January weather - Winter 2025

Weather in January
Frequently asked questions
Average temperature in January
Average pressure in January
Average wind speed in January
Average humidity in January
Average rainfall in January
Average rainfall days in January
Average snowfall in January
Average snowfall days in January
Average daylight in January
Average sunshine in January
Average sunshine days in January
Average UV index in January
Average cloud cover in January
Average visibility in January

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

Weather in January

The year begins with chilly temperatures in Harrisburg, Pennsylvania, bringing crisp air and frosty mornings to the city. Snowfall of 1.18" (30mm) and measures of cold wind gusts of 13mph (20.9km/h) often chill the bones. Locals are used to bundling up, and outdoor activities are often enjoyed despite the cold. With an average of 20.6 sunny days and 9.7 hours of daylight, January can seem cozy and serene. Sights of snow-dusted landscapes make this wintry month a time of scenic beauty.

Temperature

January, with its high-temperature average of 35.1°F (1.7°C) and a low-temperature average of 22.1°F (-5.5°C), is the coldest month in Harrisburg.

Humidity

The average relative humidity in January in Harrisburg 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

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

Daylight

In January, the average length of the day is 9h and 41min.
On the first day of the month, sunrise is at 7:30 am and sunset at 4:51 pm. On the last day of January, sunrise is at 7:17 am and sunset at 5:24 pm EST.

Sunshine

The average sunshine in January is 4.6h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Harrisburg. A UV Index reading of 2, and below, represents a minimal health hazard from unsafe exposure to UV radiation for the average person.
Note: The maximum UV index of 2 during January leads to these instructions:
Extended exposure to the sun should always be avoided by children, infants, and those with sensitive skin. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.

Updated: Jun 4, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What month is the coldest?

The coldest time of the year is January, with temperatures averaging a high of 35.1°F (1.7°C) and a low of 22.1°F (-5.5°C).

How cold is January?

The high-temperature, in January, in Harrisburg, is 35.1°F (1.7°C), while the low-temperature averages to 22.1°F (-5.5°C).

What is the average humidity in January in Harrisburg?

In Harrisburg, the average relative humidity in January is 77%.

What is the driest month?

The months with the least rainfall are January and February Rain falls for 5.7 days and accumulates 0.71" (18mm) of rain.

How much does it rain in January?

In January, the rain falls for 5.7 days. Throughout January, 0.71" (18mm) of precipitation is accumulated.

How much does it snow in Harrisburg in January?

In Harrisburg, in January, during 6.3 snowfall days, 1.18" (30mm) of snow is typically accumulated.

What is the average length of the day in January?

In Harrisburg, the average day length in January is 9h and 41min.

When are sunrise and sunset in January?

In January, on the first day of the month, sunrise is at 7:30 am and sunset at 4:51 pm. On the last day of the month, sunrise is at 7:17 am and sunset at 5:24 pm EST.

How many hours of sunshine does Harrisburg have in January?

In Harrisburg, Pennsylvania, the average sunshine duration in January is 4.6h.

What is the month with the lowest UV index?

The 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 reading in January?

The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

41°F 5°C

35.1°F 1.7°C

38.3°F 3.5°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

8.2mph 13.2km/h

8.7mph 14km/h

8.8mph 14.2km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

20.2

20.6

17.5

Average UV index

Average cloud cover

Average visibility

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).

Average pressure in January
Harrisburg, PA

Average pressure in January: 30.1"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).

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).

Average humidity in January
Harrisburg, PA

Average humidity in January: 77%

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

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").

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).

Average snowfall in January
Harrisburg, PA

Average snowfall in January: 1.18"

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

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).
The months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in January /
Average sunshine in January
Harrisburg, 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: 4h and 4min

The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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).

Average UV index in January
Harrisburg, PA

Average UV index in January: 2

The months with the highest UV index are May, June and July (UV index 6).
The months with the lowest UV index are January, February, March, November and December (UV index 2).

Average cloud cover in January
Harrisburg, PA

Average cloud cover in January: 49

The 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).

Average visibility in January
Harrisburg, PA

Average visibility in January: 6mi

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

January weather forecast
Harrisburg, PA

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