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

Mosquito months in Lee County

In a normal year mosquito season in Lee County, TX starts around February 17 and ends around January 13, about 47 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 Lee County, and when

• Start tipping out standing water weekly by February 3.
• Book any yard treatment for mid February, ahead of the August peak.
• Repellent can go away after January 13.
• No West Nile cases since 2016, so bites in Lee County are a nuisance; check window screens.

Lee County against the rest of TX

Lee County has the 34th longest season of 254 TX counties, at 330 days against 365 in Cameron County and 191 in Lipscomb County. Its mean temperature is 68.1°F.

• McMullen County: January 21 to December 17 (330 days, 0 WNV)
• Webb County: January 31 to December 27 (330 days, 3 WNV)
• Liberty County: January 30 to December 22 (326 days, 4 WNV)
• Wharton County: February 2 to December 25 (326 days, 3 WNV)

West Nile in Lee County

From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Lee County (0 neuroinvasive) across 1 year. The worst was 2003 with 1; the latest was 2003.

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