Mosquito season in Nemaha County, KS: when it starts and ends
Mosquito months in Nemaha County
In a normal year mosquito season in Nemaha County, KS starts around April 9 and ends around October 26, about 29 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Nemaha 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 26.
- No West Nile cases since 2016, so bites in Nemaha County are a nuisance; check window screens.
Nemaha County against the rest of KS
Nemaha County has the 66th longest season of 105 KS counties, at 200 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 52.7°F.
- Reno County: April 10 to October 28 (201 days, 11 WNV)
- Riley County: April 10 to October 28 (201 days, 1 WNV)
- Clark County: April 10 to October 27 (200 days, 0 WNV)
- Ford County: April 11 to October 28 (200 days, 9 WNV)
West Nile in Nemaha County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Nemaha County (1 neuroinvasive) across 1 year. The worst was 2015 with 1; the latest was 2015.
Background: when mosquitoes go away for the winter; how the dates are worked out.