Cass Lake, MN climate
Cass Lake has cold, snowy winters and pleasant summers. A typical July afternoon reaches 79°, a January night drops to -2°, and about 49 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Cass Lake feels like
Winter
Spring
Summer
Fall
Cass Lake 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 | 18° | -2° | 0.7" | 9.1" | 8 | -5° – 24° |
| February | 24° | 1° | 0.7" | 9.3" | 7 | 2° – 29° |
| March | 37° | 15° | 1.1" | 6.2" | 7 | 17° – 39° |
| April | 52° | 28° | 1.9" | 5.6" | 9 | 32° – 48° |
| May | 66° | 41° | 2.9" | 0 | 12 | 48° – 60° |
| June | 74° | 53° | 4.3" | 0 | 13 | 59° – 69° |
| July | 79° | 57° | 3.7" | 0 | 11 | 60° – 74° |
| August | 77° | 54° | 3.2" | 0 | 9 | 59° – 69° |
| September | 68° | 46° | 2.9" | 0 | 10 | 50° – 63° |
| October | 53° | 34° | 2.6" | 1.4" | 10 | 35° – 49° |
| November | 36° | 20° | 1.2" | 5.8" | 7 | 18° – 40° |
| December | 23° | 6° | 0.9" | 11.5" | 9 | 1° – 24° |
| Year | 51° | 30° | 26.1" | 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 Cass Lake
Cass Lake 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 131 frost-free days a year
In half of years the last 32° night comes by May 17 and the first one by September 26. That leaves about 131 frost-free days for gardens, shorter than 94% of U.S. towns.
Heating and cooling a home in Cass Lake
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Cass Lake, 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 Cass Lake 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 Cass Lake averaged 1.9° warmer than the 1900s. The biggest change is in January (+4.5°). The shift is larger than in 91% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Cass Lake’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 -5° to 24°. June is the most reliable, staying within 10°.
Common questions about Cass Lake’s climate
What is the coldest month in Cass Lake?
January, with a typical high of 18° and a low of -2°.
What is the hottest month in Cass Lake?
July, with a typical high of 79° and a low of 57°. About 4 days a year reach 90°.
How much snow does Cass Lake get?
About 49 inches in a normal winter, most of it in December.
When is the first frost in Cass Lake?
In half of years the first 32° night comes by September 26, and the last spring frost by May 17.
What is the rainiest month in Cass Lake?
June, with 4.3 inches of rain and melted snow. The year totals 26 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Cass Lake itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Cass Lake, MN (1 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.