Mosquito season in Ripley County, IN: when it starts and ends
Mosquito months in Ripley County
In a normal year mosquito season in Ripley County, IN starts around April 17 and ends around October 26, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Ripley 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 26.
- 1 West Nile case since 2016 (last 2024): you should use repellent at dusk June to August, more so if over 60.
Ripley County against the rest of IN
Ripley County has the 61st longest season of 92 IN counties, at 192 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 52.3°F.
- Fayette County: April 14 to October 23 (192 days, 0 WNV)
- Porter County: April 15 to October 24 (192 days, 10 WNV)
- Montgomery County: April 14 to October 23 (191 days, 0 WNV)
- Henry County: April 15 to October 23 (191 days, 0 WNV)
West Nile in Ripley County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Ripley County (3 neuroinvasive) across 3 years. The worst was 2024 with 1; the latest was 2024.
Background: when mosquitoes go away for the winter; how the dates are worked out.