Mosquito season in Sunflower County, MS: when it starts and ends

Mosquito months in Sunflower County

In a normal year mosquito season in Sunflower County, MS starts around February 26 and ends around November 28, about 39 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 Sunflower County, and when

• Start tipping out standing water weekly by February 12.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after November 28.
• 4 West Nile cases since 2016 (last 2023): you should use repellent at dusk May to September, more so if over 60.

Sunflower County against the rest of MS

Sunflower County has the 18th longest season of 82 MS counties, at 276 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 63.7°F.

• Sharkey County: February 21 to December 5 (287 days, 0 WNV)
• Tallahatchie County: February 24 to November 29 (278 days, 0 WNV)
• Walthall County: February 28 to December 1 (276 days, 1 WNV)
• Wilkinson County: February 28 to December 1 (276 days, 1 WNV)

West Nile in Sunflower County

From 1999 to 2025, CDC ArboNET counted 21 human West Nile cases in Sunflower County (10 neuroinvasive) across 9 years. The worst was 2012 with 9; the latest was 2023.

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