Mosquito season in Van Wert County, OH: when it starts and ends

Mosquito months in Van Wert County

In a normal year mosquito season in Van Wert County, OH starts around April 16 and ends around October 24, about 27 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 Van Wert County, and when

• Start tipping out standing water weekly by April 2.
• Book any yard treatment for mid April, ahead of the July peak.
• Repellent can go away after October 24.
• 1 West Nile case since 2016 (last 2017): you should use repellent at dusk June to August, more so if over 60.

Van Wert County against the rest of OH

Van Wert County has the 47th longest season of 88 OH counties, at 192 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 51°F.

• Belmont County: April 16 to October 25 (192 days, 1 WNV)
• Lucas County: April 16 to October 25 (192 days, 11 WNV)
• Erie County: April 18 to October 27 (192 days, 1 WNV)
• Madison County: April 14 to October 22 (191 days, 0 WNV)

West Nile in Van Wert County

From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Van Wert County (1 neuroinvasive) across 3 years. The worst was 2012 with 3; the latest was 2017.

See how the dates are worked out, and when the season starts across the US.