Mosquito season in Eureka County, NV: when it starts and ends
Mosquito months in Eureka County
In a normal year mosquito season in Eureka County, NV starts around May 12 and ends around October 1, about 20 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Eureka County, and when
- Start tipping out standing water weekly by April 28.
- Book any yard treatment for mid May, ahead of the July peak.
- Repellent can go away after October 1.
- No West Nile cases since 2016, so bites in Eureka County are a nuisance; check window screens.
Eureka County against the rest of NV
Eureka County has the 12th longest season of 17 NV counties, at 142 days against 323 in Clark County and 107 in White Pine County. Its mean temperature is 46.7°F.
- Douglas County: May 11 to October 13 (155 days, 12 WNV)
- Pershing County: May 4 to October 4 (153 days, 0 WNV)
- Lander County: May 12 to October 1 (142 days, 1 WNV)
- Humboldt County: May 13 to September 25 (135 days, 3 WNV)
West Nile in Eureka County
CDC ArboNET lists no human West Nile cases for Eureka County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 2 of those years.
Background: when the season starts across the US; how the dates are worked out.