Dorchester County

30 Year Climate Normals (Summerville)
	Max Temp.	Mean Temp.	Min Temp.	Precip	CDD	HDD
1971-2000	75.7 F	64.1 F	52.4 F	46.9 Inches	2028	2352
1981-2010	76.9 F	64.4 F	52.0 F	52.95 Inches	2096	2291
1991-2020	75.3 F	63.8 F	52.4 F	52.7 Inches	1988	2385

Temperature Records (1930-2020)

Highest Maximum: 107 F, September 21, 1925; Summerville 4W
Lowest Minimum: -5 F, February 14, 1899: Summerville 4W

Precipitation Records (1899-2020)

Highest Daily Rainfall (COOP): 10.23 Inches, August 12, 1940; Summerville 4W
Highest Daily Rainfall (CoCoRaHS): 12.9 inches, October 8, 2016; Reevesville 1.0 SSE
Annual Average Rainfall: 50.27 Inches
Wettest Year: 2015, 76.49 inches; Summerville 4 W
Driest Year: 1954, 27.66 Inches; Summerville 4 W
Highest Daily Snowfall: 15 Inches, February 10, 1973; Summerville 4 W

Severe Weather Events- Countywide

Tornado

E/F0: 8

E/F1: 12

E/F2: 0

E/F3: 0

E/F4: 0
Period Of Record: 1950-2019
Longest Path: 3.12 miles on June 4, 2013
Widest Path: 300 yards on May 12, 1974
0 tornado related fatalities
4 tornado related injuries
Total Damage Costs: $3.1 Million

Thunderstorm, High, and Strong Wind Events

386 Thunderstorm wind events

2 High wind events

31 Strong wind events
0 Wind-related fatalities
3 Wind-related injuries
Total Damage Costs: $520,800

Hail (>1.0 inch)

91 Hail events (1955-2020)

Lightning

15 Lightning events (1993-2020)
0 Lightning related fatalities
3 Lightning related injuries
Total Damage Costs: $120,000

Flood

11 Flood Events

0 Coastal Flood Events

44 Flash Flood Events
0 Flood-related fatalities
0 Flood-related injuries
Total Damage Costs: $6.871 Million

Winter Weather-Related Events

0 Winter storm events

8 Ice storm events

12 Heavy snow events

1 Frost/freeze event

1 Winter weather event

1 Cold/wind chill event
0 Winter weather-related fatalities
0 Winter weather-related injuries
Total Damage Costs: $0