Suwanee’s winters are milder and less snowy than most of the U.S.
A typical July afternoon reaches 88°, a January night drops to 32°, and snow is almost unheard of.
A year in Suwanee at a glance
Each month’s typical high and low, and what it brings.
What stands out about Suwanee’s climate
Compared with towns across the U.S., with Suwanee’s place in Georgia beside it.
What a year in Suwanee feels like
Typical highs and lows by season and by month, from NOAA’s 30-year normals.
About 214 frost-free days a year
In half of years the last 32° night comes by April 4 and the first by November 4. Frost and day counts come from NOAA’s station at Cumming 2n, GA, 13 miles from the town’s center, 140 ft higher.
The 2023 USDA map puts Suwanee’s center in zone 8a: the coldest night of a typical winter, averaged over 1991–2020, reaches about 14°. 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 54 inches of rain a year
March is the wettest month and October the driest. Rain falls on about 120 days a year. Snow is rare: about 0.6" in a normal year at Cumming 2n, GA, so most winters see none.
Rain + melted snow by month
Inches of water
Heating and cooling a home in Suwanee
69% of the work is heating. Months averaging under 55° run from November through March.
Degree days add up how far each day’s average falls below (heating) or rises above (cooling) 65° over a year. NOAA normals at Cumming 2n, GA.
Living with Suwanee’s climate
What the numbers mean for a garden, a free afternoon and a bad-weather day.
214 frost-free days in zone 8a. The last frost comes by Apr 4 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 4.
Months with highs of 62–84° and lows of 40° or more: March, April, May, September and October. 4.5 miles of trails are waiting.
Parks & trails →Of the yearly building losses FEMA expects in Suwanee from natural hazards, river flooding is the largest share (67%); heat waves, cold waves, winter storms and ice storms together are 7%. Normals are averages; the hazards page covers the extremes.
Natural hazards →Suwanee and its neighbors
Every town next door is within a degree of Suwanee in January and July, closer than the 5 km grid can tell apart. Tap a town to see its climate.
Climates most like Suwanee’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 |
|---|---|---|---|---|
| Suwanee, GA | 32° | 88° | 54" | 0.6" |
| Williamston, NC | 32° | 89° | 51" | 0.5" |
| Hartselle, AL | 31° | 90° | 55" | 1.1" |
| Little River, SC | 36° | 89° | 53" | 0.5" |
| Brentwood, TN | 29° | 89° | 53" | 1.7" |
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 Suwanee averaged 0.8° warmer than the 1900s. The biggest change is in December (+2.2°).
A smaller shift than in 90% 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 Suwanee compares
Against 12,954 U.S. towns of 2,500 or more (one per 5 km climate cell), with Suwanee’s place among Georgia’s.
Suwanee weather by month
Highs, lows and precipitation from NOAA’s grid at Suwanee’s center; snow, wet days and snow on the ground from Cumming 2n, GA. 1991–2020 normals.
| Month | High | Low | Rain + melt | Snow | Wet days | Snow on ground | 30-yr range |
|---|---|---|---|---|---|---|---|
| January | 52° | 32° | 4.8" | 0.1" | 11 | 0 | 34° – 48° |
| February | 56° | 35° | 4.9" | 0.2" | 11 | 0 | 37° – 54° |
| March | 64° | 41° | 5.1" | 0.3" | 11 | 0 | 46° – 62° |
| April | 72° | 48° | 4.0" | 0.0" | 9 | 0 | 56° – 65° |
| May | 79° | 57° | 4.0" | 0.0" | 11 | 0 | 63° – 73° |
| June | 86° | 64° | 4.8" | 0.0" | 11 | 0 | 70° – 79° |
| July | 88° | 68° | 4.6" | 0.0" | 12 | 0 | 76° – 82° |
| August | 87° | 67° | 4.6" | 0.0" | 10 | 0 | 74° – 83° |
| September | 82° | 61° | 4.1" | 0.0" | 8 | 0 | 69° – 78° |
| October | 73° | 50° | 3.8" | 0.0" | 8 | 0 | 58° – 66° |
| November | 63° | 40° | 4.3" | 0.0" | 9 | 0 | 46° – 57° |
| December | 54° | 35° | 4.7" | 0.0" | 11 | 0 | 35° – 54° |
| Year | 71° | 50° | 53.5" | 0.6" | 120 | 0 |
How much a month can swing
A normal is an average. December swings the most: from 1991 to 2020 its average ranged from 35° to 54°. July is the most reliable, staying within 6°.
Where Suwanee’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 Suwanee’s center.
- Snow: Cumming 2n, GA.
- Frost, freezing nights, 90° and 100° days, heating and cooling: Cumming 2n, GA, 13 miles from the town’s center, 140 ft higher; 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 Suwanee’s climate
What is the weather like in Suwanee?
A typical July afternoon reaches 88°, a January night drops to 32°, and snow is almost unheard of. Milder January nights than 75% of U.S. towns; hotter July afternoons than 70% of U.S. towns.
How cold does it get in Suwanee in winter?
January nights average 32°. About 67 nights a year reach 32° or below. In the coldest January of the last 30 years the month averaged 34°.
How much snow does Suwanee get?
About 0.6 inches in a normal winter at Cumming 2n, GA, so most winters see none.
How hot does it get in Suwanee?
July, with a typical high of 88° and a low of 68°. About 32 days a year reach 90° (Cumming 2n, GA).
When is the first and last frost in Suwanee?
In half of years the last spring frost (32°) comes by April 4 and the first fall frost by November 4, about 214 frost-free days, at Cumming 2n, GA.
What growing zone is Suwanee in?
Zone 8a on the 2023 USDA Plant Hardiness Zone Map: the coldest night of a typical winter reaches about 14°.
What is the best time of year to visit Suwanee?
By one simple rule (highs of 62–84° and lows of 40° or more), March, April, May, September and October. The rule is ours, not NOAA’s; the month table has the numbers to judge by.
Is Suwanee getting warmer?
Yes: 1991–2020 averaged 0.8° warmer than 1901–2000 on NOAA’s grid. A smaller shift than 90% of U.S. towns.
Neighbors talk weather
Gardens, snow, and the best days of the year in Suwanee.
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.