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

Mosquito months in Iberia Parish

In a normal year mosquito season in Iberia Parish, LA starts around January 21 and ends around January 6, about 50 weeks.

What to do in Iberia Parish, and when

Start tipping out standing water weekly by January 7.
Book any yard treatment for late January, ahead of the August peak.
Repellent can go away after January 6.
5 West Nile cases since 2016 (last 2024): you should use repellent at dusk May to October, more so if over 60.

Iberia Parish against the rest of LA

Iberia Parish has the 4th longest season of 64 LA counties, at 350 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 68.9°F.

Plaquemines Parish: January 17 to January 9 (357 days, 0 WNV)
St. Charles Parish: January 20 to January 7 (352 days, 2 WNV)
St. Mary Parish: January 21 to January 6 (350 days, 0 WNV)
Jefferson Parish: January 23 to January 7 (349 days, 7 WNV)

West Nile in Iberia Parish

From 1999 to 2025, CDC ArboNET counted 17 human West Nile cases in Iberia Parish (13 neuroinvasive) across 8 years. The worst was 2005 with 4; the latest was 2024.

Background: where mosquitoes never stop; how the dates are worked out.