Mosquito season in St. Francis County, AR: when it starts and ends
Mosquito months in St. Francis County
In a normal year mosquito season in St. Francis County, AR starts around March 9 and ends around November 20, about 37 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in St. Francis County, and when
- Start tipping out standing water weekly by February 23.
- Book any yard treatment for early March, ahead of the July peak.
- Repellent can go away after November 20.
- No West Nile cases since 2016, so bites in St. Francis County are a nuisance; check window screens.
St. Francis County against the rest of AR
St. Francis County has the 23rd longest season of 75 AR counties, at 256 days against 274 in Chicot County and 211 in Washington County. Its mean temperature is 62°F.
- Yell County: March 8 to November 19 (256 days, 0 WNV)
- Cross County: March 9 to November 20 (256 days, 0 WNV)
- Howard County: March 10 to November 21 (256 days, 0 WNV)
- Lonoke County: March 8 to November 18 (255 days, 2 WNV)
West Nile in St. Francis County
From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in St. Francis County (1 neuroinvasive) across 1 year. The worst was 2012 with 1; the latest was 2012.
See how the dates are worked out, and when the season starts across the US.