December weather forecast
Sydney, ND

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Weather in December

The first month of the winter, December, is still a freezing cold month in Sydney, North Dakota, with an average temperature varying between 21.2°F (-6°C) and 10.2°F (-12.1°C).

Temperature

December brings with it a considerable temperature decrease, with average high-temperatures dropping from November's cold 37.4°F (3°C) to a subzero cold 21.2°F (-6°C). During December, Sydney witnesses a consistent average low-temperature of 10.2°F (-12.1°C).

Humidity

The average relative humidity in December is 88%.

Rainfall

In Sydney, North Dakota, during December, the rain falls for 2.3 days and regularly aggregates up to 0.87" (22mm) of precipitation. In Sydney, North Dakota, during the entire year, the rain falls for 96.6 days and collects up to 16.77" (426mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. December is the month with the most snowfall in Sydney. Snow falls for 13.3 days and accumulates 4.69" (119mm) of snow.

Daylight

The month with the shortest days is December, with an average of 8h and 36min of daylight.
On the first day of the month, sunrise is at 7:59 am and sunset at 4:48 pm. On the last day of December, sunrise is at 8:19 am and sunset at 4:57 pm CST.

Sunshine

The average sunshine in December is 3.7h.

UV index

The average daily maximum UV index in December in Sydney is 2. A UV Index value of 2, and less, symbolizes a low threat to health from unsafe exposure to UV radiation for average individuals.
Note: The UV index of 2 in December translates into these instructions:
Though extended exposure to the sun typically does not concern most people, it is crucial to always shield children, infants, and those with sensitive skin. When the Sun's UV radiation is most intense during midday, it's best to find shade and limit exposure. Wearing sunglasses with both UVA and UVB protection effectively reduces sun-induced eye damage. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.
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Frequently asked questions

How cold is it in Sydney in December?

December temperatures in Sydney, North Dakota, vary between a high-temperature of 21.2°F (-6°C) and a low-temperature of 10.2°F (-12.1°C). The average heat index (a.k.a. 'real feel', 'feels like'), which represents the influence of relative humidity on air temperature, in August is evaluated at 82.4°F (28°C).

What is the average humidity in December in Sydney?

In Sydney, the average relative humidity in December is 88%.

How much does it rain in Sydney in December?

In Sydney, in December, it is raining for 2.3 days, with typically 0.87" (22mm) of accumulated precipitation.

When does it snow the most in Sydney?

The month with the most snowfall in Sydney, North Dakota, is December, when snow falls for 13.3 days and typically aggregates up to 4.69" (119mm) of snow.

How many days does it snow in December in Sydney?

In Sydney, North Dakota, in December, during 13.3 snowfall days, 4.69" (119mm) of snow is typically accumulated.

What is the month with the shortest days in Sydney?

December has the shortest days of the year, with an average of 8h and 36min of daylight.

How many hours of daylight does Sydney have in December?

The average day length in December is 8h and 37min.

What time are sunrise and sunset in December in Sydney?

In December, on the first day of the month, sunrise is at 7:59 am and sunset at 4:48 pm. On the last day of the month, in Sydney, North Dakota, sunrise is at 8:19 am and sunset at 4:57 pm CST.

How long on average sun shines in December in Sydney?

In December, the average sunshine duration in Sydney is 3.7h.

How high is the UV index in December in Sydney?

In December, the average daily maximum UV index is 2. A UV Index reading of 2, and below, represents a low health threat from exposure to Sun's UV rays.
Average humidity
Average rainfall days
Average snowfall days
Average daylight
Average sunshine
Average sunshine days
Average UV index
Average cloud cover
Average visibility

Average temperature in December
Sydney, ND

Average temperature in December - Sydney, ND
  • Average high temperature in December: 21.2°F

The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (17.8°F).

  • Average low temperature in December: 10.2°F

The month with the highest average low temperature is July (60.4°F).
The coldest month (with the lowest average low temperature) is January (3.6°F).

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Average pressure in December
Sydney, ND

Average pressure in December - Sydney, ND
  • Average pressure in December: 30.13"Hg

The month with the highest atmospheric pressure is February (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).

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Average wind speed in December
Sydney, ND

Average wind speed in December - Sydney, ND
  • Average wind speed in December: 10.5mph

The windiest month (with the highest average wind speed) is October (11.2mph).
The calmest month (with the lowest average wind speed) is August (8.5mph).

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Average humidity in December
Sydney, ND

Average humidity in December - Sydney, ND
  • Average humidity in December: 88%

The month with the highest relative humidity is January (90%).
The month with the lowest relative humidity is August (59%).

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Average rainfall in December
Sydney, ND

Average rainfall in December - Sydney, ND
  • Average rainfall in December: 0.87"

The wettest month (with the highest rainfall) is June (2.95").
The driest month (with the least rainfall) is January (0.55").

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Average rainfall days in December
Sydney, ND

Average rainfall days in December - Sydney, ND
  • Average rainfall days in December: 2.3 days

The month with the highest number of rainy days is June (15.8 days).
The month with the least rainy days is February (1.6 days).

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Average snowfall in December
Sydney, ND

Average snowfall in December - Sydney, ND
  • Average snowfall in December: 4.69"

The month with the highest snowfall is December (4.69").
The months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Sydney, ND

Average snowfall days in December - Sydney, ND
  • Average snowfall days in December: 13.3 days

The month with the highest number of snowfall days is December (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).

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Average daylight in December /
Average sunshine in December
Sydney, ND

Average daylight in December / Average sunshine in December - Sydney, ND
  • Average daylight in December: 8h and 4min

The month with the longest days is June (Average daylight: 15h and 48min).
The month with the shortest days is December (Average daylight: 8h and 36min).

  • Average sunshine in December: 3h and 4min

The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 36min).

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Average sunshine days in December
Sydney, ND

Average sunshine days in December - Sydney, ND
  • Average sunshine days in December: 16.7 days

The month with the most sunshine days is September (19.8 days).
The month with the least sunshine days is June (12 days).

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Average UV index in December
Sydney, ND

Average UV index in December - Sydney, ND
  • Average UV index in December: 2

The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).

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Average cloud cover in December
Sydney, ND

Average cloud cover in December - Sydney, ND
  • Average cloud cover in December: 60

The month with the most cloud cover is February (Cloud cover 63).
The months with the least cloud cover are July and August (Cloud cover 24).

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Average visibility in December
Sydney, ND

Average visibility in December - Sydney, ND
  • Average visibility in December: 6mi

The months with the highest visibility are April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and March (5mi).

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Sydney, North Dakota, USA

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