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
With the onset of May, Frederick sees a temperature rise, with the average high-temperature moving from April's comfortable 62.6°F (17°C) to an agreeable 72.7°F (22.6°C). An average nighttime temperature of 52.7°F (11.5°C) is observed in Frederick during May.Humidity
May, October and December, with an average relative humidity of 79%, are the most humid months.Rainfall
May is the month with the most rainfall in Frederick. Rain falls for 18.6 days and accumulates 3.54" (90mm) of precipitation.Snowfall
January through May, November and December are months with snowfall. May is the last month it regularly snows. During 0.1 snowfall days, in May, Frederick aggregates 0.16" (4mm) of snow. Throughout the year, there are 19.8 snowfall days, and 11.46" (291mm) of snow is accumulated.Daylight
The average length of the day in May is 14h and 22min.On the first day of May, sunrise is at 6:09 am and sunset at 8:03 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:30 pm EDT.
Sunshine
In Frederick, the average sunshine in May is 8.5h.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 rays for the ordinary person.Note: A maximum high daily UV index of 6 during May translates into the following directions:
Adhere to precautions and respect sun safety doctrines. Avoiding sunburn is vital. It's important to stay in the shade and limit exposure to the sun from 10 a.m. to 4 p.m., when UV radiation is most intense, although remember that shade structures may not provide full sun protection. By wearing a generously brimmed hat, you can cut UV radiation exposure significantly. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What are the most humid months?
What is the average humidity in May?
What is the rainiest month?
How many days does it rain in May?
What is the last month it snows?
What is the average length of the day in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Frederick have in May?
When is the highest UV index?
What is the UV index reading in May?
Average temperature in May
Frederick, MD
- Average high temperature in May: 72.7°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (37.6°F).
- Average low temperature in May: 52.7°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (23.7°F).
Average pressure in May
Frederick, 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
Frederick, MD
- Average wind speed in May: 6.1mph
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 (4.7mph).
Average humidity in May
Frederick, MD
- Average humidity in May: 79%
The months with the highest relative humidity are May, October and December (79%).
The month with the lowest relative humidity is July (74%).
Average rainfall in May
Frederick, MD
- Average rainfall in May: 3.54"
The wettest month (with the highest rainfall) is May (3.54").
The driest month (with the least rainfall) is January (1.85").
Average rainfall days in May
Frederick, MD
- Average rainfall days in May: 18.6 days
The month with the highest number of rainy days is May (18.6 days).
The month with the least rainy days is January (8.7 days).
Average snowfall in May
Frederick, MD
- Average snowfall in May: 0.16"
The month with the highest snowfall is January (3.66").
The months with the least snowfall are June, July, August, September and October (0").
Average snowfall days in May
Frederick, MD
- Average snowfall days in May: 0.1 days
The months with the highest number of snowfall days are January and February (6.3 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
Frederick, 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 24min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 36min).
The months with the least sunshine are January and February (Average sunshine: 4h and 48min).
Average sunshine days in May
Frederick, MD
- Average sunshine days in May: 11.1 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is May (11.1 days).
Average UV index in May
Frederick, 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
Frederick, MD
- Average cloud cover in May: 47
The months with the most cloud cover are January, February and March (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 32).
Average visibility in May
Frederick, MD
- Average visibility in May: 5mi
The months with the highest visibility are February, March, April, June, July, August, November and December (6mi).
The months with the lowest visibility are January, May, September and October (5mi).
Frederick, Maryland, USA
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