Mosquito season in Kosciusko County, IN: when it starts and ends
Mosquito months in Kosciusko County
In a normal year mosquito season in Kosciusko County, IN starts around April 17 and ends around October 22, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Kosciusko County, and when
- Start tipping out standing water weekly by April 3.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 22.
- 3 West Nile cases since 2016 (last 2024): you should use repellent at dusk July to August, more so if over 60.
Kosciusko County against the rest of IN
Kosciusko County has the 78th longest season of 92 IN counties, at 188 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 50°F.
- Elkhart County: April 17 to October 22 (189 days, 8 WNV)
- Fulton County: April 17 to October 22 (189 days, 0 WNV)
- LaPorte County: April 17 to October 22 (188 days, 2 WNV)
- Pulaski County: April 17 to October 22 (188 days, 0 WNV)
West Nile in Kosciusko County
From 1999 to 2025, CDC ArboNET counted 14 human West Nile cases in Kosciusko County (8 neuroinvasive) across 7 years. The worst was 2002 with 6; the latest was 2024.
See how the dates are worked out, and when mosquitoes go away for the winter.