Mosquito season in Morehouse Parish, LA: when it starts and ends

Mosquito months in Morehouse Parish

In a normal year mosquito season in Morehouse Parish, LA starts around March 2 and ends around November 26, about 38 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 Morehouse Parish, and when

• Start tipping out standing water weekly by February 16.
• Book any yard treatment for early March, ahead of the July peak.
• Repellent can go away after November 26.
• 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.

Morehouse Parish against the rest of LA

Morehouse Parish has the 57th longest season of 64 LA counties, at 269 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 63.8°F.

• Webster Parish: March 1 to November 27 (271 days, 9 WNV)
• LaSalle Parish: March 1 to November 25 (269 days, 1 WNV)
• Tensas Parish: February 27 to November 22 (268 days, 0 WNV)
• Vernon Parish: February 28 to November 23 (268 days, 0 WNV)

West Nile in Morehouse Parish

From 1999 to 2025, CDC ArboNET counted 15 human West Nile cases in Morehouse Parish (12 neuroinvasive) across 11 years. The worst was 2017 with 2; the latest was 2025.

Background: reading the West Nile counts; how the dates are worked out.