January weather forecast and climate
Hanover, NH

January, like December, is another subzero cold winter month in Hanover, New Hampshire, with average temperature fluctuating between 25°F (-3.9°C) and 12.6°F (-10.8°C).

Temperature

With an average high-temperature of 25°F (-3.9°C) and an average low-temperature of 12.6°F (-10.8°C), January is the coldest month.

Humidity

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

Rainfall

In Hanover, New Hampshire, it is raining for 8.9 days, with typically 2.05" (52mm) of accumulated precipitation. Throughout the year, there are 156.9 rainfall days, and 28.23" (717mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Hanover. In Hanover, during 16.5 snowfall days, 8.39" (213mm) of snow is typically accumulated. In Hanover, New Hampshire, during the entire year, snow falls for 75.5 days, and aggregates up to 40.83" (1037mm) of snow.

Daylight

The average length of the day in January is 9.4h.

Sunshine

In January, the average sunshine is 3.8h.

UV index

In Hanover, New Hampshire, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a low threat to health from unprotected exposure to the Sun's UV rays for the ordinary person.
Note: The average daily UV index of 2 transform into the following instructions:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Hanover?

January is the coldest month, with an average high-temperature of 25°F (-3.9°C) and an average low-temperature of 12.6°F (-10.8°C).

What is the temperature in January in Hanover?

In Hanover, in January, the average high-temperature is 25°F (-3.9°C), and the average low-temperature is 12.6°F (-10.8°C).

What are the most humid months in Hanover?

January and February, with an average relative humidity of 86%, are most humid months.

What is the average humidity in January in Hanover?

In Hanover, New Hampshire, the average relative humidity in January is 86%.

How many days does it rain in January in Hanover?

In Hanover, New Hampshire, in January, during 8.9 rainfall days, 2.05" (52mm) of precipitation is typically accumulated.

How many days does it snow in January in Hanover?

In Hanover, in January, during 16.5 snowfall days, 8.39" (213mm) of snow is typically accumulated.

How many hours of daylight does Hanover have in January?

In Hanover, New Hampshire, the average length of the day in January is 9.4h.

How long on average sun shines in January in Hanover?

In Hanover, New Hampshire, the average sunshine in January is 3.8h.

What is the UV index intensity in January in Hanover?

In January, the average daily maximum UV index in Hanover is 2. A UV Index reading of 2, and below, represents a low health risk from the exposure to the Sun's UV rays.
Average temperature in January - Hanover, NH
  • Average high temperature in January: -3.9°C

The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-3.9°C).

  • Average low temperature in January: -10.8°C

The month with the highest average low temperature is July (13.6°C).
The coldest month (with the lowest average low temperature) is January (-10.8°C).

Average pressure in January - Hanover, NH
  • Average pressure in January: 1016.5mbar

The month with the highest atmospheric pressure is November (1018.3mbar).
The month with the lowest atmospheric pressure is June (1013mbar).

Average wind speed in January - Hanover, NH
  • Average wind speed in January: 11.6km/h

The windiest month (with the highest average wind speed) is April (11.9km/h).
The calmest month (with the lowest average wind speed) is August (7.8km/h).

Average humidity in January - Hanover, NH
  • Average humidity in January: 86%

Months with the highest relative humidity are January and February (86%).
The month with the lowest relative humidity is May (75%).

Average rainfall in January - Hanover, NH
  • Average rainfall in January: 52mm

The wettest month (with the highest rainfall) is October (76mm).
The driest month (with the least rainfall) is September (47mm).

Average rainfall days in January - Hanover, NH
  • Average rainfall days in January: 8.9 days

The month with the highest number of rainy days is July (17.2 days).
The month with the least rainy days is February (7.9 days).

Average snowfall in January - Hanover, NH
  • Average snowfall in January: 213mm

The month with the highest snowfall is February (294mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in January - Hanover, NH
  • Average snowfall days in January: 16.5 days

The month with the highest number of snowfall days is January (16.5 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Hanover, NH
  • Average daylight in January: 9.4h

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

  • Average sunshine in January: 3.8h

The month with the most sunshine is August (Average sunshine: 10.1h).
The month with the least sunshine is February (Average sunshine: 3.6h).

Average sunshine days in January - Hanover, NH
  • Average sunshine days in January: 11.8 days

The month with the most sunshine days is September (17.2 days).
The month with the least sunshine days is February (9.8 days).

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

Months with the highest UV index are May, June, July and August (UV index 5).
Months with the lowest UV index are February and December (UV index 1).

Average cloud cover in January - Hanover, NH
  • Average cloud cover in January: 60

The month with the most cloud cover is February (Cloud cover 62).
The month with the least cloud cover is August (Cloud cover 37).

Average visibility in January - Hanover, NH
  • Average visibility in January: 7km

Months with the highest visibility are April, May, June, July, August, October, November and December (8km).
Months with the lowest visibility are January, February, March and September (7km).