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 sets, the average high-temperature shows an increase, moving up from a mild 56.1°F (13.4°C) in April to an enjoyable 66.6°F (19.2°C). An average low-temperature of 49.3°F (9.6°C) is common in Saint Francis during the nights of May.Humidity
In May, the average relative humidity in Saint Francis is 63%.Rainfall
May is the month with the most rainfall. Rain falls for 15.7 days and accumulates 2.6" (66mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows in Saint Francis. During 0.6 snowfall days, in May, Saint Francis aggregates 0.47" (12mm) of snow. Throughout the year, there are 41.1 snowfall days, and 14.53" (369mm) of snow is accumulated.Daylight
In May, the average length of the day in Saint Francis, South Dakota, is 14h and 41min.On the first day of May, sunrise is at 6:35 am and sunset at 8:45 pm. On the last day of the month, sunrise is at 6:06 am and sunset at 9:16 pm CDT.
Sunshine
In May, the average sunshine is 9.4h.UV index
The average daily maximum UV index in May in Saint Francis is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: In May, the maximum UV index of 5 translates into these guidelines:
Undertake precautions - Guarding against sun damage is counselled. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Counter UV radiation's ill effects with clothing designed for sun safety and UV-resistant eyewear. Heed this! Snow reflection can almost augment the UV radiation of the sun by double.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Saint Francis?
What is the average humidity in May in Saint Francis?
What is the rainiest month in Saint Francis?
How much does it rain in Saint Francis in May?
What is the last month it snows in Saint Francis?
How many hours of daylight does Saint Francis have in May?
When are sunrise and sunset in May in Saint Francis?
How many hours of sunshine does Saint Francis have in May?
What is the UV index intensity in May in Saint Francis?
Average temperature in May
Saint Francis, SD
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is July (86.4°F).
The month with the lowest average high temperature is January (31.5°F).
- Average low temperature in May: 49.3°F
The month with the highest average low temperature is July (65.7°F).
The coldest month (with the lowest average low temperature) is January (18.5°F).
Average pressure in May
Saint Francis, SD
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.15"Hg).
The month with the lowest atmospheric pressure is June (29.85"Hg).
Average wind speed in May
Saint Francis, SD
- Average wind speed in May: 12.2mph
The windiest month (with the highest average wind speed) is April (13.1mph).
The calmest months (with the lowest average wind speed) are July and August (10.6mph).
Average humidity in May
Saint Francis, SD
- Average humidity in May: 63%
The month with the highest relative humidity is January (78%).
The month with the lowest relative humidity is September (56%).
Average rainfall in May
Saint Francis, SD
- Average rainfall in May: 2.6"
The wettest month (with the highest rainfall) is May (2.6").
The driest month (with the least rainfall) is January (0.47").
Average rainfall days in May
Saint Francis, SD
- Average rainfall days in May: 15.7 days
The month with the highest number of rainy days is May (15.7 days).
The month with the least rainy days is January (2.4 days).
Average snowfall in May
Saint Francis, SD
- Average snowfall in May: 0.47"
The month with the highest snowfall is December (2.76").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Saint Francis, SD
- Average snowfall days in May: 0.6 days
The month with the highest number of snowfall days is January (9.7 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Saint Francis, SD
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 9h and 2min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 5h and 24min).
Average sunshine days in May
Saint Francis, SD
- Average sunshine days in May: 12.2 days
The month with the most sunshine days is December (20.4 days).
The month with the least sunshine days is June (11.2 days).
Average UV index in May
Saint Francis, 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 2).
Average cloud cover in May
Saint Francis, SD
- Average cloud cover in May: 37
The month with the most cloud cover is February (Cloud cover 44).
The months with the least cloud cover are July, August and September (Cloud cover 21).
Average visibility in May
Saint Francis, 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).
Saint Francis, South Dakota, USA
Weather forecast for your location
2. Allow the app to use your location