Humid subtropical climate
Climate Sullivans Island - South Carolina
Annual high75ºF
Annual low56ºF
Precipitation49.73 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 59 | 37 | 4.11 |
| Feb | 61 | 39 | 3.14 |
| Mar | 67 | 45 | 3.78 |
| Apr | 74 | 54 | 3.65 |
| May | 82 | 64 | 2.43 |
| Jun | 88 | 71 | 4.50 |
| Jul | 91 | 74 | 4.92 |
| Aug | 90 | 73 | 6.35 |
| Sep | 85 | 68 | 5.62 |
| Oct | 78 | 58 | 4.51 |
| Nov | 70 | 49 | 2.98 |
| Dec | 62 | 40 | 3.74 |
- JanHigh 59ºFLow 37ºFPrecip 4.11 inch
- FebHigh 61ºFLow 39ºFPrecip 3.14 inch
- MarHigh 67ºFLow 45ºFPrecip 3.78 inch
- AprHigh 74ºFLow 54ºFPrecip 3.65 inch
- MayHigh 82ºFLow 64ºFPrecip 2.43 inch
- JunHigh 88ºFLow 71ºFPrecip 4.50 inch
- JulHigh 91ºFLow 74ºFPrecip 4.92 inch
- AugHigh 90ºFLow 73ºFPrecip 6.35 inch
- SepHigh 85ºFLow 68ºFPrecip 5.62 inch
- OctHigh 78ºFLow 58ºFPrecip 4.51 inch
- NovHigh 70ºFLow 49ºFPrecip 2.98 inch
- DecHigh 62ºFLow 40ºFPrecip 3.74 inch
Climate summary
What is the average weather in Sullivans Island, South Carolina?
Sullivans Island experiences a humid subtropical climate, characterized by hot summers and cool winters. The area is fairly wet overall, with a moderate seasonal pattern that brings wetter conditions in summer. Heavy seasonal downpours or afternoon thunderstorms can sometimes occur during the warmer months, contributing to the abundant precipitation.
Sullivans Island weather averages
Annual high75ºF
Annual low56ºF
Precipitation49.73 inch
Daily normals Sullivans Island - South Carolina - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 59.9 | 37.1 | 0.10 | 0.10 |
| Jan 2 | 59.8 | 36.9 | 0.20 | 0.20 |
| Jan 3 | 59.7 | 36.8 | 0.31 | 0.31 |
| Jan 4 | 59.6 | 36.7 | 0.41 | 0.41 |
| Jan 5 | 59.5 | 36.7 | 0.53 | 0.53 |
| Jan 6 | 59.5 | 36.6 | 0.65 | 0.65 |
| Jan 7 | 59.4 | 36.5 | 0.77 | 0.77 |
| Jan 8 | 59.3 | 36.4 | 0.89 | 0.89 |
| Jan 9 | 59.3 | 36.4 | 1.01 | 1.01 |
| Jan 10 | 59.2 | 36.3 | 1.13 | 1.13 |
| Jan 11 | 59.1 | 36.3 | 1.26 | 1.26 |
| Jan 12 | 59.1 | 36.3 | 1.39 | 1.39 |
| Jan 13 | 59.0 | 36.2 | 1.52 | 1.52 |
| Jan 14 | 59.0 | 36.2 | 1.65 | 1.65 |
| Jan 15 | 59.0 | 36.2 | 1.78 | 1.78 |
| Jan 16 | 59.0 | 36.2 | 1.92 | 1.92 |
| Jan 17 | 58.9 | 36.2 | 2.06 | 2.06 |
| Jan 18 | 58.9 | 36.2 | 2.19 | 2.19 |
| Jan 19 | 58.9 | 36.2 | 2.33 | 2.33 |
| Jan 20 | 58.9 | 36.3 | 2.46 | 2.46 |
| Jan 21 | 58.9 | 36.3 | 2.59 | 2.59 |
| Jan 22 | 58.9 | 36.3 | 2.72 | 2.72 |
| Jan 23 | 59.0 | 36.4 | 2.85 | 2.85 |
| Jan 24 | 59.0 | 36.5 | 2.99 | 2.99 |
| Jan 25 | 59.0 | 36.5 | 3.12 | 3.12 |
| Jan 26 | 59.1 | 36.6 | 3.25 | 3.25 |
| Jan 27 | 59.1 | 36.7 | 3.37 | 3.37 |
| Jan 28 | 59.2 | 36.7 | 3.49 | 3.49 |
| Jan 29 | 59.2 | 36.8 | 3.60 | 3.60 |
| Jan 30 | 59.3 | 36.9 | 3.71 | 3.71 |
| Jan 31 | 59.4 | 37.0 | 3.81 | 3.81 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Sullivans Island - September 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Sep 1 | 88.0 | 77.0 | 0.00 |
| Sep 2 | 88.0 | 78.1 | 0.00 |
| Sep 3 | 88.0 | 78.1 | 0.00 |
| Sep 4 | 89.1 | 79.0 | 0.00 |
| Sep 5 | 90.0 | 75.9 | 0.00 |
| Sep 6 | 91.9 | 75.0 | 0.05 |
| Sep 7 | 87.1 | 73.9 | 0.00 |
| Sep 8 | 84.0 | 73.9 | 0.07 |
| Sep 9 | 88.0 | 75.0 | 0.00 |
| Sep 10 | 87.1 | 75.9 | 0.00 |
| Sep 11 | 81.0 | 75.9 | 0.14 |
| Sep 12 | 90.0 | 79.0 | 0.00 |
| Sep 13 | 86.0 | 71.1 | 0.00 |
| Sep 14 | 86.0 | 69.1 | 0.00 |
| Sep 15 | 86.0 | 69.1 | 0.00 |
| Sep 16 | 86.0 | 72.0 | 0.00 |
| Sep 17 | 91.0 | 75.9 | 0.00 |
| Sep 18 | 84.9 | 78.1 | 0.00 |
| Sep 19 | 96.1 | 71.1 | 0.00 |
| Sep 20 | 88.0 | 73.9 | 0.00 |
| Sep 21 | 87.1 | 77.0 | 0.00 |
| Sep 22 | 79.0 | 73.0 | 0.00 |
| Sep 23 | 78.1 | 69.1 | 0.00 |
| Sep 24 | 72.0 | 61.0 | 0.00 |
| Sep 25 | 73.0 | 61.0 | 0.08 |
| Sep 26 | 78.1 | 64.9 | 0.00 |
| Sep 27 | 82.9 | 64.0 | 0.00 |
| Sep 28 | 82.9 | 66.9 | 0.00 |
| Sep 29 | 82.9 | 71.1 | 0.00 |
| Sep 30 | 82.0 | 72.0 | 0.00 |
The data for September 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature96.1ºF · Sep 19
- Lowest max temperature72.0ºF · Sep 24
- Highest min temperature79.0ºF · Sep 4
- Lowest min temperature61.0ºF · Sep 24
Geo Sullivans Island - South Carolina
Location
- Country
- United States
- State
- South Carolina
- County
- Charleston
- City
- Sullivans Island
- Zip Code
- 29482
- Elevation
- 10 ft
- Longitude
- -79.84
- Latitude
- 32.76
- ICAO
- –
- IATA
- –