Climate and monthly weather forecast
Mendham, NJ

Weather in January

January, like December, in Mendham, New Jersey, is a wintry winter month, with an average temperature varying between 35.1°F (1.7°C) and 22.3°F (-5.4°C). With an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.3°F (-5.4°C), January is the coldest month. Weather in January »

Weather in February

The last month of the winter, February, is also a wintry month in Mendham, New Jersey, with an average temperature ranging between max 38.3°F (3.5°C) and min 23.7°F (-4.6°C). In Mendham, the average high-temperature in February is practically the same as in January - a still cold 38.3°F (3.5°C). Weather in February »

Weather in March

March, the first month of the spring in Mendham, is a frosty month, with an average temperature varying between 46.6°F (8.1°C) and 31.5°F (-0.3°C). In March, the average high-temperature slightly increases from a cold 38.3°F (3.5°C) in February to a chilly 46.6°F (8.1°C). Weather in March »

Weather in April

April is a moderate spring month in Mendham, New Jersey, with an average temperature ranging between min 41.5°F (5.3°C) and max 58.6°F (14.8°C). In April, the average high-temperature rises from a chilly 46.6°F (8.1°C) in March to a moderate 58.6°F (14.8°C). Weather in April »

Weather in May

May, the last month of the spring in Mendham, is an agreeable month, with an average temperature varying between 50.9°F (10.5°C) and 69.6°F (20.9°C). In Mendham, the average high-temperature in May rises from a moderate 58.6°F (14.8°C) in April to an agreeable 69.6°F (20.9°C). Weather in May »

Weather in June

The first month of the summer, June, is a warm month in Mendham, New Jersey, with an average temperature varying between 58.5°F (14.7°C) and 77.5°F (25.3°C). In Mendham, the average high-temperature in June marginally rises from a pleasant 69.6°F (20.9°C) in May to a moderately hot 77.5°F (25.3°C). Weather in June »

Weather in July

July, like June, in Mendham, New Jersey, is another warm summer month, with an average temperature varying between 64.8°F (18.2°C) and 83.7°F (28.7°C). July is the warmest month, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 64.8°F (18.2°C). In July, the average heat index is appraised at a tropical 91.6°F (33.1°C). Weather in July »

Weather in August

The last month of the summer, August, is another warm month in Mendham, New Jersey, with an average temperature fluctuating between 63°F (17.2°C) and 81.3°F (27.4°C). In Mendham, the average high-temperature in August is almost the same as in July - a still moderately hot 81.3°F (27.4°C). Weather in August »

Weather in September

The first month of the autumn, September, is still a warm month in Mendham, New Jersey, with an average temperature ranging between min 56.8°F (13.8°C) and max 74.5°F (23.6°C). In September, the average high-temperature slightly decreases from 81.3°F (27.4°C) in August to a still moderately hot 74.5°F (23.6°C). Weather in September »

Weather in October

October, the same as September, is another comfortable autumn month in Mendham, New Jersey, with an average temperature fluctuating between 62.2°F (16.8°C) and 47.1°F (8.4°C). In October, the average high-temperature drops from a moderately hot 74.5°F (23.6°C) in September to an enjoyable 62.2°F (16.8°C). Weather in October »

Weather in November

The last month of the autumn, November, is another cool month in Mendham, New Jersey, with an average temperature fluctuating between 36°F (2.2°C) and 50.4°F (10.2°C). In Mendham, New Jersey, the average high-temperature in November decreases from an enjoyable 62.2°F (16.8°C) in October to a cool 50.4°F (10.2°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Mendham, New Jersey, with an average temperature fluctuating between 29.3°F (-1.5°C) and 41°F (5°C). In December, the average high-temperature drops from a cool 50.4°F (10.2°C) in November to a wintry 41°F (5°C). Weather in December »
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FAQ

What is the coldest month in Mendham?

The coldest month is January, with an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.3°F (-5.4°C).

