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 is Shelter Island Heights's coldest month, registering average high temperatures of 38.8°F (3.8°C) and lows of 31.3°F (-0.4°C).Humidity
In January, the average relative humidity in Shelter Island Heights is 73%.Rainfall
In Shelter Island Heights, New York, 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
January through March, November and December are months with snowfall in Shelter Island Heights. In Shelter Island Heights, New York, in January, snow falls for 4.2 days, with typically accumulated 1.85" (47mm) of snow. In Shelter Island Heights, during the entire year, snow falls for 13.9 days and aggregates up to 6.61" (168mm) of snow.Ocean temperature
In Shelter Island Heights, in January, the average water temperature is 41.9°F (5.5°C).Note: Staying in 41.9°F (5.5°C) waters for just a few moments at 55.4°F (13°C) can be harrowing, and below 50°F (10°C) poses breathing and cold shock risks, depending on individual tolerance.
Daylight
In Shelter Island Heights, the average length of the day in January is 9h and 37min.On the first day of January in Shelter Island Heights, 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
The average sunshine in January in Shelter Island Heights 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. A UV Index reading of 2, and below, represents a minimal health hazard from unprotected exposure to Sun's UV rays for average individuals.Note: The maximum daily UV index, 2 in January, converts into the following recommendations:
Babies, children, and those with sensitive skin should always avoid extended periods in the sun. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Sunglasses providing both UVA and UVB protection are non-negotiable on sunlit days. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What part of the year is the coldest in Shelter Island Heights?
How cold is January in Shelter Island Heights?
What is the average humidity in January in Shelter Island Heights?
How many days does it rain in January in Shelter Island Heights?
How much does it snow in Shelter Island Heights in January?
What is the ocean temperature in January in Shelter Island Heights?
What is the average length of the day in January in Shelter Island Heights?
What time are sunrise and sunset in January in Shelter Island Heights?
How long on average sun shines in January in Shelter Island Heights?
What is the month with the lowest UV index in Shelter Island Heights?
How high is the UV index 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
Weather forecast for your location
2. Allow the app to use your location
