Mosquito season in Forsyth County, NC: when it starts and ends
Mosquito months in Forsyth County
In a normal year mosquito season in Forsyth County, NC starts around March 15 and ends around November 13, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Forsyth County, and when
- Start tipping out standing water weekly by March 1.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 13.
- 2 West Nile cases since 2016 (last 2021): you should use repellent at dusk June to September, more so if over 60.
Forsyth County against the rest of NC
Forsyth County has the 40th longest season of 100 NC counties, at 243 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 59.1°F.
- Stanly County: March 16 to November 16 (245 days, 0 WNV)
- Edgecombe County: March 18 to November 17 (244 days, 0 WNV)
- Chatham County: March 17 to November 15 (243 days, 0 WNV)
- Granville County: March 17 to November 15 (243 days, 0 WNV)
West Nile in Forsyth County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Forsyth County (3 neuroinvasive) across 3 years. The worst was 2021 with 1; the latest was 2021.
Background: when mosquitoes go away for the winter; how the dates are worked out.