Mosquito season in Orange County, IN: when it starts and ends
Mosquito months in Orange County
In a normal year mosquito season in Orange County, IN starts around April 8 and ends around October 29, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Orange 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 29.
- 1 West Nile case since 2016 (last 2016): you should use repellent at dusk June to August, more so if over 60.
Orange County against the rest of IN
Orange County has the 33rd longest season of 92 IN counties, at 204 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 54.2°F.
- Brown County: April 7 to October 28 (204 days, 0 WNV)
- Franklin County: April 7 to October 28 (204 days, 0 WNV)
- Owen County: April 7 to October 27 (203 days, 0 WNV)
- Shelby County: April 8 to October 28 (203 days, 1 WNV)
West Nile in Orange County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Orange County (1 neuroinvasive) across 1 year. The worst was 2016 with 1; the latest was 2016.
More: how the dates are worked out · when the season starts across the US.