Edgefield County

30 Year Climate Normals (Johnston)
Max Temp. Mean Temp. Min Temp. Precip CDD HDD
1971-2000 73.9 F 60.5 F 47.1 F 48.65 Inches 1567 3180
1981-2010 73.0 F 61.3 F 49.6 F 46.91 Inches 1714 3051
1991-2020 74.9 F 62.7 F 50.4 F 48.47 Inches 1943 2761

Temperature Records (1893-2020)


Highest Maximum: 111 F, July 1, 2012; Johnston 4 SW
Lowest Minimum: -4 F, February 14, 1899; Trenton 1 NNE

Precipitation Records (1899-2020)


Highest Daily Rainfall (COOP): 7.90 Inches, October 12, 1990; McCormick 9E
Highest Daily Rainfall (CoCoRaHS): 7.75 inches, June 3, 2013; Trenton 6.3 SSW
Annual Average Rainfall: 48.32 Inches
Wettest Year: 1929, 84.23; Edgefield 3 NNE
Driest Year: 1954, 26.04 Inches; Edgefield 3 NNE
Highest Daily Snowfall: 14 Inches, February 10, 1973; Johnston 4 SW

Severe Weather Events- Countywide

Tornado

20 Tornadoes (1950-2020)
  • E/F0: 5
  • E/F1: 7
  • E/F2: 5
  • E/F3: 3
  • E/F4: 0
    • Period Of Record: 1950-2019
    Strongest: F3 on November 22, 1992 and May 6, 1998 (2)
    Longest Path: 20.9 miles on March 15, 2008
    Widest Path: 1000 yards on April 15, 2017
    1 tornado related fatality
    24 tornado related injuries
    Total Damage Costs: $3.8 Million

    Thunderstorm, High, and Strong Wind Events

    157 Total Wind Events (winds exceeding 50 knots or 58 miles per hour, 1955-2020)
  • 154 Thunderstorm wind events
  • 1 High wind event
  • 2 Strong wind events
    • 0 Wind-related fatalities
    0 Wind-related injuries
    Total Damage Costs: $760,010

    Hail (>1.0 inch)


    37 Hail events (1955-2020)

    Lightning


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

    Flood

    8 Total Flood Events (1993-2020)
  • 2 Flood Events
  • 0 Coastal Flood Events
  • 6 Flash Flood Events
    • 0 Flood-related fatalities
    0 Flood-related injuries
    Total Damage Costs: $56,140

    Winter Weather-Related Events

    12 Total Winter Weather-Related Events
  • 7 Winter storm events
  • 3 Ice storm events
  • 0 Heavy snow events
  • 0 Frost/freeze events
  • 2 Winter weather events
  • 0 Cold/wind chill events
    • 0 Winter weather-related fatalities
    0 Winter weather-related injuries
    Total Damage Costs: $0