December weather forecast and climate
Winterthur, DE

Weather in December

The first month of the winter, December, is also a frosty month in Winterthur, Delaware, with average temperature ranging between min 32.7°F (0.4°C) and max 43.7°F (6.5°C).

Temperature

In Winterthur, Delaware, the average high-temperature in December slightly decreases, from a cool 52.2°F (11.2°C) in November, to a chilly 43.7°F (6.5°C). In Winterthur, the average low-temperature is 32.7°F (0.4°C).

Humidity

In Winterthur, the average relative humidity is 77%.

Rainfall

In Winterthur, in December, it is raining for 11.5 days, with typically 3.31" (84mm) of accumulated precipitation. In Winterthur, during the entire year, the rain falls for 168.9 days and collects up to 35.55" (903mm) of precipitation.

Snowfall

January through May, October through December are months with snowfall. In Winterthur, Delaware, during 3.2 snowfall days, 1.54" (39mm) of snow is typically accumulated. Throughout the year, in Winterthur, Delaware, there are 21.9 snowfall days, and 12.05" (306mm) of snow is accumulated.

Daylight

December has the shortest days of the year in Winterthur, with an average of 9.4h of daylight.

Sunshine

In Winterthur, the average sunshine is 5h.

UV index

Months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index value of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
People with sensitive skin, children, and babies should always be protected from prolonged sun exposure. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
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FAQ

What is the temperature in December in Winterthur?

The average high-temperature, in December, in Winterthur, is 43.7°F (6.5°C), while the average low-temperature is 32.7°F (0.4°C).

What is the average humidity in December in Winterthur?

In December, the average relative humidity in Winterthur, Delaware, is 77%.

How much does it rain in Winterthur in December?

In Winterthur, in December, it is raining for 11.5 days, with typically 3.31" (84mm) of accumulated precipitation.

How many days does it snow in December in Winterthur?

In Winterthur, Delaware, during December, snow falls for 3.2 days and regularly aggregates up to 1.54" (39mm) of snow.

What is the month with the shortest days in Winterthur?

With an average of 9.4h of daylight, December has the shortest days of the year in Winterthur, Delaware.

How many hours of daylight does Winterthur have in December?

In December, the average length of the day in Winterthur is 9.4h.

How many hours of sunshine does Winterthur have in December?

In December, the average sunshine in Winterthur is 5h.

When is the lowest UV index in Winterthur?

January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Winterthur, Delaware.

What is the UV index reading in December in Winterthur?

In December, the average daily maximum UV index is 2. A UV Index value of 2, and less, symbolizes a minimal hazard to health from unsafe exposure to the Sun's UV rays.

Average temperature in December
Winterthur, DE

Average temperature in December - Winterthur, DE
  • Average high temperature in December: 43.7°F

The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is January (37°F).

  • Average low temperature in December: 32.7°F

The month with the highest average low temperature is July (68.4°F).
The coldest month (with the lowest average low temperature) is January (25.3°F).

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Average pressure in December
Winterthur, DE

Average pressure in December - Winterthur, DE
  • Average pressure in December: 30.1"

The month with the highest atmospheric pressure is November (30.12").
The month with the lowest atmospheric pressure is June (29.94").

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Average wind speed in December
Winterthur, DE

Average wind speed in December - Winterthur, DE
  • Average wind speed in December: 8mph

The windiest months (with the highest average wind speed) are January, February and March (8.6mph).
The calmest month (with the lowest average wind speed) is August (5.4mph).

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Average humidity in December
Winterthur, DE

Average humidity in December - Winterthur, DE
  • Average humidity in December: 77%

The month with the highest relative humidity is October (78%).
The month with the lowest relative humidity is April (72%).

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Average rainfall in December
Winterthur, DE

Average rainfall in December - Winterthur, DE
  • Average rainfall in December: 3.31"

The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (2.36").

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Average rainfall days in December
Winterthur, DE

Average rainfall days in December - Winterthur, DE
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is May (18.7 days).
The month with the least rainy days is November (8.8 days).

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Average snowfall in December
Winterthur, DE

Average snowfall in December - Winterthur, DE
  • Average snowfall in December: 1.54"

The month with the highest snowfall is March (3.58").
Months with the least snowfall are June, July, August and September (0").

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Average snowfall days in December
Winterthur, DE

Average snowfall days in December - Winterthur, DE
  • Average snowfall days in December: 3.2 days

The month with the highest number of snowfall days is January (6.8 days).
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
Winterthur, DE

Average daylight in December / Average sunshine in December - Winterthur, DE
  • Average daylight in December: 9.4h

The month with the longest days is June (Average daylight: 15h).
The month with the shortest days is December (Average daylight: 9.4h).

  • Average sunshine in December: 5h

The month with the most sunshine is July (Average sunshine: 10.6h).
The month with the least sunshine is February (Average sunshine: 4.9h).

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Average sunshine days in December
Winterthur, DE

Average sunshine days in December - Winterthur, DE
  • Average sunshine days in December: 15.9 days

The month with the most sunshine days is November (18.6 days).
Months with the least sunshine days are May and July (9.8 days).

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Average UV index in December
Winterthur, DE

Average UV index in December - Winterthur, DE
  • Average UV index in December: 2

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

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Average cloud cover in December
Winterthur, DE

Average cloud cover in December - Winterthur, DE
  • Average cloud cover in December: 46

Months with the most cloud cover are February and March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 31).

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Average visibility in December
Winterthur, DE

Average visibility in December - Winterthur, DE
  • Average visibility in December: 6mi

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

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