James Island, SC Weather & Climate Normals
James Island's real weather, in one number
James Island, SC scores 55/100 on this site's reading of NOAA's own 30-year normals: strongly seasonal. Comfortable weather is limited to a shorter window; summers, winters, or precipitation swing wide. 5 of the year's 12 months average between 55 and 75°F, the range this site counts as mild.
James Island's hottest and coldest months
James Island's hottest month is Jul, averaging 82°F; its coldest is Jan, averaging 51°F, a 31.5°F swing across the year, a middling gap by national standards.
Rain and snow in James Island
Over a typical year, James Island sees about 44.26in of precipitation a year across roughly 102 days with measurable rain or snow. That station has no snowfall reading, so none is shown rather than assumed.
Where James Island ranks
James Island ranks 871 of 4876 US cities in this dataset for comfort score, and 4 of 66 within SC. About 12,451 people live there.
If you need tomorrow's forecast, not the 30-year average
Everything above is a 30-year average from CHARLESTON CITY, SC US, 3.0 miles from James Island, not a prediction for any specific day.
More on how this is worked out
Why some cities show no snow or rain figure · What a 30-year climate normal actually is