January weather forecast and climate
Commack, NY

January, the same as December, is another cold winter month in Commack, New York, with average temperature fluctuating between 28.9°F (-1.7°C) and 37.6°F (3.1°C).

Temperature

January is the coldest month, with an average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 28.9°F (-1.7°C).

Humidity

In Commack, the average relative humidity in January is 72%.

Rainfall

The month with the least rainfall is January when the rain falls for 7.8 days and typically collects 2.2" (56mm) of precipitation.

Snowfall

January through March, November and December are months with snowfall in Commack, New York. In Commack, during 4.2 snowfall days, 1.14" (29mm) of snow is typically accumulated. In Commack, during the entire year, snow falls for 15.4 days, and aggregates up to 5.71" (145mm) of snow.

Daylight

In January, the average length of the day in Commack is 9.6h.

Sunshine

The average sunshine in Commack is 5.2h.

UV index

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Commack. A UV Index of 2, and less, symbolizes a minimal health hazard from unsafe exposure to the UV radiation for ordinary individuals.
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 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 Commack?

With an average high-temperature of 37.6°F (3.1°C) and an average low-temperature of 28.9°F (-1.7°C), January is the coldest month.

What is the temperature in January in Commack?

The average high-temperature, in January, is 37.6°F (3.1°C), while the average low-temperature is 28.9°F (-1.7°C).

What is the average humidity in January in Commack?

In January, the average relative humidity in Commack, New York, is 72%.

How many days does it rain in January in Commack?

In January, in Commack, New York, the rain falls for 7.8 days. Throughout January, 2.2" (56mm) of precipitation is accumulated.

What is the driest month in Commack?

The month with the least rainfall in Commack is January when the rain falls for 7.8 days and typically collects 2.2" (56mm) of precipitation.

How many days does it snow in January in Commack?

In Commack, during January, snow falls for 4.2 days and regularly aggregates up to 1.14" (29mm) of snow.

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

In Commack, New York, the average length of the day in January is 9.6h.

How many hours of sunshine does Commack have in January?

The average sunshine in January is 5.2h.

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

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in January in Commack?

The average daily maximum UV index in January is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV rays.
Average temperature in January - Commack, NY
  • Average high temperature in January: 3.1°C

The warmest month (with the highest average high temperature) is July (26.3°C).
The month with the lowest average high temperature is January (3.1°C).

  • Average low temperature in January: -1.7°C

The month with the highest average low temperature is August (22°C).
The coldest month (with the lowest average low temperature) is January (-1.7°C).

Average pressure in January - Commack, NY
  • Average pressure in January: 1017.5mbar

The month with the highest atmospheric pressure is November (1019.1mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in January - Commack, NY
  • Average wind speed in January: 20.6km/h

The windiest month (with the highest average wind speed) is January (20.6km/h).
The calmest month (with the lowest average wind speed) is July (13.3km/h).

Average humidity in January - Commack, NY
  • Average humidity in January: 72%

The month with the highest relative humidity is May (77%).
The month with the lowest relative humidity is November (71%).

Average rainfall in January - Commack, NY
  • Average rainfall in January: 56mm

The wettest month (with the highest rainfall) is July (100mm).
The driest month (with the least rainfall) is January (56mm).

Average rainfall days in January - Commack, NY
  • Average rainfall days in January: 7.8 days

The month with the highest number of rainy days is July (17.4 days).
The month with the least rainy days is January (7.8 days).

Average snowfall in January - Commack, NY
  • Average snowfall in January: 29mm

The month with the highest snowfall is March (47mm).
Months with the least snowfall are April, May, June, July, August, September and October (0mm).

Average snowfall days in January - Commack, NY
  • Average snowfall days in January: 4.2 days

The month with the highest number of snowfall days is February (4.8 days).
Months with the least snowfall days are May, June, July, August and September (0 days).

Average daylight in January / Average sunshine in January - Commack, NY
  • Average daylight in January: 9.6h

The month with the longest days is June (Average daylight: 15.1h).
The month with the shortest days is December (Average daylight: 9.3h).

  • Average sunshine in January: 5.2h

The month with the most sunshine is July (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in January - Commack, NY
  • Average sunshine days in January: 18.5 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (11.4 days).

Average UV index in January - Commack, NY
  • Average UV index in January: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March and December (UV index 2).

Average cloud cover in January - Commack, NY
  • Average cloud cover in January: 44

The month with the most cloud cover is December (Cloud cover 48).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in January - Commack, NY
  • Average visibility in January: 9km

Months with the highest visibility are June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April, May and December (9km).