Mosquito season in Assumption Parish, LA: when it starts and ends
Mosquito months in Assumption Parish
In a normal year mosquito season in Assumption Parish, LA starts around February 1 and ends around December 28, about 47 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Assumption Parish, and when
- Start tipping out standing water weekly by January 18.
- Book any yard treatment for early February, ahead of the July peak.
- Repellent can go away after December 28.
- 3 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to October, more so if over 60.
Assumption Parish against the rest of LA
Assumption Parish has the 20th longest season of 64 LA counties, at 330 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 69.1°F.
- Vermilion Parish: January 29 to December 25 (330 days, 1 WNV)
- Ascension Parish: February 1 to December 28 (330 days, 19 WNV)
- St. Martin Parish: January 29 to December 24 (329 days, 2 WNV)
- Acadia Parish: January 31 to December 26 (329 days, 1 WNV)
West Nile in Assumption Parish
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Assumption Parish (4 neuroinvasive) across 6 years. The worst was 2025 with 1; the latest was 2025.
More: how the dates are worked out · where mosquitoes never stop.