January weather forecast
Portland, PA

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Weather in January

January, the same as December, is a wintry winter month in Portland, Pennsylvania, with an average temperature varying between 20.3°F (-6.5°C) and 32.9°F (0.5°C).

Temperature

January brings the lowest temperatures, with an average high of 32.9°F (0.5°C) and an average low of 20.3°F (-6.5°C).

Humidity

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

Rainfall

In Portland, in January, during 5.8 rainfall days, 1.57" (40mm) of precipitation is typically accumulated. Throughout the year, in Portland, there are 135.7 rainfall days, and 23.74" (603mm) of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In Portland, in January, during 8.2 snowfall days, 3.62" (92mm) of snow is typically accumulated. Throughout the year, there are 33.7 snowfall days, and 16.65" (423mm) of snow is accumulated.

Daylight

The average length of the day in January is 9h and 38min.
On the first day of January, sunrise is at 7:24 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:15 pm EST.

Sunshine

In Portland, the average sunshine in January is 4.6h.

UV index

In Portland, the average daily maximum UV index in January is 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for average individuals.
Note: The UV index of 2 during January leads to these advisories:
While extended sun exposure does not significantly affect most people, those with sensitive skin, children, and infants should always be protected. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. In bright sunlight, prioritize sunglasses that grant protection from UVA and UVB radiation. Bear in mind! The Sun's UV radiation can nearly double in intensity due to the reflective quality of snow.
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Frequently asked questions

What part of the year is the coldest in Portland?

The coldest temperatures occur during January, when averages reach a peak of 32.9°F (0.5°C) and a low of 20.3°F (-6.5°C).

How cold is it in Portland in January?

In Portland, 32.9°F (0.5°C) is the average high-temperature and 20.3°F (-6.5°C) is the average low-temperature during January.

What is the average humidity in January in Portland?

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

How many days does it rain in January in Portland?

In January, in Portland, Pennsylvania, the rain falls for 5.8 days. Throughout January, 1.57" (40mm) of precipitation is accumulated.

How much does it snow in Portland in January?

In Portland, Pennsylvania, in January, snow falls for 8.2 days, with typically accumulated 3.62" (92mm) of snow.

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

In January, the average day length in Portland is 9h and 38min.

When is the sunrise / sunset in January in Portland?

On the first day of January in Portland, Pennsylvania, sunrise is at 7:24 am and sunset at 4:42 pm. On the last day of the month, sunrise is at 7:11 am and sunset at 5:15 pm EST.

How long on average sun shines in January in Portland?

The average sunshine duration in January in Portland, Pennsylvania, is 4.6h.

What is the UV index intensity in January in Portland?

In Portland, Pennsylvania, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Portland, PA

Average temperature in January - Portland, PA
  • Average high temperature in January: 32.9°F

The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in January: 20.3°F

The month with the highest average low temperature is July (61.9°F).
The coldest month (with the lowest average low temperature) is January (20.3°F).

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Average pressure in January
Portland, PA

Average pressure in January - Portland, PA
  • Average pressure in January: 30.07"Hg

The month with the highest atmospheric pressure is November (30.11"Hg).
The month with the lowest atmospheric pressure is June (29.94"Hg).

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Average wind speed in January
Portland, PA

Average wind speed in January - Portland, PA
  • Average wind speed in January: 7.8mph

The windiest month (with the highest average wind speed) is March (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.9mph).

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Average humidity in January
Portland, PA

Average humidity in January - Portland, PA
  • Average humidity in January: 79%

The months with the highest relative humidity are February and December (82%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in January
Portland, PA

Average rainfall in January - Portland, PA
  • Average rainfall in January: 1.57"

The wettest month (with the highest rainfall) is July (2.48").
The driest month (with the least rainfall) is September (1.22").

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Average rainfall days in January
Portland, PA

Average rainfall days in January - Portland, PA
  • Average rainfall days in January: 5.8 days

The month with the highest number of rainy days is May (15.5 days).
The month with the least rainy days is January (5.8 days).

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Average snowfall in January
Portland, PA

Average snowfall in January - Portland, PA
  • Average snowfall in January: 3.62"

The month with the highest snowfall is March (3.82").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Portland, PA

Average snowfall days in January - Portland, PA
  • Average snowfall days in January: 8.2 days

The month with the highest number of snowfall days is February (8.5 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
Portland, PA

Average daylight in January / Average sunshine in January - Portland, PA
  • Average daylight in January: 9h and 4min

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

  • Average sunshine in January: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 4h and 12min).

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Average sunshine days in January
Portland, PA

Average sunshine days in January - Portland, PA
  • Average sunshine days in January: 19.1 days

The month with the most sunshine days is November (19.2 days).
The month with the least sunshine days is July (13.3 days).

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Average UV index in January
Portland, PA

Average UV index in January - Portland, PA
  • Average UV index in January: 2

The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is December (UV index 1).

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Average cloud cover in January
Portland, PA

Average cloud cover in January - Portland, PA
  • Average cloud cover in January: 50

The month with the most cloud cover is February (Cloud cover 53).
The month with the least cloud cover is July (Cloud cover 37).

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Average visibility in January
Portland, PA

Average visibility in January - Portland, PA
  • Average visibility in January: 5mi

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

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Portland, Pennsylvania, USA

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