December weather forecast and climate
Riverview, DE

Weather in December

December, the first month of the winter, in Riverview, is still a chilly month, with average temperature varying between 46.4°F (8°C) and 36°F (2.2°C).

Temperature

In December, the average high-temperature marginally drops, from a fresh 54.5°F (12.5°C) in November, to a frosty 46.4°F (8°C). In Riverview, the average low-temperature is 36°F (2.2°C).

Humidity

The average relative humidity in December is 76%.

Rainfall

In Riverview, it is raining for 11.6 days, with typically 3.07" (78mm) of accumulated precipitation. Throughout the year, there are 167.5 rainfall days, and 35.35" (898mm) of precipitation is accumulated.

Snowfall

Months with snowfall in Riverview, Delaware, are January through April, November and December. In Riverview, snow falls for 2.1 days, with typically accumulated 0.94" (24mm) of snow. Throughout the year, in Riverview, there are 12.5 snowfall days, and 5.94" (151mm) of snow is accumulated.

Daylight

December has the shortest days of the year, with an average of 9.5h of daylight.

Sunshine

In Riverview, the average sunshine in December is 5.1h.

UV index

January and December, with an average maximum UV index of 2, are months with the lowest UV index in Riverview. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 2 interpret into the following advice:
Most people can stay in the Sun for up to 1 hour without burning, apart from children that always must be protected from sun exposure. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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 Riverview?

In December, the average high-temperature is 46.4°F (8°C), and the average low-temperature is 36°F (2.2°C).

What is the average humidity in December in Riverview?

The average relative humidity in December in Riverview is 76%.

How much does it rain in Riverview in December?

In December, in Riverview, Delaware, the rain falls for 11.6 days. Throughout December, 3.07" (78mm) of precipitation is accumulated.

How much does it snow in Riverview in December?

In Riverview, Delaware, in December, during 2.1 snowfall days, 0.94" (24mm) of snow is typically accumulated.

What is the month with the shortest days in Riverview?

With an average of 9.5h of daylight, December has the shortest days of the year in Riverview, Delaware.

What is the average length of the day in December in Riverview?

In Riverview, Delaware, the average length of the day in December is 9.5h.

How many hours of sunshine does Riverview have in December?

In December, the average sunshine is 5.1h.

What is the month with the lowest UV index in Riverview?

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

What is the UV index intensity in December in Riverview?

In December, the average daily maximum UV index in Riverview, Delaware, is 2. A UV Index of 2, and less, symbolizes a minimal health vulnerability from the exposure to the Sun's UV radiation.

Average temperature in December
Riverview, DE

Average temperature in December - Riverview, DE
  • Average high temperature in December: 46.4°F

The warmest month (with the highest average high temperature) is July (84.2°F).
The month with the lowest average high temperature is January (40.3°F).

  • Average low temperature in December: 36°F

The month with the highest average low temperature is July (69.8°F).
The coldest month (with the lowest average low temperature) is January (28.8°F).

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Average pressure in December
Riverview, DE

Average pressure in December - Riverview, 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
Riverview, DE

Average wind speed in December - Riverview, DE
  • Average wind speed in December: 9.1mph

The windiest month (with the highest average wind speed) is February (10.1mph).
The calmest month (with the lowest average wind speed) is August (6.3mph).

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Average humidity in December
Riverview, DE

Average humidity in December - Riverview, DE
  • Average humidity in December: 76%

Months with the highest relative humidity are May, August and September (79%).
Months with the lowest relative humidity are January, March, April and November (74%).

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Average rainfall in December
Riverview, DE

Average rainfall in December - Riverview, DE
  • Average rainfall in December: 3.07"

The wettest month (with the highest rainfall) is August (3.9").
The driest month (with the least rainfall) is January (2.13").

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Average rainfall days in December
Riverview, DE

Average rainfall days in December - Riverview, DE
  • Average rainfall days in December: 11.6 days

The month with the highest number of rainy days is July (18.8 days).
The month with the least rainy days is November (9 days).

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Average snowfall in December
Riverview, DE

Average snowfall in December - Riverview, DE
  • Average snowfall in December: 0.94"

The month with the highest snowfall is January (1.93").
Months with the least snowfall are May, June, July, August, September and October (0").

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Average snowfall days in December
Riverview, DE

Average snowfall days in December - Riverview, DE
  • Average snowfall days in December: 2.1 days

The month with the highest number of snowfall days is January (4.3 days).
Months with the least snowfall days are May, June, July, August, September and October (0 days).

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Average daylight in December /
Average sunshine in December
Riverview, DE

Average daylight in December / Average sunshine in December - Riverview, DE
  • Average daylight in December: 9.5h

The month with the longest days is June (Average daylight: 14.9h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in December: 5.1h

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
Riverview, DE

Average sunshine days in December - Riverview, DE
  • Average sunshine days in December: 16.9 days

The month with the most sunshine days is November (19.4 days).
The month with the least sunshine days is July (9.7 days).

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Average UV index in December
Riverview, DE

Average UV index in December - Riverview, 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 and December (UV index 2).

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Average cloud cover in December
Riverview, DE

Average cloud cover in December - Riverview, DE
  • Average cloud cover in December: 45

The month with the most cloud cover is March (Cloud cover 47).
The month with the least cloud cover is July (Cloud cover 30).

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Average visibility in December
Riverview, DE

Average visibility in December - Riverview, 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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