Chatham
New Hampshire, USA
Long-term weather forecast
Long-term weather forecast

Monthly weather forecast and climate
Chatham, NH

January, like December, is a freezing cold winter month in Chatham, New Hampshire, with average temperature varying between 10.4°F (-12°C) and 24.4°F (-4.2°C). With an average high-temperature of 24.4°F (-4.2°C) and an average low-temperature of 10.4°F (-12°C), January is the coldest month. Weather in January »

The last month of the winter, February, is also a subzero cold month in Chatham, New Hampshire, with average temperature fluctuating between 11.7°F (-11.3°C) and 26.8°F (-2.9°C). In Chatham, the average high-temperature in February is almost the same as in January - a still subzero cold 26.8°F (-2.9°C). Weather in February »

The first month of the spring, March, is a cold month in Chatham, New Hampshire, with temperature in the range of an average low of 19.8°F (-6.8°C) and an average high of 35.6°F (2°C). In Chatham, New Hampshire, the average high-temperature marginally rises, from a subzero cold 26.8°F (-2.9°C) in February, to a wintry 35.6°F (2°C). Weather in March »

April in Chatham, New Hampshire, is a chilly spring month, with temperature in the range of an average high of 48.6°F (9.2°C) and an average low of 31.1°F (-0.5°C). In Chatham, New Hampshire, the average high-temperature increases, from a wintry 35.6°F (2°C) in March, to a chilly 48.6°F (9.2°C). Weather in April »

May, the last month of the spring, in Chatham, is an enjoyable month, with average temperature fluctuating between 63.1°F (17.3°C) and 42.4°F (5.8°C). In Chatham, the average high-temperature increases considerably, from a chilly 48.6°F (9.2°C) in April, to a comfortable 63.1°F (17.3°C). Weather in May »

The first month of the summer, June, is an agreeable month in Chatham, New Hampshire, with average temperature ranging between max 70°F (21.1°C) and min 48.9°F (9.4°C). In June, the average high-temperature marginally rises, from a comfortable 63.1°F (17.3°C) in May, to a pleasant 70°F (21.1°C). Weather in June »

July is a warm summer month in Chatham, New Hampshire, with average temperature fluctuating between 76.8°F (24.9°C) and 55.8°F (13.2°C). July is the warmest month, with an average high-temperature of 76.8°F (24.9°C) and an average low-temperature of 55.8°F (13.2°C). Weather in July »

The last month of the summer, August, is another warm month in Chatham, New Hampshire, with average temperature ranging between max 75.9°F (24.4°C) and min 53.2°F (11.8°C). In Chatham, the average high-temperature in August is practically the same as in July - a still moderately hot 75.9°F (24.4°C). Weather in August »

The first month of the autumn, September, is still a pleasant month in Chatham, New Hampshire, with temperature in the range of an average low of 47.5°F (8.6°C) and an average high of 68.5°F (20.3°C). In Chatham, the average high-temperature marginally drops, from a moderately hot 75.9°F (24.4°C) in August, to a pleasant 68.5°F (20.3°C). Weather in September »

October, like September, in Chatham, New Hampshire, is a cool autumn month, with average temperature varying between 54°F (12.2°C) and 38.7°F (3.7°C). In October, the average high-temperature declines considerably, from an agreeable 68.5°F (20.3°C) in September, to a cool 54°F (12.2°C). Weather in October »

November, the last month of the autumn, in Chatham, is also a wintry month, with temperature in the range of an average low of 27.7°F (-2.4°C) and an average high of 40.8°F (4.9°C). In November, the average high-temperature drops, from a cool 54°F (12.2°C) in October, to a wintry 40.8°F (4.9°C). Weather in November »

The first month of the winter, December, is also a subzero cold month in Chatham, New Hampshire, with average temperature fluctuating between 29.8°F (-1.2°C) and 18.9°F (-7.3°C). In Chatham, the average high-temperature decreases, from a wintry 40.8°F (4.9°C) in November, to a subzero cold 29.8°F (-1.2°C). Weather in December »

What is the coldest month in Chatham?

The coldest month in Chatham, New Hampshire, is January, with an average high-temperature of 24.4°F (-4.2°C) and an average low-temperature of 10.4°F (-12°C).

How many days does it rain in Chatham?

Throughout the year, in Chatham, there are 158 rainfall days, and 18.58" (472mm) of precipitation is accumulated.

When does it snow in Chatham?

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

How much does it snow in Chatham?

Throughout the year, in Chatham, there are 64.6 snowfall days, and 25.31" (643mm) of snow is accumulated.

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

Months with the lowest UV index in Chatham, New Hampshire, are January through April, October through December, with an average maximum UV index of 2.

What is the most humid month in Chatham?

The most humid month is February, with an average relative humidity of 87%.

When does it snow the most in Chatham?

February is the month with the most snowfall in Chatham. Snow falls for 14.5 days and accumulates 6.73" (171mm) of snow.

What is the month with the least sunshine in Chatham?

With an average of 4.3h of sunshine, February has the least sunshine of the year in Chatham, New Hampshire.

What is the rainiest month in Chatham?

Months with the most rainfall are April and October, with an average 2.17" (55mm) of precipitation.

What is the least humid month in Chatham?

May and November, with an average relative humidity of 77%, are the least humid months.

When it does not snow in Chatham?

In Chatham snow does not fall in June through September.

When are the longest days in Chatham?

The month with the longest days in Chatham is June, with an average of 15.5h of daylight.

When is the highest UV index in Chatham?

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

What is the warmest month in Chatham?

July is the warmest month, with an average high-temperature of 76.8°F (24.9°C) and an average low-temperature of 55.8°F (13.2°C).

What month has the most sunshine in Chatham?

The month with the most sunshine is August, with an average of 10.1h of sunshine.

What is the driest month in Chatham?

The month with the least rainfall in Chatham is September when the rain falls for 10.3 days and typically collects 0.94" (24mm) of precipitation.

What is the month with the shortest days in Chatham?

December has the shortest days of the year in Chatham, with an average of 8.9h of daylight.
Average temperature - Chatham, NH
Average humidity - Chatham, NH
Average rainfall - Chatham, NH

The wettest months (with the highest rainfall) are April and October (2.17").
The driest month (with the least rainfall) is September (0.94").

Average rainfall days - Chatham, NH

The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is February (9.8 days).

Average snowfall - Chatham, NH
Average snowfall days - Chatham, NH

Months with the highest number of snowfall days are January and February (14.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Chatham, NH

The month with the longest days is June (Average daylight: 15.5h).
The month with the shortest days is December (Average daylight: 8.9h).

The month with the most sunshine is August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4.3h).

Average UV index - Chatham, NH

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, March, April, October, November and December (UV index 2).