Mosquito season in Caswell County, NC: when it starts and ends
Mosquito months in Caswell County
In a normal year mosquito season in Caswell County, NC starts around March 20 and ends around November 12, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Caswell County, and when
- Start tipping out standing water weekly by March 6.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 12.
- No West Nile cases since 2016, so bites in Caswell County are a nuisance; check window screens.
Caswell County against the rest of NC
Caswell County has the 53rd longest season of 100 NC counties, at 237 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 58.7°F.
- Cabarrus County: March 20 to November 13 (238 days, 3 WNV)
- Alexander County: March 20 to November 12 (237 days, 0 WNV)
- Guilford County: March 22 to November 14 (237 days, 6 WNV)
- Jones County: March 24 to November 16 (237 days, 0 WNV)
West Nile in Caswell County
CDC ArboNET lists no human West Nile cases for Caswell 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 mosquitoes go away for the winter.