Mosquito season in Cowley County, KS: when it starts and ends
Mosquito months in Cowley County
In a normal year mosquito season in Cowley County, KS starts around April 3 and ends around November 1, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Cowley County, and when
- Start tipping out standing water weekly by March 20.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after November 1.
- 3 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to September, more so if over 60.
Cowley County against the rest of KS
Cowley County has the 23rd longest season of 105 KS counties, at 212 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 56.5°F.
- Butler County: April 3 to November 2 (213 days, 6 WNV)
- Barber County: April 2 to October 31 (212 days, 3 WNV)
- Harvey County: April 4 to November 2 (212 days, 1 WNV)
- Geary County: April 2 to October 30 (211 days, 0 WNV)
West Nile in Cowley County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Cowley County (2 neuroinvasive) across 4 years. The worst was 2023 with 1; the latest was 2023.
Background: when the season starts across the US; how the dates are worked out.