Mosquito season in Haskell County, KS: when it starts and ends

Mosquito months in Haskell County

In a normal year mosquito season in Haskell County, KS starts around April 12 and ends around October 29, about 29 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Haskell County, and when

• Start tipping out standing water weekly by March 29.
• Book any yard treatment for mid April, ahead of the July peak.
• Repellent can go away after October 29.
• 3 West Nile cases since 2016 (last 2024): you should use repellent at dusk June to September, more so if over 60.

Haskell County against the rest of KS

Haskell County has the 69th longest season of 105 KS counties, at 200 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 56.4°F.

• Clark County: April 10 to October 27 (200 days, 0 WNV)
• Ford County: April 11 to October 28 (200 days, 9 WNV)
• Sheridan County: April 10 to October 25 (199 days, 0 WNV)
• Russell County: April 12 to October 27 (198 days, 0 WNV)

West Nile in Haskell County

From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in Haskell County (2 neuroinvasive) across 5 years. The worst was 2024 with 2; the latest was 2024.

Background: when mosquitoes go away for the winter; how the dates are worked out.