Mosquito season in Greenwood County, SC: when it starts and ends
Mosquito months in Greenwood County
In a normal year mosquito season in Greenwood County, SC starts around March 12 and ends around November 25, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Greenwood County, and when
- Start tipping out standing water weekly by February 26.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 25.
- 3 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to September, more so if over 60.
Greenwood County against the rest of SC
Greenwood County has the 23rd longest season of 46 SC counties, at 258 days against 349 in Charleston County and 209 in Cherokee County. Its mean temperature is 62.3°F.
- Clarendon County: March 9 to November 24 (260 days, 0 WNV)
- Anderson County: March 11 to November 24 (258 days, 5 WNV)
- Marlboro County: March 12 to November 21 (254 days, 1 WNV)
- Abbeville County: March 13 to November 22 (254 days, 0 WNV)
West Nile in Greenwood County
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Greenwood County (2 neuroinvasive) across 4 years. The worst was 2018 with 2; the latest was 2023.
See how the dates are worked out, and when mosquitoes go away for the winter.