January weather forecast
Sterling, VA

Weather in January

January, like December, in Sterling, Virginia, is another cold winter month, with an average temperature varying between 25.9°F (-3.4°C) and 39.7°F (4.3°C).

Temperature

January is the coldest month, with an average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 25.9°F (-3.4°C).

Humidity

In Sterling, the average relative humidity in January is 74%.

Rainfall

In Sterling, in January, during 9.3 rainfall days, 2.13" (54mm) of precipitation is typically accumulated. Throughout the year, there are 158.1 rainfall days, and 31.46" (799mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Sterling are January through April, November and December. January is the month with the most snowfall in Sterling. Snow falls for 5.1 days and accumulates 3.54" (90mm) of snow.

Daylight

In January, the average length of the day in Sterling is 9h and 48min.
On the first day of the month, sunrise is at 7:28 am and sunset at 4:58 pm. On the last day of January, in Sterling, sunrise is at 7:16 am and sunset at 5:29 pm EST.

Sunshine

January, February and December, with an average of 5h of sunshine, are months with the least sunshine.

UV index

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Sterling. A UV Index estimate of 2, and below, represents a low health risk from exposure to the Sun's UV radiation for the ordinary person.
Note: The average daily UV index of 2 in January transform into the following instructions:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. 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 Sterling?

With an average high-temperature of 39.7°F (4.3°C) and an average low-temperature of 25.9°F (-3.4°C), January is the coldest month in Sterling, Virginia.

What is the average humidity in January in Sterling?

In January, the average relative humidity is 74%.

How many days does it rain in January in Sterling?

In Sterling, Virginia, in January, it is raining for 9.3 days, with typically 2.13" (54mm) of accumulated precipitation.

When does it snow the most in Sterling?

January is the month with the most snowfall. Snow falls for 5.1 days and accumulates 3.54" (90mm) of snow.

How many days does it snow in January in Sterling?

In January, it is snowing for 5.1 days. Throughout January, 3.54" (90mm) of snow is accumulated.

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

In Sterling, the average day length in January is 9h and 48min.

What time are sunrise and sunset in January in Sterling?

On the first day of January in Sterling, sunrise is at 7:28 am and sunset at 4:58 pm. On the last day of the month, sunrise is at 7:16 am and sunset at 5:29 pm EST.

What is the month with the least sunshine in Sterling?

January, February and December, with an average of 5h of sunshine, are months with the least sunshine.

How long on average sun shines in January in Sterling?

In Sterling, Virginia, the average sunshine duration in January is 5h.

What are the months with the lowest UV index in Sterling?

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

What is the UV index intensity in January in Sterling?

In January, the average daily maximum UV index in Sterling, Virginia, is 2. A UV Index reading of 2, and below, represents a low health risk from unprotected exposure to UV radiation.
Average humidity
Average rainfall days
Average snowfall days
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in January
Sterling, VA

Average temperature in January - Sterling, VA
  • Average high temperature in January: 39.7°F

The warmest month (with the highest average high temperature) is July (87.8°F).
The month with the lowest average high temperature is January (39.7°F).

  • Average low temperature in January: 25.9°F

The month with the highest average low temperature is July (67.3°F).
The coldest month (with the lowest average low temperature) is January (25.9°F).

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Average pressure in January
Sterling, VA

Average pressure in January - Sterling, VA
  • 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).

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Average wind speed in January
Sterling, VA

Average wind speed in January - Sterling, VA
  • Average wind speed in January: 7.2mph

The windiest month (with the highest average wind speed) is March (7.5mph).
The calmest month (with the lowest average wind speed) is August (4.7mph).

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Average humidity in January
Sterling, VA

Average humidity in January - Sterling, VA
  • Average humidity in January: 74%

The month with the highest relative humidity is December (78%).
The month with the lowest relative humidity is July (70%).

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Average rainfall in January
Sterling, VA

Average rainfall in January - Sterling, VA
  • Average rainfall in January: 2.13"

The wettest month (with the highest rainfall) is August (3.78").
The driest month (with the least rainfall) is September (1.93").

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Average rainfall days in January
Sterling, VA

Average rainfall days in January - Sterling, VA
  • Average rainfall days in January: 9.3 days

The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (9.3 days).

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Average snowfall in January
Sterling, VA

Average snowfall in January - Sterling, VA
  • Average snowfall in January: 3.54"

The month with the highest snowfall is January (3.54").
The months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in January
Sterling, VA

Average snowfall days in January - Sterling, VA
  • Average snowfall days in January: 5.1 days

The months with the highest number of snowfall days are January and February (5.1 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
Sterling, VA

Average daylight in January / Average sunshine in January - Sterling, VA
  • Average daylight in January: 9h and 48min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in January: 5h and 0min

The month with the most sunshine is July (Average sunshine: 10h and 42min).
The months with the least sunshine are January, February and December (Average sunshine: 5h and 0min).

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Average sunshine days in January
Sterling, VA

Average sunshine days in January - Sterling, VA
  • Average sunshine days in January: 17.2 days

The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is July (11.8 days).

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Average UV index in January
Sterling, VA

Average UV index in January - Sterling, VA
  • Average UV index in January: 2

The months with the highest UV index are May, June, July and August (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
Sterling, VA

Average cloud cover in January - Sterling, VA
  • Average cloud cover in January: 46

The month with the most cloud cover is March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in January
Sterling, VA

Average visibility in January - Sterling, VA
  • Average visibility in January: 6mi

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

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