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

Mosquito months in Monroe County

In a normal year mosquito season in Monroe County, MS starts around March 14 and ends around November 15, about 35 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 Monroe County, and when

• Start tipping out standing water weekly by February 28.
• Book any yard treatment for mid March, ahead of the July peak.
• Repellent can go away after November 15.
• 5 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.

Monroe County against the rest of MS

Monroe County has the 67th longest season of 82 MS counties, at 246 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 61.6°F.

• DeSoto County: March 13 to November 16 (248 days, 6 WNV)
• Chickasaw County: March 12 to November 14 (247 days, 2 WNV)
• Choctaw County: March 16 to November 16 (245 days, 0 WNV)
• Webster County: March 16 to November 16 (245 days, 0 WNV)

West Nile in Monroe County

From 1999 to 2025, CDC ArboNET counted 14 human West Nile cases in Monroe County (7 neuroinvasive) across 9 years. The worst was 2002 with 4; the latest was 2025.

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