Mosquito season in McPherson County, NE: when it starts and ends
Mosquito months in McPherson County
In a normal year mosquito season in McPherson County, NE starts around April 28 and ends around October 12, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in McPherson County, and when
- Start tipping out standing water weekly by April 14.
- Book any yard treatment for late April, ahead of the July peak.
- Repellent can go away after October 12.
- No West Nile cases since 2016, so bites in McPherson County are a nuisance; check window screens.
McPherson County against the rest of NE
McPherson County has the 78th longest season of 93 NE counties, at 167 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 48.5°F.
- Grant County: April 27 to October 12 (167 days, 0 WNV)
- Hooker County: April 28 to October 12 (167 days, 2 WNV)
- Scotts Bluff County: April 28 to October 12 (167 days, 50 WNV)
- Chase County: April 29 to October 13 (167 days, 7 WNV)
West Nile in McPherson County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in McPherson County (1 neuroinvasive) across 1 year. The worst was 2003 with 1; the latest was 2003.
Background: when mosquitoes go away for the winter; how the dates are worked out.