December weather forecast and climate
Middle Island, NY

The first month of the winter, December, is still a chilly month in Middle Island, New York, with average temperature ranging between min 36.5°F (2.5°C) and max 43.9°F (6.6°C).

Temperature

In Middle Island, the average high-temperature in December marginally drops, from a cool 52.3°F (11.3°C) in November, to a frosty 43.9°F (6.6°C). In Middle Island, the average low-temperature is 36.5°F (2.5°C).

Humidity

The average relative humidity is 73%.

Rainfall

The month with the most rainfall is December when the rain falls for 12.1 days and typically aggregates up to 3.82" (97mm) of precipitation.

Snowfall

January through March, May and December are months with snowfall in Middle Island. December is the first month it typically snows. Throughout December, in the average 2.3 snowfall days, it receives 1.14" (29mm) of snow. Throughout the year, there are 14.9 snowfall days, and 5.71" (145mm) of snow is accumulated.

Daylight

The month with the shortest days in Middle Island, New York, is December, with an average of 9.3h of daylight.

Sunshine

The average sunshine in Middle Island is 4.8h.

UV index

Months with the lowest UV index in Middle Island, 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 the exposure to the Sun's UV radiation for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in December in Middle Island?

The average high-temperature, in December, is 43.9°F (6.6°C), while the average low-temperature is 36.5°F (2.5°C).

What is the average humidity in December in Middle Island?

In Middle Island, the average relative humidity in December is 73%.

How many days does it rain in December in Middle Island?

In December, in Middle Island, the rain falls for 12.1 days. Throughout December, 3.82" (97mm) of precipitation is accumulated.

What is the wettest month in Middle Island?

The month with the most rainfall is December when the rain falls for 12.1 days and typically aggregates up to 3.82" (97mm) of precipitation.

When does it start snowing in Middle Island?

December is the first month it typically snows in Middle Island. Throughout December, in the average 2.3 snowfall days, it receives 1.14" (29mm) of snow.

What is the month with the shortest days in Middle Island?

The month with the shortest days in Middle Island, New York, is December, with an average of 9.3h of daylight.

How many hours of daylight does Middle Island have in December?

In Middle Island, New York, the average length of the day in December is 9.3h.

How many hours of sunshine does Middle Island have in December?

In Middle Island, the average sunshine in December is 4.8h.

What is the month with the lowest UV index in Middle Island?

January through March and December, with an average maximum UV index of 2, are months with the lowest UV index.

What is the UV index reading in December in Middle Island?

In Middle Island, the average daily maximum UV index in December is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from unprotected exposure to the UV radiation.
Average temperature in December - Middle Island, NY
  • Average high temperature in December: 6.6°C

The warmest months (with the highest average high temperature) are July and August (25.7°C).
The month with the lowest average high temperature is January (3.3°C).

  • Average low temperature in December: 2.5°C

Months with the highest average low temperature are July and August (21.6°C).
The coldest month (with the lowest average low temperature) is January (-1.4°C).

Average pressure in December - Middle Island, NY
  • Average pressure in December: 1017.9mbar

The month with the highest atmospheric pressure is November (1018.9mbar).
The month with the lowest atmospheric pressure is June (1013.6mbar).

Average wind speed in December - Middle Island, NY
  • Average wind speed in December: 21.2km/h

The windiest month (with the highest average wind speed) is January (21.8km/h).
The calmest month (with the lowest average wind speed) is July (14km/h).

Average humidity in December - Middle Island, NY
  • Average humidity in December: 73%

Months with the highest relative humidity are May and June (78%).
The month with the lowest relative humidity is November (71%).

Average rainfall in December - Middle Island, NY
  • Average rainfall in December: 97mm

The wettest month (with the highest rainfall) is December (97mm).
The driest month (with the least rainfall) is January (57mm).

Average rainfall days in December - Middle Island, NY
  • Average rainfall days in December: 12.1 days

The month with the highest number of rainy days is July (16.5 days).
The month with the least rainy days is January (8 days).

Average snowfall in December - Middle Island, NY
  • Average snowfall in December: 29mm

The month with the highest snowfall is March (55mm).
Months with the least snowfall are April, June, July, August, September, October and November (0mm).

Average snowfall days in December - Middle Island, NY
  • Average snowfall days in December: 2.3 days

The month with the highest number of snowfall days is February (4.6 days).
Months with the least snowfall days are June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Middle Island, NY
  • Average daylight in December: 9.3h

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

  • Average sunshine in December: 4.8h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.7h).

Average sunshine days in December - Middle Island, NY
  • Average sunshine days in December: 16.5 days

The month with the most sunshine days is November (19.3 days).
The month with the least sunshine days is August (12.5 days).

Average UV index in December - Middle Island, NY
  • Average UV index in December: 2

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, March and December (UV index 2).

Average cloud cover in December - Middle Island, NY
  • Average cloud cover in December: 50

The month with the most cloud cover is December (Cloud cover 50).
The month with the least cloud cover is August (Cloud cover 28).

Average visibility in December - Middle Island, NY
  • Average visibility in December: 9km

Months with the highest visibility are June, July, August, September, October and November (10km).
Months with the lowest visibility are January, February, March, April, May and December (9km).