January weather forecast
Lancaster, PA

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The city of Lancaster, Pennsylvania, in a stunning early morning panorama
The city of Lancaster, Pennsylvania, in a stunning early morning panorama

Weather in January

January in Lancaster, Pennsylvania witnesses the coldest temperatures of the year. The cold snap continues from the previous month with temperatures dipping to a low of 23.2°F (-4.9°C), with daylight lasting only for around 9.7 hours. Occasional snowfall may be anticipated as frozen precipitation is common during this period. With high relative humidity, the landscape often shimmers with morning frost on clear days. Winter conditions require comprehensive layering and insulation for outdoor activities.

Temperature

Lancaster's January weather, marked by an average high temperature of 35.4°F (1.9°C) and an average low temperature of 23.2°F (-4.9°C), is the coldest in the year.

Humidity

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

Rainfall

In Lancaster, during January, the rain falls for 8.6 days and regularly aggregates up to 1.97" (50mm) of precipitation. Throughout the year, there are 153.4 rainfall days, and 28.27" (718mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Lancaster, Pennsylvania, are January through April, November and December. In Lancaster, during January, snow falls for 6.8 days and regularly aggregates up to 3.15" (80mm) of snow. Throughout the year, there are 20.8 snowfall days, and 11.46" (291mm) of snow is accumulated.

Daylight

In Lancaster, the average length of the day in January is 9h and 43min.
On the first day of January in Lancaster, sunrise is at 7:27 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:22 pm EST.

Sunshine

The average sunshine in January is 4.7h.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Lancaster. A UV Index estimate of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: In January, a regular UV index of 2 translates into these guidelines:
Sun exposure does not present considerable issues for many, yet infants, fair-skinned people, and children necessitate constant protection. Around midday, solar radiation is most harmful; hence, exposure should be limited. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Mark this! Snow reflection can nearly double the UV radiation intensity from the Sun.
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Frequently asked questions

What part of the year is the coldest in Lancaster?

In Lancaster, January is the coldest month, with temperatures averaging a high of 35.4°F (1.9°C) and a low of 23.2°F (-4.9°C).

How cold is January in Lancaster?

The high-temperature, in January, in Lancaster, is 35.4°F (1.9°C), while the low-temperature averages to 23.2°F (-4.9°C).

What is the average humidity in January in Lancaster?

In January, the average relative humidity is 77%.

How many days does it rain in January in Lancaster?

In Lancaster, in January, it is raining for 8.6 days, with typically 1.97" (50mm) of accumulated precipitation.

How many days does it snow in January in Lancaster?

In Lancaster, Pennsylvania, in January, during 6.8 snowfall days, 3.15" (80mm) of snow is typically accumulated.

How many hours of daylight does Lancaster have in January?

The average day length in January in Lancaster is 9h and 43min.

When are sunrise and sunset in January in Lancaster?

On the first day of January, sunrise is at 7:27 am and sunset at 4:50 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 5:22 pm EST.

How long on average sun shines in January in Lancaster?

In January, the average sunshine duration in Lancaster, Pennsylvania, is 4.7h.

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

The months with the lowest UV index in Lancaster, Pennsylvania, are January, February, November and December, with an average maximum UV index of 2.

How high is the UV index in January in Lancaster?

The average daily maximum UV index in January in Lancaster, Pennsylvania, is 2. A UV Index of 2, and less, symbolizes a low health threat 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
Lancaster, PA

Average temperature in January - Lancaster, PA
  • Average high temperature in January: 35.4°F

The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (35.4°F).

  • Average low temperature in January: 23.2°F

The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (23.2°F).

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Average pressure in January
Lancaster, PA

Average pressure in January - Lancaster, 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 (29.94"Hg).

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Average wind speed in January
Lancaster, PA

Average wind speed in January - Lancaster, PA
  • Average wind speed in January: 8.9mph

The windiest month (with the highest average wind speed) is March (9mph).
The calmest month (with the lowest average wind speed) is August (5.1mph).

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Average humidity in January
Lancaster, PA

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

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is April (76%).

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Average rainfall in January
Lancaster, PA

Average rainfall in January - Lancaster, PA
  • Average rainfall in January: 1.97"

The wettest month (with the highest rainfall) is August (3.35").
The driest months (with the least rainfall) are February and September (1.89").

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Average rainfall days in January
Lancaster, PA

Average rainfall days in January - Lancaster, PA
  • Average rainfall days in January: 8.6 days

The month with the highest number of rainy days is May (17.8 days).
The month with the least rainy days is February (8 days).

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Average snowfall in January
Lancaster, PA

Average snowfall in January - Lancaster, PA
  • Average snowfall in January: 3.15"

The month with the highest snowfall is March (3.66").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Lancaster, PA

Average snowfall days in January - Lancaster, PA
  • Average snowfall days in January: 6.8 days

The month with the highest number of snowfall days is January (6.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

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

Average daylight in January / Average sunshine in January - Lancaster, 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 24min).
The month with the least sunshine is February (Average sunshine: 4h and 30min).

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Average sunshine days in January
Lancaster, PA

Average sunshine days in January - Lancaster, PA
  • Average sunshine days in January: 17.6 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is May (11.3 days).

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Average UV index in January
Lancaster, PA

Average UV index in January - Lancaster, 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, November and December (UV index 2).

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Average cloud cover in January
Lancaster, PA

Average cloud cover in January - Lancaster, PA
  • Average cloud cover in January: 48

The month with the most cloud cover is February (Cloud cover 50).
The month with the least cloud cover is July (Cloud cover 33).

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Average visibility in January
Lancaster, PA

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

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

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Lancaster, Pennsylvania, USA

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