Mosquito season in Mason County, TX: when it starts and ends
Mosquito months in Mason County
In a normal year mosquito season in Mason County, TX starts around March 4 and ends around November 26, about 38 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Mason County, and when
- Start tipping out standing water weekly by February 18.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 26.
- No West Nile cases since 2016, so bites in Mason County are a nuisance; check window screens.
Mason County against the rest of TX
Mason County has the 122nd longest season of 254 TX counties, at 267 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 65.9°F.
- Freestone County: March 4 to November 26 (267 days, 3 WNV)
- Hays County: March 4 to November 26 (267 days, 6 WNV)
- Andrews County: March 4 to November 25 (266 days, 0 WNV)
- Reagan County: March 4 to November 25 (266 days, 0 WNV)
West Nile in Mason County
CDC ArboNET lists no human West Nile cases for Mason County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 3 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.