January weather forecast and climate
Williston, NY

January, the same as December, in Williston, New York, is a freezing cold winter month, with average temperature ranging between max 28.9°F (-1.7°C) and min 18.1°F (-7.7°C).

Temperature

The coldest month is January, with an average high-temperature of 28.9°F (-1.7°C) and an average low-temperature of 18.1°F (-7.7°C).

Humidity

Months with the highest humidity in Williston are January and February, with an average relative humidity of 87%.

Rainfall

In Williston, during 8.3 rainfall days, 1.42" (36mm) of precipitation is typically accumulated. Throughout the year, in Williston, New York, there are 161.8 rainfall days, and 21.93" (557mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Williston are January through May, October through December. In Williston, in January, during 19 snowfall days, 5.04" (128mm) of snow is typically accumulated. Throughout the year, in Williston, there are 78.6 snowfall days, and 25.24" (641mm) of snow is accumulated.

Daylight

The average length of the day in January is 9.5h.

Sunshine

The month with the least sunshine in Williston is January, with an average of 2.3h of sunshine.

UV index

Months with the lowest UV index in Williston are January and December, with an average maximum UV index of 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the UV radiation for average individuals.
Note: In January, the average maximum UV index of 1 translate into the following recommendations:
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 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.

What is the coldest month in Williston?

January is the coldest month in Williston, New York, with an average high-temperature of 28.9°F (-1.7°C) and an average low-temperature of 18.1°F (-7.7°C).

What is the temperature in January in Williston?

The average high-temperature, in January, in Williston, is 28.9°F (-1.7°C), while the average low-temperature is 18.1°F (-7.7°C).

What are the most humid months in Williston?

Months with the highest humidity in Williston, New York, are January and February, with an average relative humidity of 87%.

What is the average humidity in January in Williston?

The average relative humidity in January in Williston, New York, is 87%.

How many days does it rain in January in Williston?

In Williston, New York, in January, during 8.3 rainfall days, 1.42" (36mm) of precipitation is typically accumulated.

How many days does it snow in January in Williston?

In Williston, in January, snow falls for 19 days, with typically accumulated 5.04" (128mm) of snow.

How many hours of daylight does Williston have in January?

In Williston, New York, the average length of the day in January is 9.5h.

What is the month with the least sunshine in Williston?

The month with the least sunshine is January, with an average of 2.3h of sunshine.

How long on average sun shines in January in Williston?

In January, the average sunshine is 2.3h.

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

Months with the lowest UV index in Williston are January and December, with an average maximum UV index of 1.

What is the UV index reading in January in Williston?

In January, the average daily maximum UV index in Williston is 1. A UV Index of 2, and less, symbolizes a low health threat from the exposure to the Sun's UV radiation.
Average temperature in January - Williston, NY
  • Average high temperature in January: -1.7°C

The warmest month (with the highest average high temperature) is July (26.2°C).
The month with the lowest average high temperature is January (-1.7°C).

  • Average low temperature in January: -7.7°C

The month with the highest average low temperature is July (16.1°C).
The coldest month (with the lowest average low temperature) is January (-7.7°C).

Average pressure in January - Williston, NY
  • Average pressure in January: 1017.7mbar

The month with the highest atmospheric pressure is November (1018.9mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).

Average wind speed in January - Williston, NY
  • Average wind speed in January: 16.6km/h

The windiest month (with the highest average wind speed) is January (16.6km/h).
The calmest month (with the lowest average wind speed) is July (10.3km/h).

Average humidity in January - Williston, NY
  • Average humidity in January: 87%

Months with the highest relative humidity are January and February (87%).
Months with the lowest relative humidity are May, July and August (77%).

Average rainfall in January - Williston, NY
  • Average rainfall in January: 36mm

The wettest month (with the highest rainfall) is May (62mm).
The driest month (with the least rainfall) is September (34mm).

Average rainfall days in January - Williston, NY
  • Average rainfall days in January: 8.3 days

The month with the highest number of rainy days is July (18 days).
The month with the least rainy days is February (6.8 days).

Average snowfall in January - Williston, NY
  • Average snowfall in January: 128mm

The month with the highest snowfall is February (168mm).
Months with the least snowfall are June, July, August and September (0mm).

Average snowfall days in January - Williston, NY
  • Average snowfall days in January: 19 days

The month with the highest number of snowfall days is January (19 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Williston, NY
  • Average daylight in January: 9.5h

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: 2.3h

The month with the most sunshine is July (Average sunshine: 10.3h).
The month with the least sunshine is January (Average sunshine: 2.3h).

Average sunshine days in January - Williston, NY
  • Average sunshine days in January: 7.1 days

The month with the most sunshine days is June (13.4 days).
The month with the least sunshine days is February (6.7 days).

Average UV index in January - Williston, 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 and December (UV index 1).

Average cloud cover in January - Williston, NY
  • Average cloud cover in January: 78

The month with the most cloud cover is January (Cloud cover 78).
The month with the least cloud cover is August (Cloud cover 32).

Average visibility in January - Williston, NY
  • Average visibility in January: 8km

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