Mosquito season in Lexington County, SC: when it starts and ends
Mosquito months in Lexington County
In a normal year mosquito season in Lexington County, SC starts around March 17 and ends around November 14, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lexington County, and when
- Start tipping out standing water weekly by March 3.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 14.
- 6 West Nile cases since 2016 (last 2024): you should use repellent at dusk May to September, more so if over 60.
Lexington County against the rest of SC
Lexington County has the 38th longest season of 46 SC counties, at 242 days against 349 in Charleston County and 209 in Cherokee County. Its mean temperature is 64.4°F.
- Fairfield County: March 18 to November 17 (244 days, 0 WNV)
- Laurens County: March 18 to November 17 (244 days, 1 WNV)
- Pickens County: March 20 to November 15 (240 days, 1 WNV)
- Chester County: March 20 to November 13 (238 days, 1 WNV)
West Nile in Lexington County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Lexington County (5 neuroinvasive) across 8 years. The worst was 2017 with 2; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.