Mosquito season in Seward County, NE: when it starts and ends
Mosquito months in Seward County
In a normal year mosquito season in Seward County, NE starts around April 16 and ends around October 19, about 27 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Seward 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 19.
- 11 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to August, and check NE spray notices.
Seward County against the rest of NE
Seward County has the 28th longest season of 93 NE counties, at 186 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 50°F.
- Saline County: April 17 to October 21 (187 days, 3 WNV)
- Kearney County: April 16 to October 19 (186 days, 11 WNV)
- Merrick County: April 17 to October 20 (186 days, 11 WNV)
- Platte County: April 16 to October 18 (185 days, 12 WNV)
West Nile in Seward County
From 1999 to 2025, CDC ArboNET counted 52 human West Nile cases in Seward County (12 neuroinvasive) across 16 years. The worst was 2003 with 24; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.