Climate and monthly weather forecast
Glen Carbon, PA

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Weather in January

January, the same as December, is a wintry winter month in Glen Carbon, Pennsylvania, with an average temperature ranging between min 20.1°F (-6.6°C) and max 32.7°F (0.4°C). With an average high-temperature of 32.7°F (0.4°C) and an average low-temperature of 20.1°F (-6.6°C), January is the coldest month. Weather in January »

Weather in February

February, the last month of the winter in Glen Carbon, is also an icy month, with temperature in the range of an average low of 22.3°F (-5.4°C) and an average high of 36.5°F (2.5°C). With the arrival of February, Glen Carbon's average high-temperature registers at a still cold 36.5°F (2.5°C), indicating a subtle variation from the previous month. Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Glen Carbon, Pennsylvania, with temperature in the range of an average high of 45.1°F (7.3°C) and an average low of 29.7°F (-1.3°C). March introduces a minor temperature shift, with average high-temperatures adjusting from February's icy 36.5°F (2.5°C) to a frosty 45.1°F (7.3°C). Weather in March »

Weather in April

April is a moderate spring month in Glen Carbon, Pennsylvania, with an average temperature ranging between min 39.7°F (4.3°C) and max 57.4°F (14.1°C). The arrival of April brings an increase in high-temperatures, moving from a frosty 45.1°F (7.3°C) in March to a refreshing 57.4°F (14.1°C). Weather in April »

Weather in May

May, the last month of the spring in Glen Carbon, is a pleasant month, with temperature in the range of an average low of 49.8°F (9.9°C) and an average high of 68.4°F (20.2°C). The start of May brings a rise in the average high-temperature, moving from a moderate 57.4°F (14.1°C) in April to a pleasant 68.4°F (20.2°C). Weather in May »

Weather in June

June, the first month of the summer in Glen Carbon, is a moderately hot month, with temperature in the range of an average low of 56.8°F (13.8°C) and an average high of 76.1°F (24.5°C). The commencement of June sees a minor shift in the average high-temperature, moving from an agreeable 68.4°F (20.2°C) in May to a moderately hot 76.1°F (24.5°C). Weather in June »

Weather in July

July, the same as June, is another warm summer month in Glen Carbon, Pennsylvania, with temperature in the range of an average low of 61.7°F (16.5°C) and an average high of 81.3°F (27.4°C). Glen Carbon's temperatures tend to reach their peak averages in July, with a high of 81.3°F (27.4°C) and a low of 61.7°F (16.5°C). During July, the heat index is calculated to be a tropical 87.8°F (31°C). Weather in July »

Weather in August

The last month of the summer, August, is also a moderately hot month in Glen Carbon, Pennsylvania, with an average temperature fluctuating between 60.1°F (15.6°C) and 79.2°F (26.2°C). During August, the average high-temperature is a still moderately hot 79.2°F (26.2°C), maintaining a close resemblance to that of the preceding month. Weather in August »

Weather in September

The first month of the autumn, September, is still a pleasant month in Glen Carbon, Pennsylvania, with an average temperature fluctuating between 73°F (22.8°C) and 53.8°F (12.1°C). In September, the average high-temperature marginally decreases from a moderately hot 79.2°F (26.2°C) in August to an agreeable 73°F (22.8°C). Weather in September »

Weather in October

October, the same as September, in Glen Carbon, Pennsylvania, is another mild autumn month, with an average temperature fluctuating between 60.6°F (15.9°C) and 44.6°F (7°C). The transition into October involves a decrease in the average high-temperature, falling from an agreeable 73°F (22.8°C) in September to a refreshing 60.6°F (15.9°C). Weather in October »

Weather in November

November, the last month of the autumn in Glen Carbon, is also a frosty month, with temperature in the range of an average high of 47.8°F (8.8°C) and an average low of 34°F (1.1°C). The shift from October to November corresponds with a decrease in the average high-temperature, down to a chilly 47.8°F (8.8°C) from a refreshing 60.6°F (15.9°C). Weather in November »

Weather in December

December, the first month of the winter in Glen Carbon, is also a wintry month, with an average temperature fluctuating between 38.8°F (3.8°C) and 27.9°F (-2.3°C). The arrival of December indicates a decrease in the average high-temperature, moving from a chilly 47.8°F (8.8°C) in November to a cold 38.8°F (3.8°C). Weather in December »
Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest in Glen Carbon?

