Climate and monthly weather forecast
Old Tappan, NJ

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Weather in January

January, like December, in Old Tappan, New Jersey, is a wintry winter month, 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 brings the lowest temperatures, with an average high of 35.4°F (1.9°C) and an average low of 24.1°F (-4.4°C). Weather in January »

Weather in February

February, the last month of the winter in Old Tappan, is also a wintry month, with an average temperature fluctuating between 25.7°F (-3.5°C) and 38.8°F (3.8°C). Entering February, the average high-temperature is recorded at a still cold 38.8°F (3.8°C), exhibiting a minimal shift from January's 35.4°F (1.9°C). Weather in February »

Weather in March

The first month of the spring, March, is a frosty month in Old Tappan, New Jersey, with an average temperature ranging between min 32.7°F (0.4°C) and max 46.6°F (8.1°C). With the onset of March, the average high-temperature subtly transitions from a wintry 38.8°F (3.8°C) in February to a frosty 46.6°F (8.1°C). Weather in March »

Weather in April

April in Old Tappan, New Jersey, is a moderate spring month, with an average temperature fluctuating between 58.3°F (14.6°C) and 43.2°F (6.2°C). April signals a shift in the average high-temperature, moving from March's chilly 46.6°F (8.1°C) to a mild 58.3°F (14.6°C). Weather in April »

Weather in May

The last month of the spring, May, is a pleasant month in Old Tappan, New Jersey, with an average temperature fluctuating between 52.7°F (11.5°C) and 69.6°F (20.9°C). Observing a rise in May, the average high-temperature goes from April's mild 58.3°F (14.6°C) to a pleasant 69.6°F (20.9°C). Weather in May »

Weather in June

The first month of the summer, June, is a moderately hot month in Old Tappan, New Jersey, with an average temperature fluctuating between 78.4°F (25.8°C) and 60.6°F (15.9°C). June marks a minor ascent in the average high-temperature, adjusting from May's pleasant 69.6°F (20.9°C) to a moderately hot 78.4°F (25.8°C). Weather in June »

Weather in July

July, like June, in Old Tappan, New Jersey, is another warm summer month, with an average temperature ranging between min 68°F (20°C) and max 84.9°F (29.4°C). July is the month when Old Tappan sees the highest average temperatures, with a high of 84.9°F (29.4°C) and a low of 68°F (20°C). The average heat index in July is estimated at a tropical 93.2°F (34°C). Weather in July »

Weather in August

August, the last month of the summer in Old Tappan, is also a moderately hot month, with an average temperature ranging between max 82.9°F (28.3°C) and min 67.3°F (19.6°C). The onset of August notes an average high-temperature of a still moderately hot 82.9°F (28.3°C), subtly shifted from July's 84.9°F (29.4°C). Weather in August »

Weather in September

September, the first month of the autumn in Old Tappan, is still a warm month, with an average temperature ranging between max 75.4°F (24.1°C) and min 59.9°F (15.5°C). September witnesses a gentle descent in average high-temperature, descending from August's moderately hot 82.9°F (28.3°C) to a still warm 75.4°F (24.1°C). Weather in September »

Weather in October

October, like September, in Old Tappan, New Jersey, is another comfortable autumn month, with temperature in the range of an average high of 63.1°F (17.3°C) and an average low of 50.2°F (10.1°C). The onset of October entails a temperature shift, as the average high-temperature decreases from a moderately hot 75.4°F (24.1°C) in September to a comfortable 63.1°F (17.3°C). Weather in October »

Weather in November

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

Weather in December

December, the first month of the winter in Old Tappan, is also an icy month, with an average temperature fluctuating between 41.7°F (5.4°C) and 30.9°F (-0.6°C). The arrival of December corresponds with a reduction in the average high-temperature, down from November's fresh 50.9°F (10.5°C) to a cold 41.7°F (5.4°C). Weather in December »

Frequently asked questions

What is the coldest month?

Old Tappan's coldest month, January, registers temperatures that range from a high of 35.4°F (1.9°C) to a low of 24.1°F (-4.4°C).

How much does it rain?

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

When does it snow?

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

How much does it snow?

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

What is the month with the lowest UV index?

The 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?

The most humid month is February, with an average relative humidity of 77%.

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

February has the least sunshine of the year, with an average of 4.6h of sunshine.

What is the snowiest month?

March is the month with the most snowfall. Snow falls for 5.4 days and accumulates 3.07" (78mm) 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.

When it does not snow?

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

When are the longest days?

With an average of 15h and 6min of daylight, June has the longest days of the year.

What is the month with the highest UV index?

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

What are the warmest months?

July, noted for its average high-temperature of 84.9°F (29.4°C) and an average low-temperature of 68°F (20°C), is considered the warmest month.

What month has the most sunshine?

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

What is the least humid month?

The least humid month is August, with an average relative humidity of 68%.

What is the driest month?

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

What is the wettest month?

December is the month with the most rainfall. Rain falls for 10.7 days and accumulates 3.46" (88mm) of precipitation.

What is the month with the shortest days?

The month with the shortest days is December, with an average of 9h and 18min of daylight.

Average temperature
Old Tappan, NJ

Average temperature - Old Tappan, NJ

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (35.4°F).

The month with the highest average low temperature is July (68°F).
The coldest month (with the lowest average low temperature) is January (24.1°F).

Average pressure
Old Tappan, NJ

Average pressure - Old Tappan, NJ

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

Average wind speed
Old Tappan, NJ

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 humidity
Old Tappan, NJ

Average humidity - Old Tappan, NJ

The month with the highest relative humidity is February (77%).
The month with the lowest relative humidity is August (68%).

Average rainfall
Old Tappan, NJ

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

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 - Old Tappan, NJ

The month with the highest snowfall is March (3.07").
The months with the least snowfall are May, June, July, August, September and October (0").

Average snowfall days
Old Tappan, NJ

Average snowfall days - Old Tappan, NJ

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

Average daylight / Average sunshine
Old Tappan, NJ

Average daylight / Average sunshine - Old Tappan, NJ

The month with the longest days is June (Average daylight: 15h and 6min).
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 18min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

Average sunshine days
Old Tappan, NJ

Average sunshine days - Old Tappan, NJ

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

Average UV index
Old Tappan, NJ

Average UV index - Old Tappan, NJ

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

Average cloud cover
Old Tappan, NJ

Average cloud cover - Old Tappan, NJ

The months with the most cloud cover are February, March and December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility
Old Tappan, NJ

Average visibility - Old Tappan, NJ

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

Old Tappan, New Jersey, USA

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