December weather forecast and climate
Upton, NY

December, the first month of the winter, in Upton, is still a chilly month, with temperature in the range of an average high of 44.8°F (7.1°C) and an average low of 37°F (2.8°C).

Temperature

In December, the average high-temperature slightly decreases, from a cool 52.5°F (11.4°C) in November, to a frosty 44.8°F (7.1°C). The average low-temperature, in Upton, is 37°F (2.8°C).

Humidity

In December, the average relative humidity in Upton is 74%.

Rainfall

The month with the most rainfall in Upton is December when the rain falls for 12.8 days and typically aggregates up to 3.31" (84mm) of precipitation.

Snowfall

Months with snowfall in Upton, New York, are January through April, November and December. In Upton, during 3.4 snowfall days, 0.63" (16mm) of snow is typically accumulated. In Upton, during the entire year, snow falls for 17.9 days, and aggregates up to 4.57" (116mm) of snow.

Daylight

December has the shortest days of the year, with an average of 9.3h of daylight.

Sunshine

The average sunshine in Upton 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 Upton. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to the UV radiation for average individuals.
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 Upton?

The average high-temperature, in December, in Upton, New York, is 44.8°F (7.1°C), while the average low-temperature is 37°F (2.8°C).

What is the average humidity in December in Upton?

The average relative humidity in December in Upton, New York, is 74%.

How many days does it rain in December in Upton?

In Upton, in December, during 12.8 rainfall days, 3.31" (84mm) of precipitation is typically accumulated.

What is the wettest month in Upton?

December is the month with the most rainfall in Upton. Rain falls for 12.8 days and accumulates 3.31" (84mm) of precipitation.

How many days does it snow in December in Upton?

In Upton, in December, snow falls for 3.4 days, with typically accumulated 0.63" (16mm) of snow.

What is the month with the shortest days in Upton?

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

How many hours of daylight does Upton have in December?

The average length of the day in December is 9.3h.

How many hours of sunshine does Upton have in December?

In December, the average sunshine in Upton is 4.9h.

When is the lowest UV index in Upton?

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 Upton?

In Upton, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal hazard to health from the exposure to the Sun's UV radiation.
Average temperature in December - Upton, NY
  • Average high temperature in December: 7.1°C

The warmest month (with the highest average high temperature) is August (25.3°C).
The month with the lowest average high temperature is January (3.7°C).

  • Average low temperature in December: 2.8°C

Months with the highest average low temperature are July and August (21.9°C).
The coldest month (with the lowest average low temperature) is January (-0.8°C).

Average pressure in December - Upton, NY
  • Average pressure in December: 1017.8mbar

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 - Upton, NY
  • Average wind speed in December: 22.6km/h

The windiest month (with the highest average wind speed) is January (23.3km/h).
The calmest month (with the lowest average wind speed) is July (15.4km/h).

Average humidity in December - Upton, NY
  • Average humidity in December: 74%

The month with the highest relative humidity is May (80%).
The month with the lowest relative humidity is November (71%).

Average rainfall in December - Upton, NY
  • Average rainfall in December: 84mm

The wettest month (with the highest rainfall) is December (84mm).
The driest months (with the least rainfall) are January, February and September (51mm).

Average rainfall days in December - Upton, NY
  • Average rainfall days in December: 12.8 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 December - Upton, NY
  • Average snowfall in December: 16mm

The month with the highest snowfall is January (38mm).
Months with the least snowfall are May, June, July, August, September and October (0mm).

Average snowfall days in December - Upton, NY
  • Average snowfall days in December: 3.4 days

The month with the highest number of snowfall days is February (5.4 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

Average daylight in December / Average sunshine in December - Upton, 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: 4.9h

Months with the most sunshine are July and August (Average sunshine: 10.8h).
The month with the least sunshine is February (Average sunshine: 4.8h).

Average sunshine days in December - Upton, NY
  • Average sunshine days in December: 13.5 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 December - Upton, 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 - Upton, NY
  • Average cloud cover in December: 49

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 December - Upton, NY
  • Average visibility in December: 9km

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