Mosquito season in Colleton County, SC: when it starts and ends
Mosquito months in Colleton County
In a normal year mosquito season in Colleton County, SC starts around March 1 and ends around November 28, about 39 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Colleton County, and when
- Start tipping out standing water weekly by February 15.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 28.
- No West Nile cases since 2016, so bites in Colleton County are a nuisance; check window screens.
Colleton County against the rest of SC
Colleton County has the 12th longest season of 46 SC counties, at 272 days against 349 in Charleston County and 209 in Cherokee County. Its mean temperature is 64.1°F.
- Orangeburg County: February 28 to December 6 (281 days, 0 WNV)
- Edgefield County: February 28 to December 1 (276 days, 0 WNV)
- Aiken County: March 4 to November 30 (271 days, 5 WNV)
- Barnwell County: March 5 to November 30 (270 days, 2 WNV)
West Nile in Colleton County
CDC ArboNET lists no human West Nile cases for Colleton County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 6 of those years.
Background: when mosquitoes go away for the winter; how the dates are worked out.