January weather forecast
Penn, PA

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Weather in January

January, like December, in Penn, Pennsylvania, is a wintry winter month, with an average temperature fluctuating between 32.9°F (0.5°C) and 20.5°F (-6.4°C).

Temperature

The coldest period is January, when temperatures fluctuate between an average high of 32.9°F (0.5°C) and a low of 20.5°F (-6.4°C).

Humidity

January and February, with an average relative humidity of 85%, are the most humid months in Penn.

Rainfall

In Penn, in January, during 9.5 rainfall days, 2.6" (66mm) of precipitation is typically accumulated. In Penn, during the entire year, the rain falls for 183.8 days and collects up to 35.16" (893mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall in Penn. The month with the most snowfall in Penn, Pennsylvania, is January, when snow falls for 18.2 days and typically aggregates up to 7.05" (179mm) of snow.

Daylight

The average length of the day in January in Penn is 9h and 41min.
On the first day of January, sunrise is at 7:41 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:35 pm EST.

Sunshine

January has the least sunshine of the year in Penn, with an average of 2.9h of sunshine.

UV index

In Penn, Pennsylvania, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: The UV index of 2 during January translates into the following guidance:
While many people can endure lengthy sun exposure, it remains imperative to safeguard babies, children, and fair-skinned individuals. Avoiding the Sun's peak radiation during midday hours is essential for health and safety. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
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Frequently asked questions

What part of the year is the coldest in Penn?

January, having an average high-temperature of 32.9°F (0.5°C) and an average low-temperature of 20.5°F (-6.4°C), is the coldest month in Penn.

How cold is January in Penn?

The high-temperature, in January, in Penn, is 32.9°F (0.5°C), while the low-temperature averages to 20.5°F (-6.4°C).

What is the most humid month in Penn?

The months with the highest humidity in Penn are January and February, with an average relative humidity of 85%.

What is the average humidity in January in Penn?

In Penn, Pennsylvania, the average relative humidity in January is 85%.

How many days does it rain in January in Penn?

In January, in Penn, Pennsylvania, the rain falls for 9.5 days. Throughout January, 2.6" (66mm) of precipitation is accumulated.

When does it snow the most in Penn?

January is the month with the most snowfall in Penn. Snow falls for 18.2 days and accumulates 7.05" (179mm) of snow.

How many days does it snow in January in Penn?

In January, in Penn, it is snowing for 18.2 days. Throughout January, 7.05" (179mm) of snow is accumulated.

How many hours of daylight does Penn have in January?

The average day length in January is 9h and 41min.

When is the sunrise / sunset in January in Penn?

On the first day of January in Penn, sunrise is at 7:41 am and sunset at 5:02 pm. On the last day of the month, sunrise is at 7:28 am and sunset at 5:35 pm EST.

What is the month with the least sunshine in Penn?

The month with the least sunshine in Penn is January, with an average of 2.9h of sunshine.

How long on average sun shines in January in Penn?

The average sunshine duration in January in Penn, Pennsylvania, is 2.9h.

How high is the UV index in January in Penn?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from unprotected exposure to UV radiation.
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
Penn, PA

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

The warmest month (with the highest average high temperature) is July (82.6°F).
The month with the lowest average high temperature is January (32.9°F).

  • Average low temperature in January: 20.5°F

The month with the highest average low temperature is July (61.2°F).
The coldest month (with the lowest average low temperature) is January (20.5°F).

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Average pressure in January
Penn, PA

Average pressure in January - Penn, PA
  • Average pressure in January: 30.11"Hg

The month with the highest atmospheric pressure is November (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

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Average wind speed in January
Penn, PA

Average wind speed in January - Penn, PA
  • Average wind speed in January: 8.3mph

The windiest month (with the highest average wind speed) is January (8.3mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in January
Penn, PA

Average humidity in January - Penn, PA
  • Average humidity in January: 85%

The months with the highest relative humidity are January and February (85%).
The months with the lowest relative humidity are April, July and August (77%).

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Average rainfall in January
Penn, PA

Average rainfall in January - Penn, PA
  • Average rainfall in January: 2.6"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is November (2.09").

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Average rainfall days in January
Penn, PA

Average rainfall days in January - Penn, PA
  • Average rainfall days in January: 9.5 days

The month with the highest number of rainy days is May (20.1 days).
The month with the least rainy days is January (9.5 days).

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Average snowfall in January
Penn, PA

Average snowfall in January - Penn, PA
  • Average snowfall in January: 7.05"

The month with the highest snowfall is January (7.05").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Penn, PA

Average snowfall days in January - Penn, PA
  • Average snowfall days in January: 18.2 days

The month with the highest number of snowfall days is January (18.2 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
Penn, PA

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

The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 24min).

  • Average sunshine in January: 2h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

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Average sunshine days in January
Penn, PA

Average sunshine days in January - Penn, PA
  • Average sunshine days in January: 7 days

The month with the most sunshine days is November (14 days).
The month with the least sunshine days is February (6.7 days).

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Average UV index in January
Penn, PA

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

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

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Average cloud cover in January
Penn, PA

Average cloud cover in January - Penn, PA
  • Average cloud cover in January: 70

The month with the most cloud cover is January (Cloud cover 70).
The month with the least cloud cover is August (Cloud cover 34).

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Average visibility in January
Penn, PA

Average visibility in January - Penn, PA
  • Average visibility in January: 4mi

The month with the highest visibility is April (6mi).
The months with the lowest visibility are January and February (4mi).

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Penn, Pennsylvania, USA

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