Mosquito season in Faulk County, SD: when it starts and ends
Mosquito months in Faulk County
In a normal year mosquito season in Faulk County, SD starts around May 1 and ends around October 6, about 23 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Faulk 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 6.
- 14 West Nile cases since 2016: you should wear EPA-registered repellent at dusk July to July, and check SD spray notices.
Faulk County against the rest of SD
Faulk County has the 51st longest season of 66 SD counties, at 158 days against 179 in Yankton County and 139 in Lawrence County. Its mean temperature is 44°F.
- Brookings County: May 1 to October 6 (158 days, 27 WNV)
- Campbell County: May 1 to October 6 (158 days, 3 WNV)
- Stanley County: May 1 to October 5 (157 days, 4 WNV)
- Clark County: May 2 to October 6 (157 days, 11 WNV)
West Nile in Faulk County
From 1999 to 2025, CDC ArboNET counted 32 human West Nile cases in Faulk County (6 neuroinvasive) across 13 years. The worst was 2003 with 9; the latest was 2023.
See how the dates are worked out, and reading the West Nile counts.