Mosquito season in Morgan County, IN: when it starts and ends
Mosquito months in Morgan County
In a normal year mosquito season in Morgan County, IN starts around April 12 and ends around October 25, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Morgan County, and when
- Start tipping out standing water weekly by March 29.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 25.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to August, more so if over 60.
Morgan County against the rest of IN
Morgan County has the 50th longest season of 92 IN counties, at 196 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 52.1°F.
- Fountain County: April 12 to October 25 (196 days, 0 WNV)
- Johnson County: April 12 to October 24 (196 days, 2 WNV)
- Wayne County: April 12 to October 24 (195 days, 1 WNV)
- Tippecanoe County: April 13 to October 24 (194 days, 3 WNV)
West Nile in Morgan County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Morgan County (3 neuroinvasive) across 4 years. The worst was 2002 with 2; the latest was 2023.
See how the dates are worked out, and when the season starts across the US.