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Contents
- Weather in January
- Weather in February
- Weather in March
- Weather in April
- Weather in May
- Weather in June
- Weather in July
- Weather in August
- Weather in September
- Weather in October
- Weather in November
- Weather in December
- Frequently asked questions
- Average temperature
- Average pressure
- Average wind speed
- Average humidity
- Average rainfall
- Average rainfall days
- Average snowfall
- Average snowfall days
- Average daylight
- Average sunshine
- Average sunshine days
- Average UV index
- Average cloud cover
- Average visibility
Weather in January
January, the same as December, in Charleston, Pennsylvania, is a freezing cold winter month, with temperature in the range of an average low of 17.1°F (-8.3°C) and an average high of 28.6°F (-1.9°C). January, with its high-temperature average of 28.6°F (-1.9°C) and a low-temperature average of 17.1°F (-8.3°C), is the coldest month. Weather in January »
Weather in February
The last month of the winter, February, is a wintry month in Charleston, Pennsylvania, with an average temperature fluctuating between 32°F (0°C) and 18.9°F (-7.3°C). Stepping into February, Charleston records an average high-temperature of a cold 32°F (0°C), almost consistent with January. Weather in February »
Weather in March
March, the first month of the spring in Charleston, is still a cold month, with an average temperature ranging between min 25.3°F (-3.7°C) and max 41.5°F (5.3°C). With the onset of March, Charleston's average high-temperature sees a rise, moving from February's cold 32°F (0°C) to a still icy 41.5°F (5.3°C). Weather in March »
Weather in April
April is a fresh spring month in Charleston, Pennsylvania, with an average temperature ranging between min 35.2°F (1.8°C) and max 53.8°F (12.1°C). The shift into April is characterized by a rise in the average high-temperature, transitioning from March's icy 41.5°F (5.3°C) to a fresh 53.8°F (12.1°C). Weather in April »
Weather in May
The last month of the spring, May, is a refreshing month in Charleston, Pennsylvania, with temperature in the range of an average low of 46°F (7.8°C) and an average high of 66.9°F (19.4°C). May witnesses an increase in the average high-temperature, moving from a fresh 53.8°F (12.1°C) in April to a refreshing 66.9°F (19.4°C). Weather in May »
Weather in June
The first month of the summer, June, is a moderately hot month in Charleston, Pennsylvania, with an average temperature ranging between max 74.3°F (23.5°C) and min 52.3°F (11.3°C). Charleston's June weather indicates a minor ascent in high-temperatures, adjusting from a refreshing 66.9°F (19.4°C) in May to a warm 74.3°F (23.5°C). Weather in June »
Weather in July
July, like June, in Charleston, Pennsylvania, is another warm summer month, with an average temperature fluctuating between 79.3°F (26.3°C) and 57.2°F (14°C). July is the warmest month, with the temperature often reaching an average high of 79.3°F (26.3°C) and an average low of 57.2°F (14°C). Weather in July »
Weather in August
The last month of the summer, August, is also a moderately hot month in Charleston, Pennsylvania, with temperature in the range of an average low of 55°F (12.8°C) and an average high of 77°F (25°C). Charleston indicates an average high-temperature of a still warm 77°F (25°C) in August, showing minor variation from July's 79.3°F (26.3°C). Weather in August »
Weather in September
September, the first month of the autumn in Charleston, is still a pleasant month, with an average temperature fluctuating between 49.8°F (9.9°C) and 70°F (21.1°C). The arrival of September correlates with a minor temperature reduction, down from August's warm 77°F (25°C) to a pleasant 70°F (21.1°C). Weather in September »
Weather in October
October, like September, is another refreshing autumn month in Charleston, Pennsylvania, with an average temperature ranging between min 41.4°F (5.2°C) and max 57.6°F (14.2°C). Setting in of October comes with a decrease in the average high-temperature, moving from a pleasant 70°F (21.1°C) in September to a moderate 57.6°F (14.2°C). Weather in October »
Weather in November
November, the last month of the autumn in Charleston, is another chilly month, with an average temperature varying between 30.6°F (-0.8°C) and 44.1°F (6.7°C). Charleston's progression into November includes a drop in the average high-temperature, from a refreshing 57.6°F (14.2°C) in October to a frosty 44.1°F (6.7°C). Weather in November »
Weather in December
The first month of the winter, December, is still a cold month in Charleston, Pennsylvania, with an average temperature ranging between min 25°F (-3.9°C) and max 34.7°F (1.5°C). The shift from November to December corresponds with a decrease in the average high-temperature, down to a cold 34.7°F (1.5°C) from a frosty 44.1°F (6.7°C). Weather in December »
Updated: Aug 30, 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
What are the coldest months?
