Mosquito season in Whitley County, IN: when it starts and ends
Mosquito months in Whitley County
In a normal year mosquito season in Whitley County, IN starts around April 19 and ends around October 20, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Whitley County, and when
- Start tipping out standing water weekly by April 5.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 20.
- 2 West Nile cases since 2016 (last 2018): you should use repellent at dusk July to August, more so if over 60.
Whitley County against the rest of IN
Whitley County has the 87th longest season of 92 IN counties, at 185 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 49.5°F.
- Marshall County: April 18 to October 22 (186 days, 1 WNV)
- Noble County: April 19 to October 21 (185 days, 0 WNV)
- LaGrange County: April 19 to October 20 (184 days, 0 WNV)
- Huntington County: April 20 to October 21 (184 days, 1 WNV)
West Nile in Whitley County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Whitley County (3 neuroinvasive) across 4 years. The worst was 2002 with 5; the latest was 2018.
See how the dates are worked out, and when the season starts across the US.