Mosquito season in Greeley County, KS: when it starts and ends
Mosquito months in Greeley County
In a normal year mosquito season in Greeley County, KS starts around April 23 and ends around October 19, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Greeley County, and when
- Start tipping out standing water weekly by April 9.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 19.
- 2 West Nile cases since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Greeley County against the rest of KS
Greeley County has the 102nd longest season of 105 KS counties, at 179 days against 227 in Cherokee County and 178 in Thomas County. Its mean temperature is 52.2°F.
- Rush County: April 21 to October 19 (181 days, 0 WNV)
- Wichita County: April 23 to October 21 (181 days, 0 WNV)
- Sherman County: April 23 to October 19 (179 days, 5 WNV)
- Rawlins County: April 22 to October 17 (178 days, 2 WNV)
West Nile in Greeley County
From 1999 to 2025, CDC ArboNET counted 2 human West Nile cases in Greeley County (1 neuroinvasive) across 1 year. The worst was 2018 with 2; the latest was 2018.
See how the dates are worked out, and when the season starts across the US.