Mosquito season in Madison County, MS: when it starts and ends
Mosquito months in Madison County
In a normal year mosquito season in Madison County, MS starts around March 7 and ends around November 19, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Madison County, and when
- Start tipping out standing water weekly by February 21.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 19.
- 25 West Nile cases since 2016: you should wear EPA-registered repellent at dusk May to September, and check MS spray notices.
Madison County against the rest of MS
Madison County has the 56th longest season of 82 MS counties, at 257 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 63.4°F.
- Oktibbeha County: March 7 to November 22 (260 days, 3 WNV)
- Amite County: March 6 to November 20 (259 days, 0 WNV)
- Newton County: March 9 to November 18 (254 days, 0 WNV)
- Tate County: March 9 to November 16 (252 days, 2 WNV)
West Nile in Madison County
From 1999 to 2025, CDC ArboNET counted 122 human West Nile cases in Madison County (55 neuroinvasive) across 18 years. The worst was 2012 with 25; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.