Mosquito season in Amador County, CA: when it starts and ends
Mosquito months in Amador County
In a normal year mosquito season in Amador County, CA starts around March 7 and ends around November 23, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Amador County, and when
- Start tipping out standing water weekly by February 21.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 23.
- 3 West Nile cases since 2016 (last 2019): you should use repellent at dusk June to September, more so if over 60.
Amador County against the rest of CA
Amador County has the 37th longest season of 58 CA counties, at 261 days against 365 in Los Angeles County and 110 in Mono County. Its mean temperature is 59.5°F.
- Glenn County: March 1 to November 22 (266 days, 18 WNV)
- Madera County: March 4 to November 25 (266 days, 37 WNV)
- Monterey County: March 12 to November 22 (255 days, 5 WNV)
- San Benito County: March 12 to November 22 (255 days, 0 WNV)
West Nile in Amador County
From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in Amador County (4 neuroinvasive) across 5 years. The worst was 2005 with 3; the latest was 2019.
See how the dates are worked out, and when mosquitoes go away for the winter.