Contents
- Weather in December
- Frequently asked questions
- Average temperature in December
- Average pressure in December
- Average wind speed in December
- Average humidity in December
- Average rainfall in December
- Average rainfall days in December
- Average snowfall in December
- Average snowfall days in December
- Average daylight in December
- Average sunshine in December
- Average sunshine days in December
- Average UV index in December
- Average cloud cover in December
- Average visibility in December
Weather in December
Temperature
December's onset corresponds with a subtle shift in the average high-temperature, slightly moving from a mild 56.1°F (13.4°C) in November to a chilly 47.5°F (8.6°C). During December, the nighttime temperature averages to an icy 34.9°F (1.6°C).Humidity
March, May and December, with an average relative humidity of 79%, are the most humid months.Rainfall
In Forest Grove, Tennessee, during December, the rain falls for 12.2 days and regularly aggregates up to 2.87" (73mm) of precipitation. In Forest Grove, during the entire year, the rain falls for 174.6 days and collects up to 37.68" (957mm) of precipitation.Snowfall
Months with snowfall are January through April, November and December. In Forest Grove, Tennessee, during December, snow falls for 2.8 days and regularly aggregates up to 0.67" (17mm) of snow. Throughout the year, in Forest Grove, Tennessee, there are 14.9 snowfall days, and 4.06" (103mm) of snow is accumulated.Daylight
The month with the shortest days in Forest Grove, Tennessee, is December, with an average of 9h and 42min of daylight.On the first day of the month, sunrise is at 6:41 am and sunset at 4:32 pm. On the last day of December, in Forest Grove, sunrise is at 6:58 am and sunset at 4:42 pm CST.
Sunshine
The average sunshine in December in Forest Grove, Tennessee, is 4.6h.UV index
The months with the lowest UV index are January, February and December, with an average maximum UV index of 2. A UV Index estimate of 2, and below, represents a minimal health vulnerability from unsafe exposure to UV radiation for average individuals.Note: A maximum daily UV index of 2 during December morphs into the following directions:
Children necessitate constant protection from sunlight, unlike the majority, who can remain under the sun for about an hour without burning. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What is the temperature in December in Forest Grove?
What are the most humid months in Forest Grove?
What is the average humidity in December in Forest Grove?
How many days does it rain in December in Forest Grove?
How many days does it snow in December in Forest Grove?
What is the month with the shortest days in Forest Grove?
What is the average length of the day in December in Forest Grove?
What time are sunrise and sunset in December in Forest Grove?
How long on average sun shines in December in Forest Grove?
What is the month with the lowest UV index in Forest Grove?
How high is the UV index in December in Forest Grove?
Average temperature in December
Forest Grove, TN
- Average high temperature in December: 47.5°F
The warmest month (with the highest average high temperature) is July (87.1°F).
The month with the lowest average high temperature is January (43°F).
- Average low temperature in December: 34.9°F
The month with the highest average low temperature is July (68.5°F).
The coldest month (with the lowest average low temperature) is January (29.3°F).
Average pressure in December
Forest Grove, TN
- Average pressure in December: 30.14"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.96"Hg).
Average wind speed in December
Forest Grove, TN
- Average wind speed in December: 7.9mph
The windiest month (with the highest average wind speed) is February (8.6mph).
The calmest months (with the lowest average wind speed) are July and August (5mph).
Average humidity in December
Forest Grove, TN
- Average humidity in December: 79%
The months with the highest relative humidity are March, May and December (79%).
The month with the lowest relative humidity is October (74%).
Average rainfall in December
Forest Grove, TN
- Average rainfall in December: 2.87"
The wettest month (with the highest rainfall) is July (4.37").
The driest month (with the least rainfall) is September (2.24").
Average rainfall days in December
Forest Grove, TN
- Average rainfall days in December: 12.2 days
The month with the highest number of rainy days is July (19.7 days).
The month with the least rainy days is November (9.7 days).
Average snowfall in December
Forest Grove, TN
- Average snowfall in December: 0.67"
The month with the highest snowfall is February (1.1").
The months with the least snowfall are May, June, July, August, September and October (0").
Average snowfall days in December
Forest Grove, TN
- Average snowfall days in December: 2.8 days
The month with the highest number of snowfall days is January (4.8 days).
The months with the least snowfall days are May, June, July, August, September and October (0 days).
Average daylight in December /
Average sunshine in December
Forest Grove, TN
- Average daylight in December: 9h and 4min
The month with the longest days is June (Average daylight: 14h and 36min).
The month with the shortest days is December (Average daylight: 9h and 42min).
- Average sunshine in December: 4h and 4min
The month with the most sunshine is June (Average sunshine: 10h and 18min).
The month with the least sunshine is February (Average sunshine: 4h and 24min).
Average sunshine days in December
Forest Grove, TN
- Average sunshine days in December: 15.9 days
The month with the most sunshine days is November (18.4 days).
The month with the least sunshine days is July (9.5 days).
Average UV index in December
Forest Grove, TN
- 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, February and December (UV index 2).
Average cloud cover in December
Forest Grove, TN
- Average cloud cover in December: 53
The month with the most cloud cover is February (Cloud cover 54).
The month with the least cloud cover is June (Cloud cover 30).
Average visibility in December
Forest Grove, TN
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Forest Grove, Tennessee, USA
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