Islip
New York, USA
Long-term weather forecast
Long-term weather forecast

December weather forecast and climate
Islip, NY

Diciembre, the first month of the winter, in Islip, is also a frosty month, with average temperature fluctuating between 43°F (6.1°C) and 28.2°F (-2.1°C).

Temperature

In Islip, New York, the average high-temperature in Diciembre decreases, from a cool 53.2°F (11.8°C) in Noviembre, to a frosty 43°F (6.1°C). In Diciembre, in Islip, the average low-temperature is 28.2°F (-2.1°C).

Rainfall

In Islip, New York, in Diciembre, it is raining for 10.8 days, with typically 4.06" (103.1mm) of accumulated precipitation. Throughout the year, in Islip, there are 118.9 rainfall days, and 46.24" (1174.5mm) of precipitation is accumulated.

Snowfall

Months with snowfall are Enero through Abril, Noviembre and Diciembre. In Islip, snow falls for 2.4 days, with typically accumulated 5.4" (137.2mm) of snow. In Islip, during the entire year, snow falls for 12.3 days, and aggregates up to 24.8" (629.9mm) of snow.

Ocean temperature

In Islip, New York, the average seawater temperature is 48.9°F (9.4°C).
Note: 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.

Daylight

Diciembre has the shortest days of the year in Islip, with an average of 9.3h of daylight.

What is the temperature in Diciembre in Islip?

In Islip, New York, in Diciembre, the average high-temperature is 43°F (6.1°C), and the average low-temperature is 28.2°F (-2.1°C).

How much does it rain in Islip in Diciembre?

In Islip, New York, during Diciembre, the rain falls for 10.8 days and regularly aggregates up to 4.06" (103.1mm) of precipitation.

How much does it snow in Islip in Diciembre?

In Islip, in Diciembre, during 2.4 snowfall days, 5.4" (137.2mm) of snow is typically accumulated.

How cold is the water in Diciembre in Islip?

In Islip, the average seawater temperature in Diciembre is 48.9°F (9.4°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 month with the shortest days in Islip?

The month with the shortest days in Islip is Diciembre, with an average of 9.3h of daylight.

What is the average length of the day in Diciembre in Islip?

In Diciembre, the average length of the day in Islip, New York, is 9.3h.
Average temperature in December - Islip, NY
  • Average high temperature in December: 43°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 December: 28.2°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 December - Islip, NY
  • Average rainfall in December: 4.1"

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 December - Islip, NY
  • Average rainfall days in December: 10.8 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 December - Islip, NY
  • Average snowfall in December: 5.4"

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 December - Islip, NY
  • Average snowfall days in December: 2.4 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 December - Islip, NY
  • Average sea temperature in December: 49°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 December - Islip, NY
  • Average daylight in December: 9.3h

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