Knoxville Weather in September

September in Knoxville sees daytime temperatures around 28°C (82°F) and lows of 16°C (61°F) at night. With around 120 mm (4.7 in) of rainfall expected, it's worth packing a rain jacket.

Rainfall in Knoxville in September

The climate data from previous years indicates about 9 days of rain, averaging 120 mm (4.7 in) for the month. The rain this month tends to fall in heavier spells rather than light drizzle. When it rains, showers can be significant.

Temperature in Knoxville in September

September in Knoxville sees highs of 28°C (82°F) and lows of 16°C (61°F) overnight. The days can feel warmer than the evenings, so packing for both parts of the day is a good idea. Nights drop to around 16°C (61°F), which is noticeably cooler than the daytime. A light jacket for the evening is a sensible addition, and the cool nights tend to make sleeping comfortable.

Sunshine in Knoxville in September

The city usually sees around 233 hours of sunlight, indicating many sunny days , a great month for sightseeing.

For Knoxville itself, May and October generally stand out with the best circumstances. If you're seeking pleasant, dry and sunny weather somewhere else in the world, our weather planner can help you explore other options.