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

Mosquito months in Rapides Parish

In a normal year mosquito season in Rapides Parish, LA starts around February 16 and ends around December 7, about 42 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 Rapides Parish, and when

• Start tipping out standing water weekly by February 2.
• Book any yard treatment for mid February, ahead of the August peak.
• Repellent can go away after December 7.
• 29 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check LA spray notices.

Rapides Parish against the rest of LA

Rapides Parish has the 39th longest season of 64 LA counties, at 294 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 66.8°F.

• Madison Parish: February 13 to December 10 (300 days, 1 WNV)
• St. Tammany Parish: February 14 to December 6 (295 days, 38 WNV)
• East Carroll Parish: February 21 to December 6 (288 days, 0 WNV)
• West Carroll Parish: February 21 to December 6 (288 days, 1 WNV)

West Nile in Rapides Parish

From 1999 to 2025, CDC ArboNET counted 114 human West Nile cases in Rapides Parish (84 neuroinvasive) across 19 years. The worst was 2002 with 22; the latest was 2024.

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