Hartwell, Georgia climate: Normal weather by month, frost dates and records
Hartwell's normal year runs from 33°F January nights to 89°F July afternoons, with 51.8 inches of precipitation and less than an inch of snow (0.9 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.3°C, January lows of 0°C, July highs of 32°C, 1,316 mm of precipitation a year.
- NOAA stationHartwell
- Station IDUSC00094133
- Location34.35°N 82.93°W
- Elevation805 ft (245 m)
- From the centerunder 1 mile
- Population4,701
On October 23, the normal high in Hartwell is 70°F and the normal low 49°F, and the chance of measurable rain or snow is 24%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Hartwell.
- Jan 52° 33°
- Feb 56° 35°
- Mar 64° 42°
- Apr 72° 49°
- May 79° 59°
- Jun 86° 66°
- Jul 89° 70°
- Aug 87° 69°
- Sep 82° 64°
- Oct 72° 52°
- Nov 62° 41°
- Dec 55° 36°
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 Hartwell each month?
July is the warmest month, with normal highs of 89°F; January the coldest, with normal lows of 33°F. The most precipitation falls in December (4.88 in), the least in April (3.48 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 52°F | 33°F | 42.4°F | 4.52 | 10 | <1 | 16 | 10 h 10 min |
| February | 56°F | 35°F | 45.6°F | 4.58 | 10 | <1 | 11 | 11 h |
| March | 64°F | 42°F | 52.7°F | 4.85 | 10 | <1 | 5 | 11 h 50 min |
| April | 72°F | 49°F | 60.8°F | 3.48 | 9 | <1 | <1 | 13 h |
| May | 79°F | 59°F | 68.8°F | 3.78 | 9 | 1 | <1 | 14 h |
| June | 86°F | 66°F | 76.1°F | 4.72 | 10 | 7 | <1 | 14 h 30 min |
| July | 89°F | 70°F | 79.4°F | 4.42 | 10 | 15 | <1 | 14 h 20 min |
| August | 87°F | 69°F | 78.2°F | 4.39 | 10 | 9 | <1 | 13 h 30 min |
| September | 82°F | 64°F | 72.7°F | 4.33 | 8 | 3 | <1 | 12 h 30 min |
| October | 72°F | 52°F | 62.1°F | 3.78 | 7 | <1 | <1 | 11 h 20 min |
| November | 62°F | 41°F | 51.8°F | 4.09 | 9 | <1 | 4 | 10 h 20 min |
| December | 55°F | 36°F | 45.1°F | 4.88 | 10 | <1 | 12 | 9 h 50 min |
| Year (annual) | 71°F | 51°F | 61.3°F | 51.82 | 111 | 36 | 49 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 11°C | 0°C | 5.8°C | 115 mm |
| February | 13°C | 2°C | 7.6°C | 116 mm |
| March | 18°C | 5°C | 11.5°C | 123 mm |
| April | 22°C | 10°C | 16.0°C | 88 mm |
| May | 26°C | 15°C | 20.4°C | 96 mm |
| June | 30°C | 19°C | 24.5°C | 120 mm |
| July | 32°C | 21°C | 26.3°C | 112 mm |
| August | 31°C | 21°C | 25.7°C | 112 mm |
| September | 28°C | 18°C | 22.6°C | 110 mm |
| October | 22°C | 11°C | 16.7°C | 96 mm |
| November | 17°C | 5°C | 11.0°C | 104 mm |
| December | 13°C | 2°C | 7.3°C | 124 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00094133; 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 Hartwell?
Normal highs sit between 65°F and 85°F in April, May, September and October. Of those, October has the fewest days with rain (7).
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 USC00094133.
When is the last frost in Hartwell?
In Hartwell, the last spring frost (32°F) comes after March 20 in half of years and after April 6 in one year in ten; the first autumn frost comes before November 15 in half of years and before November 1 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
- March 201 year in 10 after April 6; 9 in 10 after March 1
- First autumn frost, half of years before
- November 151 year in 10 before November 1; 9 in 10 before December 5
NOAA puts the median frost-free season at 241 days, and the season without a hard freeze (28°F) at 269 days.
A hard freeze (28°F) comes after March 7 in half of springs and before December 1 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hartwell in zone 8a in ZIP code 30643, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hartwell's NOAA station is in zone 8a: the coldest night of a typical year reaches 15°F (19 complete years).
Frost dates for every NOAA station in Georgia · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00094133; USDA 2023 Plant Hardiness Zone Map, ZIP listings: PRISM Group, Oregon State University, https://prism.oregonstate.edu, accessed October 8, 2026; the station zone: ACIS daily lows, 1991-2020. 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 Hartwell?
In a normal year in Hartwell, 36 days a year reach 90°F, 49 nights fall to 32°F or colder and 111 days bring measurable precipitation.
