McCormick County

30 Year Climate Normals (Clarks Hill)
	Max Temp.	Mean Temp.	Min Temp.	Precip	CDD	HDD
1971-2000	77.0 F	63.0 F	49.0 F	46.79 Inches	2023	2730
1981-2010	75.9 F	64.4 F	52.9 F	45.05 Inches	2238	2451
1991-2020	74.7 F	64.1 F	53.4 F	46.91 Inches	2151	2467

Temperature Records (1952-2020)

Highest Maximum: 109 F, July 29, 1987; Clarks Hill 1 W
Lowest Minimum: -2 F, January 21, 1985; Clarks Hill 1 W

Precipitation Records (1952-2020)

Highest Daily Rainfall (COOP): 9.40 Inches, October 12, 1990; Clarks Hill 1 W
Highest Daily Rainfall (CoCoRaHS): 5.15 inches, August 21, 2019; McCormick 2.3 W
Annual Average Rainfall: 46.16 Inches; Clarks Hill 1 W
Wettest Year: 1964, 76.28 inches; Clarks Hill 1 W
Driest Year: 1954, 24.28 Inches; Clarks Hill 1 W
Highest Daily Snowfall: 8.0 Inches, February 24, 1989; Clarks Hill 1 W

Severe Weather Events- Countywide

Tornado

E/F0: 7

E/F1: 8

E/F2: 0

E/F3: 1

E/F4: 0
Period Of Record: 1950-2020
Strongest: F3 on November 22, 1992
Longest Path: 16 miles on February 13, 2007
Widest Path: 440 yards on March 15, 2008
0 tornado related fatalities
4 tornado related injuries
Total Damage Costs: $510,000

Thunderstorm, High, and Strong Wind Events

102 Thunderstorm wind events

1 High wind event

4 Strong wind events
0 Wind-related fatalities
2 Wind-related injuries
Total Damage Costs: $347,000

Hail (>1.0 inch)

29 Hail events (1955-2020)

Lightning

1 Lightning event (1993-2020)
0 Lightning related fatalities
0 Lightning related injuries
Total Damage Costs: $200,000

Flood

0 Flood Events

0 Coastal Flood Events

4 Flash Flood Events
0 Flood-related fatalities
0 Flood-related injuries
Total Damage Costs: $18,000

Winter Weather-Related Events

8 Winter storm events

4 Ice storm events

0 Heavy snow events

0 Frost/freeze events

0 Winter weather events

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