Mosquito season in Menard County, IL: when it starts and ends
Mosquito months in Menard County
In a normal year mosquito season in Menard County, IL starts around April 9 and ends around October 26, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Menard County, and when
- Start tipping out standing water weekly by March 26.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 26.
- No West Nile cases since 2016, so bites in Menard County are a nuisance; check window screens.
Menard County against the rest of IL
Menard County has the 60th longest season of 102 IL counties, at 201 days against 232 in Pulaski County and 174 in Boone County. Its mean temperature is 52.3°F.
- Mason County: April 8 to October 26 (201 days, 0 WNV)
- Tazewell County: April 8 to October 26 (201 days, 7 WNV)
- Logan County: April 8 to October 25 (200 days, 0 WNV)
- Champaign County: April 9 to October 26 (200 days, 5 WNV)
West Nile in Menard County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Menard County (1 neuroinvasive) across 2 years. The worst was 2015 with 1; the latest was 2015.
More: how the dates are worked out · when mosquitoes go away for the winter.