Alcoa (TN) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Alcoa.
Climate overview of Alcoa
Alcoa, Tennessee, United States of America, sees big temperature differences between seasons, with August peaking at 31°C (88°F) and January dropping to 8°C (46°F).
The city receives considerable rain/snowfall, with around 1378 mm (54 in) annually. December is the wettest month. It has very warm summers and cold winters. Sunshine peaks in June, when the city sees around 9.7 hours of sunshine per day.
Alcoa Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Alcoa - and find the best time to visit.
Monthly Temperature in Alcoa
Visitors to Alcoa can expect significant temperature changes throughout the year. Typically, average maximum daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 8°C (46°F) in the coolest month, January.
Nights vary from 20°C (68°F) in August to around -2°C (28°F) during the colder months.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Alcoa
Alcoa is known for its substantial rain/snowfall, with annual precipitation reaching 1378 mm (54 in). Alcoa offers a pleasant mix of wetter and slightly drier months. The difference in precipitation between the wettest month December (157 mm (6.2 in)) and the driest month May (90 mm (3.5 in)) is not too significant. For more details, please visit our Alcoa Precipitation page.
The mean monthly precipitation over the year, including rain, hail, and snow
The average number of days each month with precipitation
Sunshine Hours in Alcoa
For those who appreciate different seasons, Alcoa serves as an ideal destination. Expect longer, more sun-filled days in June with an average of 9.7 hours of sunshine daily, and embrace the darker days in December, offering only 4.2 hours of daily sunlight.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Alcoa by Month
The relative humidity is high throughout the year in Alcoa.
The city experiences its highest humidity in July, reaching 76%. In April, the humidity drops to its lowest level at 63%. What does this mean? Read our detailed page on humidity levels for further details.
Relative humidity over the year
Best Time to Visit Alcoa
Monthly ratings reflect general weather comfort, based on daytime temperature and rainfall. Swimming and winter conditions are highlighted separately where relevant.
- Best overall: May and October
- Warmest weather: June, July and August
- Most sunshine: May, June, July and August
- Fewest rainy days: April, September, October and November
- Seasonal pattern: Very warm summers and cold winters
- Coldest conditions: January, with freezing nights around -2°C (28°F).
Frequently asked questions about the climate in Alcoa
What is the best time to visit Alcoa?
May and October typically offer the most optimal weather in Alcoa. In contrast, January, February and December tend to have less optimal conditions. Alcoa has very warm summers and cold winters.
What temperatures can I expect in Alcoa?
Daytime highs range from 8°C (46°F) in January to 31°C (88°F) in August. Nighttime lows range from -2°C (28°F) to 20°C (68°F). Temperatures vary considerably through the year.
How much rain does Alcoa get?
Annual rainfall is around 1378 mm (54 in). December is the wettest month with 157 mm (6.2 in), while May is the driest with 90 mm (3.5 in).
How sunny is Alcoa?
Alcoa receives around 2,618 hours of sunshine per year. June is the sunniest month with 290 hours, while December is the cloudiest with just 125 hours. Overall, Alcoa enjoys abundant sunshine.
Alcoa 3-Day Forecast
Alcoa on the map
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Popular this month
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