Clarks Hill, South Carolina climate: Normal weather by month, frost dates and records
Clarks Hill's normal year runs from 36°F January nights to 92°F July afternoons, with 46.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.8°C, January lows of 2°C, July highs of 33°C, 1,192 mm of precipitation a year.
- NOAA stationClarks Hill (1 mi W)
- Station IDUSC00381726
- Location33.66°N 82.19°W
- Elevation400 ft (122 m)
- Population (census place)125
On October 24, the normal high in Clarks Hill is 73°F and the normal low 51°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Clarks Hill.
- Jan 55° 36°
- Feb 59° 38°
- Mar 67° 44°
- Apr 76° 51°
- May 83° 60°
- Jun 89° 68°
- Jul 92° 72°
- Aug 91° 71°
- Sep 86° 65°
- Oct 76° 55°
- Nov 66° 44°
- Dec 58° 38°
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 Clarks Hill each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 36°F. The most precipitation falls in July (4.74 in), the least in October (3.04 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 55°F | 36°F | 45.7°F | 4.03 | – | <1 | 17 | 10 h 10 min |
| February | 59°F | 38°F | 48.5°F | 3.91 | – | <1 | 13 | 11 h |
| March | 67°F | 44°F | 55.5°F | 4.32 | – | <1 | 6 | 12 h |
| April | 76°F | 51°F | 63.5°F | 3.08 | – | 1 | 1 | 13 h |
| May | 83°F | 60°F | 71.3°F | 3.43 | – | 7 | <1 | 13 h 50 min |
| June | 89°F | 68°F | 78.4°F | 4.72 | – | 17 | <1 | 14 h 20 min |
| July | 92°F | 72°F | 82.0°F | 4.74 | – | 25 | <1 | 14 h 10 min |
| August | 91°F | 71°F | 80.6°F | 4.46 | – | 22 | <1 | 13 h 30 min |
| September | 86°F | 65°F | 75.2°F | 3.67 | – | 11 | <1 | 12 h 30 min |
| October | 76°F | 55°F | 65.3°F | 3.04 | – | 1 | 1 | 11 h 20 min |
| November | 66°F | 44°F | 54.6°F | 3.30 | – | <1 | 6 | 10 h 30 min |
| December | 58°F | 38°F | 48.0°F | 4.21 | – | <1 | 13 | 10 h |
| Year (annual) | 75°F | 53°F | 64.1°F | 46.91 | – | 82 | 57 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 13°C | 2°C | 7.6°C | 102 mm |
| February | 15°C | 3°C | 9.2°C | 99 mm |
| March | 19°C | 7°C | 13.1°C | 110 mm |
| April | 24°C | 11°C | 17.5°C | 78 mm |
| May | 28°C | 16°C | 21.8°C | 87 mm |
| June | 32°C | 20°C | 25.8°C | 120 mm |
| July | 33°C | 22°C | 27.8°C | 120 mm |
| August | 33°C | 21°C | 27.0°C | 113 mm |
| September | 30°C | 18°C | 24.0°C | 93 mm |
| October | 24°C | 13°C | 18.5°C | 77 mm |
| November | 19°C | 6°C | 12.6°C | 84 mm |
| December | 14°C | 3°C | 8.9°C | 107 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Johnston (21 miles away), gets 1 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00381726; 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 Clarks Hill?
Normal highs sit between 65°F and 85°F in March, April, May, October and November.
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 USC00381726.
When is the last frost in Clarks Hill?
In Clarks Hill, the last spring frost (32°F) comes after March 15 in half of years and after April 3 in one year in ten; the first autumn frost comes before November 18 in half of years and before November 3 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 151 year in 10 after April 3; 9 in 10 after February 22
- First autumn frost, half of years before
- November 181 year in 10 before November 3; 9 in 10 before December 12
NOAA puts the median frost-free season at 252 days, and the season without a hard freeze (28°F) at 289 days.
A hard freeze (28°F) comes after February 26 in half of springs and before December 8 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Clarks Hill in zone 8b in ZIP code 29821, the nearest ZIP area.
