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

Mosquito months in Falls County

In a normal year mosquito season in Falls County, TX starts around March 8 and ends around November 18, about 36 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 Falls County, and when

• Start tipping out standing water weekly by February 22.
• Book any yard treatment for early March, ahead of the August peak.
• Repellent can go away after November 18.
• 1 West Nile case since 2016 (last 2016): you should use repellent at dusk May to September, more so if over 60.

Falls County against the rest of TX

Falls County has the 162nd longest season of 254 TX counties, at 255 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 65.5°F.

• Palo Pinto County: March 9 to November 20 (256 days, 4 WNV)
• Winkler County: March 9 to November 20 (256 days, 0 WNV)
• Kimble County: March 9 to November 19 (255 days, 0 WNV)
• Upshur County: March 9 to November 19 (255 days, 7 WNV)

West Nile in Falls County

From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Falls County (2 neuroinvasive) across 3 years. The worst was 2016 with 1; the latest was 2016.

Background: when mosquitoes go away for the winter; how the dates are worked out.