Mosquito season in Steuben County, IN: when it starts and ends
Mosquito months in Steuben County
In a normal year mosquito season in Steuben County, IN starts around April 23 and ends around October 17, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Steuben County, and when
- Start tipping out standing water weekly by April 9.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 17.
- No West Nile cases since 2016, so bites in Steuben County are a nuisance; check window screens.
Steuben County against the rest of IN
Steuben County has the 92nd longest season of 92 IN counties, at 177 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 48.3°F.
- St. Joseph County: April 21 to October 20 (182 days, 2 WNV)
- DeKalb County: April 22 to October 19 (180 days, 0 WNV)
West Nile in Steuben County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Steuben County (0 neuroinvasive) across 2 years. The worst was 2006 with 1; the latest was 2006.
More: how the dates are worked out · when the season starts across the US.