January weather forecast
Sag Harbor, NY

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Weather in January

January, like December, in Sag Harbor, New York, is another cold winter month, with an average temperature fluctuating between 38.8°F (3.8°C) and 31.3°F (-0.4°C).

Temperature

January, with average temperatures reaching a high of 38.8°F (3.8°C) and a low of 31.3°F (-0.4°C), is the coldest month.

Humidity

In Sag Harbor, the average relative humidity in January is 73%.

Rainfall

In Sag Harbor, during January, the rain falls for 9.1 days and regularly aggregates up to 2.56" (65mm) of precipitation. In Sag Harbor, 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 Sag Harbor. In Sag Harbor, during January, snow falls for 4.2 days and regularly aggregates up to 1.85" (47mm) of snow. In Sag Harbor, New York, during the entire year, snow falls for 13.9 days and aggregates up to 6.61" (168mm) of snow.

Ocean temperature

In January, the average ocean temperature in Sag Harbor is 42.8°F (6°C).
Note: Being in 42.8°F (6°C) waters at 55.4°F (13°C) is discomforting, but anything below 50°F (10°C) can jeopardize breathing and induce cold shock, factoring in physical endurance.

Daylight

The average length of the day in January is 9h and 38min.
On the first day of the month, sunrise is at 7:13 am and sunset at 4:31 pm. On the last day of January, sunrise is at 7:00 am and sunset at 5:04 pm EST.

Sunshine

In January, the average sunshine 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 in Sag Harbor, New York. A UV Index of 2, and less, symbolizes a low health risk from unsafe exposure to UV radiation for ordinary individuals.
Note: In January, the maximum UV index of 2 transforms into these recommendations:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. To mitigate harm from sun exposure, pick sunglasses offering UVA and UVB defense. Pay attention! The reflection of snow can enhance the Sun's UV radiation almost double.
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Frequently asked questions

What is the coldest month in Sag Harbor?

Sag Harbor's coldest month, January, registers temperatures that range from a high of 38.8°F (3.8°C) to a low of 31.3°F (-0.4°C).

How cold is it in Sag Harbor in January?

During January, Sag Harbor experiences an average high-temperature of 38.8°F (3.8°C) and a low-temperature of 31.3°F (-0.4°C).

What is the average humidity in January in Sag Harbor?

In January, the average relative humidity in Sag Harbor is 73%.

How many days does it rain in January in Sag Harbor?

In Sag Harbor, in January, during 9.1 rainfall days, 2.56" (65mm) of precipitation is typically accumulated.

How many days does it snow in January in Sag Harbor?

In Sag Harbor, in January, snow falls for 4.2 days, with typically accumulated 1.85" (47mm) of snow.

What is the ocean temperature in January in Sag Harbor?

In Sag Harbor, New York, in January, the average water temperature is 42.8°F (6°C). 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.

What is the average length of the day in January in Sag Harbor?

In Sag Harbor, New York, the average day length in January is 9h and 38min.

When is the sunrise / sunset in January in Sag Harbor?

On the first day of January, sunrise is at 7:13 am and sunset at 4:31 pm. On the last day of the month, sunrise is at 7:00 am and sunset at 5:04 pm EST.

How long on average sun shines in January in Sag Harbor?

In Sag Harbor, New York, the average sunshine duration in January is 4.9h.

When is the lowest UV index in Sag Harbor?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index in Sag Harbor, New York.

What is the UV index reading in January in Sag Harbor?

The average daily maximum UV index in January is 2. A UV Index estimate of 2, and below, represents a minimal hazard to health from exposure to the Sun's UV radiation.
Today
Tomorrow
Long-term
YearJanuaryFMAMJJASOND
Dec
January
Feb
Average high temperature
45°F 7.2°C
38.8°F 3.8°C
39.6°F 4.2°C
Average low temperature
37.9°F 3.3°C
31.3°F -0.4°C
31.5°F -0.3°C
Average pressure
30.05" 763mmHg
30.03" 763mmHg
30.01" 762mmHg
Average wind speed
15.7mph 25.3km/h
16mph 25.7km/h
15.2mph 24.5km/h
Average max. wind speed
16.7mph 26.9km/h
16.8mph 27km/h
16.1mph 25.9km/h
Average wind speed gusts
22.1mph 35.6km/h
22.6mph 36.4km/h
22.6mph 36.4km/h
Average humidity
74%
73%
74%
Average rainfall
3.82" 97mm
2.56" 65mm
2.56" 65mm
Average rainfall days
12.8
9.1
9.8
Average snowfall
0.91" 23mm
1.85" 47mm
1.46" 37mm
Average snowfall days
2.3
4.2
4
Average sea temperature
49.8°F 9.9°C
42.8°F 6°C
39.8°F 4.3°C
Average daylight
9h 2min
9h 4min
10h 4min
Average sunshine
4h 4min
4h 5min
4h 4min
Average sunshine days
13.7
15.3
12.8
Average UV index
2
2
2
Average cloud cover
52%
48%
50%
Average visibility
6mi 9.7km
6mi 9.7km
6mi 9.7km

Average temperature in January
Sag Harbor, NY

Average temperature in January - Sag Harbor, 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).

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Average pressure in January
Sag Harbor, NY

Average pressure in January - Sag Harbor, 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).

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Average wind speed in January
Sag Harbor, NY

Average wind speed in January - Sag Harbor, 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).

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Average humidity in January
Sag Harbor, NY

Average humidity in January - Sag Harbor, 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%).

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Average rainfall in January
Sag Harbor, NY

Average rainfall in January - Sag Harbor, 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").

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Average rainfall days in January
Sag Harbor, NY

Average rainfall days in January - Sag Harbor, 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).

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Average snowfall in January
Sag Harbor, NY

Average snowfall in January - Sag Harbor, 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").

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Average snowfall days in January
Sag Harbor, NY

Average snowfall days in January - Sag Harbor, 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).

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Average sea temperature in January
Sag Harbor, NY

Average sea temperature in January - Sag Harbor, NY
  • Average sea temperature in January: 42.8°F

The best month for swimming (with the highest average sea temperature) is August (73.3°F).
The coldest month (with the lowest average sea temperature) is February (39.8°F).

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Average daylight in January /
Average sunshine in January
Sag Harbor, NY

Average daylight in January / Average sunshine in January - Sag Harbor, 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).

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Average sunshine days in January
Sag Harbor, NY

Average sunshine days in January - Sag Harbor, 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).

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Average UV index in January
Sag Harbor, NY

Average UV index in January - Sag Harbor, 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).

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Average cloud cover in January
Sag Harbor, NY

Average cloud cover in January - Sag Harbor, 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).

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Average visibility in January
Sag Harbor, NY

Average visibility in January - Sag Harbor, 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).

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Sag Harbor, New York, USA

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