January weather forecast
Dover, NH

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Weather in January

Starting the year, Dover, New Hampshire experiences its coldest month with average high and low temperatures reaching only 31.6°F (-0.2°C) and 20.7°F (-6.3°C) respectively. Aside from its freezing temperatures, January also experiences a significant amount of snowfall amounting to 3.35" (85mm). February also resembles January's weather conditions but with slightly milder temperatures. With the New Hampshire landscape blanketed in snow, the January weather is reminiscent of a winter wonderland, a typical scene in New England towns during this time of year.

Temperature

In Dover, New Hampshire, the lowest temperatures are generally noted in January, averaging a high of 31.6°F (-0.2°C) and a low of 20.7°F (-6.3°C).

Humidity

In Dover, the average relative humidity in January is 79%.

Rainfall

In Dover, in January, during 6.3 rainfall days, 1.5" (38mm) of precipitation is typically accumulated. In Dover, during the entire year, the rain falls for 130.8 days and collects up to 22.24" (565mm) of precipitation.

Snowfall

Months with snowfall are January through April, October through December. In Dover, New Hampshire, during January, snow falls for 7.4 days and regularly aggregates up to 3.35" (85mm) of snow. In Dover, during the entire year, snow falls for 28.5 days and aggregates up to 14.25" (362mm) of snow.

Daylight

The average length of the day in January is 9h and 25min.
On the first day of the month, sunrise is at 7:15 am and sunset at 4:18 pm. On the last day of January, sunrise is at 7:00 am and sunset at 4:53 pm EST.

Sunshine

In January, the average sunshine is 5.1h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for the average person.
Note: A maximum high daily UV index of 2 during January translates into the following directions:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. Sun exposure should be minimized, especially during midday, to avoid harmful UV radiation. During bright days, sunglasses that offer UVA and UVB defense are recommended. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
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Frequently asked questions

What month is the coldest in Dover?

In Dover, January is known for its average lowest temperatures, reaching a high of 31.6°F (-0.2°C) and a low of 20.7°F (-6.3°C).

How cold is January in Dover?

During January, Dover experiences an average high-temperature of 31.6°F (-0.2°C) and a low-temperature of 20.7°F (-6.3°C).

What is the average humidity in January in Dover?

The average relative humidity in January in Dover, New Hampshire, is 79%.

How much does it rain in Dover in January?

In Dover, New Hampshire, in January, during 6.3 rainfall days, 1.5" (38mm) of precipitation is typically accumulated.

How much does it snow in Dover in January?

In Dover, during January, snow falls for 7.4 days and regularly aggregates up to 3.35" (85mm) of snow.

What is the average length of the day in January in Dover?

In January, the average day length is 9h and 25min.

What time are sunrise and sunset in January in Dover?

In January, on the first day of the month, sunrise is at 7:15 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:53 pm EST.

How many hours of sunshine does Dover have in January?

In January, the average sunshine duration is 5.1h.

When is the lowest UV index in Dover?

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

What is the UV index reading in January in Dover?

In Dover, New Hampshire, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health threat from unsafe exposure to Sun's UV rays.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
37°F 2.8°C
31.6°F -0.2°C
33.4°F 0.8°C
Average low temperature
27.5°F -2.5°C
20.7°F -6.3°C
21.9°F -5.6°C
Average pressure
30.03" 763mmHg
29.99" 762mmHg
29.98" 761mmHg
Average wind speed
10.4mph 16.7km/h
11.3mph 18.2km/h
10.9mph 17.5km/h
Average max. wind speed
11.2mph 18km/h
11.9mph 19.2km/h
11.6mph 18.7km/h
Average wind speed gusts
16.6mph 26.7km/h
18mph 29km/h
17.5mph 28.2km/h
Average humidity
78%
79%
79%
Average rainfall
2.13" 54mm
1.5" 38mm
1.65" 42mm
Average rainfall days
8.5
6.3
6.3
Average snowfall
3.27" 83mm
3.35" 85mm
3.86" 98mm
Average snowfall days
5.4
7.4
7.2
Average daylight
9h 0min
9h 2min
10h 3min
Average sunshine
4h 5min
5h 1min
4h 5min
Average sunshine days
18.2
18.4
16.4
Average UV index
2
2
2
Average cloud cover
47%
44%
47%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Dover, NH

Average temperature in January - Dover, NH
  • Average high temperature in January: 31.6°F

The warmest month (with the highest average high temperature) is July (76.3°F).
The month with the lowest average high temperature is January (31.6°F).

  • Average low temperature in January: 20.7°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

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Average pressure in January
Dover, NH

Average pressure in January - Dover, NH
  • Average pressure in January: 29.99"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).

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Average wind speed in January
Dover, NH

Average wind speed in January - Dover, NH
  • Average wind speed in January: 11.3mph

The windiest month (with the highest average wind speed) is January (11.3mph).
The calmest months (with the lowest average wind speed) are July and August (6.5mph).

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Average humidity in January
Dover, NH

Average humidity in January - Dover, NH
  • Average humidity in January: 79%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are April and November (75%).

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Average rainfall in January
Dover, NH

Average rainfall in January - Dover, NH
  • Average rainfall in January: 1.5"

The wettest months (with the highest rainfall) are June and December (2.13").
The driest month (with the least rainfall) is September (1.26").

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Average rainfall days in January
Dover, NH

Average rainfall days in January - Dover, NH
  • Average rainfall days in January: 6.3 days

The month with the highest number of rainy days is July (14.6 days).
The months with the least rainy days are January and February (6.3 days).

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Average snowfall in January
Dover, NH

Average snowfall in January - Dover, NH
  • Average snowfall in January: 3.35"

The month with the highest snowfall is February (3.86").
The months with the least snowfall are May, June, July, August and September (0").

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Average snowfall days in January
Dover, NH

Average snowfall days in January - Dover, NH
  • Average snowfall days in January: 7.4 days

The month with the highest number of snowfall days is January (7.4 days).
The months with the least snowfall days are May, June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Dover, NH
  • Average daylight in January: 9h and 2min

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 0min).

  • Average sunshine in January: 5h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The months with the least sunshine are February and December (Average sunshine: 4h and 54min).

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Average sunshine days in January
Dover, NH

Average sunshine days in January - Dover, NH
  • Average sunshine days in January: 18.4 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is July (14.3 days).

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Average UV index in January
Dover, NH

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

The months with the highest UV index are 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
Dover, NH

Average cloud cover in January - Dover, NH
  • Average cloud cover in January: 44

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in January
Dover, NH

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

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

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Dover, New Hampshire, USA

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