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
The start of May signals an increase in the average high-temperature, moving from a fresh 51.1°F (10.6°C) in April to an enjoyable 64°F (17.8°C). Roslyn records an average nighttime low-temperature of 46.6°F (8.1°C) throughout May.Humidity
In May, the average relative humidity is 70%.Rainfall
In May, the rain falls for 16.5 days. Throughout May, 2.72" (69mm) of precipitation is accumulated. Throughout the year, there are 112.9 rainfall days, and 22.09" (561mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Roslyn. During 0.8 snowfall days, in May, Roslyn aggregates 0.12" (3mm) of snow. In Roslyn, during the entire year, snow falls for 68.4 days and aggregates up to 23.74" (603mm) of snow.Daylight
In May, the average length of the day in Roslyn is 14h and 56min.On the first day of May, sunrise is at 6:16 am and sunset at 8:37 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 9:10 pm CDT.
Sunshine
The average sunshine in May is 8.7h.UV index
In May, the average daily maximum UV index is 4. A UV Index reading of 3 to 5 represents a moderate health risk from unprotected exposure to Sun's UV rays for ordinary individuals.Note: In May, the UV index of 4 transforms into the following advice:
Ensure safety - Recommendations to avert sunburn are presented. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. A wide-brimmed hat is a staple for defending the face, eyes, ears, and neck from the Sun. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the temperature in May?
What is the average humidity in May?
How many days does it rain in May in Roslyn?
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 Roslyn have in May?
What is the UV index intensity in May?
Average temperature in May
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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: 8h and 4min
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
Roslyn, 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
Roslyn, 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
Roslyn, 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
Roslyn, 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).
Roslyn, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location