Dillon, South Carolina climate: Normal weather by month, frost dates and records
Dillon's normal year runs from 32°F January nights to 92°F July afternoons, with 48.6 inches of precipitation and less than an inch of snow (0.8 in) a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.1°C, January lows of 0°C, July highs of 33°C, 1,235 mm of precipitation a year.
- NOAA stationDillon
- Station IDUSC00382386
- Location34.41°N 79.36°W
- Elevation118 ft (36 m)
- From the center1 miles
- Population6,244
On October 22, the normal high in Dillon is 75°F and the normal low 48°F, and the chance of measurable rain or snow is 18%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Dillon.
- Jan 56° 32°
- Feb 60° 34°
- Mar 68° 40°
- Apr 76° 48°
- May 83° 57°
- Jun 89° 66°
- Jul 92° 70°
- Aug 90° 69°
- Sep 85° 63°
- Oct 76° 51°
- Nov 67° 40°
- Dec 59° 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 Dillon 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 (5.50 in), the least in November (3.11 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 56°F | 32°F | 44.1°F | 3.96 | 8 | <1 | 17 | 10 h 10 min |
| February | 60°F | 34°F | 47.0°F | 3.26 | 7 | <1 | 13 | 11 h |
| March | 68°F | 40°F | 53.6°F | 3.89 | 7 | <1 | 7 | 11 h 50 min |
| April | 76°F | 48°F | 62.0°F | 3.72 | 7 | <1 | 1 | 13 h |
| May | 83°F | 57°F | 70.1°F | 3.62 | 8 | 4 | <1 | 14 h |
| June | 89°F | 66°F | 77.5°F | 4.28 | 9 | 14 | <1 | 14 h 30 min |
| July | 92°F | 70°F | 81.1°F | 5.50 | 9 | 21 | <1 | 14 h 20 min |
| August | 90°F | 69°F | 79.5°F | 5.41 | 9 | 16 | <1 | 13 h 30 min |
| September | 85°F | 63°F | 73.9°F | 4.79 | 7 | 7 | <1 | 12 h 30 min |
| October | 76°F | 51°F | 63.6°F | 3.96 | 6 | 1 | <1 | 11 h 20 min |
| November | 67°F | 40°F | 53.4°F | 3.11 | 6 | <1 | 8 | 10 h 20 min |
| December | 59°F | 35°F | 46.8°F | 3.13 | 8 | <1 | 14 | 9 h 50 min |
| Year (annual) | 75°F | 50°F | 62.7°F | 48.63 | 90 | 63 | 59 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 13°C | 0°C | 6.7°C | 101 mm |
| February | 16°C | 1°C | 8.3°C | 83 mm |
| March | 20°C | 4°C | 12.0°C | 99 mm |
| April | 24°C | 9°C | 16.7°C | 94 mm |
| May | 28°C | 14°C | 21.2°C | 92 mm |
| June | 32°C | 19°C | 25.3°C | 109 mm |
| July | 33°C | 21°C | 27.3°C | 140 mm |
| August | 32°C | 20°C | 26.4°C | 137 mm |
| September | 30°C | 17°C | 23.3°C | 122 mm |
| October | 25°C | 11°C | 17.6°C | 101 mm |
| November | 19°C | 4°C | 11.9°C | 79 mm |
| December | 15°C | 1°C | 8.2°C | 80 mm |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00382386; 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 Dillon?
Normal highs sit between 65°F and 85°F in March, April, May, October and November. Of those, October 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 USC00382386.
When is the last frost in Dillon?
In Dillon, the last spring frost (32°F) comes after March 28 in half of years and after April 12 in one year in ten; the first autumn frost comes before November 8 in half of years and before October 27 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 281 year in 10 after April 12; 9 in 10 after March 9
- First autumn frost, half of years before
- November 81 year in 10 before October 27; 9 in 10 before November 25
NOAA puts the median frost-free season at 227 days, and the season without a hard freeze (28°F) at 253 days.
A hard freeze (28°F) comes after March 14 in half of springs and before November 20 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Dillon in zone 8b in ZIP code 29536, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Dillon's NOAA station is in zone 8b: the coldest night of a typical year reaches 17°F (15 complete years).
