Grosse Ile, MI climate
Grosse Ile has chilly, snowy winters and pleasant summers. A typical July afternoon reaches 83°, a January night drops to 20°, and about 54 inches of snow falls in a normal winter.
NOAA 1991-2020 climate normals Updated once a decadeWhat a year in Grosse Ile feels like
Winter
Spring
Summer
Fall
Grosse Ile 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 | 32° | 20° | 2.4" | 13.9" | 15 | 18 | 17° – 36° |
| February | 35° | 22° | 2.0" | 17.0" | 13 | 19 | 15° – 37° |
| March | 45° | 29° | 2.4" | 7.5" | 11 | 8 | 28° – 50° |
| April | 57° | 39° | 3.3" | 1.9" | 13 | 1 | 42° – 54° |
| May | 69° | 50° | 3.8" | 0.1" | 13 | 0 | 52° – 66° |
| June | 79° | 61° | 3.4" | 0 | 11 | 0 | 64° – 74° |
| July | 83° | 65° | 3.4" | 0 | 11 | 0 | 69° – 78° |
| August | 81° | 64° | 3.4" | 0 | 9 | 0 | 67° – 77° |
| September | 74° | 57° | 3.2" | 0 | 9 | 0 | 60° – 69° |
| October | 61° | 46° | 2.8" | 0 | 12 | 0 | 50° – 60° |
| November | 48° | 35° | 2.7" | 2.2" | 11 | 2 | 35° – 48° |
| December | 37° | 26° | 2.3" | 10.9" | 13 | 10 | 20° – 41° |
| Year | 58° | 43° | 35.1" | 53.5" | 142 | 57 |
“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 Grosse Ile
Grosse Ile gets 35 inches of rain and melted snow a year. May is the wettest month and February the driest. Rain or snow falls on about 142 days a year. Snow covers the ground about 57 days of the year.
About 188 frost-free days a year
In half of years the last 32° night comes by April 20 and the first one by October 27. That leaves about 188 frost-free days for gardens, longer than 62% of U.S. towns.
Heating and cooling a home in Grosse Ile
Engineers use “degree days” to estimate how hard a furnace or air conditioner works. In Grosse Ile, 88% of that work is heating and 12% 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.
Grosse Ile and its neighbors
Grosse Ile borders 5 towns with climate data. January nights across them vary by 0.3°. Brownstown has both the coldest January nights (20°) and the hottest July afternoons (83°). Grosse Ile’s January low is 20° and its July high 83°.
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value.
How Grosse Ile 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 Grosse Ile averaged 1.6° warmer than the 1900s. The biggest change is in December (+2.7°). The shift is larger than in 74% of U.S. towns.
Change by month1991–2020 average minus 1901–2000 average, at Grosse Ile’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 15° to 37°. September is the most reliable, staying within 9°.
Common questions about Grosse Ile’s climate
What is the coldest month in Grosse Ile?
January, with a typical high of 32° and a low of 20°.
What is the hottest month in Grosse Ile?
July, with a typical high of 83° and a low of 65°. About 13 days a year reach 90°.
How much snow does Grosse Ile get?
About 54 inches in a normal winter, most of it in February.
When is the first frost in Grosse Ile?
In half of years the first 32° night comes by October 27, and the last spring frost by April 20.
What is the rainiest month in Grosse Ile?
May, with 3.8 inches of rain and melted snow. The year totals 35 inches.
Temperatures and rainfall come from NOAA’s gridded climate normals for Grosse Ile itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Wyandotte, MI (6 mi, snow) and Detroit Metro Airport, MI (12 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.