Mosquito season in Transylvania County, NC: when it starts and ends

Mosquito months in Transylvania County

In a normal year mosquito season in Transylvania County, NC starts around April 2 and ends around November 2, about 31 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Transylvania County, and when

• Start tipping out standing water weekly by March 19.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after November 2.
• No West Nile cases since 2016, so bites in Transylvania County are a nuisance; check window screens.

Transylvania County against the rest of NC

Transylvania County has the 83rd longest season of 100 NC counties, at 214 days against 292 in Carteret County and 176 in Ashe County. Its mean temperature is 54.4°F.

• Henderson County: April 2 to November 3 (215 days, 0 WNV)
• Person County: April 2 to November 3 (215 days, 0 WNV)
• Iredell County: April 3 to November 3 (214 days, 0 WNV)
• Yadkin County: April 3 to November 3 (214 days, 0 WNV)

West Nile in Transylvania County

CDC ArboNET lists no human West Nile cases for Transylvania County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.

Background: when the season starts across the US; how the dates are worked out.