December weather forecastStory, WY
December
Weather in December
December, the first month of the winter in Story, is also a subzero cold month, with an average temperature fluctuating between 29.3°F (-1.5°C) and 15.3°F (-9.3°C).Temperature
December's arrival comes with a decrease in the average high-temperature, moving from a cold 39.7°F (4.3°C) in November to a freezing cold 29.3°F (-1.5°C). In the month of December, Story experiences an average low-temperature of 15.3°F (-9.3°C).Humidity
In December, the average relative humidity is 73%.Rainfall
December is the month with the least rainfall. Rain falls for 7.8 days and accumulates 0.75" (19mm) of precipitation.Snowfall
Months with snowfall are January through May, September through December. In Story, in December, during 13.6 snowfall days, 4.41" (112mm) of snow is typically accumulated. Throughout the year, in Story, there are 78.9 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 54min of daylight.On the first day of the month, sunrise is at 7:24 am and sunset at 4:28 pm. On the last day of December, sunrise is at 7:44 am and sunset at 4:37 pm MST.
Sunshine
The average sunshine in December is 6.5h.UV index
The months with the lowest UV index are January through April, October through December, with an average maximum UV index of 2. A UV Index of 2, and less, symbolizes a low health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: The maximum UV index, 2 during December, leads to the following recommendations:
While most can endure approximately an hour in the sun without burning, children always require protection from sunlight. It's recommended to limit sun exposure when its radiation is at its peak during midday. Employ a hat with a wide brim for robust protection, cutting UV exposure by half. Notice this! Nearly double the intensity of the Sun's UV radiation can be caused by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in December
Story, WY
- Average high temperature in December: 29.3°F
The warmest month (with the highest average high temperature) is July (78.8°F).
The month with the lowest average high temperature is February (29.1°F).
- Average low temperature in December: 15.3°F
The month with the highest average low temperature is July (57°F).
The coldest month (with the lowest average low temperature) is February (14.4°F).
Average pressure in December
Story, WY
- Average pressure in December: 30.12"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in December
Story, WY
- Average wind speed in December: 6.6mph
The windiest month (with the highest average wind speed) is April (7.6mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in December
Story, WY
- Average humidity in December: 73%
The month with the highest relative humidity is February (79%).
The month with the lowest relative humidity is August (46%).
Average rainfall in December
Story, WY
- Average rainfall in December: 0.75"
The wettest month (with the highest rainfall) is May (3.43").
The driest month (with the least rainfall) is December (0.75").
Average rainfall days in December
Story, WY
- Average rainfall days in December: 7.8 days
The month with the highest number of rainy days is May (22.3 days).
The month with the least rainy days is November (7.5 days).
Average snowfall in December
Story, WY
- Average snowfall in December: 4.41"
The month with the highest snowfall is April (8.7").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Story, WY
- Average snowfall days in December: 13.6 days
The month with the highest number of snowfall days is February (15.8 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Story, WY
- Average daylight in December: 8h and 54min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in December: 6h and 30min
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 6min).
Average sunshine days in December
Story, WY
- Average sunshine days in December: 14.2 days
The month with the most sunshine days is November (15.2 days).
The month with the least sunshine days is May (5.8 days).
Average UV index in December
Story, 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, October, November and December (UV index 2).
Average cloud cover in December
Story, WY
- Average cloud cover in December: 33
The months with the most cloud cover are February and April (Cloud cover 37).
The month with the least cloud cover is July (Cloud cover 15).
Average visibility in December
Story, 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).
