Mosquito season in Wyandotte County, KS: when it starts and ends
Mosquito months in Wyandotte County
In a normal year mosquito season in Wyandotte County, KS starts around April 5 and ends around October 31, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Wyandotte County, and when
- Start tipping out standing water weekly by March 22.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- 5 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to August, more so if over 60.
Wyandotte County against the rest of KS
Wyandotte County has the 31st longest season of 105 KS counties, at 209 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 54.8°F.
- Kingman County: April 5 to October 31 (209 days, 4 WNV)
- Shawnee County: April 5 to October 31 (209 days, 12 WNV)
- Anderson County: April 6 to November 1 (209 days, 0 WNV)
- McPherson County: April 6 to November 1 (209 days, 5 WNV)
West Nile in Wyandotte County
From 1999 to 2025, CDC ArboNET counted 18 human West Nile cases in Wyandotte County (17 neuroinvasive) across 12 years. The worst was 2015 with 3; the latest was 2023.
More: how the dates are worked out · reading the West Nile counts.