Climate and monthly weather forecastCharleston, TN
Climate and monthly weather forecast
Weather in January
January, the same as December, in Charleston, Tennessee, is a frosty winter month, with an average temperature varying between 30.9°F (-0.6°C) and 46.4°F (8°C). In Charleston, Tennessee, the month of January registers the lowest temperatures, averaging 46.4°F (8°C) at the peak and 30.9°F (-0.6°C) at the lowest. Weather in January »Weather in February
The last month of the winter, February, is a fresh month in Charleston, Tennessee, with an average temperature fluctuating between 51.4°F (10.8°C) and 35.2°F (1.8°C). As February takes its course, Charleston's average high-temperature registers at a cool 51.4°F (10.8°C), closely aligning with the preceding month. Weather in February »Weather in March
March, the first month of the spring in Charleston, is a refreshing month, with temperature in the range of an average low of 41.5°F (5.3°C) and an average high of 59.2°F (15.1°C). Charleston's transition into March sees a mild rise in the average high-temperature, edging from a cool 51.4°F (10.8°C) in February to a refreshing 59.2°F (15.1°C). Weather in March »Weather in April
April in Charleston, Tennessee, is an agreeable spring month, with an average temperature varying between 69.4°F (20.8°C) and 49.5°F (9.7°C). The shift into April is marked by a rise in the average high-temperature, moving from March's mild 59.2°F (15.1°C) to a pleasant 69.4°F (20.8°C). Weather in April »Weather in May
May, the last month of the spring in Charleston, is a warm month, with temperature in the range of an average high of 77.9°F (25.5°C) and an average low of 56.8°F (13.8°C). The beginning of May marks a minor shift in the average high-temperature, moving from April's agreeable 69.4°F (20.8°C) to a warm 77.9°F (25.5°C). Weather in May »Weather in June
The first month of the summer, June, is also a moderately hot month in Charleston, Tennessee, with an average temperature fluctuating between 85.5°F (29.7°C) and 63.3°F (17.4°C). June brings a slight rise in Charleston's average high-temperature, moving from a warm 77.9°F (25.5°C) in May to a still moderately hot 85.5°F (29.7°C). Weather in June »Weather in July
July is a tropical summer month in Charleston, Tennessee, with an average temperature varying between 87.8°F (31°C) and 66.4°F (19.1°C). With an average high-temperature of 87.8°F (31°C) and an average low-temperature of 66.4°F (19.1°C), July is the warmest month. For July, the heat index is evaluated at a sweltering 102.2°F (39°C). Weather in July »Weather in August
August, the last month of the summer in Charleston, is also a hot month, with an average temperature varying between 87.4°F (30.8°C) and 65.8°F (18.8°C). Charleston records an average high-temperature of a still tropical 87.4°F (30.8°C) in August, maintaining a close correlation with July's 87.8°F (31°C). Weather in August »Weather in September
September, the first month of the autumn in Charleston, is still a warm month, with an average temperature varying between 81.9°F (27.7°C) and 61°F (16.1°C). A mild shift in the average high-temperature occurs in September, reducing from a hot 87.4°F (30.8°C) in August to a moderately hot 81.9°F (27.7°C). Weather in September »Weather in October
October, the same as September, in Charleston, Tennessee, is another pleasant autumn month, with an average temperature ranging between max 70.7°F (21.5°C) and min 49.5°F (9.7°C). As September transitions into October, Charleston sees a drop in the average high-temperature, transitioning from a warm 81.9°F (27.7°C) to a pleasant 70.7°F (21.5°C). Weather in October »Weather in November
The last month of the autumn, November, is also a moderate month in Charleston, Tennessee, with an average temperature ranging between min 40.1°F (4.5°C) and max 58.1°F (14.5°C). With November's onset, the average high-temperature recedes from October's pleasant 70.7°F (21.5°C) to a moderate 58.1°F (14.5°C). Weather in November »Weather in December
December, the first month of the winter in Charleston, is also a fresh month, with temperature in the range of an average low of 36.1°F (2.3°C) and an average high of 50.5°F (10.3°C). The arrival of December is marked by a minor reduction in average high-temperature, sliding from a refreshing 58.1°F (14.5°C) in November to a cool 50.5°F (10.3°C). Weather in December »Updated: Feb 14, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Temperature readings in Charleston, Tennessee, reach their annual highs in January, averaging 46.4°F (8°C) and a minimum average of 30.9°F (-0.6°C).
