Allentown
New Jersey, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Allentown, NJ

January, like December, in Allentown, New Jersey, is another cold winter month, with average temperature ranging between max 37.4°F (3°C) and min 25°F (-3.9°C). With an average high-temperature of 37.4°F (3°C) and an average low-temperature of 25°F (-3.9°C), January is the coldest month. Weather in January »

February, the last month of the winter, in Allentown, is also a wintry month, with average temperature fluctuating between 27°F (-2.8°C) and 41.2°F (5.1°C). In February, the average high-temperature is practically the same as in January - a still wintry 41.2°F (5.1°C). Weather in February »

The first month of the spring, March, is a chilly month in Allentown, New Jersey, with temperature in the range of an average low of 34.2°F (1.2°C) and an average high of 48.7°F (9.3°C). In March, the average high-temperature marginally rises, from a wintry 41.2°F (5.1°C) in February, to a frosty 48.7°F (9.3°C). Weather in March »

April in Allentown, New Jersey, is a mild spring month, with temperature in the range of an average low of 43.9°F (6.6°C) and an average high of 60.4°F (15.8°C). In April, the average high-temperature increases, from a frosty 48.7°F (9.3°C) in March, to a moderate 60.4°F (15.8°C). Weather in April »

The last month of the spring, May, is an agreeable month in Allentown, New Jersey, with temperature in the range of an average low of 53.4°F (11.9°C) and an average high of 70.3°F (21.3°C). In May, the average high-temperature increases, from a mild 60.4°F (15.8°C) in April, to an agreeable 70.3°F (21.3°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Allentown, New Jersey, with temperature in the range of an average high of 78.4°F (25.8°C) and an average low of 61.3°F (16.3°C). In June, the average high-temperature slightly increases, from an agreeable 70.3°F (21.3°C) in May, to a moderately hot 78.4°F (25.8°C). Weather in June »

July, the same as June, is another warm summer month in Allentown, New Jersey, with average temperature varying between 84.4°F (29.1°C) and 67.6°F (19.8°C). July is the warmest month, with an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 67.6°F (19.8°C). In July, the average heat index is estimated at a hot 93.6°F (34.2°C). Weather in July »

The last month of the summer, August, is also a moderately hot month in Allentown, New Jersey, with average temperature ranging between max 82.6°F (28.1°C) and min 66.2°F (19°C). In August, the average high-temperature is practically the same as in July - a still warm 82.6°F (28.1°C). Weather in August »

September, the first month of the autumn, in Allentown, is still a warm month, with temperature in the range of an average high of 75.9°F (24.4°C) and an average low of 59.9°F (15.5°C). In September, the average high-temperature slightly decreases, from 82.6°F (28.1°C) in August, to a still warm 75.9°F (24.4°C). Weather in September »

October, the same as September, is another enjoyable autumn month in Allentown, New Jersey, with average temperature fluctuating between 64.4°F (18°C) and 50°F (10°C). In October, the average high-temperature drops, from a warm 75.9°F (24.4°C) in September, to an enjoyable 64.4°F (18°C). Weather in October »

The last month of the autumn, November, is also a fresh month in Allentown, New Jersey, with average temperature ranging between min 38.8°F (3.8°C) and max 52.7°F (11.5°C). In November, the average high-temperature drops, from a comfortable 64.4°F (18°C) in October, to a cool 52.7°F (11.5°C). Weather in November »

December, the first month of the winter, in Allentown, is still a chilly month, with average temperature fluctuating between 43.7°F (6.5°C) and 32.2°F (0.1°C). In December, the average high-temperature decreases, from a cool 52.7°F (11.5°C) in November, to a frosty 43.7°F (6.5°C). Weather in December »

What is the coldest month in Allentown?

January is the coldest month in Allentown, New Jersey, with an average high-temperature of 37.4°F (3°C) and an average low-temperature of 25°F (-3.9°C).

How much does it rain in Allentown?

In Allentown, during the entire year, the rain falls for 152.9 days and collects up to 28.78" (731mm) of precipitation.

When does it snow in Allentown?

Months with snowfall are January through May, November and December.

How much does it snow in Allentown?

In Allentown, New Jersey, during the entire year, snow falls for 17.7 days, and aggregates up to 8.43" (214mm) of snow.

What is the month with the lowest UV index in Allentown?

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2.

What is the month with the least sunshine in Allentown?

February has the least sunshine of the year in Allentown, New Jersey, with an average of 4.8h of sunshine.

When does it snow the most in Allentown?

March is the month with the most snowfall. Snow falls for 3.6 days and accumulates 3.11" (79mm) of snow.

What is the least humid month in Allentown?

The least humid month in Allentown is April, with an average relative humidity of 73%.

What are the months with the highest UV index in Allentown?

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

When it does not snow in Allentown?

In Allentown, New Jersey, snow does not fall in June through October.

When are the longest days in Allentown?

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

What is the warmest month in Allentown?

With an average high-temperature of 84.4°F (29.1°C) and an average low-temperature of 67.6°F (19.8°C), July is the warmest month.

What is the rainiest month in Allentown?

July is the month with the most rainfall in Allentown. Rain falls for 17.8 days and accumulates 3.39" (86mm) of precipitation.

What month has the most sunshine in Allentown?

With an average of 10.5h of sunshine, July has the most sunshine of the year in Allentown, New Jersey.

What is the driest month in Allentown?

September is the month with the least rainfall in Allentown. Rain falls for 12.7 days and accumulates 1.65" (42mm) of precipitation.

What is the most humid month in Allentown?

With an average relative humidity of 79%, October is the most humid month in Allentown, New Jersey.

What is the month with the shortest days in Allentown?

With an average of 9.4h of daylight, December has the shortest days of the year in Allentown, New Jersey.
Average temperature - Allentown, NJ
Average rainfall - Allentown, NJ

The wettest month (with the highest rainfall) is July (3.39").
The driest month (with the least rainfall) is September (1.65").

Average rainfall days - Allentown, NJ

The month with the highest number of rainy days is July (17.8 days).
The month with the least rainy days is January (8.3 days).

Average snowfall - Allentown, NJ
Average snowfall days - Allentown, NJ

The month with the highest number of snowfall days is January (5.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight / Average sunshine - Allentown, NJ

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average UV index - Allentown, NJ