Charleston County
| 30 Year Climate Normals (Charleston City) |
|---|
| |
Max Temp. |
Mean Temp. |
Min Temp. |
Precip |
CDD |
HDD |
| 1971-2000 |
73.5 F |
67.0 F |
60.4 F |
46.39 Inches |
2486 |
1755 |
| 1981-2010 |
72.9 F |
66.7 F |
60.6 F |
44.42 Inches |
2375 |
1736 |
| 1991-2020 |
73.3 F |
67.2 F |
61.1 F |
44.26 Inches |
2448 |
1623 |
Temperature Records (1893-2020)
Highest Maximum: 105 F, June 26 1952, Sullivans Island August 1, 1999; Charleston
Lowest Minimum: 4 F, January 21, 1985; McClellanville
Precipitation Records (1893-2020)
Highest Daily Rainfall (COOP): 11.50 inches, October 3, 2015; Charleston AFB
Highest Daily Rainfall (CoCoRaHS): 13.17 inches, October 4, 2015; Mount Pleasant 6.4 NE
Annual Average Rainfall: 45.30 inches
Wettest Year: 1994, 80.78 inches; Sullivan’s Island
Driest Year: 2000, 27.63 inches; Downtown Charleston
Highest Daily Snowfall: 6.5 inches, February 10, 1973; Charleston NAS
Severe Weather Events- Countywide
Tornado
48 Tornadoes (1950-2020)
-
- E/F0: 24
- E/F1: 20
- E/F2: 3
- E/F3: 1
- E/F4: 0
- Period Of Record: 1950-2020
- Strongest: F3 on September 11, 1960
- Longest Path: 8.8 miles on September 11, 1960
- Widest Path: 1760 yards on May 11, 2008
- 0 tornado related fatalities
- 17 tornado related injuries
- Total Damage Costs: $6 Million
Thunderstorm, High, and Strong Wind Events
521 Total Wind Events (winds exceeding 50 knots or 58 miles per hour, 1955-2020)
-
- 463 Thunderstorm wind events
- 12 High wind events
- 46 Strong wind events
- 3 Wind-related fatalities
- 3 Wind-related injuries
- Total Damage Costs: $738,850
Hail (>1.0 inch)
159 Hail events (1955-2020)
Lightning
36 Lightning events (1993-2020)
2 Lightning related fatalities
11 Lightning related injuries
Total Damage Costs: $1.155 Million
Flood
392 Total Flood Events (1993-2020)
-
- 8 Flood Events
- 166 Coastal Flood Events
- 218 Flash Flood Events
- 0 Flood-related fatalities
- 3 Flood-related injuries
- Total Damage Costs: $20.403 Million
Winter Weather-Related Events
30 Total Winter Weather-Related Events
-
- 1 Winter storm event
- 7 Ice storm events
- 19 Heavy snow events
- 1 Frost/freeze event
- 1 Winter weather event
- 1 Cold/wind chill event
- 1 Winter weather-related fatality
- 0 Winter weather-related injuries
- Total Damage Costs: $233,000
