January weather forecast
Londonderry, NH

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Weather in January

January is distinguished by its chill, making it one of Londonderry's coldest months of the year. Even though this month strays far from the summer's heat, frequent snowfall does soften the winter days. This snowy atmosphere is accompanied by a relatively low daylight duration of 9.4 hours. Most notably, January features the lowest temperature scale of 18°F (-7.8°C) to 30.6°F (-0.8°C), often leaving residents bundled up, within the cozy warmth of their homes. The shift into February promises slightly warmer conditions, dispersing dreams of white landscapes for another year.

Temperature

The month of January, characterized by an average high of 30.6°F (-0.8°C) and a low of 18°F (-7.8°C), is recognized as the coldest in Londonderry.

Humidity

The average relative humidity in January is 80%.

Rainfall

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

Snowfall

January through May, October through December are months with snowfall in Londonderry. 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 is 9h and 27min.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:21 pm. On the last day of January, in Londonderry, New Hampshire, sunrise is at 7:01 am and sunset at 4:56 pm EST.

Sunshine

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

UV index

The months with the lowest UV index in Londonderry are January through March, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for average individuals.
Note: In January, the maximum UV index of 2 translates into these guidelines:
Despite most people tolerating extended sun exposure, it is critical to always protect those with sensitive skin, infants, and children. Protect yourself from the midday Sun's peak UV radiation by minimizing exposure. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. On your guard! Snow's reflection can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What month is the coldest in Londonderry?

The coldest period tends to be January, when average temperatures fluctuate between a high of 30.6°F (-0.8°C) and a low of 18°F (-7.8°C).

How cold is January in Londonderry?

An average high-temperature, in January, in Londonderry, 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, New Hampshire, is 80%.

What is the driest month in Londonderry?

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

How many days does it rain in January in Londonderry?

In Londonderry, in January, it is raining for 4.1 days, with typically 0.75" (19mm) of accumulated precipitation.

How many days does it snow in January in Londonderry?

In Londonderry, New Hampshire, in January, during 7.1 snowfall days, 2.4" (61mm) of snow is typically accumulated.

How many hours of daylight does Londonderry have in January?

In January, the average day length in Londonderry, New Hampshire, is 9h and 27min.

What time are sunrise and sunset in January in Londonderry?

On the first day of January in Londonderry, sunrise is at 7:16 am and sunset at 4:21 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 4:56 pm EST.

How many hours of sunshine does Londonderry have in January?

The average sunshine duration in January in Londonderry is 5.1h.

When is the lowest UV index in Londonderry?

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

How high is the UV index in January in Londonderry?

The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk 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 3min

The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).

  • Average sunshine in January: 5h and 1min

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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Londonderry, New Hampshire, USA

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