Mosquito season in Caddo Parish, LA: when it starts and ends

Mosquito months in Caddo Parish

In a normal year mosquito season in Caddo Parish, LA starts around February 11 and ends around December 10, about 43 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 Caddo Parish, and when

• Start tipping out standing water weekly by January 28.
• Book any yard treatment for mid February, ahead of the July peak.
• Repellent can go away after December 10.
• 47 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check LA spray notices.

Caddo Parish against the rest of LA

Caddo Parish has the 36th longest season of 64 LA counties, at 302 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 66.1°F.

• Iberville Parish: February 8 to December 9 (304 days, 4 WNV)
• West Baton Rouge Parish: February 8 to December 9 (304 days, 6 WNV)
• Madison Parish: February 13 to December 10 (300 days, 1 WNV)
• St. Tammany Parish: February 14 to December 6 (295 days, 38 WNV)

West Nile in Caddo Parish

From 1999 to 2025, CDC ArboNET counted 242 human West Nile cases in Caddo Parish (156 neuroinvasive) across 22 years. The worst was 2012 with 43; the latest was 2025.

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