Plymouth has chilly, snowy winters and pleasant summers
A typical July afternoon reaches 84°, a January night drops to 17°, and about 61 inches of snow falls in a normal winter.
A year in Plymouth at a glance
Each month’s typical high and low, and what it brings.
What stands out about Plymouth’s climate
Read from where Plymouth sits among Michigan’s towns. The page puts what stands out first.
About 160 frost-free days a year
In half of years the last 32° night comes by May 3 and the first by October 13.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
What a year in Plymouth feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
61 inches of snow, 33 of rain and melt
May is the wettest month and February the driest. Rain or snow falls on about 166 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Living with Plymouth’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
160 frost-free days. The last frost comes by May 3 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Oct 13.
About 61" a winter over 19 days with an inch or more, most in January. Snow covers the ground about 59 days a year.
Months averaging under 55° run from October through April. Heating is 91% of the year’s heating-and-cooling load.
About 12 days a year reach 90°, and July afternoons average 84°.
The nicest months are May, June, July, August and September. 1.3 miles of trails are waiting.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →Warmer than it used to be
The last 30 years in Plymouth averaged 1.7° warmer than the 1900s. The biggest change is in December (+2.8°).
A bigger shift than in 81% of U.S. towns.
Change by month
How Plymouth compares
Against every U.S. town on TownTapestry, each counted once, with its place in Michigan.
Plymouth 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° | 17° | 2.1" | 18.3" | 18 | 21 | 15° – 34° |
| February | 35° | 18° | 1.8" | 15.3" | 14 | 17 | 13° – 36° |
| March | 45° | 26° | 2.2" | 8.3" | 14 | 7 | 27° – 50° |
| April | 59° | 37° | 3.1" | 2.6" | 14 | 1 | 41° – 53° |
| May | 70° | 48° | 3.7" | 0 | 15 | 0 | 51° – 65° |
| June | 80° | 57° | 3.3" | 0 | 12 | 0 | 63° – 73° |
| July | 84° | 61° | 3.3" | 0 | 12 | 0 | 67° – 78° |
| August | 82° | 60° | 3.3" | 0 | 11 | 0 | 65° – 75° |
| September | 75° | 52° | 3.1" | 0 | 11 | 0 | 58° – 67° |
| October | 62° | 41° | 2.7" | 0.1" | 13 | 0 | 48° – 58° |
| November | 48° | 32° | 2.5" | 4.1" | 14 | 2 | 33° – 47° |
| December | 37° | 23° | 2.1" | 12.7" | 17 | 12 | 18° – 40° |
| Year | 59° | 39° | 33.2" | 61.4" | 166 | 59 |
Heating and cooling a home in Plymouth
91% of the work is heating, so the furnace matters far more than the air conditioner.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. Source: NOAA station normals.
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 13° to 36°. June is the most reliable, staying within 9°.
Common questions about Plymouth’s climate
What is the coldest month in Plymouth?
January, with a typical high of 32° and a low of 17°.
What is the hottest month in Plymouth?
July, with a typical high of 84° and a low of 61°. About 12 days a year reach 90°.
How much snow does Plymouth get?
About 61 inches in a normal winter, most of it in January.
When is the first frost in Plymouth?
In half of years the first 32° night comes by October 13, and the last spring frost by May 3.
What is the rainiest month in Plymouth?
May, with 3.7 inches of rain and melted snow. The year totals 33 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Plymouth.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Plymouth itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Ann Arbor U Of Mich, MI (11 mi) away. Normals are 30-year averages, not a forecast. Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000. Today’s forecast: National Weather Service.