May weather forecastLily, SD
May
Weather in May
The last month of the spring, May, is an enjoyable month in Lily, South Dakota, with temperature in the range of an average high of 64°F (17.8°C) and an average low of 46.6°F (8.1°C).Temperature
As May sets, the average high-temperature shows an increase, moving up from a cool 51.1°F (10.6°C) in April to an enjoyable 64°F (17.8°C). Lily, during May nights, observes an average temperature of 46.6°F (8.1°C).Humidity
In Lily, the average relative humidity in May is 70%.Rainfall
In Lily, during May, the rain falls for 16.5 days and regularly aggregates up to 2.72" (69mm) of precipitation. In Lily, during the entire year, the rain falls for 112.9 days and collects up to 22.09" (561mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Lily, South Dakota. During 0.8 snowfall days, in May, Lily aggregates 0.12" (3mm) of snow. In Lily, during the entire year, snow falls for 68.4 days and aggregates up to 23.74" (603mm) of snow.Daylight
The average length of the day in May is 14h and 53min.On the first day of the month, sunrise is at 6:18 am and sunset at 8:37 pm. On the last day of May, sunrise is at 5:46 am and sunset at 9:10 pm CDT.
Sunshine
In Lily, South Dakota, the average sunshine in May is 8.7h.UV index
In Lily, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a moderate threat to health from unsafe exposure to UV radiation for the average person.Note: In May, the maximum UV index of 4 transforms into these recommendations:
Be vigilant - A duty to shield skin and eyes from injury exists. The Sun's most harmful UV rays are emitted around midday; avoid staying outdoors for long during this time. Always opt for UVA and UVB-resistant sunglasses on radiant days. Keep in mind! Snow's reflective quality 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
Average temperature in May
Lily, SD
- Average high temperature in May: 64°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (18.9°F).
- Average low temperature in May: 46.6°F
The month with the highest average low temperature is July (61.3°F).
The coldest month (with the lowest average low temperature) is January (5°F).
Average pressure in May
Lily, SD
- Average pressure in May: 29.93"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
Lily, SD
- Average wind speed in May: 10.5mph
The windiest month (with the highest average wind speed) is April (11.7mph).
The calmest month (with the lowest average wind speed) is July (8.7mph).
Average humidity in May
Lily, SD
- Average humidity in May: 70%
The month with the highest relative humidity is January (91%).
The month with the lowest relative humidity is September (66%).
Average rainfall in May
Lily, SD
- Average rainfall in May: 2.72"
The wettest month (with the highest rainfall) is July (3.58").
The driest month (with the least rainfall) is November (0.63").
Average rainfall days in May
Lily, SD
- Average rainfall days in May: 16.5 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in May
Lily, SD
- Average snowfall in May: 0.12"
The month with the highest snowfall is December (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Lily, SD
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is January (15.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Lily, SD
- Average daylight in May: 14h and 54min
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: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).
Average sunshine days in May
Lily, SD
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (10.4 days).
Average UV index in May
Lily, SD
- Average UV index in May: 4
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
Lily, SD
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 66).
The months with the least cloud cover are July and August (Cloud cover 27).
Average visibility in May
Lily, SD
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February, March and December (5mi).