In Charleston, Tennessee, during the entire year, the rain falls for 148 days and collects up to 23.9" (607mm) of precipitation.
January through March, November and December are months with snowfall.
Throughout the year, in Charleston, Tennessee, there are 5.2 snowfall days, and 1.77" (45mm) of snow is accumulated.
January, February and December, with an average maximum UV index of 2, are months with the lowest UV index.
February is the month with the most snowfall in Charleston. Snow falls for 1.7 days and accumulates 0.75" (19mm) of snow.
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Charleston, Tennessee, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 3. 2024, at 2:00 am, and the time zone reverts from EDT to EST.
In Charleston, Tennessee, snow does not fall in April through October.
May through August, with an average maximum UV index of 6, are months with the highest UV index in Charleston.
June through November, with an average relative humidity of 75%, are the least humid months in Charleston, Tennessee.
The month with the longest days is June, with an average of 14h and 30min of daylight.
The month with the most sunshine in Charleston is June, with an average of 10.6h of sunshine.
With an average high-temperature of 87.8°F (31°C) and an average low-temperature of 66.4°F (19.1°C), July is the warmest month.
July is the month with the most rainfall in Charleston, Tennessee. Rain falls for 17 days and accumulates 2.64" (67mm) of precipitation.
September is the month with the least rainfall in Charleston, Tennessee. Rain falls for 11.1 days and accumulates 1.3" (33mm) of precipitation.
The most humid month is December, with an average relative humidity of 80%.
December has the shortest days of the year, with an average of 9h and 48min of daylight.
With an average of 5.1h of sunshine, December has the least sunshine of the year in Charleston.
Average temperature
Charleston, TN
The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (46.4°F).
The month with the highest average low temperature is July (66.4°F).
The coldest month (with the lowest average low temperature) is January (30.9°F).
Average pressure
Charleston, TN
- Average pressure in January:
30.16"Hg - Average pressure in February:
30.12"Hg - Average pressure in March:
30.1"Hg - Average pressure in April:
30.01"Hg - Average pressure in May:
30.02"Hg - Average pressure in June:
29.98"Hg
- Average pressure in July:
30.01"Hg - Average pressure in August:
30.01"Hg - Average pressure in September:
30.03"Hg - Average pressure in October:
30.06"Hg - Average pressure in November:
30.16"Hg - Average pressure in December:
30.15"Hg
The months with the highest atmospheric pressure are January and November (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.98"Hg).
Average wind speed
Charleston, TN
- Average wind speed in January:
6.3mph - Average wind speed in February:
6.6mph - Average wind speed in March:
6.5mph - Average wind speed in April:
6.5mph - Average wind speed in May:
5.1mph - Average wind speed in June:
4.3mph
- Average wind speed in July:
3.9mph - Average wind speed in August:
3.8mph - Average wind speed in September:
4.1mph - Average wind speed in October:
5.2mph - Average wind speed in November:
5.6mph - Average wind speed in December:
6mph
The windiest month (with the highest average wind speed) is February (6.6mph).
The calmest month (with the lowest average wind speed) is August (3.8mph).
Average humidity
Charleston, TN
The month with the highest relative humidity is December (80%).
The months with the lowest relative humidity are June, July, August, September, October and November (75%).
