Mosquito season in Dawes County, NE: when it starts and ends
Mosquito months in Dawes County
In a normal year mosquito season in Dawes County, NE starts around May 5 and ends around October 7, about 22 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Dawes County, and when
- Start tipping out standing water weekly by April 21.
- Book any yard treatment for early May, ahead of the July peak.
- Repellent can go away after October 7.
- 5 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to August, more so if over 60.
Dawes County against the rest of NE
Dawes County has the 89th longest season of 93 NE counties, at 155 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 48.1°F.
- Custer County: May 2 to October 9 (160 days, 14 WNV)
- Garden County: May 2 to October 9 (160 days, 4 WNV)
- Kimball County: May 6 to October 6 (153 days, 2 WNV)
- Sheridan County: May 5 to October 4 (152 days, 5 WNV)
West Nile in Dawes County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Dawes County (7 neuroinvasive) across 7 years. The worst was 2025 with 2; the latest was 2025.
Background: reading the West Nile counts; how the dates are worked out.