Mosquito season in Alcorn County, MS: when it starts and ends
Mosquito months in Alcorn County
In a normal year mosquito season in Alcorn County, MS starts around March 20 and ends around November 11, about 34 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Alcorn County, and when
- Start tipping out standing water weekly by March 6.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 11.
- 2 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.
Alcorn County against the rest of MS
Alcorn County has the 75th longest season of 82 MS counties, at 236 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 60.5°F.
- Holmes County: March 16 to November 12 (241 days, 1 WNV)
- Prentiss County: March 20 to November 13 (238 days, 3 WNV)
- Lafayette County: March 21 to November 12 (236 days, 0 WNV)
- Tippah County: March 21 to November 10 (234 days, 0 WNV)
West Nile in Alcorn County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Alcorn County (4 neuroinvasive) across 2 years. The worst was 2025 with 2; the latest was 2025.
More: how the dates are worked out · when the season starts across the US.