Blue Earth, MN climate
Blue Earth has cold, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 7°, and about 47 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decade3° cooler than normal today. The forecast high is 63°, and a typical Oct 1 in Blue Earth peaks around 66°.Live forecast: National Weather Service · Normal: NOAA 1991–2020
What a year in Blue Earth feels like
Winter
Spring
Summer
Fall
Blue Earth 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 | 24° | 7° | 0.9" | 10.4" | 8 | 27 | 4° – 27° |
| February | 29° | 11° | 0.9" | 9.1" | 7 | 21 | 9° – 31° |
| March | 41° | 23° | 1.7" | 7.3" | 8 | 13 | 25° – 48° |
| April | 57° | 35° | 3.3" | 4.1" | 11 | 2 | 34° – 54° |
| May | 70° | 48° | 4.4" | 0 | 13 | 0 | 52° – 66° |
| June | 80° | 59° | 5.1" | 0 | 12 | 0 | 65° – 73° |
| July | 83° | 62° | 4.1" | 0 | 9 | 0 | 65° – 78° |
| August | 80° | 59° | 3.9" | 0 | 9 | 0 | 64° – 74° |
| September | 74° | 51° | 3.3" | 0 | 9 | 0 | 56° – 67° |
| October | 60° | 38° | 2.5" | 0.4" | 9 | 0 | 42° – 54° |
| November | 43° | 25° | 1.5" | 5.4" | 7 | 6 | 24° – 46° |
| December | 29° | 13° | 1.2" | 10.5" | 8 | 22 | 6° – 28° |
| Year | 56° | 36° | 32.7" | 47.2" | 109 | 92 |
“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 Blue Earth
Blue Earth gets 33 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 109 days a year. Snow covers the ground about 92 days of the year.
About 166 frost-free days a year
In half of years the last 32° night comes by April 27 and the first one by October 10. That leaves about 166 frost-free days for gardens, shorter than 64% of U.S. towns.
Heating and cooling a home in Blue Earth
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Blue Earth, 92% of that work is heating and 8% 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.
Blue Earth and its neighbors
Blue Earth borders 2 towns with climate data. January nights across them vary by 0.1°. Blue Earth City has both the coldest January nights (7°) and the hottest July afternoons (82°). Blue Earth’s January low is 7° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Blue Earth 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 Blue Earth averaged 0.7° warmer than the 1900s. The biggest change is in December (+2.3°). The shift is smaller than in 87% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Blue Earth’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 4° to 27°. June is the most reliable, staying within 8°.
Common questions about Blue Earth’s climate
What is the coldest month in Blue Earth?
January, with a typical high of 24° and a low of 7°.
What is the hottest month in Blue Earth?
July, with a typical high of 83° and a low of 62°. About 10 days a year reach 90°.
How much snow does Blue Earth get?
About 47 inches in a normal winter, most of it in December.
When is the first frost in Blue Earth?
In half of years the first 32° night comes by October 10, and the last spring frost by April 27.
What is the rainiest month in Blue Earth?
June, with 5.1 inches of rain and melted snow. The year totals 33 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Blue Earth itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Winnebago, MN (9 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.