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

Mosquito months in Jones County

In a normal year mosquito season in Jones County, SD starts around April 27 and ends around October 13, about 24 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 Jones County, and when

• Start tipping out standing water weekly by April 13.
• Book any yard treatment for late April, ahead of the July peak.
• Repellent can go away after October 13.
• No West Nile cases since 2016, so bites in Jones County are a nuisance; check window screens.

Jones County against the rest of SD

Jones County has the 15th longest season of 66 SD counties, at 168 days against 179 in Yankton County and 139 in Lawrence County. Its mean temperature is 47.4°F.

• Lincoln County: April 24 to October 11 (170 days, 39 WNV)
• Gregory County: April 26 to October 13 (170 days, 3 WNV)
• Aurora County: April 27 to October 11 (167 days, 5 WNV)
• Miner County: April 27 to October 11 (167 days, 5 WNV)

West Nile in Jones County

From 1999 to 2025, CDC ArboNET counted 8 human West Nile cases in Jones County (2 neuroinvasive) across 3 years. The worst was 2013 with 4; the latest was 2013.

See how the dates are worked out, and when mosquitoes go away for the winter.