McMillan, MI climate
McMillan has cold, snowy winters and pleasant summers. A typical July afternoon reaches 76°, a January night drops to 8°, and about 170 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in McMillan feels like
Winter
Spring
Summer
Fall
McMillan 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 | 23° | 8° | 2.5" | 46.1" | 19 | 31 | 4° – 25° |
| February | 26° | 8° | 1.8" | 36.5" | 15 | 29 | 1° – 29° |
| March | 35° | 15° | 1.9" | 16.3" | 10 | 29 | 13° – 38° |
| April | 48° | 27° | 2.3" | 9.7" | 9 | 15 | 29° – 45° |
| May | 62° | 38° | 2.6" | 0.2" | 11 | 0 | 43° – 56° |
| June | 72° | 48° | 2.9" | 0 | 10 | 0 | 55° – 65° |
| July | 76° | 53° | 3.4" | 0 | 10 | 0 | 57° – 70° |
| August | 75° | 53° | 2.8" | 0 | 9 | 0 | 59° – 68° |
| September | 67° | 46° | 3.8" | 0 | 12 | 0 | 50° – 62° |
| October | 53° | 36° | 4.2" | 1.2" | 15 | 0 | 39° – 51° |
| November | 39° | 26° | 2.9" | 17.2" | 14 | 10 | 26° – 39° |
| December | 29° | 16° | 2.6" | 42.7" | 16 | 25 | 12° – 32° |
| Year | 50° | 31° | 33.7" | 169.9" | 149 | 138 |
“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 McMillan
McMillan gets 34 inches of rain and melted snow a year. October is the wettest month and February the driest. Rain or snow falls on about 149 days a year. Snow covers the ground about 138 days of the year.
A year-round growing season
Heating and cooling a home in McMillan
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In McMillan, 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.
McMillan and its neighbors
McMillan borders 4 towns with climate data. January nights across them vary by 0.6°. Columbus has both the coldest January nights (8°) and the hottest July afternoons (77°). McMillan’s January low is 8° and its July high 76°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How McMillan 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 McMillan averaged 1.5° warmer than the 1900s. The biggest change is in December (+2.4°). The shift is larger than in 68% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at McMillan’s spot on NOAA’s grid
How much a month can swing
A normal is an average, and real years wander around it. February swings the most: between 1991 and 2020 its average temperature ranged from 1° to 29°. August is the most reliable, staying within 8°.
Common questions about McMillan’s climate
What is the coldest month in McMillan?
February, with a typical high of 26° and a low of 8°.
What is the hottest month in McMillan?
July, with a typical high of 76° and a low of 53°. About 2 days a year reach 90°.
How much snow does McMillan get?
About 170 inches in a normal winter, most of it in January.
When is the first frost in McMillan?
Frost is uncommon. Only 100% of years see a night at 32° or below.
What is the rainiest month in McMillan?
October, with 4.2 inches of rain and melted snow. The year totals 34 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for McMillan itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Tahquamenon Falls Sp, MI (15 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000.