Copley, MN climate
Copley has cold, snowy winters and pleasant summers. A typical July afternoon reaches 78°, a January night drops to -3°, and about 52 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Copley feels like
Winter
Spring
Summer
Fall
Copley 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 | 16° | -3° | 0.6" | 9.6" | 9 | -6° – 22° |
| February | 22° | 0° | 0.7" | 8.0" | 8 | 0° – 29° |
| March | 35° | 15° | 0.9" | 7.8" | 8 | 14° – 38° |
| April | 51° | 29° | 1.7" | 6.2" | 9 | 31° – 48° |
| May | 65° | 41° | 2.9" | 0.1" | 13 | 46° – 58° |
| June | 74° | 52° | 4.4" | 0 | 14 | 58° – 68° |
| July | 78° | 56° | 3.5" | 0 | 13 | 60° – 72° |
| August | 77° | 54° | 3.3" | 0 | 11 | 58° – 69° |
| September | 68° | 46° | 2.8" | 0 | 12 | 50° – 62° |
| October | 52° | 34° | 2.5" | 1.0" | 11 | 36° – 48° |
| November | 35° | 19° | 1.1" | 9.1" | 9 | 16° – 39° |
| December | 22° | 6° | 0.9" | 9.8" | 10 | 0° – 23° |
| Year | 49° | 29° | 25.2" | 51.6" | 126 |
“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 Copley
Copley gets 25 inches of rain and melted snow a year. June is the wettest month and January the driest. Rain or snow falls on about 126 days a year.
About 132 frost-free days a year
In half of years the last 32° night comes by May 15 and the first one by September 26. That leaves about 132 frost-free days for gardens, shorter than 94% of U.S. towns.
Heating and cooling a home in Copley
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Copley, 97% of that work is heating and 3% 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.
Copley and its neighbors
Copley borders 5 towns with climate data. January nights across them vary by 0.2°. Bagley has both the coldest January nights (-3°) and the hottest July afternoons (78°). Copley’s January low is -3° and its July high 78°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Copley 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 Copley averaged 1.7° warmer than the 1900s. The biggest change is in January (+4.4°). The shift is larger than in 81% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Copley’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 22°. June is the most reliable, staying within 10°.
Common questions about Copley’s climate
What is the coldest month in Copley?
January, with a typical high of 16° and a low of -3°.
What is the hottest month in Copley?
July, with a typical high of 78° and a low of 56°. About 3 days a year reach 90°.
How much snow does Copley get?
About 52 inches in a normal winter, most of it in December.
When is the first frost in Copley?
In half of years the first 32° night comes by September 26, and the last spring frost by May 15.
What is the rainiest month in Copley?
June, with 4.4 inches of rain and melted snow. The year totals 25 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Copley itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Itasca Univ Of Minn, MN (23 mi, snow) and Fosston 1 E, MN (17 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.