Mosquito season in Churchill County, NV: when it starts and ends
Mosquito months in Churchill County
In a normal year mosquito season in Churchill County, NV starts around May 28 and ends around September 24, about 17 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Churchill County, and when
- Start tipping out standing water weekly by May 14.
- Book any yard treatment for late May, ahead of the July peak.
- Repellent can go away after September 24.
- 21 West Nile cases since 2016: you should wear EPA-registered repellent at dusk July to August, and check NV spray notices.
Churchill County against the rest of NV
Churchill County has the 15th longest season of 17 NV counties, at 119 days against 323 in Clark County and 107 in White Pine County. Its mean temperature is 51.2°F.
- Lander County: May 12 to October 1 (142 days, 1 WNV)
- Humboldt County: May 13 to September 25 (135 days, 3 WNV)
- Elko County: May 23 to September 7 (107 days, 2 WNV)
- White Pine County: June 3 to September 18 (107 days, 0 WNV)
West Nile in Churchill County
From 1999 to 2025, CDC ArboNET counted 58 human West Nile cases in Churchill County (24 neuroinvasive) across 13 years. The worst was 2004 with 15; the latest was 2024.
Background: reading the West Nile counts; how the dates are worked out.