Chester County
| 30 Year Climate Normals (Chester 1NW*, 1SE) |
|---|
| |
Max Temp. |
Mean Temp. |
Min Temp. |
Precip |
CDD |
HDD |
| 1971-2000* |
72.2 F |
60.1 F |
48.0 F |
47.87 Inches |
1558 |
3326 |
| 1981-2010 |
72.5 F |
60.4 F |
48.3 F |
45.75 Inches |
1670 |
3342 |
| 1991-2020 |
72.1 F |
60.4 F |
48.8 F |
45.92 Inches |
1668 |
3302 |
Temperature Records (1923-2020)
Highest Maximum: 106 F, August 21, 1983; Chester 1 SE
Lowest Minimum: -5 F, December 13, 1962; Chester 1 SE
Precipitation Records (1922-2020)
Highest Daily Rainfall (COOP): 8.4 Inches, August 23, 1967; Chester 1 SE
Highest Daily Rainfall (CoCoRaHS): 5.42 Inches, August 27, 2008; Lowrys 3.6 ENE
Annual Average Rainfall: 46.25 Inches
Wettest Year: 1964, 64.63 Inches; Chester 1 SE
Driest Year: 1999, 19.81 inches; Great Falls
Highest Daily Snowfall: 8.3 inches, January 11, 2011; Lowrys 3.6 ENE (CoCoRaHS)
Severe Weather Events- Countywide
Tornado
15 Tornadoes (1950-2020)
-
- E/F0: 4
- E/F1: 9
- E/F2: 2
- E/F3: 0
- E/F4: 0
- Period Of Record: 1950-2020
- Strongest: F2 on April 16, 1994 and EF2 on May 5, 2020
- Longest Path: 1.39 miles on November 16, 2011
- Widest Path: 100 yards on November 16, 2011
- 1 tornado related fatality
- 4 tornado related injuries
- Total Damage Costs: $7.6 Million
Thunderstorm, High, and Strong Wind Events
143 Total Wind Events (winds exceeding 50 knots or 58 miles per hour, 1955-2020)
-
- 139 Thunderstorm wind events
- 4 High wind events
- 0 Strong wind events
- 0 Wind-related fatalities
- 0 Wind-related injuries
- Total Damage Costs: $261,000
Hail (>1.0 inch)
47 Hail events (1955-2020)
Lightning
1 Lightning event (1993-2020)
1 Lightning related fatality
0 Lightning related injuries
Total Damage Costs: $0
Flood
13 Total Flood Events (1993-2020)
-
- 6 Flood Events
- 0 Coastal Flood Events
- 7 Flash Flood Events
- 0 Flood-related fatalities
- 1 Flood-related injury
- Total Damage Costs: $l45,000
Winter Weather-Related Events
46 Total Winter Weather-Related Events
-
- 4 Winter storm events
- 5 Ice storm events
- 10 Heavy snow events
- 2 Frost/freeze events
- 21 Winter weather events
- 4 Cold/wind chill events
- 0 Winter weather-related fatalities
- 0 Winter weather-related injuries
- Total Damage Costs: $57.130 Million
