Hartsville, South Carolina climate: Normal weather by month, frost dates and records
Hartsville's normal year runs from 32°F January nights to 92°F July afternoons, with 48.5 inches of precipitation and less than an inch of snow (0.5 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 16.9°C, January lows of 0°C, July highs of 33°C, 1,232 mm of precipitation a year.
- NOAA stationHartsville
- Station IDUSC00383990
- Location34.40°N 80.05°W
- Elevation185 ft (56 m)
- Population7,360
On October 23, the normal high in Hartsville is 73°F and the normal low 47°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 Hartsville.
- Jan 55° 32°
- Feb 59° 34°
- Mar 66° 40°
- Apr 76° 48°
- May 82° 58°
- Jun 89° 67°
- Jul 92° 70°
- Aug 90° 69°
- Sep 85° 63°
- Oct 76° 51°
- Nov 65° 40°
- Dec 58° 35°
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 Hartsville each month?
July is the warmest month, with normal highs of 92°F; January the coldest, with normal lows of 32°F. The most precipitation falls in July (5.91 in), the least in November (2.91 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 55°F | 32°F | 43.4°F | 3.73 | 10 | <1 | 18 | 10 h 10 min |
| February | 59°F | 34°F | 46.4°F | 3.35 | 9 | <1 | 13 | 11 h |
| March | 66°F | 40°F | 53.2°F | 3.76 | 9 | <1 | 7 | 11 h 50 min |
| April | 76°F | 48°F | 61.9°F | 2.98 | 8 | 2 | 1 | 13 h |
| May | 82°F | 58°F | 70.1°F | 3.90 | 9 | 6 | <1 | 14 h |
| June | 89°F | 67°F | 77.6°F | 4.64 | 11 | 16 | <1 | 14 h 30 min |
| July | 92°F | 70°F | 81.1°F | 5.91 | 12 | 22 | <1 | 14 h 20 min |
| August | 90°F | 69°F | 79.6°F | 5.20 | 10 | 19 | <1 | 13 h 30 min |
| September | 85°F | 63°F | 74.0°F | 4.92 | 8 | 9 | <1 | 12 h 30 min |
| October | 76°F | 51°F | 63.1°F | 3.41 | 7 | 1 | 1 | 11 h 20 min |
| November | 65°F | 40°F | 52.6°F | 2.91 | 7 | <1 | 8 | 10 h 20 min |
| December | 58°F | 35°F | 46.1°F | 3.81 | 10 | <1 | 14 | 9 h 50 min |
| Year (annual) | 74°F | 51°F | 62.4°F | 48.52 | 108 | 74 | 62 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 13°C | 0°C | 6.3°C | 95 mm |
| February | 15°C | 1°C | 8.0°C | 85 mm |
| March | 19°C | 4°C | 11.8°C | 96 mm |
| April | 24°C | 9°C | 16.6°C | 76 mm |
| May | 28°C | 14°C | 21.2°C | 99 mm |
| June | 32°C | 19°C | 25.3°C | 118 mm |
| July | 33°C | 21°C | 27.3°C | 150 mm |
| August | 32°C | 21°C | 26.4°C | 132 mm |
| September | 29°C | 17°C | 23.3°C | 125 mm |
| October | 24°C | 10°C | 17.3°C | 87 mm |
| November | 19°C | 4°C | 11.4°C | 74 mm |
| December | 14°C | 1°C | 7.8°C | 97 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00383990; 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 Hartsville?
Normal highs sit between 65°F and 85°F in March, April, May, September, October and November. Of those, November 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 USC00383990.
When is the last frost in Hartsville?
In Hartsville, the last spring frost (32°F) comes after March 30 in half of years and after April 13 in one year in ten; the first autumn frost comes before November 6 in half of years and before October 26 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 301 year in 10 after April 13; 9 in 10 after March 11
- First autumn frost, half of years before
- November 61 year in 10 before October 26; 9 in 10 before November 23
NOAA puts the median frost-free season at 224 days, and the season without a hard freeze (28°F) at 249 days.