Frost dates for every NOAA station in South Carolina · Frost dates by ZIP code
Source: NOAA NCEI 1991-2020 annual normals (frost probabilities), station USC00382386; 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 Dillon?
In a normal year in Dillon, 63 days a year reach 90°F (2 of them 100°F or more), 59 nights fall to 32°F or colder and 90 days bring measurable precipitation.
- Days at 90°F or more
- 63a normal year
- Days at 100°F or more
- 2a normal year
- Nights at 32°F or colder
- 59a normal year
- Days that stay below freezing
- 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 90a normal year
The highest temperature in this station's record (since 1904) is 107°F, on June 28, 1954; the lowest is 2°F, on December 25, 1989.
The wettest calendar year on that record is 1971, with 63.67 in; the snowiest season is 1979–80, with 9.6 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00382386; records: ACIS (NOAA Regional Climate Centers), station USC00382386. Records use complete months only; a month missing more than three days is left out.
How sunny is Dillon?
Over a year 78% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Dillon, 4.5 kWh per square metre a day. July is the sunniest month (82%) and February the cloudiest (73%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 76% | 2.8 |
| February | 73% | 3.4 |
| March | 74% | 4.5 |
| April | 79% | 5.7 |
| May | 79% | 6.1 |
| June | 81% | 6.4 |
| July | 82% | 6.2 |
| August | 80% | 5.5 |
| September | 79% | 4.8 |
| October | 78% | 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 Dillon need?
A normal year in Dillon brings 2,752 heating degree days, 49% fewer than the median U.S. place (5,373), and 1,950 cooling degree days, 2.1 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 5,372 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 649 | 1 |
| February | 508 | 2 |
| March | 365 | 12 |
| April | 148 | 56 |
| May | 28 | 188 |
| June | 2 | 378 |
| July | 0 | 498 |
| August | 0 | 451 |
| September | 8 | 275 |
| October | 119 | 75 |
| November | 359 | 11 |
| December | 567 | 3 |
| Year (annual) | 2,752 | 1,950 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00382386. 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.
How does Dillon's climate compare?
Dillon is warmer than 32 of the other 72 places with their own NOAA record in South Carolina, and wetter than 33. Across the 7,247 U.S. stations with normals, its annual mean of 62.7°F is warmer than 82%.
In the Köppen classification computed from these normals, Dillon 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 Dillon share this climate record?
11 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.
- Fairmont, NC2,212 people · 15 mi NE
- Latta, SC1,242 people · 7 mi SW
- Newtown, SC969 people · 1 mi S
- Rowland, NC894 people · 10 mi N
- Hamer, SC735 people · 5 mi N
- Little Rock, SC560 people · 5 mi NW
- Elrod, NC245 people · 15 mi NE
- Floydale, SC236 people · 6 mi S
- Marietta, NC106 people · 13 mi E
- McDonald, NC95 people · 14 mi NE
- Raynham, NC63 people · 15 mi NE
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 Dillon's climate
What is the coldest month in Dillon?
January, with a normal high of 56°F and a normal low of 32°F. The warmest is July (92°F by day, 70°F at night).
Does it snow in Dillon?
Rarely: NOAA's normal is 0.8 inch a year.
What is the rainiest month in Dillon?
July, with 5.50 in of precipitation in a normal year; the driest is November with 3.11 in.
What plant hardiness zone is Dillon in?
The USDA's 2023 map puts Dillon in zone 8b in ZIP code 29536, the nearest ZIP area. By the same method at Dillon's NOAA station, the coldest night of a typical year reaches 17°F (15 years, 1991-2020): zone 8b.
How late can frost come in Dillon?
In half of years the last 32°F night comes after March 28; in one year in ten it comes after April 12. Waiting until April 12 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
- Mullins, SC16 miles from this station, 61.9°F a year
- Marion, SC17 miles from this station, 63.2°F a year
- Lumber River State Park, NC21 miles from this station, 61.6°F a year
- Lumberton, NC22 miles from this station, 63.5°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made