With average high temperatures of 28.6°F (-1.9°C) and lows of 17.1°F (-8.3°C), January is the coldest month.
How much does it rain?
Throughout the year, there are 175.2 rainfall days, and 30.39" (772mm) of precipitation is accumulated.
When does it snow in Charleston?
January through May, October through December are months with snowfall.
How much does it snow?
In Charleston, during the entire year, snow falls for 80.1 days and aggregates up to 36.85" (936mm) of snow.
When is the lowest UV index?
The months with the lowest UV index are January and December, with an average maximum UV index of 1.
What is the most humid month?
The most humid month is February, with an average relative humidity of 86%.
What is the snowiest month in Charleston?
February is the month with the most snowfall. Snow falls for 17.3 days and accumulates 9.06" (230mm) of snow.
When is Daylight Saving Time (DST)?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts, 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.
What is the wettest month?
The month with the most rainfall is April, when the rain falls for 17.4 days and typically aggregates up to 3.35" (85mm) of precipitation.
What is the month with the highest UV index?
The months with the highest UV index are May through August, with an average maximum UV index of 5.
What is the least humid month?
June is the least humid month, with an average relative humidity of 78%.
When it does not snow?
In Charleston, snow does not fall in June through September.
When are the longest days?
With an average of 15h and 12min of daylight, June has the longest days of the year.
What are the warmest months?
Charleston registers the average highest temperatures during July, with peaks of 79.3°F (26.3°C) and lows of 57.2°F (14°C).
What month has the most sunshine?
The month with the most sunshine in Charleston is July, with an average of 10h of sunshine.
What is the driest month?
The month with the least rainfall in Charleston is November, when the rain falls for 12.5 days and typically collects 1.97" (50mm) of precipitation.
What is the month with the shortest days?
The month with the shortest days is December, with an average of 9h and 12min of daylight.
What is the month with the least sunshine in Charleston?
The month with the least sunshine is December, with an average of 3.1h of sunshine.
Average temperature
Charleston, PA
The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (28.6°F).
The month with the highest average low temperature is July (57.2°F).
The coldest month (with the lowest average low temperature) is January (17.1°F).
Average pressure
Charleston, PA
- Average pressure in January:
30.08"Hg - Average pressure in February:
30.06"Hg - Average pressure in March:
30.08"Hg - Average pressure in April:
29.98"Hg - Average pressure in May:
30"Hg - Average pressure in June:
29.94"Hg
- Average pressure in July:
29.97"Hg - Average pressure in August:
30"Hg - Average pressure in September:
30.07"Hg - Average pressure in October:
30.03"Hg - Average pressure in November:
30.12"Hg - Average pressure in December:
30.09"Hg
The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).
Average wind speed
Charleston, PA
- Average wind speed in January:
8.8mph - Average wind speed in February:
8.5mph - Average wind speed in March:
8.5mph - Average wind speed in April:
8.5mph - Average wind speed in May:
7.1mph - Average wind speed in June:
6.6mph
- Average wind speed in July:
5.7mph - Average wind speed in August:
5.5mph - Average wind speed in September:
6mph - Average wind speed in October:
7.3mph - Average wind speed in November:
7.8mph - Average wind speed in December:
8.3mph
The windiest month (with the highest average wind speed) is January (8.8mph).
The calmest month (with the lowest average wind speed) is August (5.5mph).
Average humidity
Charleston, PA
The month with the highest relative humidity is February (86%).
The month with the lowest relative humidity is June (78%).