Average rainfall
Charleston, TN
- Average rainfall in January:
1.69" - Average rainfall in February:
2.13" - Average rainfall in March:
2.17" - Average rainfall in April:
1.93" - Average rainfall in May:
2.05" - Average rainfall in June:
2.13"
- Average rainfall in July:
2.64" - Average rainfall in August:
2.44" - Average rainfall in September:
1.3" - Average rainfall in October:
1.69" - Average rainfall in November:
1.38" - Average rainfall in December:
2.36"
The wettest month (with the highest rainfall) is July (2.64").
The driest month (with the least rainfall) is September (1.3").
Average rainfall days
Charleston, TN
- Average rainfall days in January:
10.7 days - Average rainfall days in February:
11.3 days - Average rainfall days in March:
14 days - Average rainfall days in April:
12.4 days - Average rainfall days in May:
14.5 days - Average rainfall days in June:
15 days
- Average rainfall days in July:
17 days - Average rainfall days in August:
14.8 days - Average rainfall days in September:
11.1 days - Average rainfall days in October:
8.5 days - Average rainfall days in November:
7.3 days - Average rainfall days in December:
11.4 days
The month with the highest number of rainy days is July (17 days).
The month with the least rainy days is November (7.3 days).
Average snowfall
Charleston, TN
The month with the highest snowfall is February (0.75").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days
Charleston, TN
- Average snowfall days in January:
1.4 days - Average snowfall days in February:
1.7 days - Average snowfall days in March:
1 days - Average snowfall days in April:
0.1 days - Average snowfall days in May:
0 days - Average snowfall days in June:
0 days
- Average snowfall days in July:
0 days - Average snowfall days in August:
0 days - Average snowfall days in September:
0 days - Average snowfall days in October:
0.1 days - Average snowfall days in November:
0.2 days - Average snowfall days in December:
0.7 days
The month with the highest number of snowfall days is February (1.7 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight / Average sunshine
Charleston, TN
- Average daylight in January:
10h and 6min - Average daylight in February:
10h and 54min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 6min - Average daylight in May:
14h and 0min - Average daylight in June:
14h and 30min
- Average daylight in July:
14h and 18min - Average daylight in August:
13h and 24min - Average daylight in September:
12h and 24min - Average daylight in October:
11h and 18min - Average daylight in November:
10h and 18min - Average daylight in December:
9h and 48min
The month with the longest days is June (Average daylight: 14h and 30min).
The month with the shortest days is December (Average daylight: 9h and 48min).
- Average sunshine in January:
5h and 24min - Average sunshine in February:
6h and 12min - Average sunshine in March:
6h and 42min - Average sunshine in April:
8h and 24min - Average sunshine in May:
9h and 54min - Average sunshine in June:
10h and 36min
- Average sunshine in July:
10h and 30min - Average sunshine in August:
9h and 36min - Average sunshine in September:
8h and 36min - Average sunshine in October:
7h and 18min - Average sunshine in November:
5h and 48min - Average sunshine in December:
5h and 6min
The month with the most sunshine is June (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 5h and 6min).
Average sunshine days
Charleston, TN
- Average sunshine days in January:
19.1 days - Average sunshine days in February:
14.8 days - Average sunshine days in March:
14.5 days - Average sunshine days in April:
15.5 days - Average sunshine days in May:
14.1 days - Average sunshine days in June:
12 days
- Average sunshine days in July:
11.6 days - Average sunshine days in August:
12.9 days - Average sunshine days in September:
16.4 days - Average sunshine days in October:
21.2 days - Average sunshine days in November:
21.2 days - Average sunshine days in December:
17.7 days
The months with the most sunshine days are October and November (21.2 days).
The month with the least sunshine days is July (11.6 days).
Average UV index
Charleston, TN
The months with the highest UV index are May, June, July and August (UV index 6).
The months with the lowest UV index are January, February and December (UV index 2).
Average cloud cover
Charleston, TN
The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is June (Cloud cover 29).
Average visibility
Charleston, TN
The months with the highest visibility are February, March, April, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, May and December (5mi).
