January weather forecast
Donora, PA

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Weather in January

January, the same as December, is an icy winter month in Donora, Pennsylvania, with an average temperature ranging between max 34°F (1.1°C) and min 21.2°F (-6°C).

Temperature

In Donora, the month of January is known for its lowest average temperatures, reaching a high of 34°F (1.1°C) and a low of 21.2°F (-6°C).

Humidity

January and February, with an average relative humidity of 84%, are the most humid months.

Rainfall

In January, the rain falls for 11.7 days. Throughout January, 2.64" (67mm) of precipitation is accumulated. Throughout the year, there are 191.3 rainfall days, and 35.24" (895mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. January is the month with the most snowfall. Snow falls for 17.8 days and accumulates 6.26" (159mm) of snow.

Daylight

In Donora, the average length of the day in January is 9h and 42min.
On the first day of the month, sunrise is at 7:41 am and sunset at 5:04 pm. On the last day of January, in Donora, sunrise is at 7:29 am and sunset at 5:36 pm EST.

Sunshine

January has the least sunshine of the year in Donora, with an average of 3h of sunshine.

UV index

In January, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal health hazard from exposure to the Sun's UV rays for average individuals.
Note: The maximum daily UV index of 2 during January translates into the following directions:
Babies, children, and individuals with sensitive skin should always have protection against extended sun exposure. To avoid the Sun's strongest rays, limit exposure around the mid-day period. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.

Frequently asked questions

What is the coldest month?

Donora's January weather reaches an average high of 34°F (1.1°C) and an average low of 21.2°F (-6°C), making it the coldest month.

How cold is January?

An average high-temperature, in January, in Donora, is 34°F (1.1°C) and the average low-temperature is 21.2°F (-6°C).

What is the most humid month?

The months with the highest humidity are January and February, with an average relative humidity of 84%.

What is the average humidity in January in Donora?

In Donora, the average relative humidity in January is 84%.

How many days does it rain in January?

In Donora, in January, during 11.7 rainfall days, 2.64" (67mm) of precipitation is typically accumulated.

What is the snowiest month?

The month with the most snowfall is January, when snow falls for 17.8 days and typically aggregates up to 6.26" (159mm) of snow.

How many days does it snow in January?

In January, it is snowing for 17.8 days. Throughout January, 6.26" (159mm) of snow is accumulated.

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

In Donora, the average day length in January is 9h and 42min.

When is the sunrise / sunset in January?

In January, on the first day of the month, sunrise is at 7:41 am and sunset at 5:04 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:36 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is January, with an average of 3h of sunshine.

How long on average sun shines in January?

The average sunshine duration in January is 3h.

What is the UV index intensity in January?

In Donora, the average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability 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
Donora, PA

Average temperature in January - Donora, PA
  • Average high temperature in January: 34°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 (34°F).

  • Average low temperature in January: 21.2°F

The month with the highest average low temperature is July (61.5°F).
The coldest month (with the lowest average low temperature) is January (21.2°F).

Average pressure in January
Donora, PA

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

The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).

Average wind speed in January
Donora, PA

Average wind speed in January - Donora, PA
  • Average wind speed in January: 7.9mph

The windiest month (with the highest average wind speed) is January (7.9mph).
The calmest month (with the lowest average wind speed) is August (4.6mph).

Average humidity in January
Donora, PA

Average humidity in January - Donora, PA
  • Average humidity in January: 84%

The months with the highest relative humidity are January and February (84%).
The month with the lowest relative humidity is August (76%).

Average rainfall in January
Donora, PA

Average rainfall in January - Donora, PA
  • Average rainfall in January: 2.64"

The wettest month (with the highest rainfall) is May (3.78").
The driest month (with the least rainfall) is November (2.13").

Average rainfall days in January
Donora, PA

Average rainfall days in January - Donora, PA
  • Average rainfall days in January: 11.7 days

The month with the highest number of rainy days is May (21.8 days).
The months with the least rainy days are January and February (11.7 days).

Average snowfall in January
Donora, PA

Average snowfall in January - Donora, PA
  • Average snowfall in January: 6.26"

The month with the highest snowfall is January (6.26").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Donora, PA

Average snowfall days in January - Donora, PA
  • Average snowfall days in January: 17.8 days

The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Donora, 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: 3h and 0min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 0min).

Average sunshine days in January
Donora, PA

Average sunshine days in January - Donora, PA
  • Average sunshine days in January: 6.8 days

The month with the most sunshine days is November (14.3 days).
The month with the least sunshine days is January (6.8 days).

Average UV index in January
Donora, PA

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

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

Average cloud cover in January
Donora, PA

Average cloud cover in January - Donora, PA
  • Average cloud cover in January: 68

The month with the most cloud cover is January (Cloud cover 68).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in January
Donora, PA

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

The months with the highest visibility are April, August and November (6mi).
The months with the lowest visibility are January and February (4mi).

Donora, Pennsylvania, USA

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