Average rainfall
Charleston, PA
- Average rainfall in January:
2.13" - Average rainfall in February:
2.24" - Average rainfall in March:
2.24" - Average rainfall in April:
3.35" - Average rainfall in May:
2.72" - Average rainfall in June:
2.76"
- Average rainfall in July:
2.91" - Average rainfall in August:
2.4" - Average rainfall in September:
2.17" - Average rainfall in October:
3.03" - Average rainfall in November:
1.97" - Average rainfall in December:
2.48"
The wettest month (with the highest rainfall) is April (3.35").
The driest month (with the least rainfall) is November (1.97").
Average rainfall days
Charleston, PA
- Average rainfall days in January:
9.7 days - Average rainfall days in February:
8.5 days - Average rainfall days in March:
12.3 days - Average rainfall days in April:
17.4 days - Average rainfall days in May:
19 days - Average rainfall days in June:
17.7 days
- Average rainfall days in July:
19.4 days - Average rainfall days in August:
17.2 days - Average rainfall days in September:
13.5 days - Average rainfall days in October:
15.9 days - Average rainfall days in November:
12.5 days - Average rainfall days in December:
12.1 days
The month with the highest number of rainy days is July (19.4 days).
The month with the least rainy days is February (8.5 days).
Average snowfall
Charleston, PA
- Average snowfall in January:
7.48" - Average snowfall in February:
9.06" - Average snowfall in March:
4.96" - Average snowfall in April:
2.44" - Average snowfall in May:
0.35" - Average snowfall in June:
0"
The month with the highest snowfall is February (9.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days
Charleston, PA
- Average snowfall days in January:
18.7 days - Average snowfall days in February:
17.3 days - Average snowfall days in March:
12.5 days - Average snowfall days in April:
4.8 days - Average snowfall days in May:
0.6 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:
1.4 days - Average snowfall days in November:
8.7 days - Average snowfall days in December:
16.1 days
The month with the highest number of snowfall days is January (18.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight / Average sunshine
Charleston, PA
- Average daylight in January:
9h and 4min - Average daylight in February:
10h and 4min - Average daylight in March:
12h and 0min - Average daylight in April:
13h and 2min - Average daylight in May:
14h and 4min - Average daylight in June:
15h and 1min
- Average daylight in July:
14h and 5min - Average daylight in August:
13h and 5min - Average daylight in September:
12h and 3min - Average daylight in October:
11h and 1min - Average daylight in November:
9h and 5min - Average daylight in December:
9h and 1min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).
- Average sunshine in January:
3h and 1min - Average sunshine in February:
3h and 1min - Average sunshine in March:
5h and 2min - Average sunshine in April:
7h and 1min - Average sunshine in May:
8h and 2min - Average sunshine in June:
9h and 1min
- Average sunshine in July:
10h and 0min - Average sunshine in August:
9h and 4min - Average sunshine in September:
8h and 2min - Average sunshine in October:
4h and 5min - Average sunshine in November:
4h and 4min - Average sunshine in December:
3h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is December (Average sunshine: 3h and 6min).
Average sunshine days
Charleston, PA
- Average sunshine days in January:
8.1 days - Average sunshine days in February:
7.4 days - Average sunshine days in March:
9 days - Average sunshine days in April:
9.5 days - Average sunshine days in May:
9.8 days - Average sunshine days in June:
9.6 days
- Average sunshine days in July:
9.8 days - Average sunshine days in August:
11.3 days - Average sunshine days in September:
14 days - Average sunshine days in October:
11.7 days - Average sunshine days in November:
12.6 days - Average sunshine days in December:
7.8 days
The month with the most sunshine days is September (14 days).
The month with the least sunshine days is February (7.4 days).
Average UV index
Charleston, PA
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover
Charleston, PA
The month with the most cloud cover is December (Cloud cover 69).
The months with the least cloud cover are July and August (Cloud cover 39).
Average visibility
Charleston, PA
The months with the highest visibility are January, March, April, May, June, July, August, September, October, November and December (5mi).
The month with the lowest visibility is February (4mi).
Charleston, Pennsylvania, USA
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