Mosquito season in Daviess County, KY: when it starts and ends
Mosquito months in Daviess County
In a normal year mosquito season in Daviess County, KY starts around March 24 and ends around November 6, about 32 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Daviess County, and when
- Start tipping out standing water weekly by March 10.
- Book any yard treatment for late March, ahead of the July peak.
- Repellent can go away after November 6.
- 6 West Nile cases since 2016 (last 2025): you should use repellent at dusk June to September, more so if over 60.
Daviess County against the rest of KY
Daviess County has the 19th longest season of 120 KY counties, at 226 days against 249 in Lyon County and 180 in Shelby County. Its mean temperature is 57.1°F.
- Metcalfe County: March 25 to November 8 (228 days, 1 WNV)
- Simpson County: March 26 to November 9 (228 days, 0 WNV)
- Todd County: March 25 to November 6 (226 days, 0 WNV)
- Union County: March 26 to November 5 (224 days, 0 WNV)
West Nile in Daviess County
From 1999 to 2025, CDC ArboNET counted 11 human West Nile cases in Daviess County (8 neuroinvasive) across 6 years. The worst was 2025 with 3; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.