Jamestown, South Carolina climate: Normal weather by month, frost dates and records
Jamestown's normal year runs from 35°F January nights to 93°F July afternoons, with 51.9 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 18.1°C, January lows of 2°C, July highs of 34°C, 1,317 mm of precipitation a year.
- NOAA stationJamestown
- Station IDUSC00384449
- Location33.28°N 79.70°W
- Elevation35 ft (11 m)
- Population73
On October 23, the normal high in Jamestown is 76°F and the normal low 51°F.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Jamestown.
- Jan 60° 35°
- Feb 63° 37°
- Mar 69° 42°
- Apr 78° 50°
- May 84° 59°
- Jun 90° 68°
- Jul 93° 71°
- Aug 91° 70°
- Sep 86° 65°
- Oct 78° 53°
- Nov 69° 42°
- Dec 62° 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 Jamestown each month?
July is the warmest month, with normal highs of 93°F; January the coldest, with normal lows of 35°F. The most precipitation falls in August (6.46 in), the least in November (3.26 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 60°F | 35°F | 47.2°F | 3.45 | – | <1 | 15 | 10 h 10 min |
| February | 63°F | 37°F | 49.6°F | 3.27 | – | <1 | 10 | 11 h |
| March | 69°F | 42°F | 55.8°F | 3.75 | – | <1 | 7 | 12 h |
| April | 78°F | 50°F | 63.9°F | 3.32 | – | 1 | <1 | 13 h |
| May | 84°F | 59°F | 71.6°F | 3.29 | – | 8 | <1 | 13 h 50 min |
| June | 90°F | 68°F | 78.6°F | 5.48 | – | 19 | <1 | 14 h 20 min |
| July | 93°F | 71°F | 81.8°F | 5.97 | – | 26 | <1 | 14 h 10 min |
| August | 91°F | 70°F | 80.6°F | 6.46 | – | 23 | <1 | 13 h 30 min |
| September | 86°F | 65°F | 75.5°F | 5.28 | – | 12 | <1 | 12 h 30 min |
| October | 78°F | 53°F | 65.8°F | 4.63 | – | 2 | <1 | 11 h 20 min |
| November | 69°F | 42°F | 55.7°F | 3.26 | – | <1 | 7 | 10 h 30 min |
| December | 62°F | 38°F | 49.6°F | 3.69 | – | <1 | 9 | 10 h |
| Year (annual) | 77°F | 52°F | 64.6°F | 51.85 | – | 91 | 48 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 2°C | 8.4°C | 88 mm |
| February | 17°C | 3°C | 9.8°C | 83 mm |
| March | 21°C | 6°C | 13.2°C | 95 mm |
| April | 26°C | 10°C | 17.7°C | 84 mm |
| May | 29°C | 15°C | 22.0°C | 84 mm |
| June | 32°C | 20°C | 25.9°C | 139 mm |
| July | 34°C | 22°C | 27.7°C | 152 mm |
| August | 33°C | 21°C | 27.0°C | 164 mm |
| September | 30°C | 18°C | 24.2°C | 134 mm |
| October | 26°C | 12°C | 18.8°C | 118 mm |
| November | 21°C | 6°C | 13.2°C | 83 mm |
| December | 16°C | 3°C | 9.8°C | 94 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Moncks Corner (17 miles away), gets 0 inches of snow in a normal year; elevation and distance can change that.
Source: NOAA NCEI 1991-2020 monthly normals, station USC00384449; 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 Jamestown?
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 USC00384449.
When is the last frost in Jamestown?
In Jamestown, the last spring frost (32°F) comes after March 22 in half of years and after April 8 in one year in ten; the first autumn frost comes before November 13 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 221 year in 10 after April 8; 9 in 10 after February 28
- First autumn frost, half of years before
- November 131 year in 10 before November 1; 9 in 10 before December 4
NOAA puts the median frost-free season at 238 days, and the season without a hard freeze (28°F) at 269 days.
A hard freeze (28°F) comes after March 6 in half of springs and before November 28 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Jamestown in zone 8b in ZIP code 29453, 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 USC00384449; 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 Jamestown?
In a normal year in Jamestown, 91 days a year reach 90°F (3 of them 100°F or more) and 48 nights fall to 32°F or colder.
- Days at 90°F or more
- 91a normal year
- Days at 100°F or more
- 3a normal year
- Nights at 32°F or colder
- 48a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
Source: NOAA NCEI 1991-2020 annual normals, station USC00384449.
How sunny is Jamestown?
Over a year 79% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Jamestown, 4.6 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 | 76% | 4.5 |
| April | 81% | 5.8 |
| May | 81% | 6.3 |
| June | 81% | 6.4 |
| July | 82% | 6.2 |
| August | 79% | 5.5 |
| September | 78% | 4.8 |
| October | 80% | 4.0 |
| November | 80% | 3.1 |
| December | 77% | 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 Jamestown need?
A normal year in Jamestown brings 2,274 heating degree days, 58% fewer than the median U.S. place (5,373), and 2,161 cooling degree days, 2.4 times the median (908). Four months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,863 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 555 | 2 |
| February | 434 | 3 |
| March | 306 | 19 |
| April | 102 | 69 |
| May | 16 | 219 |
| June | 0 | 406 |
| July | 0 | 521 |
| August | 0 | 482 |
| September | 2 | 317 |
| October | 78 | 101 |
| November | 298 | 18 |
| December | 483 | 4 |
| Year (annual) | 2,274 | 2,161 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00384449. 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 Jamestown been warmer than normal lately?
2024 averaged 66.5°F, 1.9°F above the 1991-2020 normal of 64.6°F. 2 of the 2 complete years since 2023 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2023 | 65.8°F | +1.2°F | 57.82 |
| 2024 | 66.5°F | +1.9°F | 61.27 |
Source: observed years: ACIS, station USC00384449. A year counts only with all twelve months complete.
How does Jamestown's climate compare?
Jamestown is warmer than 60 of the other 72 places with their own NOAA record in South Carolina, and wetter than 50. Across the 7,247 U.S. stations with normals, its annual mean of 64.6°F is warmer than 87%.
In the Köppen classification computed from these normals, Jamestown 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.
Questions about Jamestown's climate
What is the coldest month in Jamestown?
January, with a normal high of 60°F and a normal low of 35°F. The warmest is July (93°F by day, 71°F at night).
Does it snow in Jamestown?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Jamestown's NOAA station; the nearest record that keeps one, Moncks Corner (17 miles away), records 0 inches of snow in a normal year.
What is the rainiest month in Jamestown?
August, with 6.46 in of precipitation in a normal year; the driest is November with 3.26 in.
What plant hardiness zone is Jamestown in?
The USDA's 2023 map puts Jamestown in zone 8b in ZIP code 29453, the nearest ZIP area.
How late can frost come in Jamestown?
In half of years the last 32°F night comes after March 22; in one year in ten it comes after April 8. Waiting until April 8 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
- Andrews, SC13 miles from this station, 63.5°F a year
- Moncks Corner, SC17 miles from this station, 66.1°F a year
- McClellanville, SC21 miles from this station, 65.1°F a year
- Georgetown, SC22 miles from this station, 65.1°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made