Mosquito season in Montgomery County, IN: when it starts and ends
Mosquito months in Montgomery County
In a normal year mosquito season in Montgomery County, IN starts around April 14 and ends around October 23, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Montgomery County, and when
- Start tipping out standing water weekly by March 31.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 23.
- No West Nile cases since 2016, so bites in Montgomery County are a nuisance; check window screens.
Montgomery County against the rest of IN
Montgomery County has the 62nd longest season of 92 IN counties, at 191 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 50.6°F.
- Porter County: April 15 to October 24 (192 days, 10 WNV)
- Ripley County: April 17 to October 26 (192 days, 1 WNV)
- Henry County: April 15 to October 23 (191 days, 0 WNV)
- Howard County: April 15 to October 23 (191 days, 5 WNV)
West Nile in Montgomery County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Montgomery County (2 neuroinvasive) across 2 years. The worst was 2012 with 1; the latest was 2012.
See how the dates are worked out, and when mosquitoes go away for the winter.