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

Mosquito months in Parker County

In a normal year mosquito season in Parker County, TX starts around March 10 and ends around November 19, 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 Parker County, and when

• Start tipping out standing water weekly by February 24.
• Book any yard treatment for early March, ahead of the July peak.
• Repellent can go away after November 19.
• 8 West Nile cases since 2016 (last 2024): you should use repellent at dusk May to September, more so if over 60.

Parker County against the rest of TX

Parker County has the 170th longest season of 254 TX counties, at 254 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 64.3°F.

• Wilbarger County: March 9 to November 18 (254 days, 2 WNV)
• Borden County: March 10 to November 19 (254 days, 0 WNV)
• Montague County: March 11 to November 20 (254 days, 1 WNV)
• Crockett County: March 8 to November 16 (253 days, 0 WNV)

West Nile in Parker County

From 1999 to 2025, CDC ArboNET counted 17 human West Nile cases in Parker County (14 neuroinvasive) across 6 years. The worst was 2012 with 6; the latest was 2024.

More: how the dates are worked out · reading the West Nile counts.