Twin Creeks, MT climate
Twin Creeks has chilly, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 81°, a January night drops to 17°, and about 43 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Twin Creeks feels like
Winter
Spring
Summer
Fall
Twin Creeks 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 | 32° | 17° | 1.7" | 9.9" | 13 | 20 | 15° – 32° |
| February | 36° | 18° | 1.5" | 8.5" | 11 | 14 | 14° – 34° |
| March | 46° | 24° | 1.2" | 5.0" | 11 | 5 | 27° – 41° |
| April | 53° | 30° | 1.5" | 1.3" | 11 | 0 | 37° – 48° |
| May | 63° | 36° | 2.0" | 0.3" | 12 | 0 | 45° – 55° |
| June | 71° | 43° | 2.2" | 0 | 13 | 0 | 53° – 66° |
| July | 81° | 48° | 0.9" | 0 | 6 | 0 | 55° – 73° |
| August | 81° | 46° | 1.0" | 0 | 6 | 0 | 58° – 67° |
| September | 70° | 39° | 1.1" | 0.1" | 7 | 0 | 51° – 60° |
| October | 54° | 31° | 1.7" | 0.9" | 10 | 1 | 35° – 49° |
| November | 39° | 24° | 1.9" | 5.4" | 11 | 5 | 25° – 38° |
| December | 31° | 17° | 1.8" | 11.6" | 13 | 16 | 17° – 29° |
| Year | 55° | 31° | 18.3" | 43.0" | 124 | 61 |
“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 Twin Creeks
Twin Creeks gets 18 inches of rain and melted snow a year. June is the wettest month and July the driest. Rain or snow falls on about 124 days a year. Snow covers the ground about 61 days of the year.
About 130 frost-free days a year
In half of years the last 32° night comes by May 16 and the first one by September 26. That leaves about 130 frost-free days for gardens, shorter than 95% of U.S. towns.
Heating and cooling a home in Twin Creeks
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Twin Creeks, 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 Twin Creeks 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 Twin Creeks averaged 1.3° warmer than the 1900s. The biggest change is in January (+3.8°). The shift is larger than in 53% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Twin Creeks’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 14° to 34°. September is the most reliable, staying within 9°.
Common questions about Twin Creeks’s climate
What is the coldest month in Twin Creeks?
December, with a typical high of 31° and a low of 17°.
What is the hottest month in Twin Creeks?
July, with a typical high of 81° and a low of 48°. About 27 days a year reach 90°.
How much snow does Twin Creeks get?
About 43 inches in a normal winter, most of it in December.
When is the first frost in Twin Creeks?
In half of years the first 32° night comes by September 26, and the last spring frost by May 16.
What is the rainiest month in Twin Creeks?
June, with 2.2 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Twin Creeks itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Missoula Intl Airport, MT (17 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.