Glen Carbon experiences its average lowest temperatures in January, reaching a peak of 32.7°F (0.4°C) and a minimum of 20.1°F (-6.6°C).

How many days does it rain in Glen Carbon?

In Glen Carbon, during the entire year, the rain falls for 146 days and collects up to 26.42" (671mm) of precipitation.

When does it snow in Glen Carbon?

January through May, October through December are months with snowfall in Glen Carbon.

How many days does it snow in Glen Carbon?

In Glen Carbon, Pennsylvania, during the entire year, snow falls for 23 days and aggregates up to 13.46" (342mm) of snow.

What are the months with the least sunshine in Glen Carbon?

January and February, with an average of 4.4h of sunshine, are months with the least sunshine in Glen Carbon.

What are the months with the lowest UV index in Glen Carbon?

The months with the lowest UV index in Glen Carbon are January through March, November and December, with an average maximum UV index of 2.

What is the most humid month in Glen Carbon?

With an average relative humidity of 82%, February is the most humid month in Glen Carbon.

What is the driest month in Glen Carbon?

February is the month with the least rainfall. Rain falls for 7.3 days and accumulates 1.69" (43mm) of precipitation.

When does it snow the most in Glen Carbon?

March is the month with the most snowfall. Snow falls for 5.2 days and accumulates 3.86" (98mm) of snow.

When is Daylight Saving Time (DST) in Glen Carbon?

On Sunday, March 10. 2024, at 2:00 am, Daylight Saving Time starts in Glen Carbon, 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 least humid month in Glen Carbon?

April is the least humid month in Glen Carbon, with an average relative humidity of 77%.

What is the rainiest month in Glen Carbon?

The month with the most rainfall is May, when the rain falls for 17.8 days and typically aggregates up to 3.07" (78mm) of precipitation.

When it does not snow in Glen Carbon?

In Glen Carbon, snow does not fall in June through September.

When are the longest days in Glen Carbon?

The month with the longest days is June, with an average of 15h and 0min of daylight.

When is the highest UV index in Glen Carbon?

June and July, with an average maximum UV index of 6, are months with the highest UV index.

What part of the year is the hottest in Glen Carbon?

July, on average, is the warmest month, registering a high temperature of 81.3°F (27.4°C) and a low of 61.7°F (16.5°C).

What month has the most sunshine in Glen Carbon?

July has the most sunshine of the year, with an average of 10.5h of sunshine.

What is the month with the shortest days in Glen Carbon?

With an average of 9h and 18min of daylight, December has the shortest days of the year in Glen Carbon.

Average temperature
Glen Carbon, PA

Average temperature - Glen Carbon, PA

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (32.7°F).

The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (20.1°F).

Average pressure
Glen Carbon, PA

Average pressure - Glen Carbon, PA

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

Average wind speed
Glen Carbon, PA

Average wind speed - Glen Carbon, PA

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (4.8mph).

Average humidity
Glen Carbon, PA

Average humidity - Glen Carbon, PA

The month with the highest relative humidity is February (82%).
The month with the lowest relative humidity is April (77%).

Average rainfall
Glen Carbon, PA

Average rainfall - Glen Carbon, PA

The wettest month (with the highest rainfall) is May (3.07").
The driest month (with the least rainfall) is February (1.69").

Average rainfall days
Glen Carbon, PA

Average rainfall days - Glen Carbon, PA

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is January (5.7 days).

Average snowfall
Glen Carbon, PA

Average snowfall - Glen Carbon, PA

The month with the highest snowfall is March (3.86").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days
Glen Carbon, PA

Average snowfall days - Glen Carbon, PA

The month with the highest number of snowfall days is February (6.4 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine
Glen Carbon, PA

Average daylight / Average sunshine - Glen Carbon, PA

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The months with the least sunshine are January and February (Average sunshine: 4h and 24min).

Average sunshine days
Glen Carbon, PA

Average sunshine days - Glen Carbon, PA

The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is May (10.8 days).

Average UV index
Glen Carbon, PA

Average UV index - Glen Carbon, PA

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average visibility
Glen Carbon, PA

Average visibility - Glen Carbon, PA

The months with the highest visibility are January, March, April, June, November and December (6mi).
The months with the lowest visibility are February, May, July, August, September and October (5mi).

Glen Carbon, Pennsylvania, USA

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