Mosquito season in Randolph County, IN: when it starts and ends
Mosquito months in Randolph County
In a normal year mosquito season in Randolph County, IN starts around April 14 and ends around October 24, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Randolph County, and when
- Start tipping out standing water weekly by March 31.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 24.
- 1 West Nile case since 2016 (last 2023): you should use repellent at dusk June to August, more so if over 60.
Randolph County against the rest of IN
Randolph County has the 55th longest season of 92 IN counties, at 193 days against 231 in Floyd County and 177 in Steuben County. Its mean temperature is 50.9°F.
- Warren County: April 13 to October 23 (193 days, 0 WNV)
- Miami County: April 14 to October 25 (193 days, 0 WNV)
- Tipton County: April 14 to October 24 (193 days, 1 WNV)
- Wabash County: April 14 to October 24 (193 days, 0 WNV)
West Nile in Randolph County
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Randolph County (1 neuroinvasive) across 3 years. The worst was 2023 with 1; the latest was 2023.
More: how the dates are worked out · when the season starts across the US.