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 month when Hillsdale sees the lowest average temperatures, with a high of 34.7°F (1.5°C) and a low of 20.3°F (-6.5°C).Humidity
In December, the average relative humidity in Hillsdale is 63%.Rainfall
In Hillsdale, in December, it is raining for 5.5 days, with typically 0.59" (15mm) of accumulated precipitation. Throughout the year, there are 116 rainfall days, and 14.57" (370mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. In Hillsdale, during December, snow falls for 9.6 days and regularly aggregates up to 2.8" (71mm) of snow. In Hillsdale, Wyoming, during the entire year, snow falls for 62 days and aggregates up to 30.51" (775mm) of snow.Daylight
With an average of 9h and 18min of daylight, December has the shortest days of the year.On the first day of December in Hillsdale, sunrise is at 7:04 am and sunset at 4:29 pm. On the last day of the month, sunrise is at 7:23 am and sunset at 4:39 pm MST.
Sunshine
In Hillsdale, the average sunshine in December is 6.6h.UV index
January, February, November and December, with an average maximum UV index of 2, are months with the lowest UV index. A UV Index value of 2, and less, symbolizes a low threat to health from exposure to the Sun's UV radiation for the average person.Note: The maximum UV index of 2 during December translates into these guidelines:
Many can withstand an hour in the sun without burning, yet children must always have protection against sunlight. The best time to avoid the Sun's harmful UV radiation is during midday when it's most potent. Sun-related eye harm can be minimized with proper sunglasses offering UVA and UVB coverage. Stay alert! Snow's reflective properties can almost double the UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the coldest month?
How cold is December in Hillsdale?
What is the average humidity in December?
How much does it rain in December?
How much does it snow in December?
What is the month with the shortest days?
How many hours of daylight does Hillsdale have in December?
When are sunrise and sunset in December?
How many hours of sunshine does Hillsdale have in December?
What are the months with the lowest UV index?
How high is the UV index in December in Hillsdale?
Average temperature in December
Hillsdale, WY
- Average high temperature in December: 34.7°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is December (34.7°F).
- Average low temperature in December: 20.3°F
The month with the highest average low temperature is July (59.9°F).
The coldest month (with the lowest average low temperature) is December (20.3°F).
Average pressure in December
Hillsdale, WY
- Average pressure in December: 30.13"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in December
Hillsdale, WY
- Average wind speed in December: 13.1mph
The windiest month (with the highest average wind speed) is January (14.2mph).
The calmest month (with the lowest average wind speed) is August (8.7mph).
Average humidity in December
Hillsdale, WY
- Average humidity in December: 63%
The month with the highest relative humidity is February (64%).
The month with the lowest relative humidity is August (43%).
Average rainfall in December
Hillsdale, WY
- Average rainfall in December: 0.59"
The wettest month (with the highest rainfall) is May (2.95").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Hillsdale, WY
- Average rainfall days in December: 5.5 days
The month with the highest number of rainy days is May (17.5 days).
The month with the least rainy days is January (4.7 days).
Average snowfall in December
Hillsdale, WY
- Average snowfall in December: 2.8"
The month with the highest snowfall is March (6.06").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in December
Hillsdale, WY
- Average snowfall days in December: 9.6 days
The month with the highest number of snowfall days is February (11.3 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Hillsdale, WY
- Average daylight in December: 9h and 2min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in December: 6h and 4min
The months with the most sunshine are July and August (Average sunshine: 11h and 36min).
The month with the least sunshine is February (Average sunshine: 6h and 30min).
Average sunshine days in December
Hillsdale, WY
- Average sunshine days in December: 19.5 days
The month with the most sunshine days is January (20.7 days).
The month with the least sunshine days is April (9.3 days).
Average UV index in December
Hillsdale, WY
- Average UV index in December: 2
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Hillsdale, WY
- Average cloud cover in December: 28
The months with the most cloud cover are April and May (Cloud cover 32).
The month with the least cloud cover is September (Cloud cover 18).
Average visibility in December
Hillsdale, WY
- Average visibility in December: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Hillsdale, Wyoming, USA
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