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 lowest temperatures are recorded in December, with averages reaching a high of 32.5°F (0.3°C) and a low of 18.7°F (-7.4°C).Humidity
In December, the average relative humidity in Hermosa is 74%.Rainfall
In Hermosa, in December, it is raining for 4.8 days, with typically 0.63" (16mm) of accumulated precipitation. In Hermosa, during the entire year, the rain falls for 118.8 days and collects up to 15.39" (391mm) of precipitation.Snowfall
Months with snowfall in Hermosa, South Dakota, are January through May, September through December. In Hermosa, in December, snow falls for 8.1 days, with typically accumulated 2.64" (67mm) of snow. In Hermosa, during the entire year, snow falls for 50.4 days and aggregates up to 24.41" (620mm) of snow.Daylight
December has the shortest days of the year in Hermosa, South Dakota, with an average of 9h and 0min of daylight.On the first day of the month, sunrise is at 7:07 am and sunset at 4:16 pm. On the last day of December, sunrise is at 7:26 am and sunset at 4:25 pm MST.
Sunshine
In December, the average sunshine is 6h.UV index
The months with the lowest UV index are January, February, November and December, with an average maximum UV index of 2. A UV Index reading of 2, and below, represents a low health risk from exposure to the Sun's UV rays for the average person.Note: In December, an average UV index of 2 transforms into the following instructions:
In contrast to children, who must always be shielded from the sun, most people can tolerate up to an hour of sun exposure without any burns. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Experience reduced UV exposure by about half when donning a wide-brim hat. Take heed! Reflection from the snow can almost amplify the Sun's UV radiation by double.
Frequently asked questions
What is the coldest time of year in Hermosa?
How cold is it in Hermosa in December?
What is the average humidity in December in Hermosa?
How much does it rain in Hermosa in December?
How much does it snow in Hermosa in December?
What is the month with the shortest days in Hermosa?
How many hours of daylight does Hermosa have in December?
What time are sunrise and sunset in December in Hermosa?
How long on average sun shines in December in Hermosa?
When is the lowest UV index in Hermosa?
How high is the UV index in December in Hermosa?
Average temperature in December
Hermosa, SD
- Average high temperature in December: 32.5°F
The warmest month (with the highest average high temperature) is July (84.7°F).
The month with the lowest average high temperature is December (32.5°F).
- Average low temperature in December: 18.7°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is February (17.8°F).
Average pressure in December
Hermosa, SD
- 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 (29.84"Hg).
Average wind speed in December
Hermosa, SD
- Average wind speed in December: 8.9mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in December
Hermosa, SD
- Average humidity in December: 74%
The month with the highest relative humidity is January (77%).
The months with the lowest relative humidity are August and September (50%).
Average rainfall in December
Hermosa, SD
- Average rainfall in December: 0.63"
The wettest month (with the highest rainfall) is May (2.28").
The driest month (with the least rainfall) is January (0.43").
Average rainfall days in December
Hermosa, SD
- Average rainfall days in December: 4.8 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is December (4.8 days).
Average snowfall in December
Hermosa, SD
- Average snowfall in December: 2.64"
The month with the highest snowfall is April (5.43").
The months with the least snowfall are June, July and August (0").
Average snowfall days in December
Hermosa, SD
- Average snowfall days in December: 8.1 days
The month with the highest number of snowfall days is February (10.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in December /
Average sunshine in December
Hermosa, SD
- 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 0min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 54min).
Average sunshine days in December
Hermosa, SD
- Average sunshine days in December: 19.6 days
The month with the most sunshine days is November (20.2 days).
The month with the least sunshine days is May (11 days).
Average UV index in December
Hermosa, SD
- Average UV index in December: 2
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in December
Hermosa, SD
- Average cloud cover in December: 36
The months with the most cloud cover are February and April (Cloud cover 38).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in December
Hermosa, SD
- 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).
Hermosa, South Dakota, USA
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