- Days at 90°F or more
- 36a normal year
- Days at 100°F or more
- fewer than 1a normal year
- Nights at 32°F or colder
- 49a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 111a normal year
The highest temperature in this station's record (since 1908) is 109°F, on July 29, 1952; the lowest is −5°F, on January 26, 1940.
The wettest calendar year on that record is 2020, with 73.89 in; the snowiest season is 1935–36, with 13.1 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00094133; records: ACIS (NOAA Regional Climate Centers), station USC00094133. Records use complete months only; a month missing more than three days is left out.
How sunny is Hartwell?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hartwell, 4.6 kWh per square metre a day. June is the sunniest month (82%) and February the cloudiest (71%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.7 |
| February | 71% | 3.4 |
| March | 74% | 4.4 |
| April | 79% | 5.7 |
| May | 79% | 6.2 |
| June | 82% | 6.5 |
| July | 81% | 6.2 |
| August | 81% | 5.7 |
| September | 80% | 4.9 |
| October | 79% | 4.0 |
| November | 79% | 3.1 |
| December | 73% | 2.4 |
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 Hartwell need?
A normal year in Hartwell brings 3,004 heating degree days, 44% fewer than the median U.S. place (5,373), and 1,688 cooling degree days, 86% 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 4,950 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 699 | 0 |
| February | 545 | 0 |
| March | 387 | 7 |
| April | 165 | 40 |
| May | 37 | 155 |
| June | 2 | 335 |
| July | 0 | 446 |
| August | 0 | 409 |
| September | 9 | 240 |
| October | 141 | 50 |
| November | 401 | 5 |
| December | 619 | 0 |
| Year (annual) | 3,004 | 1,688 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00094133. 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 Hartwell been warmer than normal lately?
2025 averaged 62.3°F, 1.0°F above the 1991-2020 normal of 61.3°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 61.8°F | +0.5°F | 54.59 |
| 2023 | 62.5°F | +1.2°F | 53.49 |
| 2024 | 63.2°F | +1.9°F | 53.41 |
| 2025 | 62.3°F | +1.0°F | 48.89 |
Over 72 complete years from 1917 to 2025, the station's annual mean temperature rose at a fitted 0.2°F per century (+0.01°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00094133; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Hartwell's climate compare?
Hartwell is warmer than 23 of the other 100 places with their own NOAA record in Georgia, and wetter than 54. Across the 7,247 U.S. stations with normals, its annual mean of 61.3°F is warmer than 78%.
In the Köppen classification computed from these normals, Hartwell 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 Hartwell share this climate record?
9 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.
- Royston, GA2,665 people · 11 mi SW
- Iva, SC1,191 people · 16 mi E
- Franklin Springs, GA1,181 people · 13 mi W
- Canon, GA705 people · 10 mi W
- Fair Play, SC578 people · 11 mi N
- Bowersville, GA427 people · 9 mi W
- South Union, SC333 people · 16 mi NW
- Starr, SC174 people · 13 mi E
- Eagle Grove, GA23 people · 6 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.
What do Hartwell's other NOAA stations record?
One more NOAA station keeps 1991-2020 normals in or near Hartwell. This page uses Hartwell; the other differs by site and elevation:
| Station | From the center | Elevation | Year | Jan low | Jul high | Precip. | Snow | Last frost |
|---|---|---|---|---|---|---|---|---|
| Hartwell Dam USC00094138 | 5 mi E | 690 ft | 61.8°F | 32°F | 91°F | 50.4 | – | March 25 |
Source: NOAA NCEI 1991-2020 normals for each station. Last frost: the median last spring date of 32°F.
Questions about Hartwell's climate
What is the coldest month in Hartwell?
January, with a normal high of 52°F and a normal low of 33°F. The warmest is July (89°F by day, 70°F at night).
Does it snow in Hartwell?
Rarely: NOAA's normal is 0.9 inch a year.
What is the rainiest month in Hartwell?
December, with 4.88 in of precipitation in a normal year; the driest is April with 3.48 in.
What plant hardiness zone is Hartwell in?
The USDA's 2023 map puts Hartwell in zone 8a in ZIP code 30643, the nearest ZIP area. By the same method at Hartwell's NOAA station, the coldest night of a typical year reaches 15°F (19 years, 1991-2020): zone 8a.
How late can frost come in Hartwell?
In half of years the last 32°F night comes after March 20; in one year in ten it comes after April 6. Waiting until April 6 leaves about a one-in-ten chance of a later frost.
Nearby and next
- Georgia climateThe statewide normals and every place in the state
- Elberton, GA15 miles from this station, 60.2°F a year
- Anderson, SC16 miles from this station, 61.9°F a year
- Sandy Springs, SC21 miles from this station, 59.9°F a year
- Clemson, SC22 miles from this station, 61.4°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made