Mosquito season in Ouachita County, AR: when it starts and ends
Mosquito months in Ouachita County
In a normal year mosquito season in Ouachita County, AR starts around March 6 and ends around November 19, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Ouachita County, and when
- Start tipping out standing water weekly by February 20.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 19.
- 2 West Nile cases since 2016 (last 2017): you should use repellent at dusk May to September, more so if over 60.
Ouachita County against the rest of AR
Ouachita County has the 18th longest season of 75 AR counties, at 258 days against 274 in Chicot County and 211 in Washington County. Its mean temperature is 62.4°F.
- Lee County: March 7 to November 22 (260 days, 0 WNV)
- Calhoun County: March 6 to November 19 (258 days, 0 WNV)
- Monroe County: March 7 to November 18 (257 days, 0 WNV)
- Woodruff County: March 7 to November 19 (256 days, 0 WNV)
West Nile in Ouachita County
From 1999 to 2025, CDC ArboNET counted 4 human West Nile cases in Ouachita County (3 neuroinvasive) across 4 years. The worst was 2017 with 1; the latest was 2017.
Background: when the season starts across the US; how the dates are worked out.