December weather forecastRonan, MT
December
Weather in December
December, the first month of the winter in Ronan, is also a subzero cold month, with an average temperature varying between 16.7°F (-8.5°C) and 28.6°F (-1.9°C).Temperature
In Ronan, the lowest average temperatures are observed in December, with a high of 28.6°F (-1.9°C) and a low of 16.7°F (-8.5°C).Humidity
In Ronan, the average relative humidity in December is 88%.Rainfall
In Ronan, in December, it is raining for 12.3 days, with typically 1.65" (42mm) of accumulated precipitation. Throughout the year, there are 158.1 rainfall days, and 18.94" (481mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In Ronan, in December, snow falls for 18.3 days, with typically accumulated 9.41" (239mm) of snow. Throughout the year, there are 91.8 snowfall days, and 46.3" (1176mm) of snow is accumulated.Daylight
The month with the shortest days is December, with an average of 8h and 30min of daylight.On the first day of December, sunrise is at 8:04 am and sunset at 4:47 pm. On the last day of the month, sunrise is at 8:24 am and sunset at 4:55 pm MST.
Sunshine
In Ronan, Montana, the average sunshine in December is 4.9h.UV index
The months with the lowest UV index are February and December, with an average maximum UV index of 1. A UV Index estimate of 2, and below, represents a low threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: In December, the UV index of 1 transforms into the following advice:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. When the Sun is at its strongest around midday, find shade and limit exposure. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Ronan, MT
- Average high temperature in December: 28.6°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 (28.6°F).
- Average low temperature in December: 16.7°F
The month with the highest average low temperature is August (48.6°F).
The coldest month (with the lowest average low temperature) is December (16.7°F).
Average pressure in December
Ronan, MT
- Average pressure in December: 30.16"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
Ronan, MT
- Average wind speed in December: 3.9mph
The windiest month (with the highest average wind speed) is April (4.8mph).
The calmest month (with the lowest average wind speed) is December (3.9mph).
Average humidity in December
Ronan, 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 (50%).
Average rainfall in December
Ronan, MT
- Average rainfall in December: 1.65"
The wettest month (with the highest rainfall) is June (2.44").
The driest month (with the least rainfall) is August (0.55").
Average rainfall days in December
Ronan, MT
- Average rainfall days in December: 12.3 days
The month with the highest number of rainy days is April (19.3 days).
The month with the least rainy days is August (6.6 days).
Average snowfall in December
Ronan, MT
- Average snowfall in December: 9.41"
The month with the highest snowfall is February (10.39").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Ronan, MT
- Average snowfall days in December: 18.3 days
The month with the highest number of snowfall days is February (18.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Ronan, MT
- Average daylight in December: 8h and 30min
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 30min).
- Average sunshine in December: 4h and 54min
The month with the most sunshine is July (Average sunshine: 11h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 36min).
Average sunshine days in December
Ronan, MT
- Average sunshine days in December: 10.1 days
The month with the most sunshine days is August (21.8 days).
The month with the least sunshine days is February (7.2 days).
Average UV index in December
Ronan, 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
Ronan, MT
- Average cloud cover in December: 51
The months with the most cloud cover are January and February (Cloud cover 53).
The month with the least cloud cover is August (Cloud cover 14).
Average visibility in December
Ronan, MT
- Average visibility in December: 4mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (4mi).
