Mosquito season in Miner County, SD: when it starts and ends
Mosquito months in Miner County
In a normal year mosquito season in Miner County, SD starts around April 27 and ends around October 11, about 24 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Miner 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 11.
- 5 West Nile cases since 2016 (last 2025): you should use repellent at dusk July to August, more so if over 60.
Miner County against the rest of SD
Miner County has the 17th longest season of 66 SD counties, at 167 days against 179 in Yankton County and 139 in Lawrence County. Its mean temperature is 46.3°F.
- Jones County: April 27 to October 13 (168 days, 0 WNV)
- Aurora County: April 27 to October 11 (167 days, 5 WNV)
- Lake County: April 27 to October 10 (166 days, 11 WNV)
- Haakon County: April 29 to October 11 (165 days, 1 WNV)
West Nile in Miner County
From 1999 to 2025, CDC ArboNET counted 16 human West Nile cases in Miner County (5 neuroinvasive) across 11 years. The worst was 2003 with 3; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.