 4.7" | 6 | 6 | 20° – 45° |
| April | 57° | 31° | 1.6" | 4.2" | 7 | 2 | 38° – 48° |
| May | 66° | 40° | 2.9" | 0.2" | 9 | 0 | 48° – 57° |
| June | 75° | 49° | 3.0" | 0 | 9 | 0 | 57° – 67° |
| July | 85° | 55° | 1.5" | 0 | 6 | 0 | 60° – 77° |
| August | 85° | 53° | 1.2" | 0 | 5 | 0 | 62° – 74° |
| September | 74° | 44° | 1.2" | 0 | 5 | 0 | 54° – 65° |
| October | 59° | 33° | 1.1" | 2.3" | 5 | 1 | 38° – 51° |
| November | 45° | 23° | 0.6" | 3.8" | 4 | 5 | 23° – 43° |
| December | 37° | 15° | 0.5" | 8.8" | 4 | 13 | 15° – 35° |
| Year | 59° | 33° | 15.2" | 43.4" | 70 | 51 |
“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 Flat Willow Colony
Flat Willow Colony gets 15 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 70 days a year. Snow covers the ground about 51 days of the year.
About 132 frost-free days a year
In half of years the last 32° night comes by May 16 and the first one by September 28. That leaves about 132 frost-free days for gardens, shorter than 94% of U.S. towns.
Heating and cooling a home in Flat Willow Colony
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Flat Willow Colony, 94% of that work is heating and 6% 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 Flat Willow 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 Flat Willow Colony averaged 1.4° warmer than the 1900s. The biggest change is in January (+4.4°). The shift is larger than in 65% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Flat Willow 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 4° to 39°. May is the most reliable, staying within 9°.
Common questions about Flat Willow Colony’s climate
What is the coldest month in Flat Willow Colony?
January, with a typical high of 36° and a low of 13°.
What is the hottest month in Flat Willow Colony?
July, with a typical high of 85° and a low of 55°. About 35 days a year reach 90°.
How much snow does Flat Willow Colony get?
About 43 inches in a normal winter, most of it in January.
When is the first frost in Flat Willow Colony?
In half of years the first 32° night comes by September 28, and the last spring frost by May 16.
What is the rainiest month in Flat Willow Colony?
June, with 3.0 inches of rain and melted snow. The year totals 15 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Flat Willow Colony itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Flatwillow 4 Ene, MT (9 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.