Mosquito season in Giles County, TN: when it starts and ends

Mosquito months in Giles County

In a normal year mosquito season in Giles County, TN starts around April 2 and ends around November 1, about 30 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 Giles County, and when

• Start tipping out standing water weekly by March 19.
• Book any yard treatment for early April, ahead of the July peak.
• Repellent can go away after November 1.
• 1 West Nile case since 2016 (last 2025): you should use repellent at dusk June to August, more so if over 60.

Giles County against the rest of TN

Giles County has the 74th longest season of 95 TN counties, at 213 days against 252 in Hamilton County and 186 in Carter County. Its mean temperature is 57.4°F.

• Moore County: April 2 to November 2 (214 days, 0 WNV)
• Cumberland County: April 2 to November 1 (213 days, 1 WNV)
• Hancock County: April 2 to November 1 (213 days, 0 WNV)
• Hawkins County: April 2 to November 1 (213 days, 0 WNV)

West Nile in Giles County

From 1999 to 2025, CDC ArboNET counted 1 human West Nile case in Giles County (1 neuroinvasive) across 1 year. The worst was 2025 with 1; the latest was 2025.

Background: when mosquitoes go away for the winter; how the dates are worked out.