Mosquito season in Benton County, AR: when it starts and ends

Mosquito months in Benton County

In a normal year mosquito season in Benton County, AR starts around March 31 and ends around November 4, about 31 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 Benton County, and when

• Start tipping out standing water weekly by March 17.
• Book any yard treatment for late March, ahead of the July peak.
• Repellent can go away after November 4.
• 2 West Nile cases since 2016 (last 2021): you should use repellent at dusk June to September, more so if over 60.

Benton County against the rest of AR

Benton County has the 74th longest season of 75 AR counties, at 218 days against 274 in Chicot County and 211 in Washington County. Its mean temperature is 57.7°F.

• Searcy County: March 30 to November 6 (221 days, 0 WNV)
• Van Buren County: March 30 to November 6 (221 days, 0 WNV)
• Washington County: April 3 to October 31 (211 days, 3 WNV)

West Nile in Benton County

From 1999 to 2025, CDC ArboNET counted 9 human West Nile cases in Benton County (7 neuroinvasive) across 7 years. The worst was 2012 with 2; the latest was 2021.

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