Mosquito season in Bond County, IL: when it starts and ends
Mosquito months in Bond County
In a normal year mosquito season in Bond County, IL starts around March 31 and ends around November 2, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Bond 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 2.
- 1 West Nile case since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Bond County against the rest of IL
Bond County has the 19th longest season of 102 IL counties, at 215 days against 232 in Pulaski County and 174 in Boone County. Its mean temperature is 55.1°F.
- Clay County: March 31 to November 2 (216 days, 0 WNV)
- Washington County: March 31 to November 2 (216 days, 0 WNV)
- Randolph County: April 1 to November 1 (214 days, 1 WNV)
- Lawrence County: April 2 to November 1 (214 days, 0 WNV)
West Nile in Bond County
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Bond County (4 neuroinvasive) across 5 years. The worst was 2012 with 2; the latest was 2018.
More: how the dates are worked out · when mosquitoes go away for the winter.