Jenison has chilly, snowy winters and pleasant summers
A typical July afternoon reaches 83°, a January night drops to 18°, and about 78 inches of snow falls in a normal winter.
A year in Jenison at a glance
Each month’s typical high and low, and what it brings.
What stands out about Jenison’s climate
Read from where Jenison sits among Michigan’s towns. The page puts what stands out first.
About 174 frost-free days a year
In half of years the last 32° night comes by April 29 and the first by October 20.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
What a year in Jenison feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
Living with Jenison’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
174 frost-free days. The last frost comes by Apr 29 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 20.
About 78" a winter over 24 days with an inch or more, most in January. Snow covers the ground about 68 days a year.
Months averaging under 55° run from October through April. Heating is 90% of the year’s heating-and-cooling load.
About 10 days a year reach 90°, and July afternoons average 83°.
The nicest months are May, June, July, August and September. 5.7 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 →78 inches of snow, 37 of rain and melt
October is the wettest month and February the driest. Rain or snow falls on about 149 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Warmer than it used to be
The last 30 years in Jenison averaged 1.5° warmer than the 1900s. The biggest change is in December (+2.8°).
A bigger shift than in 68% of U.S. towns.
Change by month
How Jenison compares
Against every U.S. town on TownTapestry, each counted once, with its place in Michigan.
Jenison 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° | 18° | 2.5" | 22.6" | 17 | 23 | 16° – 34° |
| February | 34° | 18° | 2.0" | 17.2" | 13 | 18 | 14° – 35° |
| March | 45° | 26° | 2.3" | 7.6" | 12 | 8 | 26° – 50° |
| April | 58° | 36° | 3.8" | 2.0" | 13 | 1 | 39° – 53° |
| May | 70° | 47° | 3.8" | 0 | 13 | 0 | 50° – 64° |
| June | 79° | 56° | 3.6" | 0 | 11 | 0 | 63° – 73° |
| July | 83° | 60° | 3.3" | 0 | 10 | 0 | 67° – 78° |
| August | 81° | 59° | 3.3" | 0 | 10 | 0 | 65° – 75° |
| September | 74° | 51° | 3.2" | 0 | 10 | 0 | 57° – 67° |
| October | 61° | 41° | 3.9" | 0.3" | 13 | 0 | 48° – 57° |
| November | 48° | 32° | 3.0" | 7.1" | 13 | 3 | 32° – 47° |
| December | 37° | 24° | 2.5" | 20.8" | 16 | 14 | 20° – 39° |
| Year | 59° | 39° | 37.0" | 77.6" | 149 | 68 |
Heating and cooling a home in Jenison
90% 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. March swings the most: from 1991 to 2020 its average ranged from 26° to 50°. October is the most reliable, staying within 9°.
Common questions about Jenison’s climate
What is the coldest month in Jenison?
January, with a typical high of 32° and a low of 18°.
What is the hottest month in Jenison?
July, with a typical high of 83° and a low of 60°. About 10 days a year reach 90°.
How much snow does Jenison get?
About 78 inches in a normal winter, most of it in January.
When is the first frost in Jenison?
In half of years the first 32° night comes by October 20, and the last spring frost by April 29.
What is the rainiest month in Jenison?
October, with 3.9 inches of rain and melted snow. The year totals 37 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in Jenison.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for Jenison itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Grand Rapids, MI (14 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.