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
The coldest temperatures occur during January, when averages reach a peak of 38.7°F (3.7°C) and a low of 30.6°F (-0.8°C).Humidity
The average relative humidity in January in Brookhaven is 73%.Rainfall
January, February and September are months with the least rain in Brookhaven when the rain falls for 10.1 days and typically aggregates up to 2.01" (51mm) of rain.Snowfall
Months with snowfall in Brookhaven are January through April, November and December. January is the month with the most snowfall. Snow falls for 5.3 days and accumulates 1.5" (38mm) of snow.Daylight
The average length of the day in January is 9h and 39min.On the first day of January in Brookhaven, New York, sunrise is at 7:15 am and sunset at 4:34 pm. On the last day of the month, sunrise is at 7:02 am and sunset at 5:07 pm EST.
Sunshine
In Brookhaven, the average sunshine in January is 5.1h.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 estimate of 2, and below, represents a minimal health vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 2 in January translates into the following recommendations:
While sun exposure does not greatly affect most, individuals with fair skin, babies, and children always need vigilant safeguarding. To avoid the Sun's strongest rays, limit exposure around the mid-day period. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! Reflection from snow can magnify the Sun's UV radiation nearly twofold.
Frequently asked questions
What is the coldest month in Brookhaven?
Is January cold in Brookhaven?
What is the average humidity in January in Brookhaven?
What is the driest month in Brookhaven?
How many days does it rain in January in Brookhaven?
When does it snow the most in Brookhaven?
How many days does it snow in January in Brookhaven?
What is the average length of the day in January in Brookhaven?
When are sunrise and sunset in January in Brookhaven?
How many hours of sunshine does Brookhaven have in January?
What is the month with the lowest UV index in Brookhaven?
What is the UV index reading in January in Brookhaven?
Average temperature in January
Brookhaven, NY
- Average high temperature in January: 38.7°F
The warmest month (with the highest average high temperature) is August (77.5°F).
The month with the lowest average high temperature is January (38.7°F).
- Average low temperature in January: 30.6°F
The months with the highest average low temperature are July and August (71.4°F).
The coldest month (with the lowest average low temperature) is January (30.6°F).
Average pressure in January
Brookhaven, 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
Brookhaven, NY
- Average wind speed in January: 14.5mph
The windiest month (with the highest average wind speed) is January (14.5mph).
The calmest months (with the lowest average wind speed) are July and August (9.6mph).
Average humidity in January
Brookhaven, NY
- Average humidity in January: 73%
The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).
Average rainfall in January
Brookhaven, NY
- Average rainfall in January: 2.01"
The wettest month (with the highest rainfall) is December (3.31").
The driest months (with the least rainfall) are January, February and September (2.01").
Average rainfall days in January
Brookhaven, NY
- Average rainfall days in January: 10.1 days
The month with the highest number of rainy days is July (16 days).
The month with the least rainy days is February (9 days).
Average snowfall in January
Brookhaven, NY
- Average snowfall in January: 1.5"
The month with the highest snowfall is January (1.5").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in January
Brookhaven, NY
- Average snowfall days in January: 5.3 days
The month with the highest number of snowfall days is February (5.4 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Brookhaven, 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: 5h and 1min
The months with the most sunshine are July and August (Average sunshine: 10h and 48min).
The month with the least sunshine is February (Average sunshine: 4h and 48min).
Average sunshine days in January
Brookhaven, NY
- Average sunshine days in January: 15.6 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is February (12.8 days).
Average UV index in January
Brookhaven, 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
Brookhaven, NY
- Average cloud cover in January: 45
The month with the most cloud cover is December (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 26).
Average visibility in January
Brookhaven, 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).
Brookhaven, New York, USA
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