Mosquito season in Greene County, IN: when it starts and ends
Mosquito months in Greene County
In a normal year mosquito season in Greene County, IN starts around March 31 and ends around November 3, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Greene County, and when
- Start tipping out standing water weekly by March 17.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 3.
- 1 West Nile case since 2016 (last 2017): you should use repellent at dusk June to August, more so if over 60.
Greene County against the rest of IN
Greene County has the 11th longest season of 92 IN counties, at 217 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 55.4°F.
- Jefferson County: March 31 to November 4 (218 days, 2 WNV)
- Perry County: March 31 to November 4 (218 days, 1 WNV)
- Knox County: April 1 to November 3 (216 days, 0 WNV)
- Sullivan County: April 1 to November 1 (214 days, 2 WNV)
West Nile in Greene County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Greene County (0 neuroinvasive) across 1 year. The worst was 2017 with 1; the latest was 2017.
See how the dates are worked out, and when the season starts across the US.