Mosquito season in Pulaski County, IL: when it starts and ends
Mosquito months in Pulaski County
In a normal year mosquito season in Pulaski County, IL starts around March 23 and ends around November 10, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Pulaski County, and when
- Start tipping out standing water weekly by March 9.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 10.
- No West Nile cases since 2016, so bites in Pulaski County are a nuisance; check window screens.
Pulaski County against the rest of IL
Pulaski County has the 1st longest season of 102 IL counties, at 232 days against 232 in Pulaski County and 174 in Boone County. Its mean temperature is 58°F.
- Saline County: March 26 to November 6 (225 days, 0 WNV)
- Gallatin County: March 26 to November 5 (224 days, 0 WNV)
West Nile in Pulaski County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Pulaski County (1 neuroinvasive) across 1 year. The worst was 2013 with 1; the latest was 2013.
Background: when mosquitoes go away for the winter; how the dates are worked out.