Yemassee, South Carolina climate: Normal weather by month, frost dates and records
Yemassee's normal year runs from 36°F January nights to 90°F July afternoons, with 53.6 inches of precipitation a year. (NOAA 1991-2020 normals)
In metric: a yearly mean of 17.9°C, January lows of 2°C, July highs of 32°C, 1,361 mm of precipitation a year.
- NOAA stationYemassee (1 mi N)
- Station IDUSC00389469
- Location32.70°N 80.85°W
- Elevation44 ft (13 m)
- Population1,127
On October 23, the normal high in Yemassee is 74°F and the normal low 51°F, and the chance of measurable rain or snow is 25%.
Normals describe a typical year at the station, not a forecast. The National Weather Service forecast for Yemassee.
- Jan 59° 36°
- Feb 64° 39°
- Mar 70° 44°
- Apr 77° 51°
- May 83° 59°
- Jun 88° 67°
- Jul 90° 70°
- Aug 89° 70°
- Sep 84° 64°
- Oct 76° 54°
- Nov 68° 44°
- Dec 61° 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 Yemassee each month?
July is the warmest month, with normal highs of 90°F; January the coldest, with normal lows of 36°F. The most precipitation falls in June (6.67 in), the least in November (2.75 in).
| Month | High | Low | Mean | Precip. | Wet days | 90°F days | Freezing nights | Daylight |
|---|---|---|---|---|---|---|---|---|
| January | 59°F | 36°F | 47.7°F | 3.92 | 10 | <1 | 15 | 10 h 10 min |
| February | 64°F | 39°F | 51.3°F | 3.72 | 9 | <1 | 10 | 11 h |
| March | 70°F | 44°F | 56.8°F | 3.70 | 8 | <1 | 6 | 12 h |
| April | 77°F | 51°F | 63.8°F | 3.56 | 8 | 2 | 1 | 13 h |
| May | 83°F | 59°F | 71.2°F | 3.48 | 9 | 10 | <1 | 13 h 50 min |
| June | 88°F | 67°F | 77.2°F | 6.67 | 13 | 19 | <1 | 14 h 20 min |
| July | 90°F | 70°F | 80.1°F | 6.38 | 13 | 26 | <1 | 14 h 10 min |
| August | 89°F | 70°F | 79.0°F | 5.51 | 12 | 22 | <1 | 13 h 20 min |
| September | 84°F | 64°F | 74.1°F | 6.04 | 10 | 11 | <1 | 12 h 30 min |
| October | 76°F | 54°F | 64.9°F | 4.09 | 8 | 1 | 1 | 11 h 30 min |
| November | 68°F | 44°F | 55.7°F | 2.75 | 8 | <1 | 8 | 10 h 30 min |
| December | 61°F | 38°F | 49.7°F | 3.78 | 10 | <1 | 12 | 10 h |
| Year (annual) | 76°F | 53°F | 64.3°F | 53.60 | 116 | 90 | 52 |
The same normals in °C and millimetres
| Month | High | Low | Mean | Precip. |
|---|---|---|---|---|
| January | 15°C | 2°C | 8.7°C | 100 mm |
| February | 18°C | 4°C | 10.7°C | 94 mm |
| March | 21°C | 7°C | 13.8°C | 94 mm |
| April | 25°C | 11°C | 17.7°C | 90 mm |
| May | 29°C | 15°C | 21.8°C | 88 mm |
| June | 31°C | 19°C | 25.1°C | 169 mm |
| July | 32°C | 21°C | 26.7°C | 162 mm |
| August | 31°C | 21°C | 26.1°C | 140 mm |
| September | 29°C | 18°C | 23.4°C | 153 mm |
| October | 25°C | 12°C | 18.3°C | 104 mm |
| November | 20°C | 7°C | 13.2°C | 70 mm |
| December | 16°C | 3°C | 9.8°C | 96 mm |
NOAA publishes no 1991-2020 snowfall normal for this station. The nearest record that keeps one, Walterboro (16 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 USC00389469; 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 Yemassee?
Normal highs sit between 65°F and 85°F in March, April, May, September, October and November. Of those, April has the fewest days with rain (8).
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 USC00389469.
When is the last frost in Yemassee?
In Yemassee, the last spring frost (32°F) comes after March 23 in half of years and after April 11 in one year in ten; the first autumn frost comes before November 6 in half of years and before October 25 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 231 year in 10 after April 11; 9 in 10 after February 28
- First autumn frost, half of years before
- November 61 year in 10 before October 25; 9 in 10 before December 1
NOAA puts the median frost-free season at 233 days, and the season without a hard freeze (28°F) at 262 days.
A hard freeze (28°F) comes after March 7 in half of springs and before November 22 in half of autumns.
The USDA's 2023 Plant Hardiness Zone Map puts Yemassee in zone 8b in ZIP code 29945, the nearest ZIP area. By the map's own method, the average of each year's coldest night over 1991-2020, Yemassee's NOAA station is in zone 8a: the coldest night of a typical year reaches 15°F (20 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 USC00389469; 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 Yemassee?
