Mosquito season in Bienville Parish, LA: when it starts and ends
Mosquito months in Bienville Parish
In a normal year mosquito season in Bienville Parish, LA starts around March 4 and ends around November 23, about 38 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Bienville Parish, and when
- Start tipping out standing water weekly by February 18.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 23.
- 2 West Nile cases since 2016 (last 2023): you should use repellent at dusk May to September, more so if over 60.
Bienville Parish against the rest of LA
Bienville Parish has the 61st longest season of 64 LA counties, at 264 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 65.1°F.
- Vernon Parish: February 28 to November 23 (268 days, 0 WNV)
- Winn Parish: February 28 to November 23 (268 days, 0 WNV)
- Sabine Parish: March 6 to November 24 (263 days, 0 WNV)
- Red River Parish: March 7 to November 19 (257 days, 0 WNV)
West Nile in Bienville Parish
From 1999 to 2025, CDC ArboNET counted 3 human West Nile cases in Bienville Parish (2 neuroinvasive) across 3 years. The worst was 2023 with 1; the latest was 2023.
More: how the dates are worked out · when mosquitoes go away for the winter.