Mosquito season in Davidson County, TN: when it starts and ends
Mosquito months in Davidson County
In a normal year mosquito season in Davidson County, TN starts around March 20 and ends around November 9, about 33 weeks.
- Jan
- Feb
- Mar
- Apr
- May
- Jun
- Jul
- Aug
- Sep
- Oct
- Nov
- Dec
What to do in Davidson County, and when
- Start tipping out standing water weekly by March 6.
- Book any yard treatment for mid March, ahead of the July peak.
- Repellent can go away after November 9.
- 11 West Nile cases since 2016: you should wear EPA-registered repellent at dusk June to September, and check TN spray notices.
Davidson County against the rest of TN
Davidson County has the 16th longest season of 95 TN counties, at 234 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 59.6°F.
- Blount County: March 19 to November 10 (236 days, 0 WNV)
- Roane County: March 20 to November 10 (235 days, 0 WNV)
- Decatur County: March 20 to November 8 (233 days, 0 WNV)
- Carroll County: March 21 to November 9 (233 days, 1 WNV)
West Nile in Davidson County
From 1999 to 2025, CDC ArboNET counted 28 human West Nile cases in Davidson County (18 neuroinvasive) across 14 years. The worst was 2017 with 5; the latest was 2025.
More: how the dates are worked out · reading the West Nile counts.