Frost dates for every NOAA station in South Carolina · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00381726; 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 Clarks Hill?
In a normal year in Clarks Hill, 82 days a year reach 90°F (6 of them 100°F or more) and 57 nights fall to 32°F or colder.
- Days at 90°F or more
- 82a normal year
- Days at 100°F or more
- 6a normal year
- Nights at 32°F or colder
- 57a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
The highest temperature in this station's record (since 1952) is 108°F, on August 22, 1983; the lowest is −2°F, on January 21, 1985.
The wettest calendar year on that record is 1964, with 76.28 in; the snowiest season is 1988–89, with 8.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00381726; records: ACIS (NOAA Regional Climate Centers), station USC00381726. Records use complete months only; a month missing more than three days is left out.
How sunny is Clarks Hill?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Clarks Hill, 4.6 kWh per square metre a day. June is the sunniest month (82%) and February the cloudiest (72%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 75% | 2.8 |
| February | 72% | 3.4 |
| March | 75% | 4.5 |
| April | 80% | 5.7 |
| May | 80% | 6.2 |
| June | 82% | 6.4 |
| July | 82% | 6.1 |
| August | 80% | 5.6 |
| September | 80% | 4.9 |
| October | 80% | 4.0 |
| November | 79% | 3.1 |
| December | 73% | 2.5 |
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 Clarks Hill need?
A normal year in Clarks Hill brings 2,467 heating degree days, 54% fewer than the median U.S. place (5,373), and 2,151 cooling degree days, 2.4 times 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 5,692 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 601 | 1 |
| February | 463 | 3 |
| March | 312 | 18 |
| April | 118 | 71 |
| May | 23 | 218 |
| June | 1 | 403 |
| July | 0 | 525 |
| August | 0 | 484 |
| September | 6 | 313 |
| October | 93 | 101 |
| November | 324 | 14 |
| December | 526 | 1 |
| Year (annual) | 2,467 | 2,151 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00381726. 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 Clarks Hill been warmer than normal lately?
2021 averaged 64.1°F, equal to the 1991-2020 normal of 64.1°F.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 64.1°F | at normal | 43.78 |
Over 46 complete years from 1953 to 2021, the station's annual mean temperature rose at a fitted 2.3°F per century (+0.13°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00381726; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Clarks Hill's climate compare?
Clarks Hill is warmer than 52 of the other 72 places with their own NOAA record in South Carolina, and wetter than 21. Across the 7,247 U.S. stations with normals, its annual mean of 64.1°F is warmer than 86%.
In the Köppen classification computed from these normals, Clarks Hill 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 Clarks Hill 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.
- Evans, GA37,718 people · 7 mi SE
- Martinez, GA33,019 people · 11 mi SE
- Grovetown, GA17,843 people · 15 mi S
- Harlem, GA4,076 people · 17 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 Clarks Hill's climate
What is the coldest month in Clarks Hill?
January, with a normal high of 55°F and a normal low of 36°F. The warmest is July (92°F by day, 72°F at night).
Does it snow in Clarks Hill?
Yes. NOAA publishes no 1991-2020 snowfall normal for Clarks Hill's NOAA station; the nearest record that keeps one, Johnston (21 miles away), records 1 inches of snow in a normal year.
What is the rainiest month in Clarks Hill?
July, with 4.74 in of precipitation in a normal year; the driest is October with 3.04 in.
What plant hardiness zone is Clarks Hill in?
The USDA's 2023 map puts Clarks Hill in zone 8b in ZIP code 29821, the nearest ZIP area.
How late can frost come in Clarks Hill?
In half of years the last 32°F night comes after March 15; in one year in ten it comes after April 3. Waiting until April 3 leaves about a one-in-ten chance of a later frost.
Nearby and next
- South Carolina climateThe statewide normals and every place in the state
- Appling, GA11 miles from this station, 63.1°F a year
- McCormick, SC18 miles from this station, 62.5°F a year
- Edgefield, SC19 miles from this station, 63.7°F a year
- Johnston, SC21 miles from this station, 62.7°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made