Mosquito season in Orangeburg County, SC: when it starts and ends

Mosquito months in Orangeburg County

In a normal year mosquito season in Orangeburg County, SC starts around February 28 and ends around December 6, about 40 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Orangeburg County, and when

• Start tipping out standing water weekly by February 14.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after December 6.
• No West Nile cases since 2016, so bites in Orangeburg County are a nuisance; check window screens.

Orangeburg County against the rest of SC

Orangeburg County has the 10th longest season of 46 SC counties, at 281 days against 349 in Charleston County and 209 in Cherokee County. Its mean temperature is 65.2°F.

• Calhoun County: February 23 to December 2 (282 days, 0 WNV)
• Horry County: February 28 to December 7 (282 days, 11 WNV)
• Edgefield County: February 28 to December 1 (276 days, 0 WNV)
• Colleton County: March 1 to November 28 (272 days, 0 WNV)

West Nile in Orangeburg County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Orangeburg County (2 neuroinvasive) across 3 years. The worst was 2012 with 1; the latest was 2012.

See how the dates are worked out, and when mosquitoes go away for the winter.