Mosquito season in Dawson County, NE: when it starts and ends
Mosquito months in Dawson County
In a normal year mosquito season in Dawson County, NE starts around April 18 and ends around October 18, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Dawson County, and when
- Start tipping out standing water weekly by April 4.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 18.
- 14 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to August, and check NE spray notices.
Dawson County against the rest of NE
Dawson County has the 33rd longest season of 93 NE counties, at 184 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 50.5°F.
- Colfax County: April 17 to October 18 (185 days, 7 WNV)
- Burt County: April 18 to October 19 (184 days, 1 WNV)
- Butler County: April 18 to October 18 (183 days, 11 WNV)
- Gosper County: April 18 to October 19 (183 days, 0 WNV)
West Nile in Dawson County
From 1999 to 2025, CDC ArboNET counted 147 human West Nile cases in Dawson County (24 neuroinvasive) across 19 years. The worst was 2003 with 80; the latest was 2024.
More: how the dates are worked out · reading the West Nile counts.