January weather forecast
Washington, PA

Weather in January

January, like December, in Washington, Pennsylvania, is another cold winter month, with temperature in the range of an average low of 20.8°F (-6.2°C) and an average high of 33.6°F (0.9°C).

Temperature

With an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 20.8°F (-6.2°C), January is the coldest month.

Humidity

In Washington, the average relative humidity is 84%.

Rainfall

January and November are months with the least rain when the rain falls for 7.5 days and typically aggregates up to 0.94" (24mm) of rain.

Snowfall

Months with snowfall in Washington, Pennsylvania, are January through May, October through December. In Washington, in January, during 9.8 snowfall days, 1.06" (27mm) of snow is typically accumulated. In Washington, during the entire year, snow falls for 33.5 days, and aggregates up to 4.88" (124mm) of snow.

Daylight

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

Sunshine

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

UV index

In Washington, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays for average individuals.
Note: The average daily UV index of 2 in January 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 Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the coldest month in Washington?

The coldest month in Washington, Pennsylvania, is January, with an average high-temperature of 33.6°F (0.9°C) and an average low-temperature of 20.8°F (-6.2°C).

What is the average humidity in January in Washington?

The average relative humidity in January in Washington, Pennsylvania, is 84%.

What is the driest month in Washington?

January and November are months with the least rain when the rain falls for 7.5 days and typically aggregates up to 0.94" (24mm) of rain.

How much does it rain in Washington in January?

In Washington, Pennsylvania, in January, it is raining for 7.5 days, with typically 0.94" (24mm) of accumulated precipitation.

How much does it snow in Washington in January?

In Washington, during January, snow falls for 9.8 days and regularly aggregates up to 1.06" (27mm) of snow.

How many hours of daylight does Washington have in January?

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

What is the month with the least sunshine in Washington?

With an average of 3h of sunshine, January has the least sunshine of the year.

How long on average sun shines in January in Washington?

In Washington, Pennsylvania, the average sunshine in January is 3h.

What is the UV index reading in January in Washington?

In January, the average daily maximum UV index in Washington, Pennsylvania, is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from unprotected exposure to the UV radiation.

Average temperature in January
Washington, PA

Average temperature in January - Washington, PA
  • Average high temperature in January: 0.9°C

The warmest month (with the highest average high temperature) is July (28.5°C).
The month with the lowest average high temperature is January (0.9°C).

  • Average low temperature in January: -6.2°C

The month with the highest average low temperature is July (16.6°C).
The coldest month (with the lowest average low temperature) is January (-6.2°C).

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Average pressure in January
Washington, PA

Average pressure in January - Washington, PA
  • Average pressure in January: 1019.9mbar

The month with the highest atmospheric pressure is November (1020.5mbar).
The month with the lowest atmospheric pressure is June (1014.2mbar).

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Average wind speed in January
Washington, PA

Average wind speed in January - Washington, PA
  • Average wind speed in January: 12.5km/h

The windiest month (with the highest average wind speed) is January (12.5km/h).
The calmest month (with the lowest average wind speed) is August (7.3km/h).

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Average humidity in January
Washington, PA

Average humidity in January - Washington, 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 (77%).

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Average rainfall in January
Washington, PA

Average rainfall in January - Washington, PA
  • Average rainfall in January: 24mm

The wettest month (with the highest rainfall) is July (42mm).
The driest months (with the least rainfall) are January and November (24mm).

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Average rainfall days in January
Washington, PA

Average rainfall days in January - Washington, PA
  • Average rainfall days in January: 7.5 days

The month with the highest number of rainy days is May (17.2 days).
The month with the least rainy days is February (7.3 days).

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Average snowfall in January
Washington, PA

Average snowfall in January - Washington, PA
  • Average snowfall in January: 27mm

The month with the highest snowfall is February (32mm).
The months with the least snowfall are June, July, August and September (0mm).

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Average snowfall days in January
Washington, PA

Average snowfall days in January - Washington, PA
  • Average snowfall days in January: 9.8 days

The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

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

Average daylight in January / Average sunshine in January - Washington, PA
  • Average daylight in January: 9.7h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in January: 3h

The month with the most sunshine is August (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 3h).

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Average sunshine days in January
Washington, PA

Average sunshine days in January - Washington, PA
  • Average sunshine days in January: 17.1 days

The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is May (11.8 days).

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Average UV index in January
Washington, PA

Average UV index in January - Washington, 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).

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Average cloud cover in January
Washington, PA

Average cloud cover in January - Washington, 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).

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Average visibility in January
Washington, PA

Average visibility in January - Washington, PA
  • Average visibility in January: 8km

The months with the highest visibility are April and November (9km).
The months with the lowest visibility are January, February, March, May, June, July, August, September, October and December (8km).

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