Round Lake, MN climate
Round Lake has cold, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 6°, and about 41 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Round Lake feels like
Winter
Spring
Summer
Fall
Round 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 | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 24° | 6° | 0.7" | 8.4" | 5 | 28 | 4° – 28° |
| February | 28° | 11° | 0.8" | 8.7" | 5 | 22 | 8° – 31° |
| March | 41° | 23° | 1.6" | 6.3" | 6 | 11 | 24° – 47° |
| April | 57° | 34° | 3.2" | 3.4" | 10 | 2 | 34° – 53° |
| May | 69° | 46° | 4.3" | 0 | 12 | 0 | 52° – 64° |
| June | 79° | 58° | 4.8" | 0 | 11 | 0 | 63° – 73° |
| July | 83° | 61° | 3.7" | 0 | 9 | 0 | 64° – 79° |
| August | 80° | 58° | 3.6" | 0 | 9 | 0 | 64° – 74° |
| September | 73° | 50° | 3.2" | 0 | 8 | 0 | 55° – 67° |
| October | 59° | 37° | 2.4" | 0.6" | 7 | 0 | 41° – 53° |
| November | 42° | 24° | 1.4" | 4.4" | 5 | 3 | 23° – 45° |
| December | 28° | 12° | 0.9" | 9.2" | 5 | 19 | 6° – 27° |
| Year | 55° | 35° | 30.7" | 41.0" | 92 | 84 |
“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 Round Lake
Round Lake gets 31 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 92 days a year. Snow covers the ground about 84 days of the year.
About 164 frost-free days a year
In half of years the last 32° night comes by April 30 and the first one by October 10. That leaves about 164 frost-free days for gardens, shorter than 67% of U.S. towns.
Heating and cooling a home in Round Lake
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Round Lake, 90% of that work is heating and 10% 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.
Round Lake and its neighbors
Round Lake borders 3 towns with climate data. January nights across them vary by 0.4°. Ewington has the coldest January nights (6°) and Indian Lake the hottest July afternoons (83°). Round Lake’s January low is 6° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Round 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 Round Lake averaged 0.9° warmer than the 1900s. The biggest change is in December (+2.1°). The shift is smaller than in 78% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Round Lake’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. March swings the most: between 1991 and 2020 its average temperature ranged from 24° to 47°. June is the most reliable, staying within 9°.
Common questions about Round Lake’s climate
What is the coldest month in Round Lake?
January, with a typical high of 24° and a low of 6°.
What is the hottest month in Round Lake?
July, with a typical high of 83° and a low of 61°. About 22 days a year reach 90°.
How much snow does Round Lake get?
About 41 inches in a normal winter, most of it in December.
When is the first frost in Round Lake?
In half of years the first 32° night comes by October 10, and the last spring frost by April 30.
What is the rainiest month in Round Lake?
June, with 4.8 inches of rain and melted snow. The year totals 31 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Round Lake itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Lake Park, IA (7 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.