Mosquito season in Dallas County, AL: when it starts and ends

Mosquito months in Dallas County

In a normal year mosquito season in Dallas County, AL starts around February 24 and ends around December 1, 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 Dallas County, and when

• Start tipping out standing water weekly by February 10.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after December 1.
• 4 West Nile cases since 2016 (last 2024): you should use repellent at dusk May to September, more so if over 60.

Dallas County against the rest of AL

Dallas County has the 10th longest season of 67 AL counties, at 280 days against 330 in Montgomery County and 218 in Marion County. Its mean temperature is 64.8°F.

• Houston County: February 19 to December 9 (293 days, 1 WNV)
• Pike County: February 24 to December 7 (286 days, 0 WNV)
• Barbour County: February 28 to December 3 (278 days, 0 WNV)
• Conecuh County: February 28 to December 3 (278 days, 0 WNV)

West Nile in Dallas County

From 1999 to 2025, CDC ArboNET counted 10 human West Nile cases in Dallas County (4 neuroinvasive) across 8 years. The worst was 2017 with 2; the latest was 2024.

See how the dates are worked out, and reading the West Nile counts.