Mosquito season in Smyth County, VA: when it starts and ends
Mosquito months in Smyth County
In a normal year mosquito season in Smyth County, VA starts around April 9 and ends around October 28, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Smyth County, and when
- Start tipping out standing water weekly by March 26.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 28.
- No West Nile cases since 2016, so bites in Smyth County are a nuisance; check window screens.
Smyth County against the rest of VA
Smyth County has the 104th longest season of 133 VA counties, at 202 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 53.3°F.
- Rockingham County: April 9 to October 29 (203 days, 8 WNV)
- Harrisonburg city: April 9 to October 29 (203 days, 2 WNV)
- Lee County: April 10 to October 29 (202 days, 0 WNV)
- Pulaski County: April 9 to October 27 (201 days, 0 WNV)
West Nile in Smyth County
CDC ArboNET lists no human West Nile cases for Smyth County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.