Mosquito season in Gentry County, MO: when it starts and ends

Mosquito months in Gentry County

In a normal year mosquito season in Gentry County, MO starts around April 11 and ends around October 25, about 28 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 Gentry County, and when

• Start tipping out standing water weekly by March 28.
• Book any yard treatment for mid April, ahead of the July peak.
• Repellent can go away after October 25.
• No West Nile cases since 2016, so bites in Gentry County are a nuisance; check window screens.

Gentry County against the rest of MO

Gentry County has the 99th longest season of 115 MO counties, at 198 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 52.2°F.

• Madison County: April 10 to October 26 (199 days, 0 WNV)
• Shelby County: April 11 to October 27 (199 days, 0 WNV)
• Daviess County: April 10 to October 24 (197 days, 0 WNV)
• Harrison County: April 10 to October 25 (197 days, 1 WNV)

West Nile in Gentry County

CDC ArboNET lists no human West Nile cases for Gentry County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 4 of those years.

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