December weather forecast
Foster, RI

Weather in December

The first month of the winter, December, is still a cold month in Foster, Rhode Island, with an average temperature fluctuating between 28.8°F (-1.8°C) and 39.4°F (4.1°C).

Temperature

In Foster, the average high-temperature in December decreases from a frosty 49.1°F (9.5°C) in November to a wintry 39.4°F (4.1°C). The average low-temperature, in December, is 28.8°F (-1.8°C).

Humidity

In December, the average relative humidity is 78%.

Rainfall

December is the month with the most rainfall in Foster. Rain falls for 11.5 days and accumulates 3.43" (87mm) of precipitation.

Snowfall

January through May, November and December are months with snowfall. In December, in Foster, it is snowing for 5 days. Throughout December, 2.48" (63mm) of snow is accumulated. Throughout the year, in Foster, there are 30.6 snowfall days, and 14.02" (356mm) of snow is accumulated.

Daylight

The month with the shortest days is December, with an average of 9h and 12min of daylight.
On the first day of the month, sunrise is at 6:55 am and sunset at 4:17 pm. On the last day of December, in Foster, sunrise is at 7:14 am and sunset at 4:25 pm EST.

Sunshine

In Foster, the average sunshine in December is 4.8h.

UV index

January through March, November and December, with an average maximum UV index of 2, are months with the lowest UV index in Foster. A UV Index reading of 2, and below, represents a minimal health hazard from exposure to the Sun's UV radiation for the average person.
Note: In December, the average maximum UV index of 2 translate into the following recommendations:
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. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
[Resources]

FAQ

What is the average humidity in December in Foster?

The average relative humidity in December in Foster, Rhode Island, is 78%.

What is the rainiest month in Foster?

December is the month with the most rainfall. Rain falls for 11.5 days and accumulates 3.43" (87mm) of precipitation.

How many days does it rain in December in Foster?

In December, in Foster, the rain falls for 11.5 days. Throughout December, 3.43" (87mm) of precipitation is accumulated.

How much does it snow in Foster in December?

In December, in Foster, it is snowing for 5 days. Throughout December, 2.48" (63mm) of snow is accumulated.

What is the month with the shortest days in Foster?

December has the shortest days of the year in Foster, with an average of 9h and 12min of daylight.

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

The average day length in December is 9h and 12min.

When is the sunrise / sunset in December in Foster?

On the first day of December in Foster, sunrise is at 6:55 am and sunset at 4:17 pm. On the last day of the month, sunrise is at 7:14 am and sunset at 4:25 pm EST.

How long on average sun shines in December in Foster?

In December, the average sunshine duration is 4.8h.

What are the months with the lowest UV index in Foster?

The months with the lowest UV index in Foster are January through March, November and December, with an average maximum UV index of 2.

How high is the UV index in December in Foster?

In Foster, Rhode Island, the average daily maximum UV index in December is 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's 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
Foster, RI

Average temperature in December - Foster, RI
  • Average high temperature in December: 39.4°F

The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is January (33.4°F).

  • Average low temperature in December: 28.8°F

The month with the highest average low temperature is July (63.1°F).
The coldest month (with the lowest average low temperature) is January (21.6°F).

[Resources]

Average pressure in December
Foster, RI

Average pressure in December - Foster, RI
  • Average pressure in December: 30.04"Hg

The month with the highest atmospheric pressure is November (30.08"Hg).
The month with the lowest atmospheric pressure is June (29.93"Hg).

[Resources]

Average wind speed in December
Foster, RI

Average wind speed in December - Foster, RI
  • Average wind speed in December: 8.8mph

The windiest month (with the highest average wind speed) is January (9.3mph).
The calmest month (with the lowest average wind speed) is August (5.9mph).

[Resources]

Average humidity in December
Foster, RI

Average humidity in December - Foster, RI
  • Average humidity in December: 78%

The months with the highest relative humidity are February, June, July, September and October (79%).
The month with the lowest relative humidity is April (73%).

[Resources]

Average rainfall in December
Foster, RI

Average rainfall in December - Foster, RI
  • Average rainfall in December: 3.43"

The wettest month (with the highest rainfall) is December (3.43").
The driest month (with the least rainfall) is September (1.81").

[Resources]

Average rainfall days in December
Foster, RI

Average rainfall days in December - Foster, RI
  • Average rainfall days in December: 11.5 days

The month with the highest number of rainy days is July (17.5 days).
The month with the least rainy days is January (8.3 days).

[Resources]

Average snowfall in December
Foster, RI

Average snowfall in December - Foster, RI
  • Average snowfall in December: 2.48"

The month with the highest snowfall is March (3.7").
The months with the least snowfall are June, July, August, September and October (0").

[Resources]

Average snowfall days in December
Foster, RI

Average snowfall days in December - Foster, RI
  • Average snowfall days in December: 5 days

The month with the highest number of snowfall days is January (7.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).

[Resources]

Average daylight in December /
Average sunshine in December
Foster, RI

Average daylight in December / Average sunshine in December - Foster, RI
  • Average daylight in December: 9h and 12min

The month with the longest days is June (Average daylight: 15h and 10min).
The month with the shortest days is December (Average daylight: 9h and 12min).

  • Average sunshine in December: 4h and 48min

The months with the most sunshine are July and August (Average sunshine: 10h and 12min).
The month with the least sunshine is February (Average sunshine: 4h and 42min).

[Resources]

Average sunshine days in December
Foster, RI

Average sunshine days in December - Foster, RI
  • Average sunshine days in December: 15.8 days

The month with the most sunshine days is November (17.5 days).
The month with the least sunshine days is June (10.6 days).

[Resources]

Average UV index in December
Foster, RI

Average UV index in December - Foster, RI
  • Average UV index in December: 2

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

[Resources]

Average cloud cover in December
Foster, RI

Average cloud cover in December - Foster, RI
  • Average cloud cover in December: 48

The months with the most cloud cover are February and March (Cloud cover 49).
The month with the least cloud cover is August (Cloud cover 34).

[Resources]

Average visibility in December
Foster, RI

Average visibility in December - Foster, RI
  • Average visibility in December: 6mi

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

[Resources]

Weather forecast for your location

1. Click Locate me button
2. Allow the app to use your location
* you will be automatically redirected to the weather forecast for your location