Mosquito season in Lucas County, OH: when it starts and ends
Mosquito months in Lucas County
In a normal year mosquito season in Lucas County, OH starts around April 16 and ends around October 25, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lucas 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 25.
- 11 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to August, and check OH spray notices.
Lucas County against the rest of OH
Lucas County has the 46th longest season of 88 OH counties, at 192 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 51.2°F.
- Fairfield County: April 15 to October 24 (192 days, 0 WNV)
- Belmont County: April 16 to October 25 (192 days, 1 WNV)
- Van Wert County: April 16 to October 24 (192 days, 1 WNV)
- Erie County: April 18 to October 27 (192 days, 1 WNV)
West Nile in Lucas County
From 1999 to 2025, CDC ArboNET counted 61 human West Nile cases in Lucas County (46 neuroinvasive) across 17 years. The worst was 2002 with 14; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.