Mosquito season in Shawnee County, KS: when it starts and ends
Mosquito months in Shawnee County
In a normal year mosquito season in Shawnee 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 Shawnee 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.
- 12 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to August, and check KS spray notices.
Shawnee County against the rest of KS
Shawnee County has the 30th longest season of 105 KS counties, at 209 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 55.4°F.
- Labette County: April 4 to November 1 (211 days, 0 WNV)
- Kingman County: April 5 to October 31 (209 days, 4 WNV)
- Wyandotte County: April 5 to October 31 (209 days, 5 WNV)
- Anderson County: April 6 to November 1 (209 days, 0 WNV)
West Nile in Shawnee County
From 1999 to 2025, CDC ArboNET counted 21 human West Nile cases in Shawnee County (13 neuroinvasive) across 10 years. The worst was 2017 with 4; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.