Mosquito season in Wayne County, OH: when it starts and ends
Mosquito months in Wayne County
In a normal year mosquito season in Wayne County, OH starts around April 18 and ends around October 20, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Wayne County, and when
- Start tipping out standing water weekly by April 4.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 20.
- 4 West Nile cases since 2016 (last 2018): you should use repellent at dusk July to July, more so if over 60.
Wayne County against the rest of OH
Wayne County has the 73rd longest season of 88 OH counties, at 185 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 49.8°F.
- Ashland County: April 18 to October 21 (185 days, 0 WNV)
- Morrow County: April 18 to October 20 (185 days, 0 WNV)
- Carroll County: April 20 to October 22 (185 days, 0 WNV)
- Columbiana County: April 20 to October 22 (185 days, 3 WNV)
West Nile in Wayne County
From 1999 to 2025, CDC ArboNET counted 16 human West Nile cases in Wayne County (10 neuroinvasive) across 7 years. The worst was 2003 with 4; the latest was 2018.
Background: reading the West Nile counts; how the dates are worked out.