Mosquito season in Polk County, NC: when it starts and ends
Mosquito months in Polk County
In a normal year mosquito season in Polk County, NC starts around March 25 and ends around November 10, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Polk County, and when
- Start tipping out standing water weekly by March 11.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 10.
- No West Nile cases since 2016, so bites in Polk County are a nuisance; check window screens.
Polk County against the rest of NC
Polk County has the 63rd longest season of 100 NC counties, at 230 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 58.9°F.
- McDowell County: March 24 to November 10 (231 days, 0 WNV)
- Randolph County: March 24 to November 10 (231 days, 0 WNV)
- Caldwell County: March 25 to November 9 (229 days, 0 WNV)
- Hertford County: March 26 to November 10 (229 days, 1 WNV)
West Nile in Polk County
CDC ArboNET lists no human West Nile cases for Polk County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
More: how the dates are worked out · when the season starts across the US.