Mosquito season in Washington County, NC: when it starts and ends
Mosquito months in Washington County
In a normal year mosquito season in Washington County, NC starts around March 17 and ends around November 21, about 36 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Washington 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 21.
- No West Nile cases since 2016, so bites in Washington County are a nuisance; check window screens.
Washington County against the rest of NC
Washington County has the 30th longest season of 100 NC counties, at 249 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 62.1°F.
- Sampson County: March 14 to November 18 (249 days, 0 WNV)
- Pender County: March 16 to November 20 (249 days, 0 WNV)
- Columbus County: March 14 to November 17 (248 days, 3 WNV)
- Harnett County: March 14 to November 17 (248 days, 0 WNV)
West Nile in Washington County
CDC ArboNET lists no human West Nile cases for Washington County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
See how the dates are worked out, and when the season starts across the US.