Mosquito season in Pershing County, NV: when it starts and ends

Mosquito months in Pershing County

In a normal year mosquito season in Pershing County, NV starts around May 4 and ends around October 4, about 22 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 Pershing County, and when

• Start tipping out standing water weekly by April 20.
• Book any yard treatment for early May, ahead of the July peak.
• Repellent can go away after October 4.
• No West Nile cases since 2016, so bites in Pershing County are a nuisance; check window screens.

Pershing County against the rest of NV

Pershing County has the 11th longest season of 17 NV counties, at 153 days against 323 in Clark County and 107 in White Pine County. Its mean temperature is 51.2°F.

• Washoe County: April 28 to October 13 (168 days, 31 WNV)
• Douglas County: May 11 to October 13 (155 days, 12 WNV)
• Eureka County: May 12 to October 1 (142 days, 0 WNV)
• Lander County: May 12 to October 1 (142 days, 1 WNV)

West Nile in Pershing County

From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in Pershing County (0 neuroinvasive) across 2 years. The worst was 2006 with 8; the latest was 2007.

Background: when mosquitoes go away for the winter; how the dates are worked out.