Mosquito season in De Soto Parish, LA: when it starts and ends
Mosquito months in De Soto Parish
In a normal year mosquito season in De Soto Parish, LA starts around February 22 and ends around December 1, about 40 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in De Soto Parish, and when
- Start tipping out standing water weekly by February 8.
- Book any yard treatment for late February, ahead of the July peak.
- Repellent can go away after December 1.
- 10 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check LA spray notices.
De Soto Parish against the rest of LA
De Soto Parish has the 47th longest season of 64 LA counties, at 282 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 65.5°F.
- Livingston Parish: February 21 to December 2 (284 days, 42 WNV)
- Tangipahoa Parish: February 21 to December 2 (284 days, 21 WNV)
- Jackson Parish: February 24 to December 1 (280 days, 1 WNV)
- Lincoln Parish: February 24 to December 1 (280 days, 5 WNV)
West Nile in De Soto Parish
From 1999 to 2025, CDC ArboNET counted 20 human West Nile cases in De Soto Parish (13 neuroinvasive) across 11 years. The worst was 2012 with 4; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.