Monthly weather forecast and climate
Londonderry, NH

January, like December, is another subzero cold winter month in Londonderry, New Hampshire, with temperature in the range of an average low of 18°F (-7.8°C) and an average high of 30.6°F (-0.8°C). The coldest month is January, with an average high-temperature of 30.6°F (-0.8°C) and an average low-temperature of 18°F (-7.8°C). Weather in January »

The last month of the winter, February, is a cold month in Londonderry, New Hampshire, with temperature in the range of an average high of 33.3°F (0.7°C) and an average low of 18.9°F (-7.3°C). In February, the average high-temperature is relatively the same as in January - a wintry 33.3°F (0.7°C). Weather in February »

March, the first month of the spring, in Londonderry, is still a cold month, with average temperature fluctuating between 41.2°F (5.1°C) and 26.4°F (-3.1°C). In March, the average high-temperature slightly increases, from 33.3°F (0.7°C) in February, to a still cold 41.2°F (5.1°C). Weather in March »

April in Londonderry, New Hampshire, is a cool spring month, with temperature in the range of an average high of 55°F (12.8°C) and an average low of 37.4°F (3°C). In Londonderry, the average high-temperature in April increases, from a cold 41.2°F (5.1°C) in March, to a fresh 55°F (12.8°C). Weather in April »

May, the last month of the spring, in Londonderry, is an enjoyable month, with average temperature varying between 66.9°F (19.4°C) and 47.1°F (8.4°C). In May, the average high-temperature increases, from a fresh 55°F (12.8°C) in April, to a comfortable 66.9°F (19.4°C). Weather in May »

June, the first month of the summer, in Londonderry, is a warm month, with average temperature varying between 54.5°F (12.5°C) and 74.5°F (23.6°C). In June, the average high-temperature marginally rises, from an enjoyable 66.9°F (19.4°C) in May, to a warm 74.5°F (23.6°C). Weather in June »

July, like June, in Londonderry, New Hampshire, is another warm summer month, with average temperature fluctuating between 61°F (16.1°C) and 81.7°F (27.6°C). The warmest month is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 61°F (16.1°C). The average heat index is estimated at a tropical 86.9°F (30.5°C). Weather in July »

August, the last month of the summer, in Londonderry, is also a moderately hot month, with average temperature fluctuating between 80.1°F (26.7°C) and 59.9°F (15.5°C). In August, the average high-temperature is practically the same as in July - a still warm 80.1°F (26.7°C). Weather in August »

The first month of the autumn, September, is still a pleasant month in Londonderry, New Hampshire, with average temperature varying between 72.1°F (22.3°C) and 54°F (12.2°C). In September, the average high-temperature marginally drops, from a moderately hot 80.1°F (26.7°C) in August, to a pleasant 72.1°F (22.3°C). Weather in September »

October, the same as September, in Londonderry, New Hampshire, is a moderate autumn month, with average temperature varying between 44.6°F (7°C) and 59.2°F (15.1°C). In Londonderry, the average high-temperature drops, from an agreeable 72.1°F (22.3°C) in September, to a mild 59.2°F (15.1°C). Weather in October »

The last month of the autumn, November, is also a frosty month in Londonderry, New Hampshire, with temperature in the range of an average low of 33.6°F (0.9°C) and an average high of 46.6°F (8.1°C). In Londonderry, the average high-temperature decreases, from a mild 59.2°F (15.1°C) in October, to a frosty 46.6°F (8.1°C). Weather in November »

December, the first month of the winter, in Londonderry, is still a cold month, with average temperature ranging between max 36.3°F (2.4°C) and min 25.3°F (-3.7°C). In Londonderry, the average high-temperature decreases, from a frosty 46.6°F (8.1°C) in November, to a wintry 36.3°F (2.4°C). Weather in December »

What is the coldest month in Londonderry?

The coldest month is January, with an average high-temperature of 30.6°F (-0.8°C) and an average low-temperature of 18°F (-7.8°C).

How many days does it rain in Londonderry?

In Londonderry, New Hampshire, during the entire year, the rain falls for 104.4 days and collects up to 12.95" (329mm) of precipitation.

What is the driest month in Londonderry?

January is the month with the least rainfall in Londonderry. Rain falls for 4.1 days and accumulates 0.75" (19mm) of precipitation.

When does it snow in Londonderry?

Months with snowfall in Londonderry, New Hampshire, are January through May, October through December.

How many days does it snow in Londonderry?

Throughout the year, in Londonderry, New Hampshire, there are 26.1 snowfall days, and 11.54" (293mm) of snow is accumulated.

What are the months with the lowest UV index in Londonderry?

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

What is the most humid month in Londonderry?

The most humid month in Londonderry is February, with an average relative humidity of 81%.

What is the month with the least sunshine in Londonderry?

With an average of 4.6h of sunshine, February has the least sunshine of the year in Londonderry.

What is the least humid month in Londonderry?

April is the least humid month in Londonderry, New Hampshire, with an average relative humidity of 72%.

When it does not snow in Londonderry?

In Londonderry snow does not fall in June through September.

When are the longest days in Londonderry?

With an average of 15.3h of daylight, June has the longest days of the year.

What are the months with the highest UV index in Londonderry?

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

What is the warmest month in Londonderry?

The warmest month is July, with an average high-temperature of 81.7°F (27.6°C) and an average low-temperature of 61°F (16.1°C).

What month has the most sunshine in Londonderry?

The month with the most sunshine is August, with an average of 10.4h of sunshine.

What is the rainiest month in Londonderry?

October is the month with the most rainfall. Rain falls for 9.4 days and accumulates 1.38" (35mm) of precipitation.

When does it snow the most in Londonderry?

The month with the most snowfall is December when snow falls for 4 days and typically aggregates up to 2.99" (76mm) of snow.

What is the month with the shortest days in Londonderry?

December has the shortest days of the year, with an average of 9.1h of daylight.
Average pressure - Londonderry, NH

The month with the highest atmospheric pressure is November (30.07").
The month with the lowest atmospheric pressure is June (29.92").

Average wind speed - Londonderry, NH

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

Average rainfall - Londonderry, NH
Average rainfall days - Londonderry, NH

The month with the highest number of rainy days is June (12.1 days).
The month with the least rainy days is January (4.1 days).

Average snowfall - Londonderry, NH
Average snowfall days - Londonderry, NH

The month with the highest number of snowfall days is January (7.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight / Average sunshine - Londonderry, 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: 10.4h).
The month with the least sunshine is February (Average sunshine: 4.6h).

Average sunshine days - Londonderry, NH

Months with the most sunshine days are January and December (21.3 days).
The month with the least sunshine days is June (16.7 days).

Average UV index - Londonderry, NH
Average visibility - Londonderry, NH

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