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

Mosquito months in Fort Bend County

In a normal year mosquito season in Fort Bend County, TX starts around January 26 and ends around December 29, about 48 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 Fort Bend County, and when

• Start tipping out standing water weekly by January 12.
• Book any yard treatment for late January, ahead of the August peak.
• Repellent can go away after December 29.
• 15 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to October, and check TX spray notices.

Fort Bend County against the rest of TX

Fort Bend County has the 23rd longest season of 254 TX counties, at 337 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 70.4°F.

• Trinity County: February 6 to January 12 (340 days, 2 WNV)
• Jefferson County: January 28 to January 1 (338 days, 8 WNV)
• Robertson County: February 6 to January 9 (337 days, 0 WNV)
• Comal County: February 10 to January 13 (337 days, 0 WNV)

West Nile in Fort Bend County

From 1999 to 2025, CDC ArboNET counted 42 human West Nile cases in Fort Bend County (29 neuroinvasive) across 13 years. The worst was 2012 with 14; the latest was 2024.

See how the dates are worked out, and where mosquitoes never stop.