January weather forecast and climate
Islip, NY

What is the coldest month in Islip?

With an average high-temperature of 37.9°F (3.3°C) and an average low-temperature of 23.4°F (-4.8°C), January is the coldest month in Islip, New York.

What is the temperature in January in Islip?

In Islip, New York, in January, the average high-temperature is 37.9°F (3.3°C), and the average low-temperature is 23.4°F (-4.8°C).

How much does it rain in Islip in January?

In Islip, New York, in January, it is raining for 11 days, with typically 3.6" (92.5mm) of accumulated precipitation.

How much does it snow in Islip in January?

In Islip, New York, in January, snow falls for 3.7 days, with typically accumulated 6.7" (170.2mm) of snow.

What is the sea water temperature in January in Islip?

In January, in Islip, the average sea temperature is 42.3°F (5.7°C). Swimming in 42.3°F (5.7°C) is considered life-threatening. Even a few minutes in 55.4°F (13°C) water is uncomfortable, and swimming below 50°F (10°C) may cause total loss of breathing control and cold shock, depending on a person's physique.
Average temperature in January - Islip, NY
  • Average high temperature in January: 38°F

The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (38°F).

  • Average low temperature in January: 23.3°F

The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (23.3°F).

Average rainfall in January - Islip, NY
  • Average rainfall in January: 3.6"

The wettest month (with the highest rainfall) is March (4.4").
The driest month (with the lowest rainfall) is February (3.3").

Average rainfall days in January - Islip, NY
  • Average rainfall days in January: 11 days

The month with the highest number of rainy days is April (11.3 days).
Months with the lowest number of rainy days are August and October (8.5 days).

Average snowfall in January - Islip, NY
  • Average snowfall in January: 6.7"

The month with the highest snowfall is February (7.1").
Months with the lowest snowfall are May, June, July, August, September and October (0").

Average snowfall days in January - Islip, NY
  • Average snowfall days in January: 3.7 days

The month with the highest number of snowfall days is January (3.7 days).
Months with the lowest number of snowfall days are May, June, July, August, September and October (0 days).

Average sea temperature in January - Islip, 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 - Islip, NY
  • Average daylight in January: 9.7h

The month with the longest days is June (Average daylight: 15.1h).
The month with shortest days is December (Average daylight: 9.3h).

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