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, known for its average high temperature of 37.9°F (3.3°C) and an average low temperature of 30.2°F (-1°C), is the coldest month.Humidity
The average relative humidity in January is 72%.Rainfall
January is the month with the least rainfall. Rain falls for 8.3 days and accumulates 2.17" (55mm) of precipitation.Snowfall
January through March, May, October and December are months with snowfall. In West Sayville, in January, snow falls for 4.3 days, with typically accumulated 1.38" (35mm) of snow. In West Sayville, during the entire year, snow falls for 14.7 days and aggregates up to 6.14" (156mm) of snow.Ocean temperature
In West Sayville, in January, the average water temperature is 42.3°F (5.7°C).Note: Without suitable protection, venturing into 42.3°F (5.7°C) waters cooler than 50°F (10°C) can lead to pronounced cold shock and rapid breaths.
Daylight
The average length of the day in January is 9h and 39min.On the first day of January in West Sayville, sunrise is at 7:16 am and sunset at 4:35 pm. On the last day of the month, sunrise is at 7:03 am and sunset at 5:08 pm EST.
Sunshine
The average sunshine in January 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 West Sayville. A UV Index reading of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: A daily maximum UV index of 2 in January translates into the following instructions:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. When the Sun is at its strongest around midday, find shade and limit exposure. Stay sun-safe with clothing that is both closely woven and worn loosely. Guard yourself! Snow reflection can almost double the UV radiation from the Sun.
Frequently asked questions
What is the coldest time of year in West Sayville?
How cold is it in West Sayville in January?
What is the average humidity in January in West Sayville?
What is the driest month in West Sayville?
How much does it rain in West Sayville in January?
How many days does it snow in January in West Sayville?
What is the ocean temperature in January in West Sayville?
What is the average length of the day in January in West Sayville?
When are sunrise and sunset in January in West Sayville?
How many hours of sunshine does West Sayville have in January?
What are the months with the lowest UV index in West Sayville?
How high is the UV index in January in West Sayville?
Average temperature in January
West Sayville, NY
- Average high temperature in January: 37.9°F
The warmest month (with the highest average high temperature) is August (78.1°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in January: 30.2°F
The month with the highest average low temperature is August (71.8°F).
The coldest month (with the lowest average low temperature) is January (30.2°F).
Average pressure in January
West Sayville, NY
- Average pressure in January: 30.04"Hg
The month with the highest atmospheric pressure is November (30.09"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).
Average wind speed in January
West Sayville, NY
- Average wind speed in January: 13.8mph
The windiest month (with the highest average wind speed) is January (13.8mph).
The calmest months (with the lowest average wind speed) are July and August (9mph).
Average humidity in January
West Sayville, NY
- Average humidity in January: 72%
The months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in January
West Sayville, NY
- Average rainfall in January: 2.17"
The wettest month (with the highest rainfall) is December (3.74").
The driest month (with the least rainfall) is January (2.17").
Average rainfall days in January
West Sayville, NY
- Average rainfall days in January: 8.3 days
The month with the highest number of rainy days is July (17.7 days).
The month with the least rainy days is January (8.3 days).
Average snowfall in January
West Sayville, NY
- Average snowfall in January: 1.38"
The month with the highest snowfall is March (2.13").
The months with the least snowfall are April, June, July, August, September and November (0").
Average snowfall days in January
West Sayville, NY
- Average snowfall days in January: 4.3 days
The month with the highest number of snowfall days is February (4.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in January
West Sayville, NY
- Average sea temperature in January: 42.3°F
The best month for swimming (with the highest average sea temperature) is August (74°F).
The coldest month (with the lowest average sea temperature) is February (39.7°F).
Average daylight in January /
Average sunshine in January
West Sayville, NY
- Average daylight in January: 9h and 4min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in January: 5h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
West Sayville, NY
- Average sunshine days in January: 18.4 days
The month with the most sunshine days is November (18.8 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in January
West Sayville, 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
West Sayville, 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 27).
Average visibility in January
West Sayville, 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).
West Sayville, New York, USA
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