Third River, MN climate
Third River has cold, snowy winters and pleasant summers. A typical July afternoon reaches 78°, a January night drops to -4°, and about 49 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Third River feels like
Winter
Spring
Summer
Fall
Third River 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 | 17° | -4° | 0.7" | 9.1" | 8 | -6° – 23° |
| February | 23° | -1° | 0.7" | 9.3" | 7 | 0° – 29° |
| March | 37° | 14° | 1.1" | 6.2" | 7 | 15° – 38° |
| April | 51° | 27° | 1.8" | 5.6" | 9 | 31° – 47° |
| May | 65° | 40° | 2.9" | 0 | 12 | 47° – 59° |
| June | 74° | 51° | 4.2" | 0 | 13 | 58° – 68° |
| July | 78° | 56° | 3.8" | 0 | 11 | 59° – 72° |
| August | 76° | 53° | 3.2" | 0 | 9 | 58° – 68° |
| September | 67° | 45° | 2.9" | 0 | 10 | 49° – 61° |
| October | 52° | 33° | 2.6" | 1.4" | 10 | 35° – 48° |
| November | 35° | 19° | 1.2" | 5.8" | 7 | 17° – 39° |
| December | 22° | 5° | 0.9" | 11.5" | 9 | 0° – 23° |
| Year | 50° | 28° | 26.0" | 48.9" | 111 |
“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 Third River
Third River gets 26 inches of rain and melted snow a year. June is the wettest month and February the driest. Rain or snow falls on about 111 days a year.
About 115 frost-free days a year
In half of years the last 32° night comes by May 24 and the first one by September 17. That leaves about 115 frost-free days for gardens, shorter than 98% of U.S. towns.
Heating and cooling a home in Third River
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Third River, 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.
Third River and its neighbors
Third River borders 3 towns with climate data. January nights across them vary by 0.6°. Moose Park has the coldest January nights (-4°) and Good Hope the hottest July afternoons (78°). Third River’s January low is -4° and its July high 78°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Third River 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 Third River averaged 1.8° warmer than the 1900s. The biggest change is in January (+4.3°). The shift is larger than in 86% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Third River’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. January swings the most: between 1991 and 2020 its average temperature ranged from -6° to 23°. June is the most reliable, staying within 10°.
Common questions about Third River’s climate
What is the coldest month in Third River?
January, with a typical high of 17° and a low of -4°.
What is the hottest month in Third River?
July, with a typical high of 78° and a low of 56°. About 2 days a year reach 90°.
How much snow does Third River get?
About 49 inches in a normal winter, most of it in December.
When is the first frost in Third River?
In half of years the first 32° night comes by September 17, and the last spring frost by May 24.
What is the rainiest month in Third River?
June, with 4.2 inches of rain and melted snow. The year totals 26 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Third River itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cass Lake, MN (21 mi, snow) and Blackduck, MN (8 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.