Mosquito season in Jennings County, IN: when it starts and ends
Mosquito months in Jennings County
In a normal year mosquito season in Jennings County, IN starts around April 8 and ends around October 31, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Jennings County, and when
- Start tipping out standing water weekly by March 25.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- 1 West Nile case since 2016 (last 2017): you should use repellent at dusk June to August, more so if over 60.
Jennings County against the rest of IN
Jennings County has the 29th longest season of 92 IN counties, at 206 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 54.8°F.
- Jackson County: April 5 to October 28 (206 days, 0 WNV)
- Monroe County: April 5 to October 29 (206 days, 1 WNV)
- Lawrence County: April 7 to October 29 (205 days, 0 WNV)
- Brown County: April 7 to October 28 (204 days, 0 WNV)
West Nile in Jennings County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Jennings County (1 neuroinvasive) across 2 years. The worst was 2017 with 1; the latest was 2017.
See how the dates are worked out, and when the season starts across the US.