Summerville, Georgia climate: Normal weather by month, frost dates and records
Summerville's normal year runs from 29°F January nights to 90°F July afternoons, with 58.3 inches of precipitation and less than an inch of snow (0.3 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 15.4°C, January lows of −2°C, July highs of 32°C, 1,482 mm of precipitation a year.
- NOAA stationSummerville
- Station IDUSC00098436
- Location34.45°N 85.39°W
- Elevation639 ft (195 m)
- Population4,421
On October 23, the normal high in Summerville is 72°F and the normal low 43°F, and the chance of measurable rain or snow is 22%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Summerville.
- Jan 52° 29°
- Feb 57° 31°
- Mar 64° 37°
- Apr 73° 45°
- May 80° 55°
- Jun 87° 63°
- Jul 90° 67°
- Aug 89° 66°
- Sep 84° 59°
- Oct 75° 47°
- Nov 63° 36°
- Dec 55° 32°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
What is the weather like in Summerville each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 29°F. The most precipitation falls in December (6.32 in), the least in October (3.75 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 52°F | 29°F | 40.5°F | 5.01 | 10 | <1 | 21 | 10 h 10 min |
| February | 57°F | 31°F | 44.0°F | 5.37 | 9 | <1 | 17 | 11 h |
| March | 64°F | 37°F | 50.8°F | 6.14 | 10 | <1 | 10 | 11 h 50 min |
| April | 73°F | 45°F | 59.0°F | 4.95 | 8 | <1 | 2 | 13 h |
| May | 80°F | 55°F | 67.3°F | 4.37 | 9 | 2 | <1 | 14 h |
| June | 87°F | 63°F | 75.0°F | 4.93 | 10 | 12 | <1 | 14 h 30 min |
| July | 90°F | 67°F | 78.5°F | 4.29 | 9 | 18 | <1 | 14 h 20 min |
| August | 89°F | 66°F | 77.6°F | 4.32 | 9 | 18 | <1 | 13 h 30 min |
| September | 84°F | 59°F | 71.7°F | 4.24 | 6 | 10 | <1 | 12 h 30 min |
| October | 75°F | 47°F | 60.6°F | 3.75 | 7 | 1 | 3 | 11 h 20 min |
| November | 63°F | 36°F | 49.4°F | 4.64 | 8 | <1 | 14 | 10 h 20 min |
| December | 55°F | 32°F | 43.4°F | 6.32 | 9 | <1 | 18 | 9 h 50 min |
| Year (annual) | 72°F | 47°F | 59.8°F | 58.33 | 102 | 61 | 83 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 11°C | −2°C | 4.7°C | 127 mm |
| February | 14°C | 0°C | 6.7°C | 136 mm |
| March | 18°C | 3°C | 10.4°C | 156 mm |
| April | 23°C | 7°C | 15.0°C | 126 mm |
| May | 27°C | 13°C | 19.6°C | 111 mm |
| June | 30°C | 17°C | 23.9°C | 125 mm |
| July | 32°C | 19°C | 25.8°C | 109 mm |
| August | 32°C | 19°C | 25.3°C | 110 mm |
| September | 29°C | 15°C | 22.1°C | 108 mm |
| October | 24°C | 8°C | 15.9°C | 95 mm |
| November | 17°C | 2°C | 9.7°C | 118 mm |
| December | 13°C | 0°C | 6.3°C | 161 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00098436; annual normals. Wet days: 0.01 inch or more; 90°F days and freezing nights: NOAA's day counts. Daylight: sunrise to sunset on the 15th, computed from the latitude.
When is the best weather to visit Summerville?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, September has the fewest days with rain (6).
That is a measurement, not a recommendation: it counts the months whose normal afternoon high sits between 65°F and 85°F, where a light layer is enough by day.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00098436.
When is the last frost in Summerville?
In Summerville, the last spring frost (32°F) comes after April 7 in half of years and after April 23 in one year in ten; the first autumn frost comes before October 30 in half of years and before October 18 in one year in ten.
Frost-free in half of yearsFrost in 1 to 9 years out of 10Frost most years
- Last spring frost, half of years after
- April 71 year in 10 after April 23; 9 in 10 after March 20
- First autumn frost, half of years before
- October 301 year in 10 before October 18; 9 in 10 before November 10
NOAA puts the median frost-free season at 204 days, and the season without a hard freeze (28°F) at 227 days.
A hard freeze (28°F) comes after March 27 in half of springs and before November 7 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Summerville in zone 8a in ZIP code 30747, the nearest ZIP area.
Frost dates for every NOAA station in Georgia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00098436; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026. A 10% date means one year in ten has a frost after it in spring or before it in autumn.
How hot and how cold does it get in Summerville?
