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

Monthly weather forecast and climate
New Castle, NH

January, the same as December, in New Castle, New Hampshire, is a freezing cold winter month, with temperature in the range of an average high of 31.8°F (-0.1°C) and an average low of 21.2°F (-6°C). The coldest month is January, with an average high-temperature of 31.8°F (-0.1°C) and an average low-temperature of 21.2°F (-6°C). Weather in January »

The last month of the winter, February, is a wintry month in New Castle, New Hampshire, with average temperature ranging between max 34.2°F (1.2°C) and min 22.3°F (-5.4°C). In February, the average high-temperature is practically the same as in January - a cold 34.2°F (1.2°C). Weather in February »

The first month of the spring, March, is also a wintry month in New Castle, New Hampshire, with average temperature fluctuating between 28.8°F (-1.8°C) and 40.5°F (4.7°C). In New Castle, the average high-temperature marginally rises, from a cold 34.2°F (1.2°C) in February, to a still wintry 40.5°F (4.7°C). Weather in March »

April in New Castle, New Hampshire, is a cool spring month, with average temperature varying between 51.1°F (10.6°C) and 38.8°F (3.8°C). In New Castle, the average high-temperature in April rises, from a cold 40.5°F (4.7°C) in March, to a cool 51.1°F (10.6°C). Weather in April »

May, the last month of the spring, in New Castle, is an enjoyable month, with average temperature varying between 61°F (16.1°C) and 48°F (8.9°C). In May, the average high-temperature increases, from a cool 51.1°F (10.6°C) in April, to a comfortable 61°F (16.1°C). Weather in May »

The first month of the summer, June, is an agreeable month in New Castle, New Hampshire, with average temperature fluctuating between 69.3°F (20.7°C) and 55.4°F (13°C). In June, the average high-temperature slightly increases, from an enjoyable 61°F (16.1°C) in May, to a pleasant 69.3°F (20.7°C). Weather in June »

July is a warm summer month in New Castle, New Hampshire, with average temperature varying between 76.3°F (24.6°C) and 62.6°F (17°C). With an average high-temperature of 76.3°F (24.6°C) and an average low-temperature of 62.6°F (17°C), July is the warmest month. Weather in July »

August, the last month of the summer, in New Castle, is also a moderately hot month, with average temperature varying between 75.7°F (24.3°C) and 61.7°F (16.5°C). In New Castle, the average high-temperature is almost the same as in July - a still moderately hot 75.7°F (24.3°C). Weather in August »

September, the first month of the autumn, in New Castle, is also an agreeable month, with temperature in the range of an average low of 56.1°F (13.4°C) and an average high of 69.1°F (20.6°C). In New Castle, the average high-temperature marginally drops, from a warm 75.7°F (24.3°C) in August, to a pleasant 69.1°F (20.6°C). Weather in September »

October, the same as September, in New Castle, New Hampshire, is a moderate autumn month, with average temperature fluctuating between 47.1°F (8.4°C) and 57.9°F (14.4°C). In October, the average high-temperature drops, from a pleasant 69.1°F (20.6°C) in September, to a moderate 57.9°F (14.4°C). Weather in October »

November, the last month of the autumn, in New Castle, is also a frosty month, with temperature in the range of an average high of 47.1°F (8.4°C) and an average low of 36.1°F (2.3°C). In November, the average high-temperature decreases, from a moderate 57.9°F (14.4°C) in October, to a frosty 47.1°F (8.4°C). Weather in November »

December, the first month of the winter, in New Castle, is still a cold month, with average temperature ranging between max 37.6°F (3.1°C) and min 28°F (-2.2°C). In December, the average high-temperature drops, from a chilly 47.1°F (8.4°C) in November, to a wintry 37.6°F (3.1°C). Weather in December »

What is the coldest month in New Castle?

The coldest month in New Castle, New Hampshire, is January, with an average high-temperature of 31.8°F (-0.1°C) and an average low-temperature of 21.2°F (-6°C).

How much does it rain in New Castle?

Throughout the year, in New Castle, New Hampshire, there are 144.2 rainfall days, and 27.48" (698mm) of precipitation is accumulated.

When does it snow in New Castle?

Months with snowfall in New Castle, New Hampshire, are January through April, October through December.

How much does it snow in New Castle?

In New Castle, during the entire year, snow falls for 35.2 days, and aggregates up to 16.97" (431mm) of snow.

What is the snowiest month in New Castle?

The month with the most snowfall is January when snow falls for 8.8 days and typically aggregates up to 4.02" (102mm) of snow.

What is the month with the lowest UV index in New Castle?

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

What is the month with the least sunshine in New Castle?

February and December, with an average of 4.8h of sunshine, are months with the least sunshine in New Castle.

What is the month with the coldest ocean in New Castle?

The month with the coldest seawater is March, with an average ocean temperature of 38.5°F (3.6°C).

What is the least humid month in New Castle?

April and November, with an average relative humidity of 75%, are the least humid months in New Castle, New Hampshire.

When it does not snow in New Castle?

In New Castle, New Hampshire, snow does not fall in May through September.

What is the most humid month in New Castle?

With an average relative humidity of 80%, June is the most humid month in New Castle, New Hampshire.

When are the longest days in New Castle?

The month with the longest days is June, with an average of 15.3h of daylight.

What is the warmest month in New Castle?

July is the warmest month, with an average high-temperature of 76.3°F (24.6°C) and an average low-temperature of 62.6°F (17°C).

What are the months with the highest UV index in New Castle?

Months with the highest UV index in New Castle, New Hampshire, are July and August, with an average maximum UV index of 6.

What is the month with the warmest ocean in New Castle?

With an average ocean temperature of 65.7°F (18.7°C), August is the month with the warmest seawater in New Castle.

What month has the most sunshine in New Castle?

August has the most sunshine of the year in New Castle, with an average of 10.6h of sunshine.

What is the driest month in New Castle?

September is the month with the least rainfall in New Castle, New Hampshire. Rain falls for 11.3 days and accumulates 1.54" (39mm) of precipitation.

What is the wettest month in New Castle?

October is the month with the most rainfall. Rain falls for 13.3 days and accumulates 2.83" (72mm) of precipitation.

What is the month with the shortest days in New Castle?

December has the shortest days of the year, with an average of 9.1h of daylight.
Average humidity - New Castle, NH
Average rainfall - New Castle, NH
Average rainfall days - New Castle, NH

The month with the highest number of rainy days is June (15 days).
The month with the least rainy days is January (7.5 days).

Average snowfall - New Castle, NH
Average snowfall days - New Castle, NH

The month with the highest number of snowfall days is January (8.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average sea temperature - New Castle, NH

The best month for swimming (with the highest average sea temperature) is August (18.7°C).
The coldest month (with the lowest average sea temperature) is March (3.6°C).

Average daylight / Average sunshine - New Castle, NH

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

The month with the most sunshine is August (Average sunshine: 10.6h).
Months with the least sunshine are February and December (Average sunshine: 4.8).

Average UV index - New Castle, NH