How many days does it rain in Mendham?

Throughout the year, in Mendham, New Jersey, there are 162.6 rainfall days, and 33.11" (841mm) of precipitation is accumulated.

When does it snow in Mendham?

January through May, October through December are months with snowfall in Mendham, New Jersey.

How much does it snow in Mendham?

Throughout the year, in Mendham, New Jersey, there are 28.5 snowfall days, and 14.49" (368mm) of snow is accumulated.

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

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

What are the most humid months in Mendham?

The months with the highest humidity are February and October, with an average relative humidity of 80%.

What is the month with the least sunshine in Mendham?

The month with the least sunshine is February, with an average of 4.6h of sunshine.

What is the snowiest month in Mendham?

The month with the most snowfall is March, when snow falls for 5.8 days and typically aggregates up to 4.49" (114mm) of snow.

When is Daylight Saving Time (DST) in Mendham?

On Sunday, March 13. 2022, at 2:00 am, Daylight Saving Time starts, and the time zone changes from EST to EDT. Daylight Saving Time ends Sunday, November 6. 2022, at 2:00 am, and the time zone reverts from EDT to EST.

What is the least humid month in Mendham?

With an average relative humidity of 75%, April is the least humid month in Mendham.

When it does not snow in Mendham?

June through September are months without snowfall in Mendham, New Jersey.

When are the longest days in Mendham?

The month with the longest days is June, with an average of 15h and 3min of daylight.

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

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

What is the warmest month in Mendham?

With an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 64.8°F (18.2°C), July is the warmest month in Mendham.

What month has the most sunshine in Mendham?

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

What is the driest month in Mendham?

September is the month with the least rainfall. Rain falls for 12.9 days and accumulates 1.85" (47mm) of precipitation.

What is the rainiest month in Mendham?

The month with the most rainfall in Mendham is December, when the rain falls for 10.9 days and typically aggregates up to 3.39" (86mm) of precipitation.

What is the month with the shortest days in Mendham?

With an average of 9h and 19min of daylight, December has the shortest days of the year.

Average temperature
Mendham, NJ

Average temperature - Mendham, NJ

The warmest month (with the highest average high temperature) is July (83.7°F).
The month with the lowest average high temperature is January (35.1°F).

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (22.3°F).

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Average pressure
Mendham, NJ

Average pressure - Mendham, NJ

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed
Mendham, NJ

Average wind speed - Mendham, NJ

The windiest month (with the highest average wind speed) is March (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity
Mendham, NJ

Average humidity - Mendham, NJ

The months with the highest relative humidity are February and October (80%).
The month with the lowest relative humidity is April (75%).

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Average rainfall
Mendham, NJ

Average rainfall - Mendham, NJ

The wettest month (with the highest rainfall) is December (3.39").
The driest month (with the least rainfall) is September (1.85").

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Average rainfall days
Mendham, NJ

Average rainfall days - Mendham, NJ

The months with the highest number of rainy days are May and July (17.3 days).
The month with the least rainy days is January (8.9 days).

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Average snowfall
Mendham, NJ

Average snowfall - Mendham, NJ

The month with the highest snowfall is March (4.49").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Mendham, NJ

Average snowfall days - Mendham, NJ

The month with the highest number of snowfall days is January (8.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Mendham, NJ

Average daylight / Average sunshine - Mendham, NJ

The month with the longest days is June (Average daylight: 15h and 3min).
The month with the shortest days is December (Average daylight: 9h and 19min).

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.6h).

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Average sunshine days
Mendham, NJ

Average sunshine days - Mendham, NJ

The month with the most sunshine days is November (17.6 days).
The month with the least sunshine days is May (11.4 days).

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Average UV index
Mendham, NJ

Average UV index - Mendham, NJ

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).

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Average visibility
Mendham, NJ

Average visibility - Mendham, NJ

The months with the highest visibility are January, February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are May, September and October (5mi).

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