Mosquito season in Calcasieu Parish, LA: when it starts and ends
Mosquito months in Calcasieu Parish
In a normal year mosquito season in Calcasieu Parish, LA starts around January 27 and ends around January 3, about 49 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Calcasieu Parish, and when
- Start tipping out standing water weekly by January 13.
- Book any yard treatment for late January, ahead of the July peak.
- Repellent can go away after January 3.
- 16 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check LA spray notices.
Calcasieu Parish against the rest of LA
Calcasieu Parish has the 9th longest season of 64 LA counties, at 341 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 68.6°F.
- Cameron Parish: January 22 to January 3 (346 days, 0 WNV)
- Terrebonne Parish: January 26 to January 2 (341 days, 4 WNV)
- Lafourche Parish: January 28 to January 3 (340 days, 8 WNV)
- Evangeline Parish: February 5 to January 11 (340 days, 2 WNV)
West Nile in Calcasieu Parish
From 1999 to 2025, CDC ArboNET counted 71 human West Nile cases in Calcasieu Parish (41 neuroinvasive) across 16 years. The worst was 2012 with 19; the latest was 2025.
More: how the dates are worked out · where mosquitoes never stop.