Monthly weather forecast and climate
Old Tappan, NJ

January, the same as December, is another cold winter month in Old Tappan, New Jersey, with temperature in the range of an average low of 24.1°F (-4.4°C) and an average high of 35.4°F (1.9°C). January is the coldest month, with an average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 24.1°F (-4.4°C). Weather in January »

The last month of the winter, February, is another cold month in Old Tappan, New Jersey, with average temperature fluctuating between 38.8°F (3.8°C) and 25.7°F (-3.5°C). In Old Tappan, the average high-temperature is essentially the same as in January - a still cold 38.8°F (3.8°C). Weather in February »

The first month of the spring, March, is a chilly month in Old Tappan, New Jersey, with average temperature varying between 46.6°F (8.1°C) and 32.7°F (0.4°C). In March, the average high-temperature slightly increases, from a cold 38.8°F (3.8°C) in February, to a frosty 46.6°F (8.1°C). Weather in March »

April in Old Tappan, New Jersey, is a moderate spring month, with average temperature varying between 43.2°F (6.2°C) and 58.3°F (14.6°C). In Old Tappan, the average high-temperature increases, from a chilly 46.6°F (8.1°C) in March, to a moderate 58.3°F (14.6°C). Weather in April »

May, the last month of the spring, in Old Tappan, is a pleasant month, with average temperature fluctuating between 69.6°F (20.9°C) and 52.7°F (11.5°C). In Old Tappan, the average high-temperature increases, from a moderate 58.3°F (14.6°C) in April, to an agreeable 69.6°F (20.9°C). Weather in May »

The first month of the summer, June, is a moderately hot month in Old Tappan, New Jersey, with average temperature ranging between max 78.4°F (25.8°C) and min 60.6°F (15.9°C). In June, the average high-temperature marginally rises, from a pleasant 69.6°F (20.9°C) in May, to a moderately hot 78.4°F (25.8°C). Weather in June »

July, like June, in Old Tappan, New Jersey, is a moderately hot summer month, with average temperature ranging between min 68°F (20°C) and max 84.9°F (29.4°C). The warmest month is July, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 68°F (20°C). In July, the average heat index is evaluated at a tropical 92.5°F (33.6°C). Weather in July »

The last month of the summer, August, is another warm month in Old Tappan, New Jersey, with temperature in the range of an average high of 82.9°F (28.3°C) and an average low of 67.3°F (19.6°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 82.9°F (28.3°C). Weather in August »

The first month of the autumn, September, is still a warm month in Old Tappan, New Jersey, with temperature in the range of an average low of 59.9°F (15.5°C) and an average high of 75.4°F (24.1°C). In Old Tappan, New Jersey, the average high-temperature in September slightly decreases, from 82.9°F (28.3°C) in August, to a still moderately hot 75.4°F (24.1°C). Weather in September »

October, like September, in Old Tappan, New Jersey, is another comfortable autumn month, with average temperature fluctuating between 50.2°F (10.1°C) and 63.1°F (17.3°C). In October, the average high-temperature decreases, from a warm 75.4°F (24.1°C) in September, to a comfortable 63.1°F (17.3°C). Weather in October »

The last month of the autumn, November, is also a fresh month in Old Tappan, New Jersey, with average temperature ranging between min 38.5°F (3.6°C) and max 50.9°F (10.5°C). In November, the average high-temperature decreases, from an enjoyable 63.1°F (17.3°C) in October, to a cool 50.9°F (10.5°C). Weather in November »

The first month of the winter, December, is also a wintry month in Old Tappan, New Jersey, with average temperature ranging between min 30.9°F (-0.6°C) and max 41.7°F (5.4°C). In December, the average high-temperature decreases, from a cool 50.9°F (10.5°C) in November, to a cold 41.7°F (5.4°C). Weather in December »

What is the coldest month in Old Tappan?

With an average high-temperature of 35.4°F (1.9°C) and an average low-temperature of 24.1°F (-4.4°C), January is the coldest month in Old Tappan, New Jersey.

How many days does it rain in Old Tappan?

Throughout the year, in Old Tappan, New Jersey, there are 153.9 rainfall days, and 30.75" (781mm) of precipitation is accumulated.

When does it snow in Old Tappan?

January through April, November and December are months with snowfall in Old Tappan, New Jersey.

How many days does it snow in Old Tappan?

Throughout the year, in Old Tappan, there are 25.5 snowfall days, and 10.55" (268mm) of snow is accumulated.

When is the lowest UV index in Old Tappan?

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

What is the most humid month in Old Tappan?

February is the most humid month in Old Tappan, with an average relative humidity of 77%.

What is the month with the least sunshine in Old Tappan?

With an average of 4.6h of sunshine, February has the least sunshine of the year in Old Tappan.

When does it snow the most in Old Tappan?

The month with the most snowfall is March when snow falls for 5.4 days and typically aggregates up to 3.07" (78mm) of snow.

When it does not snow in Old Tappan?

In Old Tappan, New Jersey, snow does not fall in May through October.

When are the longest days in Old Tappan?

The month with the longest days in Old Tappan, New Jersey, is June, with an average of 15.1h of daylight.

When is the highest UV index in Old Tappan?

June through August, with an average maximum UV index of 6, are months with the highest UV index in Old Tappan.

What is the warmest month in Old Tappan?

July is the warmest month in Old Tappan, with an average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 68°F (20°C).

What month has the most sunshine in Old Tappan?

July has the most sunshine of the year, with an average of 10.3h of sunshine.

What is the least humid month in Old Tappan?

With an average relative humidity of 68%, August is the least humid month in Old Tappan, New Jersey.

What is the driest month in Old Tappan?

The month with the least rainfall in Old Tappan is September when the rain falls for 11.6 days and typically collects 1.73" (44mm) of precipitation.

What is the wettest month in Old Tappan?

The month with the most rainfall is December when the rain falls for 10.7 days and typically aggregates up to 3.46" (88mm) of precipitation.

What is the month with the shortest days in Old Tappan?

With an average of 9.3h of daylight, December has the shortest days of the year in Old Tappan.
Average temperature - Old Tappan, NJ
Average pressure - Old Tappan, NJ

The month with the highest atmospheric pressure is November (30.1").
The month with the lowest atmospheric pressure is June (29.93").

Average wind speed - Old Tappan, NJ

The windiest months (with the highest average wind speed) are January and March (8.5mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).

Average rainfall - Old Tappan, NJ

The wettest month (with the highest rainfall) is December (3.46").
The driest month (with the least rainfall) is September (1.73").

Average rainfall days - Old Tappan, NJ

The month with the highest number of rainy days is May (16.8 days).
The month with the least rainy days is January (8.2 days).

Average snowfall - Old Tappan, NJ
Average snowfall days - Old Tappan, NJ

The month with the highest number of snowfall days is January (6.9 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight / Average sunshine - Old Tappan, NJ

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days - Old Tappan, NJ

Months with the most sunshine days are January and November (18.1 days).
Months with the least sunshine days are April and June (12.7 days).

Average UV index - Old Tappan, NJ
Average visibility - Old Tappan, NJ

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