Mosquito season in Rockingham County, VA: when it starts and ends

Mosquito months in Rockingham County

In a normal year mosquito season in Rockingham County, 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 Rockingham 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 29.
• 8 West Nile cases since 2016 (last 2024): you should use repellent at dusk June to August, more so if over 60.

Rockingham County against the rest of VA

Rockingham County has the 102nd 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.

• Fluvanna County: April 9 to October 31 (205 days, 0 WNV)
• Buchanan County: April 9 to October 29 (203 days, 0 WNV)
• Harrisonburg city: April 9 to October 29 (203 days, 2 WNV)
• Smyth County: April 9 to October 28 (202 days, 0 WNV)

West Nile in Rockingham County

From 1999 to 2025, CDC ArboNET counted 12 human West Nile cases in Rockingham County (10 neuroinvasive) across 7 years. The worst was 2018 with 4; the latest was 2024.

Background: reading the West Nile counts; how the dates are worked out.