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

Monthly weather forecast and climate
Grantham, NH

January, like December, is another subzero cold winter month in Grantham, New Hampshire, with temperature in the range of an average high of 25.9°F (-3.4°C) and an average low of 13.3°F (-10.4°C). The coldest month is January, with an average high-temperature of 25.9°F (-3.4°C) and an average low-temperature of 13.3°F (-10.4°C). Weather in January »

February, the last month of the winter, in Grantham, is also a subzero cold month, with average temperature fluctuating between 28.8°F (-1.8°C) and 14.7°F (-9.6°C). In Grantham, the average high-temperature is essentially the same as in January - a still subzero cold 28.8°F (-1.8°C). Weather in February »

March, the first month of the spring, in Grantham, is a cold month, with temperature in the range of an average high of 37°F (2.8°C) and an average low of 22.5°F (-5.3°C). In March, the average high-temperature slightly increases, from a freezing cold 28.8°F (-1.8°C) in February, to a cold 37°F (2.8°C). Weather in March »

April is a fresh spring month in Grantham, New Hampshire, with average temperature fluctuating between 33.4°F (0.8°C) and 50.9°F (10.5°C). In Grantham, the average high-temperature rises, from a wintry 37°F (2.8°C) in March, to a cool 50.9°F (10.5°C). Weather in April »

The last month of the spring, May, is an enjoyable month in Grantham, New Hampshire, with average temperature fluctuating between 64.9°F (18.3°C) and 44.4°F (6.9°C). In Grantham, the average high-temperature increases, from a cool 50.9°F (10.5°C) in April, to an enjoyable 64.9°F (18.3°C). Weather in May »

The first month of the summer, June, is a pleasant month in Grantham, New Hampshire, with average temperature fluctuating between 50.9°F (10.5°C) and 72°F (22.2°C). In June, the average high-temperature slightly increases, from an enjoyable 64.9°F (18.3°C) in May, to an agreeable 72°F (22.2°C). Weather in June »

July in Grantham, New Hampshire, is a moderately hot summer month, with average temperature ranging between max 78.8°F (26°C) and min 57.2°F (14°C). With an average high-temperature of 78.8°F (26°C) and an average low-temperature of 57.2°F (14°C), July is the warmest month. Weather in July »

August, the last month of the summer, in Grantham, is also a moderately hot month, with average temperature ranging between max 76.6°F (24.8°C) and min 55.6°F (13.1°C). In August, the average high-temperature is essentially the same as in July - a still moderately hot 76.6°F (24.8°C). Weather in August »

September, the first month of the autumn, in Grantham, is still a pleasant month, with temperature in the range of an average high of 68.9°F (20.5°C) and an average low of 49.3°F (9.6°C). In Grantham, the average high-temperature in September slightly decreases, from a moderately hot 76.6°F (24.8°C) in August, to a pleasant 68.9°F (20.5°C). Weather in September »

October, the same as September, in Grantham, New Hampshire, is a moderate autumn month, with average temperature fluctuating between 40.6°F (4.8°C) and 55.9°F (13.3°C). In Grantham, the average high-temperature in October decreases, from an agreeable 68.9°F (20.5°C) in September, to a mild 55.9°F (13.3°C). Weather in October »

November, the last month of the autumn, in Grantham, is another cold month, with average temperature varying between 29.8°F (-1.2°C) and 42.6°F (5.9°C). In Grantham, the average high-temperature drops, from a mild 55.9°F (13.3°C) in October, to a wintry 42.6°F (5.9°C). Weather in November »

December, the first month of the winter, in Grantham, is still a freezing cold month, with average temperature varying between 21°F (-6.1°C) and 31.6°F (-0.2°C). In Grantham, the average high-temperature drops, from a wintry 42.6°F (5.9°C) in November, to a freezing cold 31.6°F (-0.2°C). Weather in December »

What is the coldest month in Grantham?

January is the coldest month in Grantham, New Hampshire, with an average high-temperature of 25.9°F (-3.4°C) and an average low-temperature of 13.3°F (-10.4°C).

What is the most humid month in Grantham?

Months with the highest humidity in Grantham, New Hampshire, are January and February, with an average relative humidity of 86%.

How much does it rain in Grantham?

Throughout the year, in Grantham, New Hampshire, there are 153.2 rainfall days, and 29.92" (760mm) of precipitation is accumulated.

When does it snow in Grantham?

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

How many days does it snow in Grantham?

In Grantham, during the entire year, snow falls for 65.4 days, and aggregates up to 42.72" (1085mm) of snow.

When does it snow the most in Grantham?

February is the month with the most snowfall in Grantham, New Hampshire. Snow falls for 14.3 days and accumulates 11.18" (284mm) of snow.

What is the month with the least sunshine in Grantham?

The month with the least sunshine in Grantham, New Hampshire, is February, with an average of 4h of sunshine.

When is the lowest UV index in Grantham?

Months with the lowest UV index are February and December, with an average maximum UV index of 1.

What is the least humid month in Grantham?

The least humid month in Grantham, New Hampshire, is April, with an average relative humidity of 75%.

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

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

When it does not snow in Grantham?

In Grantham, New Hampshire, snow does not fall in June through September.

When are the longest days in Grantham?

With an average of 15.4h of daylight, June has the longest days of the year in Grantham, New Hampshire.

What is the warmest month in Grantham?

July is the warmest month in Grantham, New Hampshire, with an average high-temperature of 78.8°F (26°C) and an average low-temperature of 57.2°F (14°C).

What month has the most sunshine in Grantham?

With an average of 10.1h of sunshine, August has the most sunshine of the year in Grantham.

What is the driest month in Grantham?

The month with the least rainfall in Grantham is September when the rain falls for 11.5 days and typically collects 2.05" (52mm) of precipitation.

What is the rainiest month in Grantham?

October is the month with the most rainfall in Grantham. Rain falls for 14 days and accumulates 3.39" (86mm) of precipitation.

What is the month with the shortest days in Grantham?

December has the shortest days of the year in Grantham, with an average of 9h of daylight.
Average temperature - Grantham, NH
Average humidity - Grantham, NH
Average rainfall - Grantham, NH

The wettest month (with the highest rainfall) is October (3.39").
The driest month (with the least rainfall) is September (2.05").

Average rainfall days - Grantham, NH

The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (7.9 days).

Average snowfall - Grantham, NH
Average snowfall days - Grantham, NH

The month with the highest number of snowfall days is February (14.3 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Grantham, NH

The month with the longest days is June (Average daylight: 15.4h).
The month with the shortest days is December (Average daylight: 9h).

The month with the most sunshine is August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 4h).