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

Mosquito months in Jeff Davis County

In a normal year mosquito season in Jeff Davis County, TX starts around April 3 and ends around November 6, about 31 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 Jeff Davis County, and when

• Start tipping out standing water weekly by March 20.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after November 6.
• No West Nile cases since 2016, so bites in Jeff Davis County are a nuisance; check window screens.

Jeff Davis County against the rest of TX

Jeff Davis County has the 236th longest season of 254 TX counties, at 217 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 59.5°F.

• Briscoe County: April 3 to November 6 (217 days, 2 WNV)
• Carson County: April 3 to November 6 (217 days, 2 WNV)
• Gray County: April 4 to November 5 (215 days, 2 WNV)
• Donley County: April 3 to November 3 (214 days, 1 WNV)

West Nile in Jeff Davis County

From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Jeff Davis County (1 neuroinvasive) across 1 year. The worst was 2004 with 1; the latest was 2004.

See how the dates are worked out, and when the season starts across the US.