Mosquito season in McCormick County, SC: when it starts and ends
Mosquito months in McCormick County
In a normal year mosquito season in McCormick County, SC starts around March 16 and ends around November 20, about 36 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in McCormick County, and when
- Start tipping out standing water weekly by March 2.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 20.
- No West Nile cases since 2016, so bites in McCormick County are a nuisance; check window screens.
McCormick County against the rest of SC
McCormick County has the 30th longest season of 46 SC counties, at 249 days against 349 in Charleston County and 209 in Cherokee County. Its mean temperature is 62.5°F.
- Dillon County: March 14 to November 20 (251 days, 1 WNV)
- Lancaster County: March 15 to November 20 (250 days, 1 WNV)
- Newberry County: March 18 to November 20 (247 days, 1 WNV)
- Lee County: March 16 to November 16 (245 days, 0 WNV)
West Nile in McCormick County
CDC ArboNET lists no human West Nile cases for McCormick County from 1999 to 2025.
See how the dates are worked out, and when mosquitoes go away for the winter.