May weather forecastIroquois, SD
May
Weather in May
The last month of the spring, May, is an enjoyable month in Iroquois, South Dakota, with temperature in the range of an average high of 67.6°F (19.8°C) and an average low of 48.9°F (9.4°C).Temperature
Iroquois's transition into May is marked by a rise in the average high-temperature, advancing from a refreshing 55.9°F (13.3°C) in April to an enjoyable 67.6°F (19.8°C). During May, Iroquois's temperature averages to a chilly 48.9°F (9.4°C) at night.Humidity
In Iroquois, South Dakota, the average relative humidity in May is 68%.Rainfall
In Iroquois, in May, during 13.6 rainfall days, 2.36" (60mm) of precipitation is typically accumulated. In Iroquois, during the entire year, the rain falls for 101.8 days and collects up to 18.19" (462mm) of precipitation.Snowfall
In Iroquois, snow does not fall in May through September.Daylight
In Iroquois, the average length of the day in May is 14h and 49min.On the first day of May, sunrise is at 6:20 am and sunset at 8:36 pm. On the last day of the month, sunrise is at 5:50 am and sunset at 9:08 pm CDT.
Sunshine
In Iroquois, the average sunshine in May is 9.1h.UV index
In May, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for the average person.Note: The UV index of 5 during May leads to these advisories:
Adopt protective measures - It is advised to guard against sun damage. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. Employ a wide-brim hat for potent defense against up to 50% of UV rays. Forewarned is forearmed! The Sun's UV radiation can be almost doubled in intensity by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Iroquois, SD
- Average high temperature in May: 67.6°F
The warmest month (with the highest average high temperature) is July (85.6°F).
The month with the lowest average high temperature is January (23.2°F).
- Average low temperature in May: 48.9°F
The month with the highest average low temperature is July (64.2°F).
The coldest month (with the lowest average low temperature) is January (8.2°F).
Average pressure in May
Iroquois, 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
Iroquois, SD
- Average wind speed in May: 9.8mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest months (with the lowest average wind speed) are July and August (8.6mph).
Average humidity in May
Iroquois, SD
- Average humidity in May: 68%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is September (62%).
Average rainfall in May
Iroquois, SD
- Average rainfall in May: 2.36"
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
Iroquois, SD
- Average rainfall days in May: 13.6 days
The month with the highest number of rainy days is June (15.2 days).
The month with the least rainy days is February (1.8 days).
Average snowfall in May
Iroquois, SD
- Average snowfall in May: 0"
The month with the highest snowfall is February (3.54").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Iroquois, SD
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is December (9.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Iroquois, SD
- Average daylight in May: 14h and 48min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 9h and 6min
The month with the most sunshine is July (Average sunshine: 11h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Iroquois, SD
- Average sunshine days in May: 14.6 days
The month with the most sunshine days is November (21.8 days).
The month with the least sunshine days is June (12.3 days).
Average UV index in May
Iroquois, 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 and November (UV index 1).
Average cloud cover in May
Iroquois, SD
- Average cloud cover in May: 38
The month with the most cloud cover is January (Cloud cover 54).
The month with the least cloud cover is July (Cloud cover 22).
Average visibility in May
Iroquois, 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).
