Photo: Magicpiano · CC BY-SA 3.0Milton’s winters are colder and snowier than most of the U.S.
A typical July afternoon reaches 81°, a January night drops to 12°, and about 62 inches of snow falls in a normal winter.
A year in Milton at a glance
Each month’s typical high and low, and what it brings.
What stands out about Milton’s climate
Compared with towns across the U.S., with Milton’s place in New Hampshire beside it.
What a year in Milton feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 136 frost-free days a year
In half of years the last 32° night comes by May 16 and the first by September 30. Frost and day counts come from NOAA’s station at Sanford 2 Nnw, ME, 12 miles from the town’s center, 280 ft lower.
The 2023 USDA map puts Milton’s center in zone 6a: the coldest night of a typical winter, averaged over 1991–2020, reaches about −10°. 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 62 inches of snow a winter
Snow, measured at Lakeport 2, NH, falls mostly in January. Precipitation (rain plus melted snow) adds up to 49 inches a year; October is the wettest month and February the driest. Rain or snow falls on about 132 days a year.
Rain + melted snow by month
Inches of water
Snowfall by month
Inches of snow
Heating and cooling a home in Milton
95% 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 Sanford 2 Nnw, ME.
Living with Milton’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
136 frost-free days in zone 6a. The last frost comes by May 16 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. 44 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Milton from natural hazards, river flooding is the largest share (74%); heat waves, cold waves, winter storms and ice storms together are 9%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Milton and its neighbors
Wakefield has the coldest January nights next door (11°, 1° colder) and Lebanon the hottest July afternoons (82°, 1° warmer). Differences under a degree are within what the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Milton’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 |
|---|---|---|---|---|
| Milton, NH | 12° | 81° | 49" | 62" |
| Broadalbin, NY | 12° | 81° | 46" | 60" |
| Torrington, CT | 15° | 81° | 51" | 59" |
| St. Marys, PA | 16° | 80° | 46" | 53" |
| Orono, ME | 9° | 80° | 43" | 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 Milton averaged 1.5° warmer than the 1900s. The biggest change is in December (+3.2°).
A bigger shift than in 61% 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 Milton compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Milton’s place among New Hampshire’s.
Milton weather by month
Highs, lows and precipitation from NOAA’s grid at Milton’s center; snow, wet days and snow on the ground from Lakeport 2, NH. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 30° | 12° | 3.5" | 18.8" | 12 | 27 | 12° – 29° |
| February | 34° | 13° | 3.3" | 16.9" | 9 | 25 | 9° – 30° |
| March | 42° | 22° | 4.1" | 9.4" | 11 | 19 | 24° – 40° |
| April | 55° | 32° | 4.3" | 1.6" | 11 | 2 | 39° – 49° |
| May | 67° | 43° | 3.8" | 0.0" | 12 | 0 | 49° – 60° |
| June | 75° | 52° | 4.5" | 0.0" | 13 | 0 | 61° – 68° |
| July | 81° | 58° | 4.2" | 0.0" | 11 | 0 | 65° – 72° |
| August | 79° | 56° | 3.8" | 0.0" | 10 | 0 | 65° – 70° |
| September | 71° | 49° | 3.9" | 0.0" | 10 | 0 | 56° – 63° |
| October | 59° | 38° | 5.1" | 0.3" | 11 | 0 | 45° – 54° |
| November | 47° | 28° | 4.2" | 2.1" | 11 | 2 | 32° – 42° |
| December | 36° | 19° | 4.4" | 12.8" | 12 | 15 | 21° – 36° |
| Year | 56° | 35° | 49.0" | 61.9" | 132 | 91 |
How much a month can swing
A normal is an average. February swings the most: from 1991 to 2020 its average ranged from 9° to 30°. August is the most reliable, staying within 6°.
Where Milton’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 Milton’s center.
- Snow: Lakeport 2, NH.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Sanford 2 Nnw, ME, 12 miles from the town’s center, 280 ft lower; 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 Milton’s climate
What is the weather like in Milton?
A typical July afternoon reaches 81°, a January night drops to 12°, and about 62 inches of snow falls in a normal winter. Colder January nights than 91% of U.S. towns; cooler July afternoons than 90% of U.S. towns.
How cold does it get in Milton in winter?
January nights average 12°. About 156 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 Milton get?
About 62 inches in a normal winter at Lakeport 2, NH, most of it in January, with snow on the ground about 91 days a year.
How hot does it get in Milton?
July, with a typical high of 81° and a low of 58°. About 10 days a year reach 90° (Sanford 2 Nnw, ME).
When is the first and last frost in Milton?
In half of years the last spring frost (32°) comes by May 16 and the first fall frost by September 30, about 136 frost-free days, at Sanford 2 Nnw, ME.
What growing zone is Milton in?
Zone 6a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about −10°.
What is the best time of year to visit Milton?
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 Milton getting warmer?
Yes: 1991–2020 averaged 1.5° warmer than 1901–2000 on NOAA’s grid. A bigger shift than 61% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Milton.
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.