Mosquito season in Jasper County, IN: when it starts and ends
Mosquito months in Jasper County
In a normal year mosquito season in Jasper County, IN starts around April 16 and ends around October 22, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Jasper 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 22.
- 2 West Nile cases since 2016 (last 2020): you should use repellent at dusk June to August, more so if over 60.
Jasper County against the rest of IN
Jasper County has the 73rd longest season of 92 IN counties, at 189 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 50.3°F.
- Allen County: April 16 to October 23 (190 days, 11 WNV)
- Grant County: April 16 to October 23 (190 days, 2 WNV)
- Jay County: April 16 to October 22 (189 days, 2 WNV)
- Wells County: April 16 to October 22 (189 days, 2 WNV)
West Nile in Jasper County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Jasper County (5 neuroinvasive) across 5 years. The worst was 2020 with 1; the latest was 2020.
More: how the dates are worked out · when mosquitoes go away for the winter.