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 arrives, Frederick's weather shows an increase in high-temperatures, moving from April's cool 52.2°F (11.2°C) to a refreshing 65.8°F (18.8°C). Frederick, in the month of May, anticipates a consistent average low-temperature of 46.9°F (8.3°C).Humidity
The average relative humidity in May in Frederick is 66%.Rainfall
In Frederick, South Dakota, in May, during 13.2 rainfall days, 2.01" (51mm) of precipitation is typically accumulated. Throughout the year, there are 92.3 rainfall days, and 15.28" (388mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Frederick aggregates 0.04" (1mm) of snow. In Frederick, during the entire year, snow falls for 54.6 days and aggregates up to 15.04" (382mm) of snow.Daylight
The average length of the day in May is 14h and 58min.On the first day of May in Frederick, sunrise is at 6:19 am and sunset at 8:42 pm. On the last day of the month, sunrise is at 5:47 am and sunset at 9:16 pm CDT.
Sunshine
The average sunshine in May is 8.9h.UV index
In May, the average daily maximum UV index in Frederick, South Dakota, is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for average individuals.Note: The UV index of 5 in May translates into these instructions:
Prioritize safety - Recommendations to avert sunburn are shared. The Sun's harshest UV rays are around midday; it's wise to seek shade and limit time outdoors. Safeguard your eyes, ears, and face from sun rays with the aid of a wide-brim hat. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
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?
When are sunrise and sunset in May?
How many hours of sunshine does Frederick have in May?
What is the UV index reading in May?
Average temperature in May
Frederick, SD
- Average high temperature in May: 65.8°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (19.8°F).
- Average low temperature in May: 46.9°F
The month with the highest average low temperature is July (61.7°F).
The coldest month (with the lowest average low temperature) is January (5.4°F).
Average pressure in May
Frederick, SD
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is February (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Frederick, SD
- Average wind speed in May: 9.8mph
The windiest months (with the highest average wind speed) are April and October (10.7mph).
The calmest month (with the lowest average wind speed) is August (8.2mph).
Average humidity in May
Frederick, SD
- Average humidity in May: 66%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are August and September (61%).
Average rainfall in May
Frederick, SD
- Average rainfall in May: 2.01"
The wettest month (with the highest rainfall) is June (2.83").
The driest month (with the least rainfall) is January (0.39").
Average rainfall days in May
Frederick, SD
- Average rainfall days in May: 13.2 days
The month with the highest number of rainy days is June (14.3 days).
The month with the least rainy days is January (1.7 days).
Average snowfall in May
Frederick, SD
- Average snowfall in May: 0.04"
The months with the highest snowfall are January and December (2.76").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Frederick, SD
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is February (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Frederick, SD
- Average daylight in May: 15h and 0min
The month with the longest days is June (Average daylight: 15h and 42min).
The month with the shortest days is December (Average daylight: 8h and 42min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 11h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Frederick, SD
- Average sunshine days in May: 14.8 days
The month with the most sunshine days is November (21.5 days).
The month with the least sunshine days is June (13.8 days).
Average UV index in May
Frederick, SD
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, November and December (UV index 1).
Average cloud cover in May
Frederick, SD
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is August (Cloud cover 24).
Average visibility in May
Frederick, SD
- Average visibility in May: 6mi
The months with the highest visibility are February, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January and March (5mi).
Frederick, South Dakota, USA
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