Mosquito season in Otoe County, NE: when it starts and ends
Mosquito months in Otoe County
In a normal year mosquito season in Otoe County, NE starts around April 16 and ends around October 22, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Otoe County, and when
- Start tipping out standing water weekly by April 2.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 22.
- 3 West Nile cases since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Otoe County against the rest of NE
Otoe County has the 21st longest season of 93 NE counties, at 189 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 51.2°F.
- Saunders County: April 15 to October 20 (189 days, 14 WNV)
- Washington County: April 15 to October 21 (189 days, 17 WNV)
- Nemaha County: April 15 to October 20 (188 days, 3 WNV)
- Hitchcock County: April 16 to October 21 (188 days, 3 WNV)
West Nile in Otoe County
From 1999 to 2025, CDC ArboNET counted 17 human West Nile cases in Otoe County (7 neuroinvasive) across 5 years. The worst was 2003 with 11; the latest was 2018.
See how the dates are worked out, and when mosquitoes go away for the winter.