Bethlehem
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Bethlehem, PA

A tranquil setting of dry trees and neat fields behind this large hall in the Lehigh University in Bethlehem, Pennsylvania, under a scenic clear
A tranquil setting of dry trees and neat fields behind this large hall in the Lehigh University in Bethlehem, Pennsylvania, under a scenic clear
January, like December, in Bethlehem, Pennsylvania, is a wintry winter month, with average temperature fluctuating between 34°F (1.1°C) and 21.6°F (-5.8°C). With an average high-temperature of 34°F (1.1°C) and an average low-temperature of 21.6°F (-5.8°C), January is the coldest month. Weather in January »

February, the last month of the winter, in Bethlehem, is another cold month, with temperature in the range of an average high of 37.8°F (3.2°C) and an average low of 23.4°F (-4.8°C). In February, the average high-temperature is almost the same as in January - a still cold 37.8°F (3.2°C). Weather in February »

The first month of the spring, March, is a chilly month in Bethlehem, Pennsylvania, with average temperature fluctuating between 46°F (7.8°C) and 30°F (-1.1°C). In Bethlehem, the average high-temperature slightly increases, from a wintry 37.8°F (3.2°C) in February, to a chilly 46°F (7.8°C). Weather in March »

April in Bethlehem, Pennsylvania, is a moderate spring month, with temperature in the range of an average low of 40.6°F (4.8°C) and an average high of 58.6°F (14.8°C). In Bethlehem, the average high-temperature in April rises, from a chilly 46°F (7.8°C) in March, to a moderate 58.6°F (14.8°C). Weather in April »

May, the last month of the spring, in Bethlehem, is a pleasant month, with average temperature ranging between min 50.5°F (10.3°C) and max 69.6°F (20.9°C). In May, the average high-temperature rises, from a mild 58.6°F (14.8°C) in April, to a pleasant 69.6°F (20.9°C). Weather in May »

The first month of the summer, June, is a warm month in Bethlehem, Pennsylvania, with average temperature ranging between min 57.9°F (14.4°C) and max 77.4°F (25.2°C). In Bethlehem, the average high-temperature marginally rises, from an agreeable 69.6°F (20.9°C) in May, to a moderately hot 77.4°F (25.2°C). Weather in June »

July, the same as June, is another warm summer month in Bethlehem, Pennsylvania, with average temperature varying between 63.5°F (17.5°C) and 83.5°F (28.6°C). With an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 63.5°F (17.5°C), July is the warmest month. In July, the average heat index is evaluated at a hot 91.2°F (32.9°C). Weather in July »

The last month of the summer, August, is another warm month in Bethlehem, Pennsylvania, with average temperature ranging between min 61.5°F (16.4°C) and max 81°F (27.2°C). In August, the average high-temperature is almost the same as in July - a still moderately hot 81°F (27.2°C). Weather in August »

September, the first month of the autumn, in Bethlehem, is also a moderately hot month, with average temperature fluctuating between 55°F (12.8°C) and 74.3°F (23.5°C). In September, the average high-temperature marginally drops, from 81°F (27.2°C) in August, to a still moderately hot 74.3°F (23.5°C). Weather in September »

October, like September, in Bethlehem, Pennsylvania, is another enjoyable autumn month, with average temperature varying between 46.2°F (7.9°C) and 62.1°F (16.7°C). In Bethlehem, the average high-temperature drops, from a moderately hot 74.3°F (23.5°C) in September, to an enjoyable 62.1°F (16.7°C). Weather in October »

November, the last month of the autumn, in Bethlehem, is another cool month, with average temperature fluctuating between 50°F (10°C) and 35.4°F (1.9°C). In Bethlehem, the average high-temperature drops, from an enjoyable 62.1°F (16.7°C) in October, to a fresh 50°F (10°C). Weather in November »

The first month of the winter, December, is still a cold month in Bethlehem, Pennsylvania, with average temperature varying between 28.8°F (-1.8°C) and 40.1°F (4.5°C). In Bethlehem, Pennsylvania, the average high-temperature in December decreases, from a cool 50°F (10°C) in November, to a wintry 40.1°F (4.5°C). Weather in December »

What is the coldest month in Bethlehem?

The coldest month in Bethlehem, Pennsylvania, is January, with an average high-temperature of 34°F (1.1°C) and an average low-temperature of 21.6°F (-5.8°C).

How many days does it rain in Bethlehem?

Throughout the year, in Bethlehem, there are 153 rainfall days, and 26.81" (681mm) of precipitation is accumulated.

When does it snow in Bethlehem?

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

How much does it snow in Bethlehem?

In Bethlehem, Pennsylvania, during the entire year, snow falls for 26.7 days, and aggregates up to 14.49" (368mm) of snow.

What are the months with the lowest UV index in Bethlehem?

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 in Bethlehem?

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

What is the month with the least sunshine in Bethlehem?

With an average of 4.5h of sunshine, February has the least sunshine of the year in Bethlehem.

What is the snowiest month in Bethlehem?

The month with the most snowfall is March when snow falls for 5 days and typically aggregates up to 4.13" (105mm) of snow.

What is the least humid month in Bethlehem?

April and July, with an average relative humidity of 76%, are the least humid months in Bethlehem.

What is the month with the highest UV index in Bethlehem?

May through July, with an average maximum UV index of 6, are months with the highest UV index.

When it does not snow in Bethlehem?

In Bethlehem snow does not fall in June through September.

When are the longest days in Bethlehem?

With an average of 15h of daylight, June has the longest days of the year in Bethlehem, Pennsylvania.

What is the warmest month in Bethlehem?

The warmest month is July, with an average high-temperature of 83.5°F (28.6°C) and an average low-temperature of 63.5°F (17.5°C).

What is the rainiest month in Bethlehem?

July is the month with the most rainfall. Rain falls for 16.2 days and accumulates 2.91" (74mm) of precipitation.

What month has the most sunshine in Bethlehem?

The month with the most sunshine in Bethlehem, Pennsylvania, is July, with an average of 10.4h of sunshine.

What is the driest month in Bethlehem?

September is the month with the least rainfall in Bethlehem. Rain falls for 11.8 days and accumulates 1.57" (40mm) of precipitation.

What is the month with the shortest days in Bethlehem?

December has the shortest days of the year, with an average of 9.3h of daylight.
Average humidity - Bethlehem, PA
Average rainfall - Bethlehem, PA

The wettest month (with the highest rainfall) is July (2.91").
The driest month (with the lowest rainfall) is September (1.57").

Average rainfall days - Bethlehem, PA

The month with the highest number of rainy days is May (17.8 days).
The month with the lowest number of rainy days is January (7.8 days).

Average snowfall - Bethlehem, PA
Average snowfall days - Bethlehem, PA

Months with the highest number of snowfall days are January and February (7.8 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Bethlehem, PA
Average UV index - Bethlehem, PA