Mosquito season in Harrisonburg city, VA: when it starts and ends

Mosquito months in Harrisonburg city

In a normal year mosquito season in Harrisonburg city, VA starts around April 9 and ends around October 29, about 29 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 Harrisonburg city, 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 29.
• 2 West Nile cases since 2016 (last 2024): you should use repellent at dusk June to August, more so if over 60.

Harrisonburg city against the rest of VA

Harrisonburg city has the 103rd longest season of 133 VA counties, at 203 days against 257 in Norfolk city and 172 in Highland County. Its mean temperature is 53.6°F.

• Buchanan County: April 9 to October 29 (203 days, 0 WNV)
• Rockingham County: April 9 to October 29 (203 days, 8 WNV)
• Smyth County: April 9 to October 28 (202 days, 0 WNV)
• Lee County: April 10 to October 29 (202 days, 0 WNV)

West Nile in Harrisonburg city

From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Harrisonburg city (1 neuroinvasive) across 2 years. The worst was 2024 with 1; the latest was 2024.

See how the dates are worked out, and when mosquitoes go away for the winter.