May weather forecastBlackrock Hills, MD
May
Weather in May
May, the last month of the spring in Blackrock Hills, is a moderately hot month, with an average temperature ranging between max 73.6°F (23.1°C) and min 54.9°F (12.7°C).Temperature
As Blackrock Hills transitions into May, the average high-temperature shows a change, moving from a refreshing 63.5°F (17.5°C) in April to a moderately hot 73.6°F (23.1°C). May in Blackrock Hills sees the temperature falling to a mean low of 54.9°F (12.7°C).Humidity
In May, the average relative humidity in Blackrock Hills is 77%.Rainfall
In Blackrock Hills, during May, the rain falls for 17.5 days and regularly aggregates up to 3.15" (80mm) of precipitation. In Blackrock Hills, during the entire year, the rain falls for 159.4 days and collects up to 30.71" (780mm) of precipitation.Snowfall
Months with snowfall are January through May, November and December. May is the last month it regularly snows. During 0.1 snowfall days, in May, Blackrock Hills aggregates 0.16" (4mm) of snow. Throughout the year, there are 19.1 snowfall days, and 10.04" (255mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 20min.On the first day of the month, sunrise is at 6:09 am and sunset at 8:02 pm. On the last day of May, sunrise is at 5:45 am and sunset at 8:29 pm EDT.
Sunshine
In Blackrock Hills, the average sunshine in May is 8.8h.UV index
The months with the highest UV index are May through August, with an average maximum UV index of 6. A UV Index estimate of 6 to 7 represents a high threat to health from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 6 during May morphs into the following directions:
Take precautions against overexposure. Fair-skinned people may get burned in less than 20 minutes. Between 10 a.m. and 4 p.m., the Sun emits the most powerful UV radiation. Limit direct exposure to the Sun during these hours. For optimum UV protection, wear sun-resistant attire complemented with a hat and quality shades. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Blackrock Hills, MD
- Average high temperature in May: 73.6°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 May: 54.9°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 May
Blackrock Hills, MD
- Average pressure in May: 30.01"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 May
Blackrock Hills, MD
- Average wind speed in May: 6.2mph
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 May
Blackrock Hills, MD
- Average humidity in May: 77%
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 May
Blackrock Hills, MD
- Average rainfall in May: 3.15"
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 May
Blackrock Hills, MD
- Average rainfall days in May: 17.5 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 May
Blackrock Hills, MD
- Average snowfall in May: 0.16"
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 May
Blackrock Hills, MD
- Average snowfall days in May: 0.1 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 May /
Average sunshine in May
Blackrock Hills, MD
- Average daylight in May: 14h and 18min
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 May: 8h and 48min
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 May
Blackrock Hills, MD
- Average sunshine days in May: 11.6 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 May
Blackrock Hills, MD
- Average UV index in May: 6
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 May
Blackrock Hills, MD
- Average cloud cover in May: 44
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 May
Blackrock Hills, MD
- Average visibility in May: 5mi
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).
