Mosquito season in Roanoke County, VA: when it starts and ends
Mosquito months in Roanoke County
In a normal year mosquito season in Roanoke County, VA starts around April 11 and ends around October 26, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Roanoke County, and when
- Start tipping out standing water weekly by March 28.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 26.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk July to August, more so if over 60.
Roanoke County against the rest of VA
Roanoke County has the 118th longest season of 133 VA counties, at 198 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 52.4°F.
- Grayson County: April 11 to October 26 (198 days, 0 WNV)
- Montgomery County: April 11 to October 26 (198 days, 0 WNV)
- Page County: April 13 to October 28 (198 days, 0 WNV)
- Shenandoah County: April 13 to October 27 (197 days, 4 WNV)
West Nile in Roanoke County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Roanoke County (3 neuroinvasive) across 4 years. The worst was 2018 with 1; the latest was 2018.
Background: when mosquitoes go away for the winter; how the dates are worked out.