January weather forecast
Monroeville, PA

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Weather in January

January, the same as December, is an icy winter month in Monroeville, Pennsylvania, with an average temperature fluctuating between 20.7°F (-6.3°C) and 33.1°F (0.6°C).

Temperature

Monroeville's coldest month, January, registers temperatures that range from a high of 33.1°F (0.6°C) to a low of 20.7°F (-6.3°C).

Humidity

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

Rainfall

In Monroeville, during January, the rain falls for 7.7 days and regularly aggregates up to 1.1" (28mm) of precipitation. In Monroeville, during the entire year, the rain falls for 151 days and collects up to 20.39" (518mm) of precipitation.

Snowfall

Months with snowfall are January through May, October through December. In Monroeville, during January, snow falls for 9.7 days and regularly aggregates up to 2.28" (58mm) of snow. In Monroeville, during the entire year, snow falls for 35.4 days and aggregates up to 10.35" (263mm) of snow.

Daylight

In January, the average length of the day is 9h and 41min.
On the first day of January, sunrise is at 7:42 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:35 pm EST.

Sunshine

With an average of 2.9h of sunshine, January has the least sunshine of the year.

UV index

In Monroeville, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV rays for the average person.
Note: A daily maximum UV index of 2 in January translates into the following instructions:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Updated: Aug 30, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

What part of the year is the coldest?

January brings the lowest temperatures, with an average high of 33.1°F (0.6°C) and an average low of 20.7°F (-6.3°C).

How cold is it in January?

During January, Monroeville experiences an average high-temperature of 33.1°F (0.6°C) and a low-temperature of 20.7°F (-6.3°C).

What is the average humidity in January?

The average relative humidity in January is 84%.

How many days does it rain in January?

In Monroeville, during January, the rain falls for 7.7 days and regularly aggregates up to 1.1" (28mm) of precipitation.

How much does it snow in January?

In Monroeville, during January, snow falls for 9.7 days and regularly aggregates up to 2.28" (58mm) of snow.

What is the average length of the day in January?

In Monroeville, 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 7:42 am and sunset at 5:03 pm. On the last day of the month, sunrise is at 7:29 am and sunset at 5:35 pm EST.

What is the month with the least sunshine?

The month with the least sunshine is January, with an average of 2.9h of sunshine.

How many hours of sunshine does Monroeville have in January?

The average sunshine duration in January is 2.9h.

What is the UV index intensity in January?

The average daily maximum UV index in January is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health 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
Monroeville, PA

Average temperature in January - Monroeville, PA
  • Average high temperature in January: 33.1°F

The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (33.1°F).

  • Average low temperature in January: 20.7°F

The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (20.7°F).

Average pressure in January
Monroeville, PA

Average pressure in January - Monroeville, PA
  • Average pressure in January: 30.11"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
Monroeville, PA

Average wind speed in January - Monroeville, PA
  • Average wind speed in January: 8.1mph

The windiest month (with the highest average wind speed) is January (8.1mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

Average humidity in January
Monroeville, PA

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

The month with the highest relative humidity is February (85%).
The months with the lowest relative humidity are April, July and August (76%).

Average rainfall in January
Monroeville, PA

Average rainfall in January - Monroeville, PA
  • Average rainfall in January: 1.1"

The wettest month (with the highest rainfall) is May (2.56").
The driest month (with the least rainfall) is November (1.06").

Average rainfall days in January
Monroeville, PA

Average rainfall days in January - Monroeville, PA
  • Average rainfall days in January: 7.7 days

The month with the highest number of rainy days is May (18.2 days).
The month with the least rainy days is January (7.7 days).

Average snowfall in January
Monroeville, PA

Average snowfall in January - Monroeville, PA
  • Average snowfall in January: 2.28"

The month with the highest snowfall is February (2.52").
The months with the least snowfall are June, July, August and September (0").

Average snowfall days in January
Monroeville, PA

Average snowfall days in January - Monroeville, PA
  • Average snowfall days in January: 9.7 days

The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Monroeville, 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 18min).

  • Average sunshine in January: 2h and 5min

The month with the most sunshine is August (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 2h and 54min).

Average sunshine days in January
Monroeville, PA

Average sunshine days in January - Monroeville, PA
  • Average sunshine days in January: 16.7 days

The month with the most sunshine days is November (19.6 days).
The month with the least sunshine days is May (10.1 days).

Average UV index in January
Monroeville, PA

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

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

Average cloud cover in January
Monroeville, PA

Average cloud cover in January - Monroeville, PA
  • Average cloud cover in January: 69

The month with the most cloud cover is January (Cloud cover 69).
The month with the least cloud cover is August (Cloud cover 33).

Average visibility in January
Monroeville, PA

Average visibility in January - Monroeville, PA
  • Average visibility in January: 5mi

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

Monroeville, Pennsylvania, USA

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