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

Mosquito months in Miller County

In a normal year mosquito season in Miller County, AR starts around February 28 and ends around November 27, about 39 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 Miller County, and when

• Start tipping out standing water weekly by February 14.
• Book any yard treatment for late February, ahead of the July peak.
• Repellent can go away after November 27.
• 4 West Nile cases since 2016 (last 2025): you should use repellent at dusk May to September, more so if over 60.

Miller County against the rest of AR

Miller County has the 3rd longest season of 75 AR counties, at 272 days against 274 in Chicot County and 211 in Washington County. Its mean temperature is 64.2°F.

• Chicot County: February 28 to November 29 (274 days, 1 WNV)
• Desha County: February 28 to November 27 (272 days, 1 WNV)
• Lincoln County: March 2 to November 29 (272 days, 2 WNV)
• Arkansas County: February 28 to November 25 (270 days, 0 WNV)

West Nile in Miller County

From 1999 to 2025, CDC ArboNET counted 15 human West Nile cases in Miller County (12 neuroinvasive) across 8 years. The worst was 2012 with 5; the latest was 2025.

See how the dates are worked out, and reading the West Nile counts.