Mosquito season in Vigo County, IN: when it starts and ends
Mosquito months in Vigo County
In a normal year mosquito season in Vigo County, IN starts around April 1 and ends around October 30, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Vigo County, and when
- Start tipping out standing water weekly by March 18.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 30.
- No West Nile cases since 2016, so bites in Vigo County are a nuisance; check window screens.
Vigo County against the rest of IN
Vigo County has the 16th longest season of 92 IN counties, at 212 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 54.9°F.
- Martin County: April 2 to November 2 (214 days, 0 WNV)
- Gibson County: April 2 to November 1 (213 days, 0 WNV)
- Switzerland County: April 4 to November 2 (212 days, 0 WNV)
- Crawford County: April 3 to October 31 (211 days, 1 WNV)
West Nile in Vigo County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Vigo County (1 neuroinvasive) across 1 year. The worst was 2013 with 1; the latest was 2013.
More: how the dates are worked out · when mosquitoes go away for the winter.