Mosquito season in Polk County, AR: when it starts and ends
Mosquito months in Polk County
In a normal year mosquito season in Polk County, AR starts around March 22 and ends around November 10, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Polk County, and when
- Start tipping out standing water weekly by March 8.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 10.
- No West Nile cases since 2016, so bites in Polk County are a nuisance; check window screens.
Polk County against the rest of AR
Polk County has the 61st longest season of 75 AR counties, at 233 days against 274 in Chicot County and 211 in Washington County. Its mean temperature is 59.2°F.
- Marion County: March 20 to November 9 (234 days, 1 WNV)
- Pike County: March 22 to November 11 (234 days, 0 WNV)
- Boone County: March 24 to November 10 (231 days, 0 WNV)
- Carroll County: March 26 to November 10 (229 days, 0 WNV)
West Nile in Polk County
CDC ArboNET lists no human West Nile cases for Polk 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.