Photo: Ebyabe · CC BY-SA 2.5Boston’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 91°, a January night drops to 40°, and snow is almost unheard of.
A year in Boston at a glance
Each month’s typical high and low, and what it brings.
What stands out about Boston’s climate
Compared with towns across the U.S., with Boston’s place in Georgia beside it.
What a year in Boston feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 253 frost-free days a year
In half of years the last 32° night comes by March 11 and the first by November 18. Frost and day counts come from NOAA’s station at Quitman 2 Nw, GA, 13 miles from the town’s center, at about the same height.
The 2023 USDA map puts Boston’s center in zone 9a: 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 53 inches of rain a year
July is the wettest month and November the driest. Rain falls on about 105 days a year. Snow is rare: about 0.0" in a normal year at Monticello 5 Se, FL, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Boston
43% of the work is heating, so air conditioning is the bigger bill. Months averaging under 55° run from December through February.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Quitman 2 Nw, GA.
Living with Boston’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
253 frost-free days in zone 9a. The last frost comes by Mar 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 Nov 18.
Months with highs of 62–84° and lows of 40° or more: February, March, April, October, November and December.
Parks & trails →Of the yearly building losses FEMA expects in Boston from natural hazards, hurricanes are the largest share (42%); heat waves, cold waves, winter storms and ice storms together are 16%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Boston and similar climates
TownRatings has no climate map of the towns around Boston yet.
Climates most like Boston’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 |
|---|---|---|---|---|
| Boston, GA | 40° | 91° | 53" | 0.0" |
| Hanahan, SC | 38° | 92° | 50" | 0.3" |
| Yazoo City, MS | 37° | 92° | 56" | 0.1" |
| Pike Road, AL | 36° | 92° | 52" | 0.3" |
| Rusk, TX | 38° | 93° | 49" | 0.1" |
Temperatures and precipitation come from NOAA’s 5 km grid; snow and day counts from the stations named on this page.
Warmer than it used to be
The last 30 years in Boston averaged 0.7° warmer than the 1900s. The biggest change is in December (+1.4°).
A smaller shift than in 92% 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 Boston compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Boston’s place among Georgia’s.
Boston weather by month
Highs, lows and precipitation from NOAA’s grid at Boston’s center; snow, wet days and snow on the ground from Monticello 5 Se, FL. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 63° | 40° | 4.8" | 0.0" | 9 | 0 | 45° – 57° |
| February | 67° | 43° | 4.2" | 0.0" | 7 | 0 | 46° – 64° |
| March | 73° | 48° | 4.9" | 0.0" | 9 | 0 | 54° – 68° |
| April | 79° | 53° | 3.6" | 0.0" | 6 | 0 | 61° – 71° |
| May | 86° | 62° | 2.8" | 0.0" | 6 | 0 | 70° – 77° |
| June | 90° | 69° | 6.0" | 0.0" | 12 | 0 | 76° – 84° |
| July | 91° | 71° | 6.1" | 0.0" | 15 | 0 | 79° – 83° |
| August | 91° | 71° | 5.8" | 0.0" | 13 | 0 | 79° – 84° |
| September | 87° | 67° | 4.8" | 0.0" | 9 | 0 | 74° – 81° |
| October | 80° | 57° | 3.2" | 0.0" | 5 | 0 | 65° – 73° |
| November | 71° | 47° | 2.8" | 0.0" | 6 | 0 | 53° – 65° |
| December | 65° | 42° | 3.7" | 0.0" | 8 | 0 | 43° – 63° |
| Year | 78° | 56° | 52.6" | 0.0" | 105 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 43° to 63°. July is the most reliable, staying within 5°.
Where Boston’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 Boston’s center.
- Snow: Monticello 5 Se, FL.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Quitman 2 Nw, GA, 13 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 Boston’s climate
What is the weather like in Boston?
A typical July afternoon reaches 91°, a January night drops to 40°, and snow is almost unheard of. Milder January nights than 88% of U.S. towns; hotter July afternoons than 84% of U.S. towns.
How cold does it get in Boston in winter?
January nights average 40°. About 31 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 45°.
How much snow does Boston get?
About 0.0 inches in a normal winter at Monticello 5 Se, FL, so most winters see none.
How hot does it get in Boston?
July, with a typical high of 91° and a low of 71°. About 76 days a year reach 90° and 1 reach 100° (Quitman 2 Nw, GA).
When is the first and last frost in Boston?
In half of years the last spring frost (32°) comes by March 11 and the first fall frost by November 18, about 253 frost-free days, at Quitman 2 Nw, GA.
What growing zone is Boston in?
Zone 9a 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 Boston?
By one simple rule (highs of 62–84° and lows of 40° or more), February, March, April, October, November and December. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Boston getting warmer?
Yes: 1991–2020 averaged 0.7° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 92% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Boston.
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.