Mosquito season in Lorain County, OH: when it starts and ends
Mosquito months in Lorain County
In a normal year mosquito season in Lorain County, OH starts around April 16 and ends around October 26, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lorain 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 26.
- 3 West Nile cases since 2016 (last 2024): you should use repellent at dusk July to August, more so if over 60.
Lorain County against the rest of OH
Lorain County has the 39th longest season of 88 OH counties, at 193 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 51.2°F.
- Mercer County: April 15 to October 25 (193 days, 2 WNV)
- Putnam County: April 15 to October 24 (193 days, 1 WNV)
- Champaign County: April 14 to October 23 (192 days, 0 WNV)
- Harrison County: April 14 to October 23 (192 days, 0 WNV)
West Nile in Lorain County
From 1999 to 2025, CDC ArboNET counted 33 human West Nile cases in Lorain County (26 neuroinvasive) across 12 years. The worst was 2002 with 14; the latest was 2024.
More: how the dates are worked out · when mosquitoes go away for the winter.