Mosquito season in Buffalo County, NE: when it starts and ends
Mosquito months in Buffalo County
In a normal year mosquito season in Buffalo County, NE starts around April 19 and ends around October 18, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Buffalo County, and when
- Start tipping out standing water weekly by April 5.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 18.
- 22 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to August, and check NE spray notices.
Buffalo County against the rest of NE
Buffalo County has the 40th longest season of 93 NE counties, at 182 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 49.9°F.
- Nuckolls County: April 19 to October 19 (183 days, 3 WNV)
- Stanton County: April 19 to October 18 (183 days, 2 WNV)
- Cuming County: April 19 to October 17 (182 days, 17 WNV)
- Frontier County: April 21 to October 19 (181 days, 1 WNV)
West Nile in Buffalo County
From 1999 to 2025, CDC ArboNET counted 282 human West Nile cases in Buffalo County (46 neuroinvasive) across 20 years. The worst was 2003 with 167; the latest was 2024.
Background: reading the West Nile counts; how the dates are worked out.