In a normal year in Summerville, 61 days a year reach 90°F (1 of them 100°F or more), 83 nights fall to 32°F or colder and 102 days bring measurable precipitation.
- Days at 90°F or more
- 61a normal year
- Days at 100°F or more
- 1a normal year
- Nights at 32°F or colder
- 83a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 102a normal year
Source: NOAA NCEI 1991-2020 annual normals, station USC00098436.
How sunny is Summerville?
Over a year 76% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Summerville, 4.4 kWh per square metre a day. August is the sunniest month (80%) and February the cloudiest (65%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 70% | 2.5 |
| February | 65% | 3.0 |
| March | 69% | 4.2 |
| April | 76% | 5.5 |
| May | 77% | 6.0 |
| June | 79% | 6.3 |
| July | 79% | 6.0 |
| August | 80% | 5.6 |
| September | 79% | 4.8 |
| October | 78% | 3.9 |
| November | 76% | 2.9 |
| December | 67% | 2.2 |
Source: NASA POWER solar climatology, 2001-2020 (CERES SYN1deg). Satellite-based, for the 1-degree cell (about 100 km across) around the station, so it describes the area rather than the airport.
How much heating and cooling does Summerville need?
A normal year in Summerville brings 3,395 heating degree days, 37% fewer than the median U.S. place (5,373), and 1,527 cooling degree days, 68% more than the median (908). Five months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 4,608 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 759 | 0 |
| February | 588 | 0 |
| March | 444 | 3 |
| April | 207 | 25 |
| May | 57 | 127 |
| June | 1 | 300 |
| July | 0 | 418 |
| August | 0 | 391 |
| September | 16 | 217 |
| October | 180 | 42 |
| November | 471 | 3 |
| December | 670 | 0 |
| Year (annual) | 3,395 | 1,527 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00098436. A degree day is one degree of a day's mean temperature below 65°F (heating) or above it (cooling); utilities use them to estimate energy use.
Has Summerville been warmer than normal lately?
2024 averaged 61.0°F, 1.2°F above the 1991-2020 normal of 59.8°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 60.1°F | +0.3°F | 77.42 |
| 2022 | 59.9°F | +0.1°F | 68.11 |
| 2023 | 61.0°F | +1.2°F | 54.75 |
| 2024 | 61.0°F | +1.2°F | 52.64 |
Source: observed years: ACIS, station USC00098436. A year counts only with all twelve months complete.
How does Summerville's climate compare?
Summerville is warmer than 10 of the other 100 places with their own NOAA record in Georgia, and wetter than 75. Across the 7,247 U.S. stations with normals, its annual mean of 59.8°F is warmer than 74%.
In the Köppen classification computed from these normals, Summerville is Cfa: temperate, no dry season, hot summer. What the classes mean.
Places with the most similar year elsewhere
Measured month by month on the normal high, low and precipitation, among places of 20,000 or more people in other states:
Source: NOAA NCEI 1991-2020 normals for every station PlainClimate covers. Similarity: the root-mean-square difference of the 36 monthly figures, precipitation weighted so an inch counts like 6°F.
Which places near Summerville share this climate record?
4 places have no NOAA station with 1991-2020 normals of their own, and this station is the nearest full record. A place's own climate can differ from these figures, by several degrees where it sits much higher or lower than the station, nearer the coast, or inside a large city's heat; for the larger places the next nearest records are named with their yearly mean, so the spread around them is visible, and places of 50,000 or more have their own page with NOAA's gridded normals.
- Trion, GA1,972 people · 8 mi NE
- Lyerly, GA463 people · 4 mi S
- Broomtown, AL222 people · 10 mi SW
- Gaylesville, AL177 people · 16 mi SW
Source: Census Bureau 2024 Gazetteer (place centers) and Vintage 2024 population estimates. Distance and direction from the station to each place's center.
Questions about Summerville's climate
What is the coldest month in Summerville?
January, with a normal high of 52°F and a normal low of 29°F. The warmest is July (90°F by day, 67°F at night).
Does it snow in Summerville?
Rarely: NOAA's normal is 0.3 inch a year.
What is the rainiest month in Summerville?
December, with 6.32 in of precipitation in a normal year; the driest is October with 3.75 in.
What plant hardiness zone is Summerville in?
The USDA's 2023 map puts Summerville in zone 8a in ZIP code 30747, the nearest ZIP area.
How late can frost come in Summerville?
In half of years the last 32°F night comes after April 7; in one year in ten it comes after April 23. Waiting until April 23 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Georgia climateThe statewide normals and every place in the state
- Rome, GA15 miles from this station, 61.8°F a year
- Valley Head, AL15 miles from this station, 58.8°F a year
- Fort Payne, AL19 miles from this station, 62.2°F a year
- Centre, AL27 miles from this station, 59.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made