Contents
- Weather in May
- Frequently asked questions
- Average temperature in May
- Average pressure in May
- Average wind speed in May
- Average humidity in May
- Average rainfall in May
- Average rainfall days in May
- Average snowfall in May
- Average snowfall days in May
- Average daylight in May
- Average sunshine in May
- Average sunshine days in May
- Average UV index in May
- Average cloud cover in May
- Average visibility in May
Weather in May
Temperature
As May sets, the average high-temperature shows an increase, moving up from a refreshing 63.1°F (17.3°C) in April to a pleasant 72.3°F (22.4°C). The nighttime temperature, during May, averages of 56.8°F (13.8°C).Humidity
With an average relative humidity of 77%, May is the most humid month.Rainfall
In May, the rain falls for 18 days. Throughout May, 2.95" (75mm) of precipitation is accumulated. In Harpers Mill, during the entire year, the rain falls for 157.2 days and collects up to 30.47" (774mm) of precipitation.Snowfall
April through October are months without snowfall.Daylight
In May, the average length of the day is 14h and 20min.On the first day of the month, sunrise is at 6:07 am and sunset at 7:59 pm. On the last day of May, sunrise is at 5:42 am and sunset at 8:26 pm EDT.
Sunshine
The average sunshine in May is 9.2h.UV index
May through August, with an average maximum UV index of 6, are months with the highest UV index. A UV Index reading of 6 to 7 represents a high threat to health from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, a daily maximum UV index of 6 leads to the following instructions:
Sidestep overexposure. Individuals with fair complexions risk burning in fewer than 20 minutes. Limit your exposure to the sun's UV radiation, which is strongest between 10 a.m. and 4 p.m., and note that parasols or canopies may not provide full sun protection. Limit sun-induced ocular harm with sunglasses that feature UVA and UVB filtration.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the most humid month?
What is the average humidity in May?
How many days does it rain in May?
When it does not snow?
What is the average length of the day in May?
When are sunrise and sunset in May in Harpers Mill?
How many hours of sunshine does Harpers Mill have in May?
What are the months with the highest UV index?
How high is the UV index in May?
Average temperature in May
Harpers Mill, MD
- Average high temperature in May: 72.3°F
The warmest month (with the highest average high temperature) is July (85.5°F).
The month with the lowest average high temperature is January (38.8°F).
- Average low temperature in May: 56.8°F
The month with the highest average low temperature is July (70.3°F).
The coldest month (with the lowest average low temperature) is January (27.7°F).
Average pressure in May
Harpers Mill, 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 (29.94"Hg).
Average wind speed in May
Harpers Mill, MD
- Average wind speed in May: 7.3mph
The windiest months (with the highest average wind speed) are January, February and March (9.1mph).
The calmest months (with the lowest average wind speed) are July and August (5.8mph).
Average humidity in May
Harpers Mill, MD
- Average humidity in May: 77%
The month with the highest relative humidity is May (77%).
The months with the lowest relative humidity are March, April and July (72%).
Average rainfall in May
Harpers Mill, MD
- Average rainfall in May: 2.95"
The wettest month (with the highest rainfall) is August (4.09").
The driest month (with the least rainfall) is January (1.81").
Average rainfall days in May
Harpers Mill, MD
- Average rainfall days in May: 18 days
The month with the highest number of rainy days is May (18 days).
The months with the least rainy days are January and November (8.4 days).
Average snowfall in May
Harpers Mill, MD
- Average snowfall in May: 0"
The month with the highest snowfall is January (2.09").
The months with the least snowfall are April, May, June, July, August, September and October (0").
Average snowfall days in May
Harpers Mill, MD
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (3.8 days).
The months with the least snowfall days are April, May, June, July, August, September and October (0 days).
Average daylight in May /
Average sunshine in May
Harpers Mill, MD
- Average daylight in May: 14h and 2min
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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 54min).
The month with the least sunshine is February (Average sunshine: 5h and 6min).
Average sunshine days in May
Harpers Mill, MD
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is November (19.9 days).
The months with the least sunshine days are May and July (10.8 days).
Average UV index in May
Harpers Mill, 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, November and December (UV index 2).
Average cloud cover in May
Harpers Mill, MD
- Average cloud cover in May: 42
The month with the most cloud cover is March (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in May
Harpers Mill, MD
- Average visibility in May: 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).
Harpers Mill, Maryland, USA
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