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
The coldest temperatures occur during December, when averages reach a peak of 28.4°F (-2°C) and a low of 16.7°F (-8.5°C).Humidity
The average relative humidity in December in Ravalli is 88%.Rainfall
In Ravalli, in December, it is raining for 9.8 days, with typically 1.06" (27mm) of accumulated precipitation. In Ravalli, Montana, during the entire year, the rain falls for 129.9 days and collects up to 13.5" (343mm) of precipitation.Snowfall
Months with snowfall in Ravalli are January through May, September through December. In Ravalli, during December, snow falls for 14.5 days and regularly aggregates up to 5.39" (137mm) of snow. In Ravalli, Montana, during the entire year, snow falls for 67.1 days and aggregates up to 28.27" (718mm) of snow.Daylight
December has the shortest days of the year in Ravalli, with an average of 8h and 36min of daylight.On the first day of December, sunrise is at 8:03 am and sunset at 4:48 pm. On the last day of the month, sunrise is at 8:23 am and sunset at 4:56 pm MST.
Sunshine
In December, the average sunshine in Ravalli is 5.1h.UV index
February and December, with an average maximum UV index of 1, are months with the lowest UV index. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for the average person.Note: In December, a regular UV index of 1 translates into these guidelines:
Children, babies, and those with sensitive skin should always be shielded from long periods of sun exposure. The Sun is at its harshest during midday; protect yourself by staying in shaded areas and minimizing exposure. Clothes that are both tight-knit and comfortably loose are prime choices for sun protection. Be aware! The intensity of the Sun's UV radiation can be amplified nearly twice due to snow reflection.
Frequently asked questions
What part of the year is the coldest in Ravalli?
How cold is it in Ravalli in December?
What is the average humidity in December in Ravalli?
How many days does it rain in December in Ravalli?
How many days does it snow in December in Ravalli?
What is the month with the shortest days in Ravalli?
What is the average length of the day in December in Ravalli?
When is the sunrise / sunset in December in Ravalli?
How long on average sun shines in December in Ravalli?
When is the lowest UV index in Ravalli?
How high is the UV index in December in Ravalli?
Average temperature in December
Ravalli, MT
- Average high temperature in December: 28.4°F
The warmest month (with the highest average high temperature) is July (79.7°F).
The month with the lowest average high temperature is December (28.4°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is August (49.5°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in December
Ravalli, MT
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.18"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in December
Ravalli, MT
- Average wind speed in December: 3.9mph
The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest months (with the lowest average wind speed) are January, August and December (3.9mph).
Average humidity in December
Ravalli, MT
- Average humidity in December: 88%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is August (49%).
Average rainfall in December
Ravalli, MT
- Average rainfall in December: 1.06"
The wettest month (with the highest rainfall) is June (2.2").
The driest months (with the least rainfall) are July and August (0.63").
Average rainfall days in December
Ravalli, MT
- Average rainfall days in December: 9.8 days
The month with the highest number of rainy days is June (15.7 days).
The month with the least rainy days is August (7.4 days).
Average snowfall in December
Ravalli, MT
- Average snowfall in December: 5.39"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Ravalli, MT
- Average snowfall days in December: 14.5 days
The month with the highest number of snowfall days is December (14.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Ravalli, MT
- Average daylight in December: 8h and 4min
The month with the longest days is June (Average daylight: 15h and 54min).
The month with the shortest days is December (Average daylight: 8h and 36min).
- Average sunshine in December: 5h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 48min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in December
Ravalli, MT
- Average sunshine days in December: 13.5 days
The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is February (11 days).
Average UV index in December
Ravalli, MT
- Average UV index in December: 1
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are February and December (UV index 1).
Average cloud cover in December
Ravalli, MT
- Average cloud cover in December: 49
The month with the most cloud cover is February (Cloud cover 52).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Ravalli, MT
- Average visibility in December: 4mi
The months with the highest visibility are April, May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
Ravalli, Montana, USA
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