January weather forecast and climate
Harrisburg, PA

A church, a mosque, and other buildings along State Street in Harrisburg, Pennsylvania
A church, a mosque, and other buildings along State Street in Harrisburg, Pennsylvania

Weather in January

January, like December, in Harrisburg, Pennsylvania, is a wintry winter month, with average temperature fluctuating between 22.1°F (-5.5°C) and 35.1°F (1.7°C).

Temperature

With an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.1°F (-5.5°C), January is the coldest month.

Humidity

The average relative humidity in Harrisburg, Pennsylvania, is 77%.

Rainfall

January and February are months with the least rain when the rain falls for 5.7 days and typically aggregates up to 0.71" (18mm) of rain.

Snowfall

Months with snowfall in Harrisburg are January through April, November and December. In Harrisburg, in January, during 6.3 snowfall days, 1.18" (30mm) of snow is typically accumulated. In Harrisburg, Pennsylvania, during the entire year, snow falls for 19.9 days, and aggregates up to 4.29" (109mm) of snow.

Daylight

In Harrisburg, the average length of the day is 9.7h.

Sunshine

The average sunshine in Harrisburg, Pennsylvania, is 4.6h.

UV index

Months with the lowest UV index in Harrisburg, Pennsylvania, are January through March, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for average individuals.
Note: The daily maximum UV index of 2 in January interpret into the following advice:
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. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Harrisburg?

The coldest month is January, with an average high-temperature of 35.1°F (1.7°C) and an average low-temperature of 22.1°F (-5.5°C).

What is the temperature in January in Harrisburg?

In January, in Harrisburg, Pennsylvania, the average high-temperature is 35.1°F (1.7°C), and the average low-temperature is 22.1°F (-5.5°C).

What is the average humidity in January in Harrisburg?

The average relative humidity in January in Harrisburg, Pennsylvania, is 77%.

How many days does it rain in January in Harrisburg?

In Harrisburg, Pennsylvania, in January, during 5.7 rainfall days, 0.71" (18mm) of precipitation is typically accumulated.

What is the driest month in Harrisburg?

Months with the least rainfall in Harrisburg, Pennsylvania, are January and February Rain falls for 5.7 days and accumulates 0.71" (18mm) of rain.

How many days does it snow in January in Harrisburg?

In Harrisburg, in January, snow falls for 6.3 days, with typically accumulated 1.18" (30mm) of snow.

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

The average length of the day in January in Harrisburg is 9.7h.

How long on average sun shines in January in Harrisburg?

In January, the average sunshine is 4.6h.

When is the lowest UV index in Harrisburg?

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

What is the UV index intensity in January in Harrisburg?

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

Average temperature in January
Harrisburg, PA

Average temperature in January - Harrisburg, PA
  • Average high temperature in January: 35.1°F

The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (35.1°F).

  • Average low temperature in January: 22.1°F

The month with the highest average low temperature is July (63.5°F).
The coldest month (with the lowest average low temperature) is January (22.1°F).

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Average pressure in January
Harrisburg, PA

Average pressure in January - Harrisburg, PA
  • Average pressure in January: 30.1"

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

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Average wind speed in January
Harrisburg, PA

Average wind speed in January - Harrisburg, PA
  • Average wind speed in January: 8mph

The windiest month (with the highest average wind speed) is March (8.2mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).

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Average humidity in January
Harrisburg, PA

Average humidity in January - Harrisburg, PA
  • Average humidity in January: 77%

The month with the highest relative humidity is February (80%).
Months with the lowest relative humidity are March and April (75%).

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Average rainfall in January
Harrisburg, PA

Average rainfall in January - Harrisburg, PA
  • Average rainfall in January: 0.71"

The wettest month (with the highest rainfall) is August (1.3").
The driest months (with the least rainfall) are January and February (0.71").

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Average rainfall days in January
Harrisburg, PA

Average rainfall days in January - Harrisburg, PA
  • Average rainfall days in January: 5.7 days

The month with the highest number of rainy days is May (13.9 days).
The month with the least rainy days is January (5.7 days).

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Average snowfall in January
Harrisburg, PA

Average snowfall in January - Harrisburg, PA
  • Average snowfall in January: 1.18"

The month with the highest snowfall is February (1.3").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Harrisburg, PA

Average snowfall days in January - Harrisburg, PA
  • Average snowfall days in January: 6.3 days

The month with the highest number of snowfall days is January (6.3 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

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Average daylight in January /
Average sunshine in January
Harrisburg, PA

Average daylight in January / Average sunshine in January - Harrisburg, PA
  • Average daylight in January: 9.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in January: 4.6h

The month with the most sunshine is July (Average sunshine: 10.5h).
The month with the least sunshine is February (Average sunshine: 4.5h).

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Average sunshine days in January
Harrisburg, PA

Average sunshine days in January - Harrisburg, PA
  • Average sunshine days in January: 20.6 days

The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is July (14.1 days).

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Average UV index in January
Harrisburg, PA

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

Months with the highest UV index are May, June and July (UV index 6).
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
Harrisburg, PA

Average cloud cover in January - Harrisburg, PA
  • Average cloud cover in January: 49

Months with the most cloud cover are February and December (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in January
Harrisburg, PA

Average visibility in January - Harrisburg, PA
  • Average visibility in January: 6mi

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

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