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
Noticing a change, the average high-temperature during May moves from April's fresh 54°F (12.2°C) to a comfortable 66.2°F (19°C). In May, Onaka experiences an average nighttime temperature of 47.8°F (8.8°C).Humidity
In May, the average relative humidity is 64%.Rainfall
In Onaka, South Dakota, in May, it is raining for 13.7 days, with typically 2.32" (59mm) of accumulated precipitation. Throughout the year, there are 97.8 rainfall days, and 16.65" (423mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Onaka aggregates 0.31" (8mm) of snow. In Onaka, during the entire year, snow falls for 59.7 days and aggregates up to 19.96" (507mm) of snow.Daylight
In May, the average length of the day is 14h and 53min.On the first day of May, sunrise is at 6:25 am and sunset at 8:44 pm. On the last day of the month, sunrise is at 5:53 am and sunset at 9:17 pm CDT.
Sunshine
In Onaka, the average sunshine in May is 9.1h.UV index
In Onaka, the average daily maximum UV index in May is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for the ordinary person.Note: An average UV index of 5 in May transforms into this advice:
Be vigilant - A duty to shield skin and eyes from injury exists. To protect against the Sun's most potent rays, avoid direct exposure around midday. Experience reduced UV exposure by about half when donning a wide-brim hat. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Onaka?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Onaka have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Onaka have in May?
What is the UV index reading in May?
Average temperature in May
Onaka, SD
- Average high temperature in May: 66.2°F
The warmest month (with the highest average high temperature) is July (85.8°F).
The month with the lowest average high temperature is January (22.6°F).
- Average low temperature in May: 47.8°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 (9.1°F).
Average pressure in May
Onaka, SD
- Average pressure in May: 29.92"Hg
The months with the highest atmospheric pressure are January and February (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.84"Hg).
Average wind speed in May
Onaka, SD
- Average wind speed in May: 11mph
The windiest month (with the highest average wind speed) is April (11.8mph).
The calmest month (with the lowest average wind speed) is August (9.7mph).
Average humidity in May
Onaka, SD
- Average humidity in May: 64%
The month with the highest relative humidity is January (88%).
The months with the lowest relative humidity are August and September (56%).
Average rainfall in May
Onaka, SD
- Average rainfall in May: 2.32"
The wettest month (with the highest rainfall) is June (2.8").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in May
Onaka, SD
- Average rainfall days in May: 13.7 days
The month with the highest number of rainy days is June (14.4 days).
The month with the least rainy days is February (1.9 days).
Average snowfall in May
Onaka, SD
- Average snowfall in May: 0.31"
The month with the highest snowfall is February (5.04").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Onaka, SD
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Onaka, SD
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 36min).
The month with the shortest days is December (Average daylight: 8h and 48min).
- Average sunshine in May: 9h and 1min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Onaka, SD
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is November (21.1 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in May
Onaka, SD
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Onaka, SD
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 58).
The months with the least cloud cover are July and August (Cloud cover 22).
Average visibility in May
Onaka, SD
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, August, September, October, November and December (6mi).
The month with the lowest visibility is January (5mi).
Onaka, South Dakota, USA
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