Mosquito season in Pike County, IL: when it starts and ends
Mosquito months in Pike County
In a normal year mosquito season in Pike County, IL starts around April 4 and ends around October 30, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Pike County, and when
- Start tipping out standing water weekly by March 21.
- 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 Pike County are a nuisance; check window screens.
Pike County against the rest of IL
Pike County has the 37th longest season of 102 IL counties, at 208 days against 232 in Pulaski County and 174 in Boone County. Its mean temperature is 53.8°F.
- Crawford County: April 4 to October 30 (209 days, 0 WNV)
- White County: April 3 to October 28 (208 days, 0 WNV)
- Clark County: April 5 to October 30 (208 days, 0 WNV)
- Macoupin County: April 4 to October 29 (207 days, 3 WNV)
West Nile in Pike County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Pike County (0 neuroinvasive) across 1 year. The worst was 2007 with 1; the latest was 2007.
Background: when mosquitoes go away for the winter; how the dates are worked out.