Contents
- Weather in January
- Frequently asked questions
- Average temperature in January
- Average pressure in January
- Average wind speed in January
- Average humidity in January
- Average rainfall in January
- Average rainfall days in January
- Average snowfall in January
- Average snowfall days in January
- Average daylight in January
- Average sunshine in January
- Average sunshine days in January
- Average UV index in January
- Average cloud cover in January
- Average visibility in January
Weather in January
Temperature
January, having an average high-temperature of 38.8°F (3.8°C) and an average low-temperature of 25.2°F (-3.8°C), is the coldest month.Humidity
In January, the average relative humidity is 74%.Rainfall
January and February are months with the least rain when the rain falls for 9.5 days and typically aggregates up to 1.97" (50mm) of rain.Snowfall
January through May, November and December are months with snowfall in Blackrock Hills. In Blackrock Hills, during January, snow falls for 5.8 days and regularly aggregates up to 2.68" (68mm) of snow. Throughout the year, in Blackrock Hills, there are 19.1 snowfall days, and 10.04" (255mm) of snow is accumulated.Daylight
In Blackrock Hills, the average length of the day in January is 9h and 47min.On the first day of the month, sunrise is at 7:28 am and sunset at 4:56 pm. On the last day of January, in Blackrock Hills, sunrise is at 7:16 am and sunset at 5:28 pm EST.
Sunshine
With an average of 5h of sunshine, January has the least sunshine of the year.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 unsafe exposure to UV radiation for the ordinary person.Note: A maximum high daily UV index of 2 during January translates into the following directions:
Children must always have sun protection, unlike most people, who can tolerate up to an hour in the sun without any burns. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Warning! The reflection from snow can nearly magnify the Sun's UV radiation twofold.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What time of the year is the coldest?
How cold is January?
What is the average humidity in January?
What is the driest month?
How many days does it rain in January?
How many days does it snow in January?
How many hours of daylight does Blackrock Hills have in January?
When is the sunrise / sunset in January?
What is the month with the least sunshine in Blackrock Hills?
How many hours of sunshine does Blackrock Hills have in January?
What is the month with the lowest UV index?
What is the UV index reading in January?
Average temperature in January
Blackrock Hills, MD
- Average high temperature in January: 38.8°F
The warmest month (with the highest average high temperature) is July (86.5°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in January: 25.2°F
The month with the highest average low temperature is July (66.9°F).
The coldest month (with the lowest average low temperature) is January (25.2°F).
Average pressure in January
Blackrock Hills, MD
- Average pressure in January: 30.11"Hg
The month with the highest atmospheric pressure is November (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.95"Hg).
Average wind speed in January
Blackrock Hills, MD
- Average wind speed in January: 7.6mph
The windiest month (with the highest average wind speed) is March (7.8mph).
The calmest months (with the lowest average wind speed) are July and August (4.8mph).
Average humidity in January
Blackrock Hills, MD
- Average humidity in January: 74%
The months with the highest relative humidity are October and December (78%).
The month with the lowest relative humidity is July (72%).
Average rainfall in January
Blackrock Hills, MD
- Average rainfall in January: 1.97"
The wettest month (with the highest rainfall) is August (3.78").
The driest months (with the least rainfall) are January and February (1.97").
Average rainfall days in January
Blackrock Hills, MD
- Average rainfall days in January: 9.5 days
The month with the highest number of rainy days is May (17.5 days).
The months with the least rainy days are January and November (9.5 days).
Average snowfall in January
Blackrock Hills, MD
- Average snowfall in January: 2.68"
The month with the highest snowfall is March (2.83").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in January
Blackrock Hills, MD
- Average snowfall days in January: 5.8 days
The months with the highest number of snowfall days are January and February (5.8 days).
The months with the least snowfall days are June, July, August, September and October (0 days).
Average daylight in January /
Average sunshine in January
Blackrock Hills, MD
- Average daylight in January: 9h and 5min
The month with the longest days is June (Average daylight: 14h and 54min).
The month with the shortest days is December (Average daylight: 9h and 30min).
- Average sunshine in January: 5h and 0min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is January (Average sunshine: 5h and 0min).
Average sunshine days in January
Blackrock Hills, MD
- Average sunshine days in January: 17.7 days
The month with the most sunshine days is November (19 days).
The month with the least sunshine days is July (11.3 days).
Average UV index in January
Blackrock Hills, MD
- Average UV index in January: 2
The months with the highest UV index are May, June, 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 January
Blackrock Hills, MD
- Average cloud cover in January: 45
The month with the most cloud cover is March (Cloud cover 46).
The month with the least cloud cover is July (Cloud cover 30).
Average visibility in January
Blackrock Hills, MD
- Average visibility in January: 6mi
The months with the highest visibility are January, February, March, April, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is May (5mi).
Blackrock Hills, Maryland, USA
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