Mosquito season in Harnett County, NC: when it starts and ends
Mosquito months in Harnett County
In a normal year mosquito season in Harnett County, NC starts around March 14 and ends around November 17, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Harnett County, and when
- Start tipping out standing water weekly by February 28.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 17.
- No West Nile cases since 2016, so bites in Harnett County are a nuisance; check window screens.
Harnett County against the rest of NC
Harnett County has the 32nd longest season of 100 NC counties, at 248 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 60.7°F.
- Washington County: March 17 to November 21 (249 days, 0 WNV)
- Columbus County: March 14 to November 17 (248 days, 3 WNV)
- Pamlico County: March 17 to November 20 (248 days, 0 WNV)
- Onslow County: March 18 to November 21 (248 days, 1 WNV)
West Nile in Harnett County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Harnett County (0 neuroinvasive) across 1 year. The worst was 2003 with 1; the latest was 2003.
See how the dates are worked out, and when the season starts across the US.