Mosquito season in Forrest County, MS: when it starts and ends
Mosquito months in Forrest County
In a normal year mosquito season in Forrest County, MS starts around February 20 and ends around December 4, about 41 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Forrest County, and when
- Start tipping out standing water weekly by February 6.
- Book any yard treatment for mid February, ahead of the July peak.
- Repellent can go away after December 4.
- 18 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check MS spray notices.
Forrest County against the rest of MS
Forrest County has the 14th longest season of 82 MS counties, at 287 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 66.4°F.
- Issaquena County: February 21 to December 6 (288 days, 0 WNV)
- Humphreys County: February 19 to December 4 (287 days, 3 WNV)
- Lamar County: February 20 to December 4 (287 days, 6 WNV)
- Sharkey County: February 21 to December 5 (287 days, 0 WNV)
West Nile in Forrest County
From 1999 to 2025, CDC ArboNET counted 114 human West Nile cases in Forrest County (79 neuroinvasive) across 19 years. The worst was 2006 with 29; the latest was 2025.
See how the dates are worked out, and reading the West Nile counts.