Judith Gap, MT climate
Judith Gap has cold winters and pleasant summers, with very little rain. A typical July afternoon reaches 81°, a January night drops to 13°, and about 28 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Judith Gap feels like
Winter
Spring
Summer
Fall
Judith Gap 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 | 37° | 13° | 0.5" | 4.5" | 3 | 10 | 16° – 33° |
| February | 38° | 13° | 0.4" | 6.7" | 3 | 7 | 8° – 36° |
| March | 46° | 21° | 0.7" | 3.6" | 4 | 3 | 22° – 40° |
| April | 53° | 27° | 1.6" | 2.8" | 8 | 1 | 35° – 45° |
| May | 63° | 36° | 2.8" | 0.4" | 10 | 0 | 45° – 54° |
| June | 72° | 43° | 3.0" | 0 | 10 | 0 | 53° – 63° |
| July | 81° | 49° | 1.7" | 0 | 8 | 0 | 56° – 73° |
| August | 81° | 47° | 1.5" | 0 | 7 | 0 | 58° – 69° |
| September | 71° | 39° | 1.3" | 0.2" | 5 | 0 | 51° – 61° |
| October | 57° | 29° | 1.0" | 1.8" | 5 | 2 | 34° – 49° |
| November | 44° | 20° | 0.5" | 3.7" | 3 | 4 | 24° – 41° |
| December | 36° | 13° | 0.5" | 3.8" | 3 | 7 | 16° – 32° |
| Year | 57° | 29° | 15.2" | 27.5" | 68 | 34 |
“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 Judith Gap
Judith Gap 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 68 days a year. Snow covers the ground about 34 days of the year.
About 104 frost-free days a year
In half of years the last 32° night comes by June 1 and the first one by September 15. That leaves about 104 frost-free days for gardens, shorter than 99% of U.S. towns.
Heating and cooling a home in Judith Gap
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Judith Gap, 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 Judith Gap 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 Judith Gap averaged 1.2° warmer than the 1900s. The biggest change is in January (+4.6°). The shift is larger than in 51% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Judith Gap’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 8° to 36°. May is the most reliable, staying within 9°.
Common questions about Judith Gap’s climate
What is the coldest month in Judith Gap?
January, with a typical high of 37° and a low of 13°.
What is the hottest month in Judith Gap?
July, with a typical high of 81° and a low of 49°. About 17 days a year reach 90°.
How much snow does Judith Gap get?
About 28 inches in a normal winter, most of it in February.
When is the first frost in Judith Gap?
In half of years the first 32° night comes by September 15, and the last spring frost by June 1.
What is the rainiest month in Judith Gap?
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 Judith Gap itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Judith Gap, MT (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.