January weather forecast
Williamstown, OH

Weather in January

January, like December, is another subzero cold winter month in Williamstown, Ohio, with an average temperature ranging between min 19.8°F (-6.8°C) and max 31.1°F (-0.5°C).

Temperature

January is the coldest month, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 19.8°F (-6.8°C).

Humidity

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

Rainfall

In Williamstown, in January, it is raining for 8.4 days, with typically 2.01" (51mm) of accumulated precipitation. In Williamstown, Ohio, during the entire year, the rain falls for 168.7 days and collects up to 29.72" (755mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Williamstown, during January, snow falls for 13.4 days and regularly aggregates up to 2.87" (73mm) of snow. In Williamstown, Ohio, during the entire year, snow falls for 48.9 days and aggregates up to 13.23" (336mm) of snow.

Daylight

In January, the average length of the day in Williamstown is 9h and 38min.
On the first day of January, sunrise is at 7:58 am and sunset at 5:17 pm. On the last day of the month, sunrise is at 7:45 am and sunset at 5:50 pm EST.

Sunshine

With an average of 3.4h of sunshine, January has the least sunshine of the year.

UV index

In January, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.
Note: In January, the average maximum UV index of 2 translate into the following recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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 Williamstown?

The coldest month in Williamstown is January, with an average high-temperature of 31.1°F (-0.5°C) and an average low-temperature of 19.8°F (-6.8°C).

What is the temperature in January in Williamstown?

In January, in Williamstown, Ohio, the average high-temperature is 31.1°F (-0.5°C), and the average low-temperature is 19.8°F (-6.8°C).

What is the most humid month in Williamstown?

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

What is the average humidity in January in Williamstown?

The average relative humidity in January in Williamstown, Ohio, is 84%.

How many days does it rain in January in Williamstown?

In January, in Williamstown, the rain falls for 8.4 days. Throughout January, 2.01" (51mm) of precipitation is accumulated.

How much does it snow in Williamstown in January?

In January, in Williamstown, Ohio, it is snowing for 13.4 days. Throughout January, 2.87" (73mm) of snow is accumulated.

How many hours of daylight does Williamstown have in January?

The average day length in January in Williamstown, Ohio, is 9h and 38min.

When is the sunrise / sunset in January in Williamstown?

In January, on the first day of the month, sunrise is at 7:58 am and sunset at 5:17 pm. On the last day of the month, in Williamstown, Ohio, sunrise is at 7:45 am and sunset at 5:50 pm EST.

What is the month with the least sunshine in Williamstown?

The month with the least sunshine in Williamstown, Ohio, is January, with an average of 3.4h of sunshine.

How many hours of sunshine does Williamstown have in January?

The average sunshine duration in January in Williamstown is 3.4h.

What is the UV index reading in January in Williamstown?

In Williamstown, Ohio, the average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's 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
Williamstown, OH

Average temperature in January - Williamstown, OH
  • Average high temperature in January: 31.1°F

The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (31.1°F).

  • Average low temperature in January: 19.8°F

The month with the highest average low temperature is July (63.7°F).
The coldest month (with the lowest average low temperature) is January (19.8°F).

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Average pressure in January
Williamstown, OH

Average pressure in January - Williamstown, OH
  • Average pressure in January: 30.11"Hg

The month with the highest atmospheric pressure is November (30.12"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

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Average wind speed in January
Williamstown, OH

Average wind speed in January - Williamstown, OH
  • Average wind speed in January: 10.7mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (6mph).

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Average humidity in January
Williamstown, OH

Average humidity in January - Williamstown, OH
  • Average humidity in January: 84%

The months with the highest relative humidity are January and February (84%).
The months with the lowest relative humidity are October and November (75%).

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Average rainfall in January
Williamstown, OH

Average rainfall in January - Williamstown, OH
  • Average rainfall in January: 2.01"

The wettest month (with the highest rainfall) is June (3.54").
The driest month (with the least rainfall) is December (1.81").

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Average rainfall days in January
Williamstown, OH

Average rainfall days in January - Williamstown, OH
  • Average rainfall days in January: 8.4 days

The month with the highest number of rainy days is May (19.3 days).
The month with the least rainy days is January (8.4 days).

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Average snowfall in January
Williamstown, OH

Average snowfall in January - Williamstown, OH
  • Average snowfall in January: 2.87"

The month with the highest snowfall is February (3.74").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Williamstown, OH

Average snowfall days in January - Williamstown, OH
  • Average snowfall days in January: 13.4 days

The month with the highest number of snowfall days is January (13.4 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
Williamstown, OH

Average daylight in January / Average sunshine in January - Williamstown, OH
  • Average daylight in January: 9h and 38min

The month with the longest days is June (Average daylight: 15h and 4min).
The month with the shortest days is December (Average daylight: 9h and 18min).

  • Average sunshine in January: 3h and 24min

The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 3h and 24min).

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Average sunshine days in January
Williamstown, OH

Average sunshine days in January - Williamstown, OH
  • Average sunshine days in January: 10.7 days

The month with the most sunshine days is November (16.3 days).
The month with the least sunshine days is June (9.3 days).

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Average UV index in January
Williamstown, OH

Average UV index in January - Williamstown, OH
  • Average UV index in January: 2

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

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Average cloud cover in January
Williamstown, OH

Average cloud cover in January - Williamstown, OH
  • Average cloud cover in January: 65

The month with the most cloud cover is January (Cloud cover 65).
The month with the least cloud cover is July (Cloud cover 32).

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Average visibility in January
Williamstown, OH

Average visibility in January - Williamstown, OH
  • Average visibility in January: 5mi

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

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