January weather forecast
Rochester, MA

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Weather in January

January, the same as December, is an icy winter month in Rochester, Massachusetts, with an average temperature fluctuating between 36.7°F (2.6°C) and 27.3°F (-2.6°C).

Temperature

Rochester's January weather, with an average high temperature of 36.7°F (2.6°C) and an average low temperature of 27.3°F (-2.6°C), tends to be the coldest of the year.

Humidity

The average relative humidity in January in Rochester is 75%.

Rainfall

In Rochester, during January, the rain falls for 8.5 days and regularly aggregates up to 1.18" (30mm) of precipitation. Throughout the year, in Rochester, there are 136.3 rainfall days, and 15.63" (397mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Rochester are January through May, October through December. In Rochester, in January, snow falls for 6.6 days, with typically accumulated 0.83" (21mm) of snow. In Rochester, Massachusetts, during the entire year, snow falls for 21.6 days and aggregates up to 4.29" (109mm) of snow.

Daylight

In Rochester, the average length of the day in January is 9h and 34min.
On the first day of January, sunrise is at 7:10 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:56 pm EST.

Sunshine

The average sunshine in January in Rochester is 5.1h.

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 reading of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for average individuals.
Note: In January, the maximum UV index of 2 suggests this advice:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
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Frequently asked questions

What month is the coldest in Rochester?

Rochester's January weather reaches an average high of 36.7°F (2.6°C) and an average low of 27.3°F (-2.6°C), making it the coldest month.

How cold is it in Rochester in January?

An average high-temperature, in January, in Rochester, is 36.7°F (2.6°C) and the average low-temperature is 27.3°F (-2.6°C).

What is the average humidity in January in Rochester?

In Rochester, Massachusetts, the average relative humidity in January is 75%.

How many days does it rain in January in Rochester?

In Rochester, Massachusetts, during January, the rain falls for 8.5 days and regularly aggregates up to 1.18" (30mm) of precipitation.

How many days does it snow in January in Rochester?

In Rochester, Massachusetts, in January, during 6.6 snowfall days, 0.83" (21mm) of snow is typically accumulated.

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

The average day length in January in Rochester is 9h and 34min.

When are sunrise and sunset in January in Rochester?

On the first day of January in Rochester, sunrise is at 7:10 am and sunset at 4:23 pm. On the last day of the month, sunrise is at 6:56 am and sunset at 4:56 pm EST.

How long on average sun shines in January in Rochester?

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

When is the lowest UV index in Rochester?

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

How high is the UV index in January in Rochester?

The average daily maximum UV index in January in Rochester, Massachusetts, is 2. A UV Index reading of 2, and below, represents a low health threat from unsafe 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, MA

Average temperature in January - Rochester, MA
  • Average high temperature in January: 36.7°F

The warmest month (with the highest average high temperature) is August (76.6°F).
The month with the lowest average high temperature is January (36.7°F).

  • Average low temperature in January: 27.3°F

The month with the highest average low temperature is August (66.7°F).
The coldest month (with the lowest average low temperature) is January (27.3°F).

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Average pressure in January
Rochester, MA

Average pressure in January - Rochester, MA
  • Average pressure in January: 30"Hg

The month with the highest atmospheric pressure is November (30.06"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
Rochester, MA

Average wind speed in January - Rochester, MA
  • Average wind speed in January: 12.9mph

The windiest month (with the highest average wind speed) is January (12.9mph).
The calmest month (with the lowest average wind speed) is August (8.3mph).

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Average humidity in January
Rochester, MA

Average humidity in January - Rochester, MA
  • Average humidity in January: 75%

The months with the highest relative humidity are June and July (80%).
The months with the lowest relative humidity are March and November (74%).

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Average rainfall in January
Rochester, MA

Average rainfall in January - Rochester, MA
  • Average rainfall in January: 1.18"

The wettest month (with the highest rainfall) is October (1.89").
The driest month (with the least rainfall) is February (0.98").

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Average rainfall days in January
Rochester, MA

Average rainfall days in January - Rochester, MA
  • Average rainfall days in January: 8.5 days

The months with the highest number of rainy days are May and July (14.1 days).
The month with the least rainy days is February (7.7 days).

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Average snowfall in January
Rochester, MA

Average snowfall in January - Rochester, MA
  • Average snowfall in January: 0.83"

The month with the highest snowfall is February (1.1").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Rochester, MA

Average snowfall days in January - Rochester, MA
  • Average snowfall days in January: 6.6 days

The month with the highest number of snowfall days is January (6.6 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, MA

Average daylight in January / Average sunshine in January - Rochester, MA
  • Average daylight in January: 9h and 4min

The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in January: 5h and 1min

The month with the most sunshine is August (Average sunshine: 10h and 42min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).

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Average sunshine days in January
Rochester, MA

Average sunshine days in January - Rochester, MA
  • Average sunshine days in January: 16.8 days

The month with the most sunshine days is December (17.7 days).
The month with the least sunshine days is April (14.3 days).

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Average UV index in January
Rochester, MA

Average UV index in January - Rochester, MA
  • 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
Rochester, MA

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

The month with the most cloud cover is March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 28).

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Average visibility in January
Rochester, MA

Average visibility in January - Rochester, MA
  • 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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Rochester, Massachusetts, USA

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