Monthly weather forecast and climate
Chatham, NJ

January, like December, in Chatham, New Jersey, is a wintry winter month, with average temperature fluctuating between 35.1°F (1.7°C) and 22.5°F (-5.3°C). With an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.5°F (-5.3°C), January is the coldest month. Weather in January »

February, the last month of the winter, in Chatham, is another cold month, with average temperature ranging between min 24.3°F (-4.3°C) and max 38.3°F (3.5°C). In Chatham, the average high-temperature is essentially the same as in January - a still wintry 38.3°F (3.5°C). Weather in February »

March, the first month of the spring, in Chatham, is a chilly month, with average temperature varying between 31.6°F (-0.2°C) and 46.4°F (8°C). In Chatham, New Jersey, the average high-temperature marginally rises, from a wintry 38.3°F (3.5°C) in February, to a chilly 46.4°F (8°C). Weather in March »

April in Chatham, New Jersey, is a mild spring month, with average temperature varying between 41.9°F (5.5°C) and 58.5°F (14.7°C). In April, the average high-temperature rises, from a chilly 46.4°F (8°C) in March, to a mild 58.5°F (14.7°C). Weather in April »

May, the last month of the spring, in Chatham, is a pleasant month, with average temperature fluctuating between 51.4°F (10.8°C) and 69.1°F (20.6°C). In May, the average high-temperature rises, from a mild 58.5°F (14.7°C) in April, to an agreeable 69.1°F (20.6°C). Weather in May »

The first month of the summer, June, is a warm month in Chatham, New Jersey, with average temperature ranging between max 77.5°F (25.3°C) and min 59°F (15°C). In June, the average high-temperature marginally rises, from a pleasant 69.1°F (20.6°C) in May, to a warm 77.5°F (25.3°C). Weather in June »

July, like June, in Chatham, New Jersey, is a moderately hot summer month, with average temperature varying between 83.7°F (28.7°C) and 65.7°F (18.7°C). The warmest month is July, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 65.7°F (18.7°C). The average heat index in July is evaluated at a tropical 91.4°F (33°C). Weather in July »

August, the last month of the summer, in Chatham, is also a moderately hot month, with average temperature fluctuating between 81.9°F (27.7°C) and 64.2°F (17.9°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 81.9°F (27.7°C). Weather in August »

September, the first month of the autumn, in Chatham, is also a moderately hot month, with average temperature varying between 57.6°F (14.2°C) and 74.5°F (23.6°C). In September, the average high-temperature marginally drops, from a moderately hot 81.9°F (27.7°C) in August, to a still warm 74.5°F (23.6°C). Weather in September »

October, the same as September, is another enjoyable autumn month in Chatham, New Jersey, with average temperature fluctuating between 62.2°F (16.8°C) and 47.5°F (8.6°C). In October, the average high-temperature drops, from a moderately hot 74.5°F (23.6°C) in September, to a comfortable 62.2°F (16.8°C). Weather in October »

November, the last month of the autumn, in Chatham, is another cool month, with average temperature ranging between max 50.5°F (10.3°C) and min 36.5°F (2.5°C). In November, the average high-temperature drops, from an enjoyable 62.2°F (16.8°C) in October, to a fresh 50.5°F (10.3°C). Weather in November »

The first month of the winter, December, is also a wintry month in Chatham, New Jersey, with average temperature fluctuating between 29.7°F (-1.3°C) and 40.8°F (4.9°C). In December, the average high-temperature drops, from a fresh 50.5°F (10.3°C) in November, to a wintry 40.8°F (4.9°C). Weather in December »

What is the coldest month in Chatham?

The coldest month in Chatham, New Jersey, is January, with an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.5°F (-5.3°C).

How many days does it rain in Chatham?

In Chatham, New Jersey, during the entire year, the rain falls for 164.2 days and collects up to 30.67" (779mm) of precipitation.

When does it snow in Chatham?

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

How many days does it snow in Chatham?

In Chatham, New Jersey, during the entire year, snow falls for 26 days, and aggregates up to 11.61" (295mm) of snow.

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

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

What are the most humid months in Chatham?

Months with the highest humidity are February and December, with an average relative humidity of 80%.

What is the month with the least sunshine in Chatham?

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

When does it snow the most in Chatham?

March is the month with the most snowfall in Chatham. Snow falls for 5.5 days and accumulates 3.5" (89mm) of snow.

What are the least humid months in Chatham?

Months with the lowest humidity in Chatham, New Jersey, are April and August, with an average relative humidity of 74%.

When it does not snow in Chatham?

June through September are months without snowfall in Chatham.

When are the longest days in Chatham?

With an average of 15.1h of daylight, June has the longest days of the year.

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

Months with the highest UV index in Chatham, New Jersey, are June through August, with an average maximum UV index of 6.

What is the warmest month in Chatham?

July is the warmest month, with an average high-temperature of 83.7°F (28.7°C) and an average low-temperature of 65.7°F (18.7°C).

What is the rainiest month in Chatham?

July is the month with the most rainfall in Chatham, New Jersey. Rain falls for 17.4 days and accumulates 3.27" (83mm) of precipitation.

What month has the most sunshine in Chatham?

The month with the most sunshine in Chatham is July, with an average of 10.3h of sunshine.

What is the driest month in Chatham?

The month with the least rainfall in Chatham is September when the rain falls for 13.5 days and typically collects 1.69" (43mm) of precipitation.

What is the month with the shortest days in Chatham?

The month with the shortest days in Chatham, New Jersey, is December, with an average of 9.3h of daylight.
Average temperature - Chatham, NJ
Average pressure - Chatham, NJ

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

Average wind speed - Chatham, NJ

The windiest month (with the highest average wind speed) is March (8.5mph).
The calmest month (with the lowest average wind speed) is August (5.3mph).

Average humidity - Chatham, NJ
Average rainfall - Chatham, NJ

The wettest month (with the highest rainfall) is July (3.27").
The driest month (with the least rainfall) is September (1.69").

Average rainfall days - Chatham, NJ

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (8.8 days).

Average snowfall - Chatham, NJ
Average snowfall days - Chatham, NJ

The month with the highest number of snowfall days is January (7.6 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Chatham, 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 - Chatham, NJ

The month with the most sunshine days is November (18.3 days).
The month with the least sunshine days is June (10.5 days).

Average UV index - Chatham, NJ
Average visibility - Chatham, NJ

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