Mosquito season in Reno County, KS: when it starts and ends
Mosquito months in Reno County
In a normal year mosquito season in Reno County, KS starts around April 10 and ends around October 28, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Reno County, and when
- Start tipping out standing water weekly by March 27.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 28.
- 11 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to August, and check KS spray notices.
Reno County against the rest of KS
Reno County has the 64th longest season of 105 KS counties, at 201 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 55.2°F.
- Brown County: April 8 to October 26 (201 days, 1 WNV)
- Leavenworth County: April 9 to October 27 (201 days, 2 WNV)
- Riley County: April 10 to October 28 (201 days, 1 WNV)
- Nemaha County: April 9 to October 26 (200 days, 0 WNV)
West Nile in Reno County
From 1999 to 2025, CDC ArboNET counted 42 human West Nile cases in Reno County (24 neuroinvasive) across 16 years. The worst was 2013 with 8; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.