Mosquito season in Chatham County, NC: when it starts and ends
Mosquito months in Chatham County
In a normal year mosquito season in Chatham County, NC starts around March 17 and ends around November 15, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Chatham 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 15.
- No West Nile cases since 2016, so bites in Chatham County are a nuisance; check window screens.
Chatham County against the rest of NC
Chatham County has the 41st longest season of 100 NC counties, at 243 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 59.8°F.
- Edgecombe County: March 18 to November 17 (244 days, 0 WNV)
- Forsyth County: March 15 to November 13 (243 days, 2 WNV)
- Granville County: March 17 to November 15 (243 days, 0 WNV)
- Moore County: March 17 to November 15 (243 days, 1 WNV)
West Nile in Chatham County
CDC ArboNET lists no human West Nile cases for Chatham County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 4 of those years.
More: how the dates are worked out · when the season starts across the US.