Charleston and James Island have remarkably similar climates.
The year at a glance
Averages from 30 years of climate history, 1991-2020
| Charleston | Metric | James Island |
|---|---|---|
| 214 days | Sunny daysclear or partly cloudy skies | 214 days |
| 47 in | Precipitationper year | 47 in |
| 130 days | Wet daysrain or snow per year | 130 days |
| 0 in | Snowfallper year | 0 in |
| 41 days | Hot daysabove 90 °F | 33 days |
| 12 days | Freezing nightsat or below 32 °F | 10 days |
| 77% | Humidityaverage relative | 77% |
| 67 °F | Average temperatureyear round | 67 °F |
Monthly temperatures
Average daily high and low for each month, in °F. The gap between the two lines is what an ordinary day feels like across the year.
Daily highs
Daily lows
View monthly temperatures as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Charleston high | 59 | 62 | 67 | 74 | 81 | 86 | 89 | 88 | 84 | 77 | 68 | 62 |
| James Island high | 58 | 61 | 66 | 73 | 80 | 85 | 89 | 87 | 83 | 76 | 68 | 61 |
| Charleston low | 41 | 44 | 49 | 57 | 66 | 72 | 75 | 75 | 71 | 61 | 50 | 44 |
| James Island low | 42 | 44 | 50 | 58 | 67 | 73 | 76 | 75 | 71 | 62 | 51 | 45 |
Monthly precipitation
Total rain plus melted snow for each month, in inches. Taller bars mean wetter months.
View monthly precipitation as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Charleston | 3.2 | 3.3 | 3.2 | 2.9 | 2.7 | 5.1 | 5.4 | 6.3 | 5.0 | 4.0 | 2.6 | 3.4 |
| James Island | 3.2 | 3.3 | 3.2 | 2.9 | 2.7 | 5.1 | 5.4 | 6.3 | 5.0 | 4.0 | 2.6 | 3.4 |
Monthly sunny days
Days each month with clear or partly cloudy skies, so compare the same month between cities.
View monthly sunny days as a table
| City | Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Charleston | 17 | 15 | 18 | 20 | 20 | 17 | 17 | 16 | 18 | 21 | 20 | 17 |
| James Island | 17 | 15 | 18 | 20 | 20 | 17 | 17 | 16 | 18 | 21 | 20 | 17 |
Keep comparing
Nearby cities and popular picks for each side of this matchup. Any two cities can be compared from the home page.
Charleston vs another city
- Charleston vs Mount Pleasant, SC
- Charleston vs Hanahan, SC
- Charleston vs North Charleston, SC
- Charleston vs Goose Creek, SC
- Charleston vs Hollywood, SC
- Charleston vs New York, NY
- Charleston vs Los Angeles, CA
- Charleston vs Chicago, IL
- Charleston vs Houston, TX
- Charleston vs Phoenix, AZ
- Charleston vs Philadelphia, PA
James Island vs another city
- James Island vs Mount Pleasant, SC
- James Island vs Hanahan, SC
- James Island vs North Charleston, SC
- James Island vs Hollywood, SC
- James Island vs Goose Creek, SC
- James Island vs New York, NY
- James Island vs Los Angeles, CA
- James Island vs Chicago, IL
- James Island vs Houston, TX
- James Island vs Phoenix, AZ
- James Island vs Philadelphia, PA
About this data
Every figure on this page is a 30 year average computed from daily climate history for 1991-2020, using each city's own coordinates. Wet days count days with measurable precipitation, calibrated against the wet day counts in NOAA's published climate normals. Sunny days count clear plus partly cloudy days, defined as average cloud cover of 63 percent or less and calibrated against NOAA's published sky cover tables. Snowfall figures are model estimates anchored to NOAA station measurements near each city.
Weather data by Open-Meteo.com (CC BY 4.0). Contains modified Copernicus Climate Change Service information (ERA5, ERA5-Land).