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
An increase in the average high-temperature marks May in Sioux City, moving from April's mild 58.6°F (14.8°C) to an agreeable 70°F (21.1°C). Sioux City observes an average nighttime low-temperature of 52.5°F (11.4°C) during the month of May.Humidity
In Sioux City, the average relative humidity in May is 70%.Rainfall
In Sioux City, during May, the rain falls for 13.5 days and regularly aggregates up to 1.73" (44mm) of precipitation. Throughout the year, there are 102.3 rainfall days, and 12.91" (328mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
The average length of the day in May is 14h and 38min.On the first day of the month, sunrise is at 6:19 am and sunset at 8:26 pm. On the last day of May, sunrise is at 5:50 am and sunset at 8:55 pm CDT.
Sunshine
In Sioux City, the average sunshine in May is 8.9h.UV index
The average daily maximum UV index in May in Sioux City is 5. A UV Index reading of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for the average person.Note: In May, the maximum UV index of 5 suggests these recommendations:
Be vigilant - Suggestions to stave off sun damage are provided. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Combat UV radiation's detrimental effects with sun-safe clothing and UV-blocking eyewear.
Frequently asked questions
What are May temperatures in Sioux City?
What is the average humidity in May in Sioux City?
How many days does it rain in May in Sioux City?
When it does not snow in Sioux City?
Does it snow in Sioux City in May?
What is the average length of the day in May in Sioux City?
What time are sunrise and sunset in May in Sioux City?
How long on average sun shines in May in Sioux City?
What is the UV index intensity in May in Sioux City?
Average temperature in May
Sioux City, IA
- Average high temperature in May: 70°F
The warmest month (with the highest average high temperature) is July (83.8°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in May: 52.5°F
The month with the highest average low temperature is July (64.9°F).
The coldest month (with the lowest average low temperature) is January (13.5°F).
Average pressure in May
Sioux City, IA
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.86"Hg).
Average wind speed in May
Sioux City, IA
- Average wind speed in May: 9.4mph
The windiest month (with the highest average wind speed) is April (11mph).
The calmest month (with the lowest average wind speed) is July (7.5mph).
Average humidity in May
Sioux City, IA
- Average humidity in May: 70%
The month with the highest relative humidity is January (83%).
The month with the lowest relative humidity is October (65%).
Average rainfall in May
Sioux City, IA
- Average rainfall in May: 1.73"
The wettest month (with the highest rainfall) is June (1.85").
The driest months (with the least rainfall) are January and February (0.39").
Average rainfall days in May
Sioux City, IA
- Average rainfall days in May: 13.5 days
The month with the highest number of rainy days is June (14.6 days).
The month with the least rainy days is January (2.6 days).
Average snowfall in May
Sioux City, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (1.77").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Sioux City, IA
- Average snowfall days in May: 0 days
The month with the highest number of snowfall days is January (8.2 days).
The months with the least snowfall days are May, June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Sioux City, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 12min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 5min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 4h and 30min).
Average sunshine days in May
Sioux City, IA
- Average sunshine days in May: 15.3 days
The month with the most sunshine days is January (22.6 days).
The month with the least sunshine days is June (13.1 days).
Average UV index in May
Sioux City, IA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Sioux City, IA
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 25).
Average visibility in May
Sioux City, IA
- 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).
Sioux City, Iowa, USA
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