Mosquito season in Moody County, SD: when it starts and ends

Mosquito months in Moody County

In a normal year mosquito season in Moody County, SD starts around May 1 and ends around October 7, about 23 weeks.

What to do in Moody County, and when

Start tipping out standing water weekly by April 17.
Book any yard treatment for early May, ahead of the July peak.
Repellent can go away after October 7.
3 West Nile cases since 2016 (last 2023): you should use repellent at dusk July to July, more so if over 60.

Moody County against the rest of SD

Moody County has the 46th longest season of 66 SD counties, at 159 days against 179 in Yankton County and 139 in Lawrence County. Its mean temperature is 43.6°F.

Brown County: April 30 to October 6 (159 days, 71 WNV)
Sanborn County: April 30 to October 6 (159 days, 6 WNV)
Walworth County: May 1 to October 7 (159 days, 17 WNV)
Butte County: May 2 to October 8 (159 days, 3 WNV)

West Nile in Moody County

From 1999 to 2025, CDC ArboNET counted 13 human West Nile cases in Moody County (4 neuroinvasive) across 10 years. The worst was 2013 with 2; the latest was 2023.

See how the dates are worked out, and when the season starts across the US.