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

Mosquito months in Copiah County

In a normal year mosquito season in Copiah County, MS starts around February 28 and ends around November 27, 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 Copiah County, and when

• Start tipping out standing water weekly by February 14.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after November 27.
• 9 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.

Copiah County against the rest of MS

Copiah County has the 26th longest season of 82 MS counties, at 272 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 65.6°F.

• Kemper County: February 27 to November 27 (273 days, 0 WNV)
• Rankin County: February 28 to November 28 (273 days, 32 WNV)
• Lauderdale County: February 28 to November 27 (272 days, 2 WNV)
• Lincoln County: March 1 to November 28 (272 days, 8 WNV)

West Nile in Copiah County

From 1999 to 2025, CDC ArboNET counted 30 human West Nile cases in Copiah County (14 neuroinvasive) across 12 years. The worst was 2012 with 6; the latest was 2025.

See how the dates are worked out, and reading the West Nile counts.