South Windham has cold, snowy winters and pleasant summers, with plenty of rain
A typical July afternoon reaches 81°, a January night drops to 12°, and about 69 inches of snow falls in a normal winter.
A year in South Windham at a glance
Each month’s typical high and low, and what it brings.
What stands out about South Windham’s climate
Read from where South Windham sits among Maine’s towns. The page puts what stands out first.
About 172 frost-free days a year
In half of years the last 32° night comes by April 30 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
Living with South Windham’s climate
What the numbers mean for a garden, a driveway, a furnace and a free afternoon.
172 frost-free days. The last frost comes by Apr 30 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 69" a winter over 16 days with an inch or more, most in January. Snow covers the ground about 74 days a year.
Months averaging under 55° run from October through May. Heating is 94% of the year’s heating-and-cooling load.
About 8 days a year reach 90°, and July afternoons average 81°.
The nicest months are May, June, July, August and September.
Parks & trails →Normals are averages. Ice storms, nor’easters, floods and heat waves are on the natural hazards page.
Natural hazards →69 inches of snow, 49 of rain and melt
October is the wettest month and January 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
What a year in South Windham feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
South Windham and its neighbors
Windham has the coldest January nights next door (11°) and Little Falls the hottest July afternoons (81°). Tap a town to see its climate.
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 South Windham averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.5°).
A bigger shift than in 87% of U.S. towns.
Change by month
How South Windham compares
Against every U.S. town on TownTapestry, each counted once, with its place in Maine.
South Windham 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 | 31° | 12° | 3.4" | 18.6" | 11 | 23 | 12° – 29° |
| February | 34° | 14° | 3.4" | 16.6" | 10 | 21 | 11° – 31° |
| March | 42° | 23° | 4.1" | 13.6" | 11 | 16 | 25° – 40° |
| April | 55° | 33° | 4.4" | 2.8" | 11 | 2 | 41° – 49° |
| May | 66° | 43° | 3.8" | 0 | 13 | 0 | 50° – 60° |
| June | 75° | 53° | 4.4" | 0 | 12 | 0 | 61° – 67° |
| July | 81° | 59° | 3.7" | 0 | 11 | 0 | 65° – 73° |
| August | 79° | 58° | 3.6" | 0 | 9 | 0 | 66° – 71° |
| September | 71° | 49° | 3.9" | 0 | 9 | 0 | 56° – 65° |
| October | 59° | 39° | 5.2" | 0.2" | 11 | 0 | 45° – 56° |
| November | 47° | 29° | 4.4" | 2.3" | 11 | 2 | 33° – 43° |
| December | 36° | 19° | 4.5" | 14.6" | 12 | 11 | 21° – 36° |
| Year | 57° | 36° | 49.0" | 68.7" | 131 | 74 |
Heating and cooling a home in South Windham
94% 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 11° to 31°. August is the most reliable, staying within 5°.
Common questions about South Windham’s climate
What is the coldest month in South Windham?
January, with a typical high of 31° and a low of 12°.
What is the hottest month in South Windham?
July, with a typical high of 81° and a low of 59°. About 8 days a year reach 90°.
How much snow does South Windham get?
About 69 inches in a normal winter, most of it in January.
When is the first frost in South Windham?
In half of years the first 32° night comes by October 20, and the last spring frost by April 30.
What is the rainiest month in South Windham?
October, with 5.2 inches of rain and melted snow. The year totals 49 inches.
Neighbors talk weather
Gardens, snow, and the best days of the year in South Windham.
Your answer becomes a post in Town Square.
Temperatures and rainfall come from NOAA’s gridded climate normals for South Windham itself (about a 3-mile square). Snow, frost dates and day counts come from NOAA’s weather station at Portland Intl Jetport, ME (9 mi, snow) and Windham 2nw, ME (8 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. Today’s forecast: National Weather Service.