Nickels-Sortwell House · Photo: WestportWiki · CC BY-SA 3.0Wiscasset gets about 79 inches of snow a winter, more than 95% of U.S. towns
Expect July afternoons of about 78°. Its July afternoons stay fresher than in 96% of U.S. towns. Warming shows here too: 1.8° more than in 1901–2000, led by December. Central heating does most of its work from October to April, in months below 50° on average.
A year in Wiscasset at a glance
Each month’s typical high and low, and what it brings.
What stands out about Wiscasset’s climate
Compared with towns across the U.S., with Wiscasset’s place in Maine beside it.
What a year in Wiscasset feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 151 frost-free days a year
In half of years the last 32° night comes by May 8 and the first by October 7. Frost and day counts come from NOAA’s station at Wiscasset Airport, 4 miles from the town’s center, at about the same height.
The 2023 USDA map puts Wiscasset’s center in zone 5b: the coldest night of a typical winter, averaged over 1991–2020, reaches about −11°. 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 79 inches of snow a winter
Snow, measured at Newcastle, ME, is heaviest from January through February, about 20 inches a month. Precipitation (rain plus melted snow) adds up to 48 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 142 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Wiscasset
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 Wiscasset Airport.
Living with Wiscasset’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
151 frost-free days in zone 5b. The last frost comes by May 8 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 7.
Months with highs of 62–84° and lows of 40° or more: May, June, July, August and September. 12 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Wiscasset from natural hazards, river flooding is the largest share (38%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Wiscasset and its neighbors
Every town next door is within a degree of Wiscasset in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Wiscasset’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 |
|---|---|---|---|---|
| Wiscasset, ME | 12° | 78° | 48" | 79" |
| Hamilton, NY | 13° | 79° | 45" | 77" |
| Dalton, MA | 13° | 80° | 48" | 77" |
| Fairfax, VT | 9° | 80° | 43" | 80" |
| Bradford, PA | 15° | 80° | 44" | 75" |
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 Wiscasset averaged 1.8° warmer than the 1900s. The biggest change is in December (+3.7°).
A bigger shift than in 78% 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 Wiscasset compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Wiscasset’s place among Maine’s.
Wiscasset weather by month
Highs, lows and precipitation from NOAA’s grid at Wiscasset’s center; snow, wet days and snow on the ground from Newcastle, ME. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 30° | 12° | 3.6" | 19.6" | 12 | 25 | 12° – 28° |
| February | 33° | 14° | 3.3" | 20.3" | 11 | 25 | 10° – 30° |
| March | 41° | 23° | 4.1" | 14.1" | 11 | 18 | 25° – 39° |
| April | 53° | 33° | 4.2" | 4.4" | 12 | 2 | 40° – 48° |
| May | 64° | 43° | 3.7" | 0.0" | 14 | 0 | 49° – 58° |
| June | 73° | 52° | 4.3" | 0.0" | 13 | 0 | 60° – 66° |
| July | 78° | 59° | 3.4" | 0.0" | 12 | 0 | 64° – 71° |
| August | 77° | 57° | 3.3" | 0.0" | 10 | 0 | 65° – 71° |
| September | 70° | 50° | 4.1" | 0.0" | 10 | 0 | 56° – 65° |
| October | 58° | 39° | 5.1" | 0.3" | 12 | 0 | 45° – 56° |
| November | 46° | 30° | 4.5" | 3.5" | 12 | 2 | 33° – 42° |
| December | 36° | 20° | 4.4" | 16.5" | 13 | 15 | 21° – 36° |
| Year | 55° | 36° | 48.1" | 78.7" | 142 | 88 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 10° to 30°. August is the most reliable, staying within 6°.
Where Wiscasset’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 Wiscasset’s center.
- Snow: Newcastle, ME.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Wiscasset Airport, 4 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 Wiscasset’s climate
What is the weather like in Wiscasset?
A typical July afternoon reaches 78°, a January night drops to 12°, and about 79 inches of snow falls in a normal winter. Colder January nights than 91% of U.S. towns; cooler July afternoons than 96% of U.S. towns.
How cold does it get in Wiscasset in winter?
January nights average 12°. About 160 nights a year reach 32° or below and 11 reach 0° or below. In the coldest January of the last 30 years the month averaged 12°.
How much snow does Wiscasset get?
About 79 inches in a normal winter at Newcastle, ME, heaviest from January through February, about 20 inches a month, with snow on the ground about 88 days a year.
How hot does it get in Wiscasset?
July, with a typical high of 78° and a low of 59°. About 3 days a year reach 90° (Wiscasset Airport).
When is the first and last frost in Wiscasset?
In half of years the last spring frost (32°) comes by May 8 and the first fall frost by October 7, about 151 frost-free days, at Wiscasset Airport.
What growing zone is Wiscasset in?
Zone 5b on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −11°.
What is the best time of year to visit Wiscasset?
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 Wiscasset getting warmer?
Yes: 1991–2020 averaged 1.8° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 78% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Wiscasset.
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.