Mosquito season in Grant Parish, LA: when it starts and ends
Mosquito months in Grant Parish
In a normal year mosquito season in Grant Parish, LA starts around February 11 and ends around December 14, about 44 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Grant Parish, and when
- Start tipping out standing water weekly by January 28.
- Book any yard treatment for mid February, ahead of the July peak.
- Repellent can go away after December 14.
- 2 West Nile cases since 2016 (last 2018): you should use repellent at dusk May to September, more so if over 60.
Grant Parish against the rest of LA
Grant Parish has the 31st longest season of 64 LA counties, at 306 days against 358 in Orleans Parish and 247 in Claiborne Parish. Its mean temperature is 66.1°F.
- East Baton Rouge Parish: February 6 to December 11 (308 days, 65 WNV)
- West Feliciana Parish: February 7 to December 10 (306 days, 1 WNV)
- St. Landry Parish: February 6 to December 8 (305 days, 3 WNV)
- Richland Parish: February 9 to December 11 (305 days, 1 WNV)
West Nile in Grant Parish
From 1999 to 2025, CDC ArboNET counted 6 human West Nile cases in Grant Parish (6 neuroinvasive) across 4 years. The worst was 2012 with 3; the latest was 2018.
More: how the dates are worked out · when mosquitoes go away for the winter.