Mosquito season in Carson City, NV: when it starts and ends
Mosquito months in Carson City
In a normal year mosquito season in Carson City, NV starts around April 20 and ends around October 18, about 26 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Carson City, and when
- Start tipping out standing water weekly by April 6.
- Book any yard treatment for mid April, ahead of the July peak.
- Repellent can go away after October 18.
- 6 West Nile cases since 2016 (last 2018): you should use repellent at dusk July to August, more so if over 60.
Carson City against the rest of NV
Carson City has the 6th longest season of 17 NV counties, at 181 days against 323 in Clark County and 107 in White Pine County. Its mean temperature is 51.5°F.
- Lyon County: April 13 to October 23 (193 days, 17 WNV)
- Lincoln County: April 20 to October 20 (183 days, 0 WNV)
- Storey County: April 26 to October 23 (180 days, 0 WNV)
- Nye County: April 25 to October 11 (169 days, 2 WNV)
West Nile in Carson City
From 1999 to 2025, CDC ArboNET counted 15 human West Nile cases in Carson City (5 neuroinvasive) across 4 years. The worst was 2006 with 8; the latest was 2018.
See how the dates are worked out, and reading the West Nile counts.