Mosquito season in Blackford County, IN: when it starts and ends
Mosquito months in Blackford County
In a normal year mosquito season in Blackford County, IN starts around April 12 and ends around October 26, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Blackford 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 26.
- No West Nile cases since 2016, so bites in Blackford County are a nuisance; check window screens.
Blackford County against the rest of IN
Blackford County has the 47th longest season of 92 IN counties, at 196 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 51.4°F.
- Hamilton County: April 11 to October 25 (197 days, 10 WNV)
- Rush County: April 11 to October 25 (197 days, 0 WNV)
- Fountain County: April 12 to October 25 (196 days, 0 WNV)
- Johnson County: April 12 to October 24 (196 days, 2 WNV)
West Nile in Blackford County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Blackford County (2 neuroinvasive) across 4 years. The worst was 2012 with 2; the latest was 2012.
More: how the dates are worked out · when the season starts across the US.