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 is the coldest month in Thermopolis, with an average high-temperature of 28.2°F (-2.1°C) and an average low-temperature of 12.9°F (-10.6°C).Humidity
In December, the average relative humidity is 78%.Rainfall
In December, in Thermopolis, the rain falls for 4.3 days. Throughout December, 0.51" (13mm) of precipitation is accumulated. Throughout the year, there are 117.2 rainfall days, and 11.14" (283mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, September through December. In December, in Thermopolis, it is snowing for 9.8 days. Throughout December, 2.83" (72mm) of snow is accumulated. In Thermopolis, during the entire year, snow falls for 51.2 days and aggregates up to 21.3" (541mm) of snow.Daylight
December has the shortest days of the year, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:27 am and sunset at 4:37 pm. On the last day of December, sunrise is at 7:46 am and sunset at 4:46 pm MST.
Sunshine
In December, the average sunshine is 6.5h.UV index
The months with the lowest UV index are January through April, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a minimal health vulnerability from exposure to the Sun's UV radiation for ordinary individuals.Note: The average daily UV index of 2 in December transforms into the following instructions:
It is important to always shield children, babies, and individuals with sensitive skin from prolonged exposure to the sun. Being in direct Sun during midday can be harmful due to intense solar radiation; take precautions. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Mind this! Nearly twice the UV radiation from the Sun can be reflected by the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest in Thermopolis?
How cold is it in Thermopolis in December?
What is the average humidity in December in Thermopolis?
How many days does it rain in December in Thermopolis?
How many days does it snow in December in Thermopolis?
What is the month with the shortest days in Thermopolis?
What is the average length of the day in December in Thermopolis?
What time are sunrise and sunset in December in Thermopolis?
How many hours of sunshine does Thermopolis have in December?
When is the lowest UV index in Thermopolis?
How high is the UV index in December in Thermopolis?
Average temperature in December
Thermopolis, WY
- Average high temperature in December: 28.2°F
The warmest month (with the highest average high temperature) is July (84.9°F).
The month with the lowest average high temperature is December (28.2°F).
- Average low temperature in December: 12.9°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (12.6°F).
Average pressure in December
Thermopolis, WY
- Average pressure in December: 30.17"Hg
The month with the highest atmospheric pressure is January (30.19"Hg).
The month with the lowest atmospheric pressure is June (29.88"Hg).
Average wind speed in December
Thermopolis, WY
- Average wind speed in December: 5.2mph
The windiest month (with the highest average wind speed) is April (7.1mph).
The calmest month (with the lowest average wind speed) is January (5mph).
Average humidity in December
Thermopolis, WY
- Average humidity in December: 78%
The month with the highest relative humidity is January (81%).
The months with the lowest relative humidity are July and August (35%).
Average rainfall in December
Thermopolis, WY
- Average rainfall in December: 0.51"
The wettest month (with the highest rainfall) is May (1.93").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Thermopolis, WY
- Average rainfall days in December: 4.3 days
The month with the highest number of rainy days is May (17 days).
The months with the least rainy days are January and December (4.3 days).
Average snowfall in December
Thermopolis, WY
- Average snowfall in December: 2.83"
The month with the highest snowfall is February (4.57").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Thermopolis, WY
- Average snowfall days in December: 9.8 days
The month with the highest number of snowfall days is February (11.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Thermopolis, WY
- Average daylight in December: 9h and 0min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in December: 6h and 3min
The month with the most sunshine is July (Average sunshine: 11h and 54min).
The month with the least sunshine is February (Average sunshine: 6h and 12min).
Average sunshine days in December
Thermopolis, WY
- Average sunshine days in December: 20.1 days
The month with the most sunshine days is January (20.2 days).
The month with the least sunshine days is May (10.1 days).
Average UV index in December
Thermopolis, WY
- Average UV index in December: 2
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January, February, March, April, November and December (UV index 2).
Average cloud cover in December
Thermopolis, WY
- Average cloud cover in December: 32
The month with the most cloud cover is February (Cloud cover 35).
The months with the least cloud cover are July and August (Cloud cover 14).
Average visibility in December
Thermopolis, WY
- Average visibility in December: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Thermopolis, Wyoming, USA
Weather forecast for your location
2. Allow the app to use your location