January weather forecastGreenport, NY

January

Weather in January

January, like December, in Greenport, New York, is an icy winter month, with an average temperature ranging between max 38.8°F (3.8°C) and min 31.3°F (-0.4°C).

Temperature

January is the month when Greenport, New York, sees the lowest average temperatures, with a high of 38.8°F (3.8°C) and a low of 31.3°F (-0.4°C).

Humidity

In January, the average relative humidity in Greenport is 73%.

Rainfall

In Greenport, in January, during 9.1 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. Throughout the year, in Greenport, there are 154.1 rainfall days, and 34.92" (887mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Greenport are January through March, November and December. In Greenport, in January, snow falls for 4.2 days, with typically accumulated 1.85" (47mm) of snow. In Greenport, New York, during the entire year, snow falls for 13.9 days and aggregates up to 6.61" (168mm) of snow.

Ocean temperature

In Greenport, New York, in January, the average water temperature is 41.9°F (5.5°C).
Note: Diving into 41.9°F (5.5°C) when it's under 50°F (10°C) can cause immediate cold shock symptoms, marked by hyperventilation.

Daylight

In January, the average length of the day is 9h and 37min.
On the first day of the month, sunrise is at 7:14 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:01 am and sunset at 5:04 pm EST.

Sunshine

In Greenport, the average sunshine in January is 4.9h.

UV index

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Greenport. A UV Index of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for average individuals.
Note: In January, a daily UV index of 2 turns into the following recommendations:
While most people can stay under the sun for an hour without burning, children must always be guarded against sun exposure. Exposing oneself to the midday Sun can be harmful due to the strong UV radiation; limit your time outside. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.

Updated: Feb 13, 2024
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

January stands out as Greenport's coldest month, with temperatures ranging between an average high of 38.8°F (3.8°C) and a low of 31.3°F (-0.4°C).

The high-temperature in Greenport during January is 38.8°F (3.8°C) and the low-temperature is 31.3°F (-0.4°C).

In January, the average relative humidity is 73%.

In January, in Greenport, New York, the rain falls for 9.1 days. Throughout January, 2.56" (65mm) of precipitation is accumulated.

In January, in Greenport, it is snowing for 4.2 days. Throughout January, 1.85" (47mm) of snow is accumulated.

In Greenport, in January, the average water temperature is 41.9°F (5.5°C). Swimming in 41.9°F (5.5°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.

In January, the average day length in Greenport is 9h and 37min.

On the first day of January in Greenport, New York, sunrise is at 7:14 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:01 am and sunset at 5:04 pm EST.

The average sunshine duration in January in Greenport, New York, is 4.9h.

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

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

Today

Tomorrow

Long-term

Year January F M A M J J A S O N D

Dec

January

Feb

Average high temperature

45°F

38.8°F

39.6°F

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

16.7mph

16.8mph

16.1mph

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

2.3

4.2

Average sea temperature

Average daylight

Average sunshine

Average sunshine days

13.7

15.3

12.8

Average UV index

Average cloud cover

Average visibility

Average temperature in January
Greenport, NY

Average high temperature in January: 38.8°F

The warmest month (with the highest average high temperature) is August (75.9°F).
The month with the lowest average high temperature is January (38.8°F).

Average low temperature in January: 31.3°F

The month with the highest average low temperature is August (71.2°F).
The coldest month (with the lowest average low temperature) is January (31.3°F).

Average pressure in January
Greenport, NY

Average pressure in January: 30.03"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

Average wind speed in January
Greenport, NY

Average wind speed in January: 16mph

The windiest month (with the highest average wind speed) is January (16mph).
The calmest month (with the lowest average wind speed) is July (10.4mph).

Average humidity in January
Greenport, NY

Average humidity in January: 73%

The months with the highest relative humidity are May and June (81%).
The month with the lowest relative humidity is November (72%).

Average rainfall in January
Greenport, NY

Average rainfall in January: 2.56"

The wettest month (with the highest rainfall) is December (3.82").
The driest month (with the least rainfall) is September (2.17").

Average rainfall days in January
Greenport, NY

Average rainfall days in January: 9.1 days

The month with the highest number of rainy days is May (15.3 days).
The month with the least rainy days is January (9.1 days).

Average snowfall in January
Greenport, NY

Average snowfall in January: 1.85"

The month with the highest snowfall is March (2.36").
The months with the least snowfall are April, May, June, July, August, September and October (0").

Average snowfall days in January
Greenport, NY

Average snowfall days in January: 4.2 days

The month with the highest number of snowfall days is January (4.2 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in January
Greenport, NY

Average sea temperature in January: 41.9°F

The best month for swimming (with the highest average sea temperature) is August (72.1°F).
The coldest month (with the lowest average sea temperature) is February (38.8°F).

Average daylight in January /
Average sunshine in January
Greenport, NY

Average daylight in January: 9h and 36min

The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).

Average sunshine in January: 4h and 54min

The months with the most sunshine are July and August (Average sunshine: 10h and 36min).
The month with the least sunshine is December (Average sunshine: 4h and 36min).

Average sunshine days in January
Greenport, NY

Average sunshine days in January: 15.3 days

The month with the most sunshine days is November (16.8 days).
The month with the least sunshine days is February (12.8 days).

Average UV index in January
Greenport, NY

Average UV index in January: 2

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

Average cloud cover in January
Greenport, NY

Average cloud cover in January: 48

The month with the most cloud cover is December (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 27).

Average visibility in January
Greenport, NY

Average visibility in January: 6mi

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