Mosquito season in Hayes County, NE: when it starts and ends
Mosquito months in Hayes County
In a normal year mosquito season in Hayes County, NE starts around April 22 and ends around October 17, about 25 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Hayes County, and when
- Start tipping out standing water weekly by April 8.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 17.
- 1 West Nile case since 2016 (last 2021): you should use repellent at dusk July to August, more so if over 60.
Hayes County against the rest of NE
Hayes County has the 53rd longest season of 93 NE counties, at 178 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 50.2°F.
- Thurston County: April 21 to October 16 (178 days, 2 WNV)
- Wayne County: April 21 to October 16 (178 days, 3 WNV)
- Keith County: April 22 to October 17 (178 days, 9 WNV)
- Webster County: April 22 to October 16 (177 days, 2 WNV)
West Nile in Hayes County
From 1999 to 2025, CDC ArboNET counted 5 human West Nile cases in Hayes County (0 neuroinvasive) across 3 years. The worst was 2003 with 3; the latest was 2021.
Background: when the season starts across the US; how the dates are worked out.