Mosquito season in LaGrange County, IN: when it starts and ends
Mosquito months in LaGrange County
In a normal year mosquito season in LaGrange 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 LaGrange 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.
- No West Nile cases since 2016, so bites in LaGrange County are a nuisance; check window screens.
LaGrange County against the rest of IN
LaGrange County has the 88th longest season of 92 IN counties, at 184 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 49.3°F.
- Noble County: April 19 to October 21 (185 days, 0 WNV)
- Whitley County: April 19 to October 20 (185 days, 2 WNV)
- Huntington County: April 20 to October 21 (184 days, 1 WNV)
- St. Joseph County: April 21 to October 20 (182 days, 2 WNV)
West Nile in LaGrange County
From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in LaGrange County (0 neuroinvasive) across 2 years. The worst was 2002 with 5; the latest was 2006.
Background: when mosquitoes go away for the winter; how the dates are worked out.