January weather forecast and climate
Williamsville, NY

Weather in January

January, the same as December, in Williamsville, New York, is a freezing cold winter month, with temperature in the range of an average low of 18.7°F (-7.4°C) and an average high of 29.3°F (-1.5°C).

Temperature

The coldest month is January, with an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 18.7°F (-7.4°C).

Humidity

January and February, with an average relative humidity of 86%, are most humid months in Williamsville.

Rainfall

In Williamsville, during January, the rain falls for 7.1 days and regularly aggregates up to 1.02" (26mm) of precipitation. Throughout the year, there are 139.2 rainfall days, and 14.84" (377mm) of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, October through December. Months with the most snowfall are January and February, with an average 2.95" (75mm) of accumulated snow.

Daylight

In January, the average length of the day in Williamsville is 9.4h.

Sunshine

January has the least sunshine of the year in Williamsville, with an average of 2.4h of sunshine.

UV index

Months with the lowest UV index are January, February and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low threat to health from the exposure to the Sun's UV radiation for the ordinary person.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always 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 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 Williamsville?

January is the coldest month in Williamsville, with an average high-temperature of 29.3°F (-1.5°C) and an average low-temperature of 18.7°F (-7.4°C).

What is the most humid month in Williamsville?

January and February, with an average relative humidity of 86%, are most humid months in Williamsville, New York.

What is the average humidity in January in Williamsville?

In Williamsville, New York, the average relative humidity in January is 86%.

How many days does it rain in January in Williamsville?

In Williamsville, in January, during 7.1 rainfall days, 1.02" (26mm) of precipitation is typically accumulated.

What is the snowiest month in Williamsville?

Months with the most snowfall in Williamsville, New York, are January and February, with an average 2.95" (75mm) of accumulated snow.

How many days does it snow in January in Williamsville?

In Williamsville, in January, snow falls for 15.8 days, with typically accumulated 2.95" (75mm) of snow.

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

In January, the average length of the day in Williamsville is 9.4h.

What is the month with the least sunshine in Williamsville?

The month with the least sunshine in Williamsville, New York, is January, with an average of 2.4h of sunshine.

How many hours of sunshine does Williamsville have in January?

In January, the average sunshine in Williamsville is 2.4h.

What is the month with the lowest UV index in Williamsville?

Months with the lowest UV index in Williamsville, New York, are January, February and December, with an average maximum UV index of 1.

What is the UV index reading in January in Williamsville?

In January, the average daily maximum UV index is 1. A UV Index reading of 2, and below, represents a minimal health vulnerability from the exposure to the Sun's UV rays.

Average temperature in January
Williamsville, NY

Average temperature in January - Williamsville, NY
  • Average high temperature in January: 29.3°F

The warmest month (with the highest average high temperature) is July (79.3°F).
The month with the lowest average high temperature is January (29.3°F).

  • Average low temperature in January: 18.7°F

The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (18.7°F).

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Average pressure in January
Williamsville, NY

Average pressure in January - Williamsville, NY
  • Average pressure in January: 30.05"

The month with the highest atmospheric pressure is November (30.09").
The month with the lowest atmospheric pressure is June (29.93").

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Average wind speed in January
Williamsville, NY

Average wind speed in January - Williamsville, NY
  • Average wind speed in January: 10.7mph

The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest month (with the lowest average wind speed) is July (6.5mph).

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Average humidity in January
Williamsville, NY

Average humidity in January - Williamsville, NY
  • Average humidity in January: 86%

Months with the highest relative humidity are January and February (86%).
Months with the lowest relative humidity are July and August (75%).

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Average rainfall in January
Williamsville, NY

Average rainfall in January - Williamsville, NY
  • Average rainfall in January: 1.02"

The wettest month (with the highest rainfall) is July (1.61").
The driest month (with the least rainfall) is September (0.91").

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Average rainfall days in January
Williamsville, NY

Average rainfall days in January - Williamsville, NY
  • Average rainfall days in January: 7.1 days

The month with the highest number of rainy days is July (15.8 days).
The month with the least rainy days is February (6.4 days).

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Average snowfall in January
Williamsville, NY

Average snowfall in January - Williamsville, NY
  • Average snowfall in January: 2.95"

Months with the highest snowfall are January and February (2.95").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in January
Williamsville, NY

Average snowfall days in January - Williamsville, NY
  • Average snowfall days in January: 15.8 days

The month with the highest number of snowfall days is January (15.8 days).
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
Williamsville, NY

Average daylight in January / Average sunshine in January - Williamsville, NY
  • Average daylight in January: 9.4h

The month with the longest days is June (Average daylight: 15.3h).
The month with the shortest days is December (Average daylight: 9.1h).

  • Average sunshine in January: 2.4h

Months with the most sunshine are July and August (Average sunshine: 10.4h).
The month with the least sunshine is January (Average sunshine: 2.4h).

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Average sunshine days in January
Williamsville, NY

Average sunshine days in January - Williamsville, NY
  • Average sunshine days in January: 11.1 days

The month with the most sunshine days is September (15.5 days).
The month with the least sunshine days is February (10.2 days).

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Average UV index in January
Williamsville, NY

Average UV index in January - Williamsville, NY
  • Average UV index in January: 1

The month with the highest UV index is July (UV index 6).
Months with the lowest UV index are January, February and December (UV index 1).

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Average cloud cover in January
Williamsville, NY

Average cloud cover in January - Williamsville, NY
  • Average cloud cover in January: 77

The month with the most cloud cover is January (Cloud cover 77).
The month with the least cloud cover is August (Cloud cover 29).

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Average visibility in January
Williamsville, NY

Average visibility in January - Williamsville, NY
  • Average visibility in January: 5mi

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

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