Few U.S. towns have colder winter nights than Maine
In July the day’s top temperature is typically 79°. The year swings widely: the coldest month’s nights and the warmest month’s afternoons are 74° apart. Summers stay cool: July afternoons here are cooler than in 94% of U.S. towns. The frost-free window for a garden runs roughly May 11 to September 30.
A year in Maine at a glance
Each month’s typical high and low, and what it brings.
What stands out about Maine’s climate
Compared with towns across the U.S., with Maine’s place in Wisconsin beside it.
What a year in Maine feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 139 frost-free days a year
In half of years the last 32° night comes by May 11 and the first by September 30. Frost and day counts come from NOAA’s station at Merrill, WI, 8 miles from the town’s center, at about the same height.
The 2023 USDA map puts Maine’s center in zone 4b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −22°. 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 63 inches of snow a winter
Snow, measured at Wausau Wsaw Tv, WI, falls mostly in February and December. Precipitation (rain plus melted snow) adds up to 34 inches a year; June is the wettest month and February the driest. Rain or snow falls on about 131 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Maine
96% of the work is heating, so the furnace matters far more than the air conditioner. Months averaging under 55° run from October through May.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Merrill, WI.
Living with Maine’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
139 frost-free days in zone 4b. The last frost comes by May 11 in half of years, so many gardeners wait a week or two past that to set out tomatoes. The first fall frost comes by Sep 30.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 1.2 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Maine from natural hazards, river flooding is the largest share (47%); heat waves, cold waves, winter storms and ice storms together are 37%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Maine and its neighbors
Every town next door is within a degree of Maine in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Maine’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 |
|---|---|---|---|---|
| Maine, WI | 5° | 79° | 34" | 63" |
| Stewartville, MN | 6° | 81° | 36" | 53" |
| Beekmantown, NY | 9° | 80° | 35" | 80" |
| Littleton, NH | 6° | 80° | 40" | 68" |
| Houghton Lake, MI | 12° | 81° | 33" | 66" |
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 Maine averaged 1.7° warmer than the 1900s. The biggest change is in December (+3.6°).
A bigger shift than in 75% 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 Maine compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Maine’s place among Wisconsin’s.
Maine weather by month
Highs, lows and precipitation from NOAA’s grid at Maine’s center; snow, wet days and snow on the ground from Wausau Wsaw Tv, WI. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 22° | 5° | 1.2" | 12.1" | 10 | 29 | 2° – 26° |
| February | 27° | 7° | 1.1" | 14.9" | 9 | 28 | 4° – 30° |
| March | 39° | 18° | 1.8" | 8.3" | 9 | 22 | 19° – 44° |
| April | 53° | 31° | 3.0" | 6.6" | 12 | 5 | 32° – 49° |
| May | 66° | 43° | 3.7" | 0.2" | 14 | 0 | 48° – 62° |
| June | 76° | 53° | 4.8" | 0.0" | 13 | 0 | 60° – 69° |
| July | 79° | 57° | 3.9" | 0.0" | 11 | 0 | 61° – 74° |
| August | 77° | 55° | 3.8" | 0.0" | 11 | 0 | 61° – 70° |
| September | 69° | 47° | 3.9" | 0.0" | 11 | 0 | 51° – 64° |
| October | 55° | 35° | 3.1" | 1.0" | 11 | 1 | 40° – 51° |
| November | 40° | 24° | 1.9" | 4.8" | 9 | 4 | 22° – 41° |
| December | 27° | 12° | 1.5" | 15.5" | 11 | 21 | 8° – 30° |
| Year | 52° | 32° | 33.5" | 63.4" | 131 | 110 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 4° to 30°. August is the most reliable, staying within 9°.
Where Maine’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 Maine’s center.
- Snow: Wausau Wsaw Tv, WI.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Merrill, WI, 8 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 Maine’s climate
What is the weather like in Maine?
A typical July afternoon reaches 79°, a January night drops to 5°, and about 63 inches of snow falls in a normal winter. Colder January nights than 98% of U.S. towns; cooler July afternoons than 94% of U.S. towns.
How cold does it get in Maine in winter?
January nights average 5°. About 182 nights a year reach 32° or below and 36 reach 0° or below. In the coldest January of the last 30 years the month averaged 2°.
How much snow does Maine get?
About 63 inches in a normal winter at Wausau Wsaw Tv, WI, most of it in February and December, with snow on the ground about 110 days a year.
How hot does it get in Maine?
July, with a typical high of 79° and a low of 57°. About 5 days a year reach 90° (Merrill, WI).
When is the first and last frost in Maine?
In half of years the last spring frost (32°) comes by May 11 and the first fall frost by September 30, about 139 frost-free days, at Merrill, WI.
What growing zone is Maine in?
Zone 4b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −22°.
What is the best time of year to visit Maine?
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 Maine getting warmer?
Yes: 1991–2020 averaged 1.7° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 75% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Maine.
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.