A hard freeze (28°F) comes after March 16 in half of springs and before November 18 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Hartsville in zone 8b in ZIP code 29550, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Hartsville's NOAA station is in zone 8a: the coldest night of a typical year reaches 15°F (23 complete years); the map interpolates between stations and terrain, so the station and the ZIP area can differ by half a zone.
Frost dates for every NOAA station in South Carolina · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00383990; 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 Hartsville?
In a normal year in Hartsville, 74 days a year reach 90°F (3 of them 100°F or more), 62 nights fall to 32°F or colder and 108 days bring measurable precipitation.
- Days at 90°F or more
- 74a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 62a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 108a normal year
The highest temperature in this station's record (since 1947) is 108°F, on August 2, 1999; the lowest is 8°F, on January 24, 2003.
The wettest calendar year on that record is 2018, with 70.09 in; the snowiest season is 2009–10, with 3.8 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00383990; records: ACIS (NOAA Regional Climate Centers), station USC00383990. Records use complete months only; a month missing more than three days is left out.
How sunny is Hartsville?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Hartsville, 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 | 76% | 2.8 |
| February | 72% | 3.4 |
| March | 74% | 4.5 |
| April | 79% | 5.7 |
| May | 79% | 6.1 |
| June | 82% | 6.4 |
| July | 81% | 6.2 |
| August | 80% | 5.5 |
| September | 79% | 4.8 |
| October | 79% | 3.9 |
| November | 79% | 3.0 |
| December | 74% | 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 Hartsville need?
A normal year in Hartsville brings 2,867 heating degree days, 47% fewer than the median U.S. place (5,373), and 1,955 cooling degree days, 2.2 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 5,336 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 671 | 1 |
| February | 522 | 3 |
| March | 378 | 12 |
| April | 153 | 60 |
| May | 34 | 190 |
| June | 2 | 380 |
| July | 0 | 499 |
| August | 0 | 451 |
| September | 8 | 277 |
| October | 130 | 71 |
| November | 382 | 8 |
| December | 589 | 3 |
| Year (annual) | 2,867 | 1,955 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00383990. 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 Hartsville been warmer than normal lately?
2025 averaged 63.0°F, 0.6°F above the 1991-2020 normal of 62.4°F. 5 of the 5 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 63.0°F | +0.6°F | 41.75 |
| 2022 | 63.2°F | +0.8°F | 46.99 |
| 2023 | 63.5°F | +1.1°F | 45.48 |
| 2024 | 63.9°F | +1.5°F | 49.45 |
| 2025 | 63.0°F | +0.6°F | 39.17 |
Source: observed years: ACIS, station USC00383990. A year counts only with all twelve months complete.
How does Hartsville's climate compare?
Hartsville is warmer than 28 of the other 72 places with their own NOAA record in South Carolina, and wetter than 30. Across the 7,247 U.S. stations with normals, its annual mean of 62.4°F is warmer than 81%.
In the Köppen classification computed from these normals, Hartsville 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 Hartsville share this climate record?
3 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.
- North Hartsville, SC3,217 people · 1 mi W
- McBee, SC812 people · 13 mi NW
- Pine Ridge, SC595 people · 7 mi W
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 Hartsville's climate
What is the coldest month in Hartsville?
January, with a normal high of 55°F and a normal low of 32°F. The warmest is July (92°F by day, 70°F at night).
Does it snow in Hartsville?
Rarely: NOAA's normal is 0.5 inch a year.
What is the rainiest month in Hartsville?
July, with 5.91 in of precipitation in a normal year; the driest is November with 2.91 in.
What plant hardiness zone is Hartsville in?
The USDA's 2023 map puts Hartsville in zone 8b in ZIP code 29550, the nearest ZIP area. By the same method at Hartsville's NOAA station, the coldest night of a typical year reaches 15°F (23 years, 1991-2020): zone 8a.
How late can frost come in Hartsville?
In half of years the last 32°F night comes after March 30; in one year in ten it comes after April 13. Waiting until April 13 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
- Darlington, SC12 miles from this station, 62.8°F a year
- Bishopville, SC16 miles from this station, 62.6°F a year
- Elliott, SC21 miles from this station, 63.0°F a year
- Chesterfield, SC23 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