Climate and monthly weather forecast
Chatham, NY

Weather in January

January, like December, is another subzero cold winter month in Chatham, New York, with an average temperature ranging between min 16.7°F (-8.5°C) and max 29.1°F (-1.6°C). The coldest month is January, with an average high-temperature of 29.1°F (-1.6°C) and an average low-temperature of 16.7°F (-8.5°C). Weather in January »

Weather in February

February, the last month of the winter in Chatham, is a wintry month, with an average temperature fluctuating between 32.5°F (0.3°C) and 18°F (-7.8°C). In February, the average high-temperature is essentially the same as in January - a cold 32.5°F (0.3°C). Weather in February »

Weather in March

March, the first month of the spring in Chatham, is still a cold month, with an average temperature fluctuating between 25.7°F (-3.5°C) and 41.2°F (5.1°C). In Chatham, the average high-temperature in March slightly increases from 32.5°F (0.3°C) in February to a still cold 41.2°F (5.1°C). Weather in March »

Weather in April

April in Chatham, New York, is a fresh spring month, with temperature in the range of an average high of 54.3°F (12.4°C) and an average low of 36.1°F (2.3°C). In April, the average high-temperature increases from a wintry 41.2°F (5.1°C) in March to a fresh 54.3°F (12.4°C). Weather in April »

Weather in May

May, the last month of the spring in Chatham, is an enjoyable month, with an average temperature ranging between max 67.3°F (19.6°C) and min 46.6°F (8.1°C). In May, the average high-temperature increases from a cool 54.3°F (12.4°C) in April to an enjoyable 67.3°F (19.6°C). Weather in May »

Weather in June

June, the first month of the summer in Chatham, is a warm month, with an average temperature ranging between min 53.2°F (11.8°C) and max 74.8°F (23.8°C). In June, the average high-temperature marginally rises from an enjoyable 67.3°F (19.6°C) in May to a warm 74.8°F (23.8°C). Weather in June »

Weather in July

July, the same as June, is a moderately hot summer month in Chatham, New York, with temperature in the range of an average high of 80.8°F (27.1°C) and an average low of 59°F (15°C). The warmest month is July, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 59°F (15°C). In July, the average heat index is computed to be 85.5°F (29.7°C). Weather in July »

Weather in August

August, the last month of the summer in Chatham, is another warm month, with an average temperature ranging between min 57.2°F (14°C) and max 78.8°F (26°C). In August, the average high-temperature is relatively the same as in July - a still warm 78.8°F (26°C). Weather in August »

Weather in September

The first month of the autumn, September, is also an agreeable month in Chatham, New York, with temperature in the range of an average high of 71.2°F (21.8°C) and an average low of 51.1°F (10.6°C). In September, the average high-temperature slightly decreases from a warm 78.8°F (26°C) in August to an agreeable 71.2°F (21.8°C). Weather in September »

Weather in October

October, the same as September, in Chatham, New York, is another mild autumn month, with an average temperature varying between 58.1°F (14.5°C) and 42.8°F (6°C). In October, the average high-temperature decreases from a pleasant 71.2°F (21.8°C) in September to a moderate 58.1°F (14.5°C). Weather in October »

Weather in November

The last month of the autumn, November, is another chilly month in Chatham, New York, with an average temperature varying between 45.5°F (7.5°C) and 32°F (0°C). In November, the average high-temperature drops from a mild 58.1°F (14.5°C) in October to a chilly 45.5°F (7.5°C). Weather in November »

Weather in December

The first month of the winter, December, is still a cold month in Chatham, New York, with an average temperature fluctuating between 24.1°F (-4.4°C) and 34.9°F (1.6°C). In Chatham, the average high-temperature in December decreases from a frosty 45.5°F (7.5°C) in November to a cold 34.9°F (1.6°C). Weather in December »
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FAQ

What is the coldest month in Chatham?

The coldest month is January, with an average high-temperature of 29.1°F (-1.6°C) and an average low-temperature of 16.7°F (-8.5°C).

What is the driest month in Chatham?

The month with the least rainfall in Chatham, New York, is January, when the rain falls for 5.7 days and typically collects 1.1" (28mm) of precipitation.

How much does it rain in Chatham?

Throughout the year, there are 135.1 rainfall days, and 20.39" (518mm) of precipitation is accumulated.

When does it snow in Chatham?

Months with snowfall in Chatham, New York, are January through May, October through December.

How many days does it snow in Chatham?

Throughout the year, in Chatham, there are 36.9 snowfall days, and 15.98" (406mm) of snow is accumulated.

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

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

What are the most humid months in Chatham?

The months with the highest humidity are February and December, with an average relative humidity of 83%.

What is the month with the least sunshine in Chatham?

The month with the least sunshine in Chatham is February, with an average of 3.8h of sunshine.

When does it snow the most in Chatham?

March is the month with the most snowfall in Chatham. Snow falls for 7.8 days and accumulates 3.9" (99mm) of snow.

When is Daylight Saving Time (DST) in Chatham?

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 Chatham?

April is the least humid month in Chatham, New York, with an average relative humidity of 75%.

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

May through August, with an average maximum UV index of 5, are months with the highest UV index.

When it does not snow in Chatham?

In Chatham, snow does not fall in June through September.

When are the longest days in Chatham?

With an average of 15h and 14min of daylight, June has the longest days of the year in Chatham, New York.

What is the warmest month in Chatham?

The warmest month in Chatham is July, with an average high-temperature of 80.8°F (27.1°C) and an average low-temperature of 59°F (15°C).

What is the wettest month in Chatham?

The month with the most rainfall in Chatham is July, when the rain falls for 14.9 days and typically aggregates up to 2.4" (61mm) of precipitation.

What are the months with the most sunshine in Chatham?

July and August, with an average of 10.3h of sunshine, are months with the most sunshine.

What is the month with the shortest days in Chatham?

The month with the shortest days in Chatham, New York, is December, with an average of 9h and 8min of daylight.

Average pressure
Chatham, NY

Average pressure - Chatham, NY

The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed
Chatham, NY

Average wind speed - Chatham, NY

The windiest months (with the highest average wind speed) are January and March (8.2mph).
The calmest month (with the lowest average wind speed) is August (5mph).

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Average humidity
Chatham, NY

Average humidity - Chatham, NY

The months with the highest relative humidity are February and December (83%).
The month with the lowest relative humidity is April (75%).

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Average rainfall
Chatham, NY

Average rainfall - Chatham, NY

The wettest month (with the highest rainfall) is July (2.4").
The driest month (with the least rainfall) is January (1.1").

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Average rainfall days
Chatham, NY

Average rainfall days - Chatham, NY

The month with the highest number of rainy days is May (15.8 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall
Chatham, NY

Average snowfall - Chatham, NY

The month with the highest snowfall is March (3.9").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days
Chatham, NY

Average snowfall days - Chatham, NY

The month with the highest number of snowfall days is February (9.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight / Average sunshine
Chatham, NY

Average daylight / Average sunshine - Chatham, NY

The month with the longest days is June (Average daylight: 15h and 14min).
The month with the shortest days is December (Average daylight: 9h and 8min).

The months with the most sunshine are July and August (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 3h and 48min).

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Average sunshine days
Chatham, NY

Average sunshine days - Chatham, NY

The month with the most sunshine days is January (20 days).
The month with the least sunshine days is June (12.5 days).

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Average UV index
Chatham, NY

Average UV index - Chatham, NY

The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average visibility
Chatham, NY

Average visibility - Chatham, NY

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

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