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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, like December, is another subzero cold winter month in Charleston, Pennsylvania, with an average temperature ranging between min 17.1°F (-8.3°C) and max 28.6°F (-1.9°C). In Charleston, the lowest average temperatures are observed in January, with a high of 28.6°F (-1.9°C) and a low of 17.1°F (-8.3°C). Weather in January »
Weather in February
February, the last month of the winter in Charleston, is a wintry month, with an average temperature fluctuating between 18.9°F (-7.3°C) and 32°F (0°C). The start of February sees the average high-temperature at a wintry 32°F (0°C), showing little difference from January's 28.6°F (-1.9°C). Weather in February »
Weather in March
The first month of the spring, March, is also an icy month in Charleston, Pennsylvania, with temperature in the range of an average low of 25.3°F (-3.7°C) and an average high of 41.5°F (5.3°C). The arrival of March signals an increase in the average high-temperature, moving from 32°F (0°C) in February to a still cold 41.5°F (5.3°C). Weather in March »
Weather in April
April is a cool spring month in Charleston, Pennsylvania, with an average temperature varying between 35.2°F (1.8°C) and 53.8°F (12.1°C). Charleston's weather in April presents a rise in the average high-temperature, moving from a cold 41.5°F (5.3°C) in March to a fresh 53.8°F (12.1°C). Weather in April »
Weather in May
May, the last month of the spring in Charleston, is a comfortable month, with an average temperature fluctuating between 46°F (7.8°C) and 66.9°F (19.4°C). As April gives way to May, the average high-temperature displays an increase, moving from a fresh 53.8°F (12.1°C) to a comfortable 66.9°F (19.4°C). Weather in May »
Weather in June
June, the first month of the summer in Charleston, is a moderately hot month, with an average temperature varying between 74.3°F (23.5°C) and 52.3°F (11.3°C). June's arrival signals a modest temperature shift, moving from a comfortable 66.9°F (19.4°C) in May to a moderately hot 74.3°F (23.5°C). Weather in June »
Weather in July
July, the same as June, is another warm summer month in Charleston, Pennsylvania, with an average temperature fluctuating between 79.3°F (26.3°C) and 57.2°F (14°C). July, having an average high-temperature of 79.3°F (26.3°C) and an average low-temperature of 57.2°F (14°C), is the warmest month. Weather in July »
Weather in August
August, the last month of the summer in Charleston, is another warm month, with an average temperature ranging between max 77°F (25°C) and min 55°F (12.8°C). The shift from July to August is characterized by an average high-temperature of a still warm 77°F (25°C), not significantly different from the 79.3°F (26.3°C) of July. Weather in August »
Weather in September
The first month of the autumn, September, is also an agreeable month in Charleston, Pennsylvania, with an average temperature ranging between min 49.8°F (9.9°C) and max 70°F (21.1°C). The move into September indicates a slight reduction in the average high-temperature, down from August's warm 77°F (25°C) to an agreeable 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 varying between 57.6°F (14.2°C) and 41.4°F (5.2°C). Onset of October witnesses a reduction in the average high-temperature, falling 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 temperature in the range of an average high of 44.1°F (6.7°C) and an average low of 30.6°F (-0.8°C). A decrease in the average high-temperature is observed during November, shifting from a moderate 57.6°F (14.2°C) in October to a chilly 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 fluctuating between 34.7°F (1.5°C) and 25°F (-3.9°C). Start of December brings a shift in the average high-temperature, falling from November's chilly 44.1°F (6.7°C) to a cold 34.7°F (1.5°C). Weather in December »
[Resources]Frequently asked questions
What is the coldest time of year in Charleston?
January stands out as Charleston's coldest month, with temperatures ranging between an average high of 28.6°F (-1.9°C) and a low of 17.1°F (-8.3°C).
How much does it rain in Charleston?
In Charleston, Pennsylvania, during the entire year, the rain falls for 175.2 days and collects up to 30.39" (772mm) of precipitation.
When does it snow in Charleston?
January through May, October through December are months with snowfall.
How much does it snow in Charleston?
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 in Charleston?
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 in Charleston?
February is the most humid month, with an average relative humidity of 86%.
When does it snow the most in Charleston?
The month with the most snowfall is February, when snow falls for 17.3 days and typically aggregates up to 9.06" (230mm) of snow.
When is Daylight Saving Time (DST) in Charleston?
On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Charleston, 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 rainiest month in Charleston?
April is the month with the most rainfall in Charleston. Rain falls for 17.4 days and accumulates 3.35" (85mm) of precipitation.
What is the month with the highest UV index in Charleston?
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 in Charleston?
The least humid month is June, with an average relative humidity of 78%.
When it does not snow in Charleston?
In Charleston, snow does not fall in June through September.
When are the longest days in Charleston?
June has the longest days of the year in Charleston, with an average of 15h and 12min of daylight.
What is the warmest month in Charleston?
July is the warmest month of the year in Charleston, Pennsylvania, registering average temperatures as high as 79.3°F (26.3°C) and as low as 57.2°F (14°C).
What month has the most sunshine in Charleston?
July has the most sunshine of the year in Charleston, Pennsylvania, with an average of 10h of sunshine.
What is the driest month in Charleston?
The month with the least rainfall in Charleston, Pennsylvania, 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 in Charleston?
December has the shortest days of the year in Charleston, Pennsylvania, 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 in Charleston, Pennsylvania, 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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