Harriman (TN) Weather & Climate: Best Time to Visit
Average temperatures, rainfall, sunshine and the best time to visit Harriman.
Climate overview of Harriman
Harriman, Tennessee, United States of America, experiences significant temperature variation throughout the year. Summers bring daytime highs of 31°C (88°F) in August, while winters cool to 8°C (46°F) in January.
The city has a wet climate, receiving around 1451 mm (57 in) of rain/snowfall per year. July is the wettest month. The most sunshine falls in June, with an average of 9.7 hours of daily sunshine.
Harriman Weather by Month
Pick a month to see the average temperature, rainfall and sunshine in Harriman — and find the best time to visit.
Monthly Temperature in Harriman
Depending on the time of the year, temperatures range from very warm to chilly in Harriman. 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 19°C (66°F) in August to -3°C (27°F) in January.
Check out our detailed temperature page for more information.
Temperature ranges by month
Rainfall in Harriman
Harriman has a relatively rain/snowy climate with high precipitation levels, averaging 1451 mm (57 in) of rain/snowfall annually. The amount of precipitation varies moderately throughout the year. The wettest month, July, sees around 176 mm (6.9 in) of rainfall, perfect for those who enjoy a bit of rain now and then. The driest month, October, still receives a respectable 92 mm (3.6 in) of rainfall. For more details, please visit our Harriman 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 Harriman
In Harriman, 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 Harriman by Month
The relative humidity is high throughout the year in Harriman.
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 Harriman
Rainfall during this time ranges from 92 mm (3.6 in) in October to 136 mm (5.4 in) in April. This means you can expect a mix of sunny days and occasional showers.
The rainy season falls during July, bringing heavy precipitation. Need help choosing your next travel destination? We offer a specialized tool that matches you with locations based on your weather preferences. Explore destinations that suit your climate preferences.
Frequently asked questions about the climate in Harriman
What is the best time to visit Harriman?
October typically offers the most optimal weather in Harriman. In contrast, January, February and December tend to have less optimal conditions.
What temperatures can I expect in Harriman?
Daytime highs range from 8°C (46°F) in January to 31°C (88°F) in August. Nighttime lows range from -3°C (27°F) to 19°C (66°F). Temperatures vary considerably through the year.
How much rain does Harriman get?
Annual rainfall is around 1451 mm (57 in). July is the wettest month with 176 mm (6.9 in), while October is the driest with 92 mm (3.6 in).
How sunny is Harriman?
Harriman 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, Harriman enjoys abundant sunshine.
Harriman 3-Day Forecast
Harriman (TN) 3-Day Forecast
Harriman on the map
Harriman is highlighted — select any city to see its climate.
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