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 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
West Islip's coldest weather arrives in January, when temperatures average a high of 37.9°F (3.3°C) and a low of 30.4°F (-0.9°C).Humidity
In West Islip, New York, the average relative humidity in January is 72%.Rainfall
January is the month with the least rainfall in West Islip. Rain falls for 8.1 days and accumulates 2.2" (56mm) of precipitation.Snowfall
January through April, October through December are months with snowfall. In West Islip, New York, during January, snow falls for 3.8 days and regularly aggregates up to 1.26" (32mm) of snow. Throughout the year, in West Islip, there are 14.4 snowfall days, and 6.06" (154mm) of snow is accumulated.Daylight
In West Islip, the average length of the day in January is 9h and 39min.On the first day of the month, sunrise is at 7:17 am and sunset at 4:36 pm. On the last day of January, sunrise is at 7:04 am and sunset at 5:08 pm EST.
Sunshine
In January, the average sunshine is 5.1h.UV index
The months with the lowest UV index in West Islip, New York, are January through March and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: An average maximum UV index of 2 in January leads to these recommendations:
While most individuals can withstand prolonged sun exposure, it is imperative that babies, children, and those with sensitive skin always be shielded. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in West Islip?
How cold does it get in West Islip in January?
What is the average humidity in January in West Islip?
What is the driest month in West Islip?
How much does it rain in West Islip in January?
How many days does it snow in January in West Islip?
How many hours of daylight does West Islip have in January?
When are sunrise and sunset in January in West Islip?
How many hours of sunshine does West Islip have in January?
When is the lowest UV index in West Islip?
What is the UV index intensity in January in West Islip?
Average temperature in January
West Islip, NY
- Average high temperature in January: 37.9°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (37.9°F).
- Average low temperature in January: 30.4°F
The months with the highest average low temperature are July and August (72°F).
The coldest month (with the lowest average low temperature) is January (30.4°F).
Average pressure in January
West Islip, NY
- Average pressure in January: 30.05"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 Islip, NY
- Average wind speed in January: 13.6mph
The windiest month (with the highest average wind speed) is January (13.6mph).
The calmest month (with the lowest average wind speed) is July (8.9mph).
Average humidity in January
West Islip, NY
- Average humidity in January: 72%
The month with the highest relative humidity is May (78%).
The month with the lowest relative humidity is November (71%).
Average rainfall in January
West Islip, NY
- Average rainfall in January: 2.2"
The wettest month (with the highest rainfall) is July (3.98").
The driest month (with the least rainfall) is January (2.2").
Average rainfall days in January
West Islip, NY
- Average rainfall days in January: 8.1 days
The month with the highest number of rainy days is July (17.3 days).
The month with the least rainy days is January (8.1 days).
Average snowfall in January
West Islip, NY
- Average snowfall in January: 1.26"
The month with the highest snowfall is March (2.17").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in January
West Islip, NY
- Average snowfall days in January: 3.8 days
The month with the highest number of snowfall days is February (4.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in January /
Average sunshine in January
West Islip, 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 Islip, NY
- Average sunshine days in January: 18.5 days
The month with the most sunshine days is November (19.1 days).
The month with the least sunshine days is July (11.4 days).
Average UV index in January
West Islip, 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 Islip, 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 Islip, 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 Islip, New York, USA
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