Mosquito season in Scioto County, OH: when it starts and ends
Mosquito months in Scioto County
In a normal year mosquito season in Scioto County, OH starts around April 7 and ends around October 31, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Scioto County, and when
- Start tipping out standing water weekly by March 24.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- No West Nile cases since 2016, so bites in Scioto County are a nuisance; check window screens.
Scioto County against the rest of OH
Scioto County has the 6th longest season of 88 OH counties, at 207 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 54.3°F.
- Hamilton County: April 5 to October 30 (208 days, 13 WNV)
- Washington County: April 6 to October 29 (207 days, 0 WNV)
- Montgomery County: April 6 to October 29 (206 days, 14 WNV)
- Ross County: April 6 to October 29 (206 days, 3 WNV)
West Nile in Scioto County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Scioto County (1 neuroinvasive) across 1 year. The worst was 2004 with 1; the latest was 2004.
See how the dates are worked out, and when mosquitoes go away for the winter.