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

Mosquito months in Iberville Parish

In a normal year mosquito season in Iberville Parish, LA starts around February 8 and ends around December 9, 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 Iberville Parish, and when

• Start tipping out standing water weekly by January 25.
• Book any yard treatment for early February, ahead of the July peak.
• Repellent can go away after December 9.
• 4 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.

Iberville Parish against the rest of LA

Iberville Parish has the 34th longest season of 64 LA counties, at 304 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 67.6°F.

• St. Landry Parish: February 6 to December 8 (305 days, 3 WNV)
• Richland Parish: February 9 to December 11 (305 days, 1 WNV)
• West Baton Rouge Parish: February 8 to December 9 (304 days, 6 WNV)
• Caddo Parish: February 11 to December 10 (302 days, 47 WNV)

West Nile in Iberville Parish

From 1999 to 2025, CDC ArboNET counted 22 human West Nile cases in Iberville Parish (8 neuroinvasive) across 8 years. The worst was 2012 with 5; the latest was 2025.

Background: reading the West Nile counts; how the dates are worked out.