Mosquito season in Franklin County, NE: when it starts and ends
Mosquito months in Franklin County
In a normal year mosquito season in Franklin County, NE starts around April 19 and ends around October 19, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Franklin 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 19.
- 2 West Nile cases since 2016 (last 2018): you should use repellent at dusk June to August, more so if over 60.
Franklin County against the rest of NE
Franklin County has the 37th longest season of 93 NE counties, at 183 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 51.6°F.
- Gosper County: April 18 to October 19 (183 days, 0 WNV)
- Dundy County: April 19 to October 19 (183 days, 1 WNV)
- Nuckolls County: April 19 to October 19 (183 days, 3 WNV)
- Stanton County: April 19 to October 18 (183 days, 2 WNV)
West Nile in Franklin County
From 1999 to 2025, CDC ArboNET counted 16 human West Nile cases in Franklin County (2 neuroinvasive) across 5 years. The worst was 2003 with 10; the latest was 2018.
More: how the dates are worked out · when mosquitoes go away for the winter.