Sweetwater (TN) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Sweetwater.
Climate overview of Sweetwater
Temperatures in Sweetwater, Tennessee, United States of America, vary greatly throughout the year. August is the hottest month at 31°C (88°F), while January is the coldest at 8°C (46°F).
The city has a wet climate, receiving around 1464 mm (58 in) of rain/snowfall per year. December is the wettest month. Sunshine peaks in June, when the city sees around 9.7 hours of sunshine per day.
Sweetwater Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Sweetwater — and find the best time to visit.
Monthly Temperature in Sweetwater
The climate in Sweetwater is known for significant temperature differences throughout the year, making the weather dynamic. On average, daytime temperatures range from a very warm 31°C (88°F) in August to a chilly 8°C (46°F) in January.
Nighttime temperatures range from 20°C (68°F) in August to -2°C (28°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Sweetwater
Sweetwater has a notably wet climate with abundant precipitation, recording 1464 mm (58 in) of rain/snowfall per year. The amount of precipitation varies moderately throughout the year. The wettest month, December, sees around 162 mm (6.4 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, February, still receives a respectable 97 mm (3.8 in) of rainfall. For more details, please visit our Sweetwater 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 Sweetwater
In Sweetwater, summer days are longer and more sunny, with daily sunshine hours peaking at 9.7 hours in June. As the darker season arrives, the brightness of the sun becomes less. December sees a soft sun for only 4.2 hours per average day.
Visit our detailed sunshine hours page for more information.
Monthly hours of sunshine
Daily hours of sunshine
Daily percentage of sunshine
Humidity in Sweetwater by Month
The relative humidity is high throughout the year in Sweetwater.
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 Sweetwater
The wettest months are December, when precipitation is at its highest. Seeking the perfect travel destination for this year? We've created a tool that suggests locations matching your desired weather. Let our weather planner guide your travel decisions.
Frequently asked questions about the climate in Sweetwater
What is the best time to visit Sweetwater?
October typically offers the most optimal weather in Sweetwater. In contrast, January, February and December tend to have less optimal conditions.
What temperatures can I expect in Sweetwater?
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 Sweetwater get?
Annual rainfall is around 1464 mm (58 in). December is the wettest month with 162 mm (6.4 in), while February is the driest with 97 mm (3.8 in).
How sunny is Sweetwater?
Sweetwater 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, Sweetwater enjoys abundant sunshine.
Sweetwater 3-Day Forecast
Sweetwater (TN) 3-Day Forecast
Sweetwater on the map
Sweetwater is highlighted — select any city to see its climate.
Popular this month
Where to go in July — average daytime high across popular destinations.
Bucket list
Need travel inspiration? Check out our bucket list articles and be inspired.
Yosemite National Park is definitely worth a visit
Vast forests, blue lakes, towering sequoias, and majestic waterfalls hint at the beauty of Yosemite National Park—a true natural masterpiece.
The 10 most alternative cities in the United States
Discover the top 10 fun and alternative U.S. cities rich in art, culture, and adventure. From Portland's hippy charm to Sedona's stunning landscapes.
Sedona: Explore Majestic Red Rock Landscapes
A picturesque artists' town surrounded by red rocks and known for its spirituality, vortex energy, and stunning hikes like Cathedral Rock.
10 most idyllic villages to visit in the United States
Discover 10 idyllic villages in the USA, from California to Vermont. Explore their unique charm, rich history, stunning nature, and vibrant arts scenes.