York County

30 Year Climate Normals (Winthrop University)
	Max Temp.	Mean Temp.	Min Temp.	Precip	CDD	HDD
1971-2000	72.1 F	61.6 F	51.1 F	48.32 Inches	1721	2934
1981-2010	73.3 F	62.6 F	51.8 F	43.03 Inches	1930	2815
1991-2020	72.3 F	61 F	49.7 F	42.38 Inches	1706	3141

Temperature Records (1899-2020)

Highest Maximum: 108 F, July 12, 1930; Winthrop University
Lowest Minimum: -4 F, January 21, 1985; Winthrop University

Precipitation Records (1949-2020)

Highest Daily Rainfall (COOP): 8.12 Inches, July 8, 1941; Fort Mill 4 NW
Highest Daily Rainfall (CoCoRaHS): 8.20 inches, August 27, 2008; Lake Wylie 2.3 SW
Annual Average Rainfall: 46.04 Inches; Winthrop University
Wettest Year: 1959, 69.49 Inches; Winthrop University
Driest Year: 2016, 25.56 Inches; Rock Hill York County Airport
Highest Daily Snowfall: 13.50 Inches, February 27, 2004; Catawba

Severe Weather Events- Countywide

Tornado

E/F0: 11

E/F1: 9

E/F2: 3

E/F3: 0

E/F4: 0
Period Of Record: 1950-2020
Strongest: F2 on May 24, 1973 and May 28, 1973; EF2 on November 16, 2011
Longest Path: 9.1 miles on March 24, 1975
Widest Path: 200 yards on November 16, 2011
3 tornado related fatalities
13 tornado related injuries
Total Damage Costs: $3 Million

Thunderstorm, High, and Strong Wind Events

308 Thunderstorm wind events

5 High wind events

8 Strong wind events
3 Wind-related fatalities
7 Wind-related injuries
Total Damage Costs: $1.366 Million

Hail (>1.0 inch)

32 Hail events (1955-2020)

Lightning

20 Lightning events (1993-2020)
2 Lightning related fatalities
1 Lightning related injury
Total Damage Costs: $403,000

Flood

20 Flood Events

0 Coastal Flood Events

21 Flash Flood Events
0 Flood-related fatalities
0 Flood-related injuries
Total Damage Costs: $612,500

Winter Weather-Related Events

10 Winter storm events

7 Ice storm events

11 Heavy snow events

2 Frost/freeze events

29 Winter weather events

5 Cold/wind chill events
0 Winter weather-related fatalities
0 Winter weather-related injuries
Total Damage Costs: $61.715 Million