Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average sea temperature in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January, recording an average high temperature of 38.8°F (3.8°C) and a low temperature of 31.3°F (-0.4°C), is Shelter Island Heights's coldest month.Humidity
In January, the average relative humidity is 73%.Rainfall
In Shelter Island Heights, in January, during 9.1 rainfall days, 2.56" (65mm) of precipitation is typically accumulated. In Shelter Island Heights, during the entire year, the rain falls for 154.1 days and collects up to 34.92" (887mm) of precipitation.Snowfall
Months with snowfall in Shelter Island Heights are January through March, November and December. In Shelter Island Heights, in January, snow falls for 4.2 days, with typically accumulated 1.85" (47mm) of snow. Throughout the year, there are 13.9 snowfall days, and 6.61" (168mm) of snow is accumulated.Ocean temperature
In Shelter Island Heights, in January, the average water temperature is 41.9°F (5.5°C).Note: At temperatures below 50°F (10°C), swimming in a suitably protected swimsuit is feasible; otherwise, cold shock and loss of breathing control are imminent. Even a short swim, without thermal protection, at temperatures around 55.4°F (13°C) is not comfortable.
Daylight
In Shelter Island Heights, the average length of the day in January is 9h and 37min.On the first day of January, 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.
Sunshine
In January, the average sunshine is 4.9h.UV index
The months with the lowest UV index are January through March and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from exposure to the Sun's UV rays for average individuals.Note: In January, a daily UV index of 2 turns into the following recommendations:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the coldest months?
Is January cold?
What is the average humidity in January in Shelter Island Heights?
How many days does it rain in January?
How much does it snow in January?
What is the water temperature in January?
What is the average length of the day in January?
What time are sunrise and sunset in January?
How many hours of sunshine does Shelter Island Heights have in January?
What is the month with the lowest UV index?
What is the UV index intensity in January in Shelter Island Heights?
Average temperature in January
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, NY
- Average daylight in January: 9h and 4min
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 5min
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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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
Shelter Island Heights, 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).
Shelter Island Heights, New York, USA
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