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

Mosquito months in Stevens County

In a normal year mosquito season in Stevens County, KS starts around April 9 and ends around October 30, 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 Stevens County, and when

• Start tipping out standing water weekly by March 26.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after October 30.
• 4 West Nile cases since 2016 (last 2023): you should use repellent at dusk June to August, more so if over 60.

Stevens County against the rest of KS

Stevens County has the 48th longest season of 105 KS counties, at 204 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 55.5°F.

• Stanton County: April 9 to October 31 (205 days, 2 WNV)
• Pratt County: April 9 to October 30 (204 days, 6 WNV)
• Chase County: April 7 to October 27 (203 days, 0 WNV)
• Cloud County: April 7 to October 27 (203 days, 0 WNV)

West Nile in Stevens County

From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Stevens County (4 neuroinvasive) across 3 years. The worst was 2023 with 3; the latest was 2023.

See how the dates are worked out, and reading the West Nile counts.