Mosquito season in Fulton County, OH: when it starts and ends
Mosquito months in Fulton County
In a normal year mosquito season in Fulton County, OH starts around April 21 and ends around October 19, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Fulton County, and when
- Start tipping out standing water weekly by April 7.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 19.
- 3 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to August, more so if over 60.
Fulton County against the rest of OH
Fulton County has the 82nd longest season of 88 OH counties, at 181 days against 209 in Gallia County and 177 in Ashtabula County. Its mean temperature is 49.1°F.
- Holmes County: April 21 to October 21 (183 days, 3 WNV)
- Williams County: April 21 to October 20 (182 days, 1 WNV)
- Medina County: April 21 to October 19 (181 days, 4 WNV)
- Trumbull County: April 22 to October 19 (180 days, 6 WNV)
West Nile in Fulton County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Fulton County (9 neuroinvasive) across 6 years. The worst was 2006 with 4; the latest was 2025.
Background: when the season starts across the US; how the dates are worked out.