Harrisburg
Pennsylvania, USA
Long-term weather forecast
Long-term weather forecast

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
January, like December, in Harrisburg, Pennsylvania, is a wintry winter month, with average temperature ranging between min 22.8°F (-5.1°C) and max 37°F (2.8°C).

Temperature

With an average high-temperature of 37°F (2.8°C) and an average low-temperature of 22.8°F (-5.1°C), January is the coldest month.

Humidity

In Harrisburg, the average relative humidity in January is 64.4%.

Rainfall

In Harrisburg, Pennsylvania, during January, the rain falls for 10.6 days and regularly aggregates up to 2.9" (73.2mm) of precipitation. Throughout the year, in Harrisburg, there are 122 rainfall days, and 40.7" (1034.8mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through April, November and December. In January, it is snowing for 5.2 days. Throughout January, 8.8" (223.5mm) of snow is accumulated. Throughout the year, in Harrisburg, there are 16.8 snowfall days, and 30.6" (777.2mm) of snow is accumulated.

Daylight

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

Sunshine

The average sunshine in January is 5h.

UV index

Months with the lowest UV index are January, November and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health hazard from unsafe exposure to the UV radiation for the average person.
Note: The average daily UV index of 2 transform into the following instructions:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Harrisburg?

January is the coldest month, with an average high-temperature of 37°F (2.8°C) and an average low-temperature of 22.8°F (-5.1°C).

What is the temperature in January in Harrisburg?

In Harrisburg, Pennsylvania, in January, the average high-temperature is 37°F (2.8°C), and the average low-temperature is 22.8°F (-5.1°C).

What is the average humidity in January in Harrisburg?

The average relative humidity in January in Harrisburg is 64.4%.

How much does it rain in Harrisburg in January?

In Harrisburg, Pennsylvania, in January, it is raining for 10.6 days, with typically 2.9" (73.2mm) of accumulated precipitation.

How many days does it snow in January in Harrisburg?

In January, in Harrisburg, Pennsylvania, it is snowing for 5.2 days. Throughout January, 8.8" (223.5mm) of snow is accumulated.

How many hours of daylight does Harrisburg have in January?

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

How many hours of sunshine does Harrisburg have in January?

In January, the average sunshine in Harrisburg, Pennsylvania, is 5h.

What is the month with the lowest UV index in Harrisburg?

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

What is the UV index reading in January in Harrisburg?

In January, the average daily maximum UV index in Harrisburg, Pennsylvania, is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unsafe exposure to the Sun's UV rays.
Average temperature in January - Harrisburg, PA
  • Average high temperature in January: 37°F

The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in January: 22.8°F

The month with the highest average low temperature is July (66.3°F).
The coldest month (with the lowest average low temperature) is January (22.8°F).

Average humidity in January - Harrisburg, PA
  • Average humidity in January: 64.4%

The month with the highest relative humidity is September (73.8%).
The month with the lowest relative humidity is April (59.2%).

Average rainfall in January - Harrisburg, PA
  • Average rainfall in January: 2.9"

The wettest month (with the highest rainfall) is July (4.6").
The driest month (with the lowest rainfall) is February (2.4").

Average rainfall days in January - Harrisburg, PA
  • Average rainfall days in January: 10.6 days

The month with the highest number of rainy days is May (12.2 days).
The month with the lowest number of rainy days is October (8.8 days).

Average snowfall in January - Harrisburg, PA
  • Average snowfall in January: 8.8"

The month with the highest snowfall is February (10.5").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in January - Harrisburg, PA
  • Average snowfall days in January: 5.2 days

The month with the highest number of snowfall days is January (5.2 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

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 shortest days is December (Average daylight: 9.4h).

  • Average sunshine in January: 5h

The month with most sunshine is July (Average sunshine: 10h).
The month with least sunshine is December (Average sunshine: 4.1h).

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

Months with the highest UV index are June and July (UV index 9).
Months with the lowest UV index are January, November and December (UV index 2).