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

Mosquito months in Warren County

In a normal year mosquito season in Warren County, MS starts around February 8 and ends around December 4, about 43 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 Warren County, and when

• Start tipping out standing water weekly by January 25.
• Book any yard treatment for early February, ahead of the July peak.
• Repellent can go away after December 4.
• 1 West Nile case since 2016 (last 2021): you should use repellent at dusk May to September, more so if over 60.

Warren County against the rest of MS

Warren County has the 8th longest season of 82 MS counties, at 299 days against 333 in Harrison County and 221 in Tishomingo County. Its mean temperature is 66.2°F.

• George County: February 13 to December 14 (304 days, 0 WNV)
• Yazoo County: February 15 to December 13 (301 days, 4 WNV)
• Jackson County: February 12 to December 8 (299 days, 11 WNV)
• Hancock County: February 16 to December 4 (291 days, 1 WNV)

West Nile in Warren County

From 1999 to 2025, CDC ArboNET counted 15 human West Nile cases in Warren County (9 neuroinvasive) across 7 years. The worst was 2006 with 4; the latest was 2021.

Background: when the season starts across the US; how the dates are worked out.