Mosquito season in Lyon County, NV: when it starts and ends
Mosquito months in Lyon County
In a normal year mosquito season in Lyon County, NV starts around April 13 and ends around October 23, about 28 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Lyon County, and when
- Start tipping out standing water weekly by March 30.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 23.
- 17 West Nile cases since 2016: you should wear EPA-registered repellent at dusk July to August, and check NV spray notices.
Lyon County against the rest of NV
Lyon County has the 4th longest season of 17 NV counties, at 193 days against 323 in Clark County and 107 in White Pine County. Its mean temperature is 53°F.
- Mineral County: April 5 to November 1 (210 days, 0 WNV)
- Esmeralda County: April 12 to October 23 (194 days, 0 WNV)
- Lincoln County: April 20 to October 20 (183 days, 0 WNV)
- Carson City: April 20 to October 18 (181 days, 6 WNV)
West Nile in Lyon County
From 1999 to 2025, CDC ArboNET counted 47 human West Nile cases in Lyon County (15 neuroinvasive) across 11 years. The worst was 2006 with 17; the latest was 2021.
See how the dates are worked out, and reading the West Nile counts.