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

Mosquito months in Van Zandt County

In a normal year mosquito season in Van Zandt County, TX starts around February 28 and ends around December 3, about 40 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 Van Zandt County, and when

• Start tipping out standing water weekly by February 14.
• Book any yard treatment for late February, ahead of the August peak.
• Repellent can go away after December 3.
• 9 West Nile cases since 2016 (last 2021): you should use repellent at dusk May to September, more so if over 60.

Van Zandt County against the rest of TX

Van Zandt County has the 91st longest season of 254 TX counties, at 278 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 64.6°F.

• Rockwall County: February 26 to December 1 (278 days, 5 WNV)
• Tarrant County: February 26 to December 1 (278 days, 236 WNV)
• Val Verde County: February 25 to November 29 (277 days, 1 WNV)
• Angelina County: February 25 to November 28 (276 days, 14 WNV)

West Nile in Van Zandt County

From 1999 to 2025, CDC ArboNET counted 18 human West Nile cases in Van Zandt County (9 neuroinvasive) across 5 years. The worst was 2012 with 8; the latest was 2021.

Background: reading the West Nile counts; how the dates are worked out.