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

Mosquito months in Wichita County

In a normal year mosquito season in Wichita County, TX starts around March 12 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 Wichita County, and when

• Start tipping out standing water weekly by February 26.
• Book any yard treatment for mid March, ahead of the July peak.
• Repellent can go away after November 18.
• 13 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check TX spray notices.

Wichita County against the rest of TX

Wichita County has the 177th longest season of 254 TX counties, at 251 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 63.6°F.

• Somervell County: March 11 to November 18 (252 days, 1 WNV)
• Loving County: March 10 to November 16 (251 days, 0 WNV)
• Bowie County: March 11 to November 16 (250 days, 8 WNV)
• Coke County: March 12 to November 17 (250 days, 0 WNV)

West Nile in Wichita County

From 1999 to 2025, CDC ArboNET counted 34 human West Nile cases in Wichita County (26 neuroinvasive) across 10 years. The worst was 2024 with 10; the latest was 2025.

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