January weather forecast
Londonderry, NH

Weather in January

January, like December, is a freezing cold winter month in Londonderry, New Hampshire, with an average temperature ranging between max 30.6°F (-0.8°C) and min 18°F (-7.8°C).

Temperature

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

Humidity

The average relative humidity in January in Londonderry is 80%.

Rainfall

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

Snowfall

Months with snowfall are January through May, October through December. In Londonderry, during January, snow falls for 7.1 days and regularly aggregates up to 2.4" (61mm) of snow. Throughout the year, there are 26.1 snowfall days, and 11.54" (293mm) of snow is accumulated.

Daylight

In January, the average length of the day in Londonderry is 9h and 27min.
On the first day of January in Londonderry, sunrise is at 7:16 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:57 pm EST.

Sunshine

In January, the average sunshine in Londonderry is 5.1h.

UV index

The months with the lowest UV index are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for the average person.
Note: The average daily UV index of 2 in January transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the coldest month in Londonderry?

The coldest month in Londonderry, New Hampshire, 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).

What is the temperature in January in Londonderry?

In January, in Londonderry, New Hampshire, the average high-temperature is 30.6°F (-0.8°C), and the average low-temperature is 18°F (-7.8°C).

What is the average humidity in January in Londonderry?

The average relative humidity in January in Londonderry is 80%.

What is the driest month in Londonderry?

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

How much does it rain in Londonderry in January?

In Londonderry, New Hampshire, in January, during 4.1 rainfall days, 0.75" (19mm) of precipitation is typically accumulated.

How many days does it snow in January in Londonderry?

In Londonderry, during January, snow falls for 7.1 days and regularly aggregates up to 2.4" (61mm) of snow.

How many hours of daylight does Londonderry have in January?

The average day length in January in Londonderry is 9h and 27min.

When is the sunrise / sunset in January in Londonderry?

On the first day of January in Londonderry, New Hampshire, sunrise is at 7:16 am and sunset at 4:22 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:57 pm EST.

How many hours of sunshine does Londonderry have in January?

In January, the average sunshine duration in Londonderry, New Hampshire, is 5.1h.

When is the lowest UV index in Londonderry?

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

What is the UV index reading in January in Londonderry?

In Londonderry, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Londonderry, NH

Average temperature in January - Londonderry, NH
  • Average high temperature in January: 30.6°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (30.6°F).

  • Average low temperature in January: 18°F

The month with the highest average low temperature is July (61°F).
The coldest month (with the lowest average low temperature) is January (18°F).

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Average pressure in January
Londonderry, NH

Average pressure in January - Londonderry, NH
  • Average pressure in January: 30.01"Hg

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

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Average wind speed in January
Londonderry, NH

Average wind speed in January - Londonderry, NH
  • Average wind speed in January: 8.3mph

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).

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Average humidity in January
Londonderry, NH

Average humidity in January - Londonderry, NH
  • Average humidity in January: 80%

The month with the highest relative humidity is February (81%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in January
Londonderry, NH

Average rainfall in January - Londonderry, NH
  • Average rainfall in January: 0.75"

The wettest month (with the highest rainfall) is October (1.38").
The driest month (with the least rainfall) is January (0.75").

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Average rainfall days in January
Londonderry, NH

Average rainfall days in January - Londonderry, NH
  • Average rainfall days in January: 4.1 days

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).

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Average snowfall in January
Londonderry, NH

Average snowfall in January - Londonderry, NH
  • Average snowfall in January: 2.4"

The month with the highest snowfall is December (2.99").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Londonderry, NH

Average snowfall days in January - Londonderry, NH
  • Average snowfall days in January: 7.1 days

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

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Average daylight in January /
Average sunshine in January
Londonderry, NH

Average daylight in January / Average sunshine in January - Londonderry, NH
  • Average daylight in January: 9h and 27min

The month with the longest days is June (Average daylight: 15h and 17min).
The month with the shortest days is December (Average daylight: 9h and 5min).

  • Average sunshine in January: 5h and 6min

The month with the most sunshine is August (Average sunshine: 10h and 24min).
The month with the least sunshine is February (Average sunshine: 4h and 36min).

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Average sunshine days in January
Londonderry, NH

Average sunshine days in January - Londonderry, NH
  • Average sunshine days in January: 21.3 days

The 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).

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Average UV index in January
Londonderry, NH

Average UV index in January - Londonderry, NH
  • Average UV index in January: 2

The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

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Average cloud cover in January
Londonderry, NH

Average cloud cover in January - Londonderry, NH
  • Average cloud cover in January: 45

The month with the most cloud cover is March (Cloud cover 51).
The month with the least cloud cover is August (Cloud cover 33).

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Average visibility in January
Londonderry, NH

Average visibility in January - Londonderry, NH
  • Average visibility in January: 6mi

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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