January weather forecast
Rochester, NH

Weather in January

January, the same as December, in Rochester, New Hampshire, is a freezing cold winter month, with an average temperature varying between 17.4°F (-8.1°C) and 29.7°F (-1.3°C).

Temperature

January is the coldest month, with an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 17.4°F (-8.1°C).

Humidity

January and February, with an average relative humidity of 82%, are the most humid months in Rochester.

Rainfall

In January, in Rochester, the rain falls for 7.6 days. Throughout January, 2.28" (58mm) of precipitation is accumulated. Throughout the year, in Rochester, there are 143.1 rainfall days, and 29.06" (738mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Rochester are January through May, October through December. In Rochester, during January, snow falls for 10.4 days and regularly aggregates up to 6.26" (159mm) of snow. Throughout the year, there are 40 snowfall days, and 27.8" (706mm) of snow is accumulated.

Daylight

In January, the average length of the day is 9h and 25min.
On the first day of the month, sunrise is at 7:16 am and sunset at 4:18 pm. On the last day of January, in Rochester, sunrise is at 7:00 am and sunset at 4:54 pm EST.

Sunshine

In Rochester, the average sunshine in January is 5h.

UV index

The months with the lowest UV index in Rochester are January through March, November and December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from exposure to the Sun's UV rays for average individuals.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
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. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. 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 Rochester?

With an average high-temperature of 29.7°F (-1.3°C) and an average low-temperature of 17.4°F (-8.1°C), January is the coldest month in Rochester, New Hampshire.

What is the temperature in January in Rochester?

In Rochester, in January, the average high-temperature is 29.7°F (-1.3°C), and the average low-temperature is 17.4°F (-8.1°C).

What is the most humid month in Rochester?

The months with the highest humidity in Rochester, New Hampshire, are January and February, with an average relative humidity of 82%.

What is the average humidity in January in Rochester?

The average relative humidity in January in Rochester, New Hampshire, is 82%.

How much does it rain in Rochester in January?

In January, in Rochester, the rain falls for 7.6 days. Throughout January, 2.28" (58mm) of precipitation is accumulated.

How much does it snow in Rochester in January?

In January, in Rochester, New Hampshire, it is snowing for 10.4 days. Throughout January, 6.26" (159mm) of snow is accumulated.

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

The average day length in January in Rochester, New Hampshire, is 9h and 25min.

What time are sunrise and sunset in January in Rochester?

In January, on the first day of the month, sunrise is at 7:16 am and sunset at 4:18 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 4:54 pm EST.

How long on average sun shines in January in Rochester?

In January, the average sunshine duration in Rochester is 5h.

When is the lowest UV index in Rochester?

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

What is the UV index intensity in January in Rochester?

In January, the average daily maximum UV index in Rochester, New Hampshire, is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability 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
Rochester, NH

Average temperature in January - Rochester, NH
  • Average high temperature in January: 29.7°F

The warmest month (with the highest average high temperature) is July (78.3°F).
The month with the lowest average high temperature is January (29.7°F).

  • Average low temperature in January: 17.4°F

The month with the highest average low temperature is July (60.3°F).
The coldest month (with the lowest average low temperature) is January (17.4°F).

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Average pressure in January
Rochester, NH

Average pressure in January - Rochester, 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
Rochester, NH

Average wind speed in January - Rochester, NH
  • Average wind speed in January: 9.3mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest months (with the lowest average wind speed) are July and August (5.5mph).

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Average humidity in January
Rochester, NH

Average humidity in January - Rochester, NH
  • Average humidity in January: 82%

The months with the highest relative humidity are January and February (82%).
The month with the lowest relative humidity is April (75%).

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Average rainfall in January
Rochester, NH

Average rainfall in January - Rochester, NH
  • Average rainfall in January: 2.28"

The wettest months (with the highest rainfall) are October and December (3.11").
The driest month (with the least rainfall) is September (1.5").

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Average rainfall days in January
Rochester, NH

Average rainfall days in January - Rochester, NH
  • Average rainfall days in January: 7.6 days

The month with the highest number of rainy days is May (15.1 days).
The month with the least rainy days is February (6.8 days).

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Average snowfall in January
Rochester, NH

Average snowfall in January - Rochester, NH
  • Average snowfall in January: 6.26"

The month with the highest snowfall is December (6.69").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Rochester, NH

Average snowfall days in January - Rochester, NH
  • Average snowfall days in January: 10.4 days

The month with the highest number of snowfall days is January (10.4 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
Rochester, NH

Average daylight in January / Average sunshine in January - Rochester, NH
  • Average daylight in January: 9h and 25min

The month with the longest days is June (Average daylight: 15h and 20min).
The month with the shortest days is December (Average daylight: 9h and 2min).

  • Average sunshine in January: 5h and 0min

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 42min).

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Average sunshine days in January
Rochester, NH

Average sunshine days in January - Rochester, NH
  • Average sunshine days in January: 16.3 days

The month with the most sunshine days is November (16.9 days).
The month with the least sunshine days is April (13.3 days).

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Average UV index in January
Rochester, NH

Average UV index in January - Rochester, 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
Rochester, NH

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

The month with the most cloud cover is March (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 32).

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Average visibility in January
Rochester, NH

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

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

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