Mosquito season in Rooks County, KS: when it starts and ends
Mosquito months in Rooks County
In a normal year mosquito season in Rooks County, KS starts around April 19 and ends around October 21, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Rooks County, and when
- Start tipping out standing water weekly by April 5.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 21.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to August, more so if over 60.
Rooks County against the rest of KS
Rooks County has the 94th longest season of 105 KS counties, at 185 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 53.7°F.
- Jewell County: April 20 to October 23 (186 days, 0 WNV)
- Scott County: April 20 to October 23 (186 days, 4 WNV)
- Logan County: April 20 to October 22 (185 days, 1 WNV)
- Decatur County: April 19 to October 20 (184 days, 1 WNV)
West Nile in Rooks County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Rooks County (3 neuroinvasive) across 4 years. The worst was 2025 with 1; the latest was 2025.
Background: when mosquitoes go away for the winter; how the dates are worked out.