Mosquito season in Reynolds County, MO: when it starts and ends
Mosquito months in Reynolds County
In a normal year mosquito season in Reynolds County, MO starts around March 28 and ends around November 3, about 31 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Reynolds County, and when
- Start tipping out standing water weekly by March 14.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 3.
- No West Nile cases since 2016, so bites in Reynolds County are a nuisance; check window screens.
Reynolds County against the rest of MO
Reynolds County has the 21st longest season of 115 MO counties, at 220 days against 242 in Pemiscot County and 187 in Crawford County. Its mean temperature is 56.1°F.
- Boone County: March 27 to November 4 (221 days, 5 WNV)
- Phelps County: March 28 to November 4 (220 days, 1 WNV)
- Cape Girardeau County: March 29 to November 4 (220 days, 1 WNV)
- Vernon County: March 29 to November 4 (220 days, 2 WNV)
West Nile in Reynolds County
CDC ArboNET lists no human West Nile cases for Reynolds County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
See how the dates are worked out, and when mosquitoes go away for the winter.