May weather forecastRockyford, SD
May
Weather in May
The last month of the spring, May, is an enjoyable month in Rockyford, South Dakota, with temperature in the range of an average high of 66.2°F (19°C) and an average low of 46.9°F (8.3°C).Temperature
Rockyford's May weather brings a rise in high-temperatures, moving from a refreshing 55.9°F (13.3°C) in April to a comfortable 66.2°F (19°C). Rockyford's temperature tends to fall to an average low of 46.9°F (8.3°C) during the nights of May.Humidity
In May, the average relative humidity is 62%.Rainfall
The month with the most rainfall is May, when the rain falls for 13.1 days and typically aggregates up to 2.13" (54mm) of precipitation.Snowfall
January through May, September through December are months with snowfall in Rockyford, South Dakota. May is the last month it regularly snows. During 1.2 snowfall days, in May, Rockyford aggregates 2.17" (55mm) of snow. Throughout the year, there are 47.4 snowfall days, and 22.72" (577mm) of snow is accumulated.Daylight
In Rockyford, the average length of the day in May is 14h and 44min.On the first day of May in Rockyford, sunrise is at 5:41 am and sunset at 7:52 pm. On the last day of the month, sunrise is at 5:11 am and sunset at 8:23 pm MDT.
Sunshine
In Rockyford, the average sunshine in May is 9.6h.UV index
In Rockyford, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: The daily high UV index of 5 during May translates into the following recommendations:
Exercise prevention - Protecting skin and eyes from harm is required. Stay safe from the Sun's strongest UV rays by limiting exposure during midday. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Rockyford, SD
- Average high temperature in May: 66.2°F
The warmest month (with the highest average high temperature) is July (87.6°F).
The month with the lowest average high temperature is December (32.4°F).
- Average low temperature in May: 46.9°F
The month with the highest average low temperature is July (65.5°F).
The coldest month (with the lowest average low temperature) is January (18.1°F).
Average pressure in May
Rockyford, SD
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.13"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Rockyford, SD
- Average wind speed in May: 11.4mph
The windiest month (with the highest average wind speed) is April (12.2mph).
The calmest month (with the lowest average wind speed) is August (10.2mph).
Average humidity in May
Rockyford, SD
- Average humidity in May: 62%
The month with the highest relative humidity is January (80%).
The month with the lowest relative humidity is August (48%).
Average rainfall in May
Rockyford, SD
- Average rainfall in May: 2.13"
The wettest month (with the highest rainfall) is May (2.13").
The driest month (with the least rainfall) is January (0.55").
Average rainfall days in May
Rockyford, SD
- Average rainfall days in May: 13.1 days
The month with the highest number of rainy days is May (13.1 days).
The months with the least rainy days are February and December (2.5 days).
Average snowfall in May
Rockyford, SD
- Average snowfall in May: 2.17"
The month with the highest snowfall is February (4.02").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Rockyford, SD
- Average snowfall days in May: 1.2 days
The month with the highest number of snowfall days is February (11.5 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Rockyford, SD
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 9h and 36min
The month with the most sunshine is August (Average sunshine: 11h and 48min).
The month with the least sunshine is February (Average sunshine: 5h and 12min).
Average sunshine days in May
Rockyford, SD
- Average sunshine days in May: 15.5 days
The month with the most sunshine days is September (22.8 days).
The month with the least sunshine days is April (13.2 days).
Average UV index in May
Rockyford, SD
- Average UV index in May: 5
The month with the highest UV index is July (UV index 7).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Rockyford, SD
- Average cloud cover in May: 36
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is August (Cloud cover 16).
Average visibility in May
Rockyford, SD
- 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).