In a normal year in Yemassee, 90 days a year reach 90°F (5 of them 100°F or more), 52 nights fall to 32°F or colder and 116 days bring measurable precipitation.
- Days at 90°F or more
- 90a normal year
- Days at 100°F or more
- 5a normal year
- Nights at 32°F or colder
- 52a normal year
- Days that stay below freezing
- fewer than 1high of 32°F or less
- Days with 0.01 inch of precipitation
- 116a normal year
The highest temperature in this station's record (since 1899) is 110°F, on July 4, 1997; the lowest is 0°F, on January 21, 1985.
The wettest calendar year on that record is 1964, with 74.38 in; the snowiest season is 1972–73, with 12.0 inches.
Source: NOAA NCEI 1991-2020 annual normals, station USC00389469; records: ACIS (NOAA Regional Climate Centers), station USC00389469. Records use complete months only; a month missing more than three days is left out.
How sunny is Yemassee?
Over a year 81% of the sunlight that would reach the ground under clear skies gets through the clouds in the area around Yemassee, 4.8 kWh per square metre a day. July is the sunniest month (84%) and February the cloudiest (75%).
| Month | Share of clear-sky sunshine | Sunshine, kWh/m² a day |
|---|---|---|
| January | 77% | 3.0 |
| February | 75% | 3.6 |
| March | 78% | 4.8 |
| April | 84% | 6.1 |
| May | 84% | 6.5 |
| June | 83% | 6.5 |
| July | 84% | 6.4 |
| August | 82% | 5.7 |
| September | 80% | 4.9 |
| October | 82% | 4.2 |
| November | 81% | 3.3 |
| December | 76% | 2.6 |
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 Yemassee need?
A normal year in Yemassee brings 2,193 heating degree days, 59% fewer than the median U.S. place (5,373), and 1,965 cooling degree days, 2.2 times the median (908). Three months need 300 or more heating degree days, a monthly mean of about 55°F or colder. For gardens and crops, NOAA counts 5,685 growing degree days a year above 50°F.
| Month | Heating | Cooling |
|---|---|---|
| January | 538 | 2 |
| February | 388 | 4 |
| March | 273 | 20 |
| April | 107 | 71 |
| May | 18 | 210 |
| June | 1 | 368 |
| July | 0 | 467 |
| August | 0 | 434 |
| September | 5 | 278 |
| October | 93 | 90 |
| November | 297 | 19 |
| December | 475 | 3 |
| Year (annual) | 2,193 | 1,965 |
Source: NOAA NCEI 1991-2020 monthly normals, station USC00389469. 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 Yemassee been warmer than normal lately?
2024 averaged 67.3°F, 3.0°F above the 1991-2020 normal of 64.3°F. 4 of the 4 complete years since 2021 ran warmer than the normal.
| Year | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 65.7°F | +1.4°F | 55.70 |
| 2022 | 66.5°F | +2.2°F | 45.24 |
| 2023 | 67.0°F | +2.7°F | 59.73 |
| 2024 | 67.3°F | +3.0°F | 63.36 |
Over 86 complete years from 1896 to 2024, the station's annual mean temperature rose at a fitted 0.6°F per century (+0.03°C per decade). A fitted rate summarizes the whole record; single years swing well above and below it.
Source: observed years: ACIS, station USC00389469; trend: NOAA GHCN-Monthly v4. A year counts only with all twelve months complete.
How does Yemassee's climate compare?
Yemassee is warmer than 56 of the other 72 places with their own NOAA record in South Carolina, and wetter than 56. Across the 7,247 U.S. stations with normals, its annual mean of 64.3°F is warmer than 86%.
In the Köppen classification computed from these normals, Yemassee 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 Yemassee 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.
- Sheldon, SC536 people · 8 mi S
- Gillisonville, SC317 people · 11 mi SW
- Coosawhatchie, SC37 people · 9 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 Yemassee's climate
What is the coldest month in Yemassee?
January, with a normal high of 59°F and a normal low of 36°F. The warmest is July (90°F by day, 70°F at night).
Does it snow in Yemassee?
Rarely. NOAA publishes no 1991-2020 snowfall normal for Yemassee's NOAA station; the nearest record that keeps one, Walterboro (16 miles away), records 0 inches of snow in a normal year.
What is the rainiest month in Yemassee?
June, with 6.67 in of precipitation in a normal year; the driest is November with 2.75 in.
What plant hardiness zone is Yemassee in?
The USDA's 2023 map puts Yemassee in zone 8b in ZIP code 29945, the nearest ZIP area. By the same method at Yemassee's NOAA station, the coldest night of a typical year reaches 15°F (20 years, 1991-2020): zone 8a.
How late can frost come in Yemassee?
In half of years the last 32°F night comes after March 23; in one year in ten it comes after April 11. Waiting until April 11 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
- Walterboro, SC16 miles from this station, 64.1°F a year
- Beaufort, SC17 miles from this station, 67.2°F a year
- Hampton, SC19 miles from this station, 66.9°F a year
- Beaufort Wastewater Treatment Plant, SC23 miles from this station, 67.8°F a year
- Compare two placesMonth by month, side by side
Download these normals (CSV) · JSON · How these figures are made