Roscoe, MT climate
Roscoe has chilly, snowy winters and pleasant summers, with very little rain. A typical July afternoon reaches 82°, a January night drops to 17°, and about 72 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Roscoe feels like
Winter
Spring
Summer
Fall
Roscoe 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 | 30-yr range |
|---|---|---|---|---|---|---|
| January | 37° | 17° | 0.6" | 9.6" | 4 | 19° – 33° |
| February | 38° | 17° | 0.7" | 15.1" | 5 | 13° – 37° |
| March | 47° | 24° | 1.1" | 13.7" | 6 | 26° – 42° |
| April | 53° | 30° | 2.0" | 8.8" | 7 | 36° – 46° |
| May | 63° | 38° | 3.6" | 1.6" | 9 | 46° – 55° |
| June | 72° | 46° | 2.8" | 0 | 10 | 53° – 64° |
| July | 82° | 52° | 1.6" | 0 | 7 | 56° – 74° |
| August | 81° | 51° | 1.2" | 0 | 6 | 60° – 71° |
| September | 71° | 43° | 1.5" | 0.5" | 6 | 53° – 62° |
| October | 57° | 33° | 1.8" | 4.7" | 5 | 36° – 51° |
| November | 44° | 24° | 0.9" | 7.4" | 4 | 26° – 44° |
| December | 36° | 17° | 0.7" | 10.8" | 4 | 18° – 33° |
| Year | 57° | 33° | 18.3" | 72.2" | 72 |
“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 Roscoe
Roscoe gets 18 inches of rain and melted snow a year. May is the wettest month and January the driest. Rain or snow falls on about 72 days a year.
About 100 frost-free days a year
In half of years the last 32° night comes by June 1 and the first one by September 11. That leaves about 100 frost-free days for gardens, shorter than 99% of U.S. towns.
Heating and cooling a home in Roscoe
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Roscoe, 98% of that work is heating and 2% 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 Roscoe 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 Roscoe averaged 1.6° warmer than the 1900s. The biggest change is in January (+4.4°). The shift is larger than in 77% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Roscoe’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 13° to 37°. May is the most reliable, staying within 9°.
Common questions about Roscoe’s climate
What is the coldest month in Roscoe?
December, with a typical high of 36° and a low of 17°.
What is the hottest month in Roscoe?
July, with a typical high of 82° and a low of 52°. About 18 days a year reach 90°.
How much snow does Roscoe get?
About 72 inches in a normal winter, most of it in February.
When is the first frost in Roscoe?
In half of years the first 32° night comes by September 11, and the last spring frost by June 1.
What is the rainiest month in Roscoe?
May, with 3.6 inches of rain and melted snow. The year totals 18 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Roscoe itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Fishtail, MT (7 mi, snow) and Nye #2, MT (16 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.