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

Mosquito months in Gage County

In a normal year mosquito season in Gage County, NE starts around April 14 and ends around October 23, about 27 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 Gage County, and when

• Start tipping out standing water weekly by March 31.
• Book any yard treatment for mid April, ahead of the July peak.
• Repellent can go away after October 23.
• 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to August, more so if over 60.

Gage County against the rest of NE

Gage County has the 11th longest season of 93 NE counties, at 192 days against 200 in Richardson County and 127 in Sioux County. Its mean temperature is 51.4°F.

• Hall County: April 13 to October 22 (192 days, 37 WNV)
• Howard County: April 13 to October 22 (192 days, 8 WNV)
• Hamilton County: April 14 to October 22 (192 days, 15 WNV)
• Jefferson County: April 14 to October 23 (192 days, 0 WNV)

West Nile in Gage County

From 1999 to 2025, CDC ArboNET counted 52 human West Nile cases in Gage County (18 neuroinvasive) across 12 years. The worst was 2003 with 30; the latest was 2025.

See how the dates are worked out, and reading the West Nile counts.