Mosquito season in Grant County, AR: when it starts and ends
Mosquito months in Grant County
In a normal year mosquito season in Grant County, AR starts around March 16 and ends around November 15, about 35 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Grant County, and when
- Start tipping out standing water weekly by March 2.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 15.
- No West Nile cases since 2016, so bites in Grant County are a nuisance; check window screens.
Grant County against the rest of AR
Grant County has the 47th longest season of 75 AR counties, at 244 days against 274 in Chicot County and 211 in Washington County. Its mean temperature is 61.4°F.
- Columbia County: March 14 to November 13 (244 days, 3 WNV)
- Poinsett County: March 15 to November 14 (244 days, 0 WNV)
- Cleburne County: March 16 to November 14 (243 days, 0 WNV)
- Hot Spring County: March 18 to November 16 (243 days, 0 WNV)
West Nile in Grant County
CDC ArboNET lists no human West Nile cases for Grant County from 1999 to 2025, though virus turned up in birds, mosquitoes or horses in 1 of those years.
Background: when the season starts across the US; how the dates are worked out.