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 moderate 55.9°F (13.3°C) in April to a still refreshing 67.6°F (19.8°C). Iroquois experiences an average temperature drop to a frosty 48.9°F (9.4°C) during May nights.Humidity
The average relative humidity in May in Iroquois, South Dakota, is 68%.Rainfall
In May, the rain falls for 13.6 days. Throughout May, 2.36" (60mm) of precipitation is accumulated. In Iroquois, South Dakota, 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 May, the average length of the day in Iroquois is 14h and 49min.On the first day of May in Iroquois, 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 May, the average sunshine is 9.1h.UV index
The average daily maximum UV index in May in Iroquois is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for average individuals.Note: In May, an average UV index of 5 transforms into the following instructions:
Adopt protective measures - Suggestions to resist sunburn are offered. For skin protection, it's recommended to minimize Sun exposure during its peak hours around midday. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
Frequently asked questions
What are May temperatures in Iroquois?
What is the average humidity in May in Iroquois?
How many days does it rain in May in Iroquois?
When it does not snow in Iroquois?
Does it snow in Iroquois in May?
How many hours of daylight does Iroquois have in May?
When is the sunrise / sunset in May in Iroquois?
How long on average sun shines in May in Iroquois?
How high is the UV index in May in Iroquois?
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 5min
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 1min
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).
Iroquois, South Dakota, USA
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