Mosquito season in Antelope County, NE: when it starts and ends

Mosquito months in Antelope County

In a normal year mosquito season in Antelope County, NE starts around April 23 and ends around October 13, about 25 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Antelope County, and when

• Start tipping out standing water weekly by April 9.
• Book any yard treatment for late April, ahead of the July peak.
• Repellent can go away after October 13.
• 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to August, more so if over 60.

Antelope County against the rest of NE

Antelope County has the 62nd longest season of 93 NE counties, at 173 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 48.2°F.

• Cherry County: April 24 to October 15 (174 days, 0 WNV)
• Perkins County: April 24 to October 15 (174 days, 11 WNV)
• Lincoln County: April 25 to October 15 (173 days, 30 WNV)
• Loup County: April 25 to October 13 (171 days, 0 WNV)

West Nile in Antelope County

From 1999 to 2025, CDC ArboNET counted 16 human West Nile cases in Antelope County (1 neuroinvasive) across 8 years. The worst was 2007 with 4; the latest was 2025.

Background: reading the West Nile counts; how the dates are worked out.