Photo: Mac1island · CC BY-SA 3.0July in Marysville stays fresher than in 80% of U.S. towns
January nights here settle around 18°. Precipitation is light here, less than falls on 77% of U.S. towns. December has warmed most since 1901–2000, part of a 1.7° rise. Tender plants can go out after about April 19; in half of years the first frost comes by November 3.
A year in Marysville at a glance
Each month’s typical high and low, and what it brings.
What stands out about Marysville’s climate
Compared with towns across the U.S., with Marysville’s place in Michigan beside it.
What a year in Marysville feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 196 frost-free days a year
In half of years the last 32° night comes by April 19 and the first by November 3. Frost and day counts come from NOAA’s station at Port Huron, MI, 6 miles from the town’s center, at about the same height.
The 2023 USDA map puts Marysville’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −7°. Plant labels use the zone; frost dates tell you when to plant.
Freezing nights by month
Average nights at or below 32°
90° days by month
Average days at 90° or more
About 36 inches of snow a winter
Snow, measured at Port Huron, MI, is heaviest from January through February, about 11 inches a month. Precipitation (rain plus melted snow) adds up to 35 inches a year; May is the wettest month and February the driest. Rain or snow falls on about 140 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Marysville
89% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through April.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Port Huron, MI.
Living with Marysville’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
196 frost-free days in zone 6a. The last frost comes by Apr 19 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Nov 3.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 1.1 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Marysville from natural hazards, river flooding is the largest share (42%); heat waves, cold waves, winter storms and ice storms together are 33%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Marysville and its neighbors
Every town next door is within a degree of Marysville in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Marysville’s, farther away
TownRatings’ own comparison of NOAA 1991–2020 normals, not a NOAA product: places of 5,000+ at least 150 miles away, one per state, closest on January low, July high, precipitation and snow.
| Town | Jan. low | July high | Precip. | Snow |
|---|---|---|---|---|
| Marysville, MI | 18° | 82° | 35" | 36" |
| North Dansville, NY | 17° | 82° | 33" | 36" |
| Lake Forest, IL | 17° | 82° | 37" | 34" |
| Pleasant Prairie, WI | 16° | 82° | 35" | 36" |
| Portage, IN | 19° | 83° | 38" | 40" |
Temperatures and rain come from NOAA’s 5 km grid, so each town gets its own value. Snow and frost-free days come from the nearest weather station, so neighbors often share them.
Warmer than it used to be
The last 30 years in Marysville averaged 1.7° warmer than the 1900s. The biggest change is in December (+2.9°).
A bigger shift than in 69% of U.S. towns.
Change by month
The two periods overlap (1991–2000 is in both), which makes the gap a little smaller than it would be between separate periods.
How Marysville compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Marysville’s place among Michigan’s.
Marysville weather by month
Highs, lows and precipitation from NOAA’s grid at Marysville’s center; snow, wet days and snow on the ground from Port Huron, MI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 31° | 18° | 2.5" | 11.1" | 14 | 17 | 15° – 34° |
| February | 34° | 19° | 2.1" | 11.4" | 10 | 16 | 12° – 36° |
| March | 43° | 27° | 2.4" | 4.6" | 11 | 7 | 26° – 47° |
| April | 56° | 37° | 3.2" | 0.4" | 13 | 0 | 40° – 52° |
| May | 68° | 47° | 3.6" | 0.0" | 13 | 0 | 50° – 64° |
| June | 78° | 58° | 3.4" | 0.0" | 11 | 0 | 63° – 73° |
| July | 82° | 63° | 3.3" | 0.0" | 10 | 0 | 67° – 77° |
| August | 80° | 62° | 3.1" | 0.0" | 10 | 0 | 66° – 75° |
| September | 74° | 54° | 3.2" | 0.0" | 10 | 0 | 58° – 68° |
| October | 61° | 44° | 3.0" | 0.0" | 13 | 0 | 49° – 59° |
| November | 47° | 34° | 2.7" | 1.3" | 12 | 1 | 34° – 47° |
| December | 36° | 25° | 2.4" | 6.7" | 13 | 9 | 20° – 41° |
| Year | 57° | 41° | 34.8" | 35.5" | 140 | 50 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 12° to 36°. August is the most reliable, staying within 9°.
Where Marysville’s numbers come from
Normals are 30-year averages, not a forecast. How TownRatings reads climate data →
- Temperatures and precipitation: NOAA’s gridded 1991–2020 normals for the 5 km cell at Marysville’s center.
- Snow: Port Huron, MI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Port Huron, MI, 6 miles from the town’s center, at about the same height; the nearest station that passes our checks for distance, height and agreement with the grid.
- Growing zone: USDA Plant Hardiness Zone Map, 2023. USDA Agricultural Research Service and PRISM Group, Oregon State University, prism.oregonstate.edu/phzm, accessed 8 Oct 2026.
- Then and now: NOAA’s gridded normals for 1901–2000 at the same cell.
- Storms and extremes: FEMA National Risk Index (expected annual losses to buildings).
Common questions about Marysville’s climate
What is the weather like in Marysville?
A typical July afternoon reaches 82°, a January night drops to 18°, and about 36 inches of snow falls in a normal winter. Colder January nights than 68% of U.S. towns; cooler July afternoons than 80% of U.S. towns.
How cold does it get in Marysville in winter?
January nights average 18°. About 122 nights a year reach 32° or below and 3 reach 0° or below. In the coldest January of the last 30 years the month averaged 15°.
How much snow does Marysville get?
About 36 inches in a normal winter at Port Huron, MI, heaviest from January through February, about 11 inches a month, with snow on the ground about 50 days a year.
How hot does it get in Marysville?
July, with a typical high of 82° and a low of 63°. About 10 days a year reach 90° (Port Huron, MI).
When is the first and last frost in Marysville?
In half of years the last spring frost (32°) comes by April 19 and the first fall frost by November 3, about 196 frost-free days, at Port Huron, MI.
What growing zone is Marysville in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −7°.
What is the best time of year to visit Marysville?
By one simple rule (highs of 62–84° and lows of 40° or more), May, June, July, August and September. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Marysville getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 69% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Marysville.
Source: NOAA NCEI U.S. Climate Normals, 1991–2020 and 1901–2000; USDA/PRISM 2023 hardiness zones; FEMA National Risk Index. Today’s forecast: National Weather Service.