Mosquito season in Carroll County, OH: when it starts and ends
Mosquito months in Carroll County
In a normal year mosquito season in Carroll County, OH starts around April 20 and ends around October 22, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Carroll County, and when
- Start tipping out standing water weekly by April 6.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 22.
- No West Nile cases since 2016, so bites in Carroll County are a nuisance; check window screens.
Carroll County against the rest of OH
Carroll County has the 74th longest season of 88 OH counties, at 185 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 50.4°F.
- Morrow County: April 18 to October 20 (185 days, 0 WNV)
- Wayne County: April 18 to October 20 (185 days, 4 WNV)
- Columbiana County: April 20 to October 22 (185 days, 3 WNV)
- Adams County: April 20 to October 21 (184 days, 0 WNV)
West Nile in Carroll County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Carroll County (1 neuroinvasive) across 1 year. The worst was 2014 with 1; the latest was 2014.
More: how the dates are worked out · when mosquitoes go away for the winter.