Climate and monthly weather forecast
Glen Carbon, PA

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Weather in January

January, like December, in Glen Carbon, Pennsylvania, is a wintry winter month, with temperature in the range of an average low of 20.1°F (-6.6°C) and an average high of 32.7°F (0.4°C). During the coldest month, January, temperatures average a high of 32.7°F (0.4°C) and a low of 20.1°F (-6.6°C). Weather in January »

Weather in February

The last month of the winter, February, is another cold month in Glen Carbon, Pennsylvania, with an average temperature varying between 36.5°F (2.5°C) and 22.3°F (-5.4°C). February reports an average high-temperature of a still wintry 36.5°F (2.5°C), slightly varied from January's 32.7°F (0.4°C). Weather in February »

Weather in March

The first month of the spring, March, is a chilly 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). A slight uplift in the average high-temperature marks March, adjusting from February's icy 36.5°F (2.5°C) to a chilly 45.1°F (7.3°C). Weather in March »

Weather in April

April in Glen Carbon, Pennsylvania, is a moderate spring month, with an average temperature fluctuating between 57.4°F (14.1°C) and 39.7°F (4.3°C). The transition to April introduces an increase in the average high-temperature, shifting from a chilly 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 an agreeable month, with an average temperature fluctuating between 49.8°F (9.9°C) and 68.4°F (20.2°C). As April transitions into May, a change in temperatures is observed, with average highs moving from a refreshing 57.4°F (14.1°C) to an agreeable 68.4°F (20.2°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Glen Carbon, Pennsylvania, with an average temperature ranging between min 56.8°F (13.8°C) and max 76.1°F (24.5°C). As May gives way to June, the average high-temperature displays a slight ascent, adjusting from a pleasant 68.4°F (20.2°C) to a warm 76.1°F (24.5°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Glen Carbon, Pennsylvania, with an average temperature ranging between min 61.7°F (16.5°C) and max 81.3°F (27.4°C). Glen Carbon's July weather reaches an average high of 81.3°F (27.4°C) and an average low of 61.7°F (16.5°C), making it the warmest month. During July, the heat index is computed to be a hot 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 temperature in the range of an average high of 79.2°F (26.2°C) and an average low of 60.1°F (15.6°C). The onset of August marks an average high-temperature of a still warm 79.2°F (26.2°C), hardly differing from July's 81.3°F (27.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Glen Carbon, Pennsylvania, with an average temperature ranging between max 73°F (22.8°C) and min 53.8°F (12.1°C). The start of September comes with a small reduction in the average high-temperature, subtly receding from a warm 79.2°F (26.2°C) in August to a pleasant 73°F (22.8°C). Weather in September »

Weather in October

October, like September, is another refreshing autumn month in Glen Carbon, Pennsylvania, with temperature in the range of an average low of 44.6°F (7°C) and an average high of 60.6°F (15.9°C). A moderate decline in the average high-temperature is seen during October, decreasing from a pleasant 73°F (22.8°C) in September to a mild 60.6°F (15.9°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Glen Carbon, Pennsylvania, 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 onset of November entails a temperature shift, as the average high-temperature decreases from a moderate 60.6°F (15.9°C) in October to a chilly 47.8°F (8.8°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Glen Carbon, Pennsylvania, with an average temperature varying between 38.8°F (3.8°C) and 27.9°F (-2.3°C). The arrival of December signals a shift in temperature, down from a frosty 47.8°F (8.8°C) in November to an icy 38.8°F (3.8°C). Weather in December »
Updated: Aug 31, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What is the coldest time of year?

January, marked by an average high-temperature of 32.7°F (0.4°C) and a low-temperature of 20.1°F (-6.6°C), is the coldest month.

How much does it rain?

Throughout the year, there are 146 rainfall days, and 26.42" (671mm) of precipitation is accumulated.

When does it snow?

January through May, October through December are months with snowfall.

How much does it snow?

In Glen Carbon, 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?

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

When is the lowest UV index?

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

What is the most humid month?

February is the most humid month, with an average relative humidity of 82%.

What is the driest month?

The month with the least rainfall is February, when the rain falls for 7.3 days and typically collects 1.69" (43mm) of precipitation.

When does it snow the most?

The month with the most snowfall in Glen Carbon is March, when snow falls for 5.2 days and typically aggregates up to 3.86" (98mm) 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 least humid month?

With an average relative humidity of 77%, April is the least humid month.

What is the rainiest month?

The month with the most rainfall in Glen Carbon, Pennsylvania, 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, snow does not fall in June through September.

When are the longest days?

June has the longest days of the year, with an average of 15h and 0min of daylight.

What are the months with the highest UV index?

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

What month is the hottest?

July is the month that records the highest temperatures, with averages ranging from a high of 81.3°F (27.4°C) to a low of 61.7°F (16.5°C).

What month has the most sunshine?

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

What is the month with the shortest days?

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

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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