Mosquito season in Sutton County, TX: when it starts and ends

Mosquito months in Sutton County

In a normal year mosquito season in Sutton County, TX starts around March 13 and ends around November 16, about 35 weeks.

1. Jan
2. Feb
3. Mar
4. Apr
5. May
6. Jun
7. Jul
8. Aug
9. Sep
10. Oct
11. Nov
12. Dec

What to do in Sutton County, and when

• Start tipping out standing water weekly by February 27.
• Book any yard treatment for mid March, ahead of the July peak.
• Repellent can go away after November 16.
• No West Nile cases since 2016, so bites in Sutton County are a nuisance; check window screens.

Sutton County against the rest of TX

Sutton County has the 182nd longest season of 254 TX counties, at 248 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 65.4°F.

• Shackelford County: March 13 to November 18 (250 days, 0 WNV)
• Baylor County: March 12 to November 15 (248 days, 0 WNV)
• Callahan County: March 14 to November 16 (247 days, 2 WNV)
• Jack County: March 14 to November 16 (247 days, 0 WNV)

West Nile in Sutton County

CDC ArboNET lists no human West Nile cases for Sutton County from 1999 to 2025.

See how the dates are worked out, and when the season starts across the US.