Mosquito season in St. Martin Parish, LA: when it starts and ends

Mosquito months in St. Martin Parish

In a normal year mosquito season in St. Martin Parish, LA starts around January 29 and ends around December 24, about 47 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 St. Martin Parish, and when

• Start tipping out standing water weekly by January 15.
• Book any yard treatment for late January, ahead of the July peak.
• Repellent can go away after December 24.
• 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk May to September, more so if over 60.

St. Martin Parish against the rest of LA

St. Martin Parish has the 21st longest season of 64 LA counties, at 329 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 67.8°F.

• Ascension Parish: February 1 to December 28 (330 days, 19 WNV)
• Assumption Parish: February 1 to December 28 (330 days, 3 WNV)
• Acadia Parish: January 31 to December 26 (329 days, 1 WNV)
• Avoyelles Parish: February 7 to January 2 (329 days, 1 WNV)

West Nile in St. Martin Parish

From 1999 to 2025, CDC ArboNET counted 7 human West Nile cases in St. Martin Parish (4 neuroinvasive) across 6 years. The worst was 2013 with 2; the latest was 2023.

More: how the dates are worked out · when the season starts across the US.