Mosquito season in Greenwood County, KS: when it starts and ends
Mosquito months in Greenwood County
In a normal year mosquito season in Greenwood County, KS starts around April 5 and ends around October 30, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Greenwood County, and when
- Start tipping out standing water weekly by March 22.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 30.
- No West Nile cases since 2016, so bites in Greenwood County are a nuisance; check window screens.
Greenwood County against the rest of KS
Greenwood County has the 35th longest season of 105 KS counties, at 208 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 55.3°F.
- McPherson County: April 6 to November 1 (209 days, 5 WNV)
- Douglas County: April 5 to October 30 (208 days, 7 WNV)
- Rice County: April 6 to October 31 (208 days, 2 WNV)
- Atchison County: April 4 to October 29 (207 days, 2 WNV)
West Nile in Greenwood County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Greenwood County (0 neuroinvasive) across 1 year. The worst was 2007 with 1; the latest was 2007.
See how the dates are worked out, and when mosquitoes go away for the winter.