Mosquito season in Rice County, KS: when it starts and ends
Mosquito months in Rice County
In a normal year mosquito season in Rice County, KS starts around April 6 and ends around October 31, about 30 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Rice County, and when
- Start tipping out standing water weekly by March 23.
- Book any yard treatment for early April, ahead of the July peak.
- Repellent can go away after October 31.
- 2 West Nile cases since 2016 (last 2021): you should use repellent at dusk June to August, more so if over 60.
Rice County against the rest of KS
Rice County has the 36th longest season of 105 KS counties, at 208 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 55.5°F.
- Douglas County: April 5 to October 30 (208 days, 7 WNV)
- Greenwood County: April 5 to October 30 (208 days, 0 WNV)
- Atchison County: April 4 to October 29 (207 days, 2 WNV)
- Lyon County: April 5 to October 29 (207 days, 0 WNV)
West Nile in Rice County
From 1999 to 2025, CDC ArboNET counted 8 human West Nile cases in Rice County (5 neuroinvasive) across 5 years. The worst was 2002 with 3; the latest was 2021.
Background: when the season starts across the US; how the dates are worked out.