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

Mosquito months in Austin County

In a normal year mosquito season in Austin County, TX starts around February 10 and ends around December 20, about 45 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 Austin County, and when

• Start tipping out standing water weekly by January 27.
• Book any yard treatment for early February, ahead of the August peak.
• Repellent can go away after December 20.
• No West Nile cases since 2016, so bites in Austin County are a nuisance; check window screens.

Austin County against the rest of TX

Austin County has the 51st longest season of 254 TX counties, at 313 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 69.1°F.

• Bexar County: February 5 to December 15 (313 days, 30 WNV)
• Goliad County: February 5 to December 15 (313 days, 0 WNV)
• Travis County: February 27 to January 6 (313 days, 56 WNV)
• Orange County: February 3 to December 12 (312 days, 4 WNV)

West Nile in Austin County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Austin County (2 neuroinvasive) across 2 years. The worst was 2014 with 2; the latest was 2014.

See how the dates are worked out, and when mosquitoes go away for the winter.