December weather forecast
Riverview, DE

Weather in December

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

Temperature

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

Humidity

In December, the average relative humidity is 76%.

Rainfall

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

Snowfall

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

Daylight

The month with the shortest days in Riverview is December, with an average of 9h and 29min of daylight.
On the first day of December in Riverview, Delaware, sunrise is at 7:01 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:49 pm EST.

Sunshine

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

UV index

The months with the lowest UV index in Riverview are January and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a low health risk from unsafe exposure to UV radiation for the ordinary person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
For the majority, extended sun exposure is not of great concern. Infants and people with sensitive skin must always be protected. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for the eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
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FAQ

What is the temperature in December in Riverview?

The average high-temperature, in December, is 46.4°F (8°C), while the average low-temperature is 36°F (2.2°C). The average heat index (a.k.a. 'real feel', 'apparent temperature'), which combines relative humidity and air temperature, in August is appraised at 89.6°F (32°C).

What is the average humidity in December in Riverview?

In Riverview, the average relative humidity in December is 76%.

How many days does it rain in December in Riverview?

In Riverview, in December, during 11.6 rainfall days, 3.07" (78mm) of precipitation is typically accumulated.

How many days does it snow in December in Riverview?

In Riverview, 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?

December has the shortest days of the year, with an average of 9h and 29min of daylight.

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

In Riverview, Delaware, the average day length in December is 9h and 29min.

What time are sunrise and sunset in December in Riverview?

On the first day of December in Riverview, Delaware, sunrise is at 7:01 am and sunset at 4:40 pm. On the last day of the month, sunrise is at 7:20 am and sunset at 4:49 pm EST.

How many hours of sunshine does Riverview have in December?

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

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

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

How high is the UV index in December in Riverview?

In Riverview, Delaware, the average daily maximum UV index in December is 2. A UV Index estimate of 2, and below, represents a low health threat from unprotected exposure to UV radiation.
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
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"Hg

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

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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%

The months with the highest relative humidity are May, August and September (79%).
The 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").
The 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).
The 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: 9h and 29min

The month with the longest days is June (Average daylight: 14h and 52min).
The month with the shortest days is December (Average daylight: 9h and 29min).

  • Average sunshine in December: 5h and 6min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is February (Average sunshine: 4h and 54min).

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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

The months with the highest UV index are May, June, July and August (UV index 6).
The 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

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

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