May weather forecastSuperior, IA
May
Weather in May
May, the last month of the spring in Superior, is a refreshing month, with an average temperature fluctuating between 50.9°F (10.5°C) and 67.6°F (19.8°C).Temperature
The start of May brings a rise in the average high-temperature, moving from a cool 54.9°F (12.7°C) in April to a comfortable 67.6°F (19.8°C). Superior experiences an average temperature drop to a cool 50.9°F (10.5°C) during May nights.Humidity
In Superior, the average relative humidity in May is 70%.Rainfall
In May, the rain falls for 17.6 days. Throughout May, 3.35" (85mm) of precipitation is accumulated. In Superior, during the entire year, the rain falls for 124.6 days and collects up to 24.37" (619mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.8 snowfall days, in May, Superior aggregates 0.2" (5mm) of snow. In Superior, during the entire year, snow falls for 47.4 days and aggregates up to 21.93" (557mm) of snow.Daylight
In May, the average length of the day is 14h and 43min.On the first day of the month, sunrise is at 6:11 am and sunset at 8:22 pm. On the last day of May, sunrise is at 5:41 am and sunset at 8:53 pm CDT.
Sunshine
In Superior, the average sunshine in May is 8.5h.UV index
The average daily maximum UV index in May in Superior is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unprotected exposure to Sun's UV rays for the average person.Note: An average maximum UV index of 5 in May leads to these recommendations:
Prioritize safety - Recommendations to avert sunburn are shared. Minimize direct exposure to the Sun during midday when its radiation is at its peak. For excellent sun protection for the eyes, ears, face, and neck, consider a wide-brim hat. Notice! The UV radiation of the Sun can be intensified nearly twofold due to the reflective quality of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Superior, IA
- Average high temperature in May: 67.6°F
The warmest month (with the highest average high temperature) is July (80.2°F).
The month with the lowest average high temperature is January (22.5°F).
- Average low temperature in May: 50.9°F
The month with the highest average low temperature is July (62.2°F).
The coldest month (with the lowest average low temperature) is January (9.3°F).
Average pressure in May
Superior, IA
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Superior, IA
- Average wind speed in May: 9.8mph
The windiest months (with the highest average wind speed) are January, February and April (11.2mph).
The calmest month (with the lowest average wind speed) is July (7.8mph).
Average humidity in May
Superior, IA
- Average humidity in May: 70%
The month with the highest relative humidity is January (88%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
Superior, IA
- Average rainfall in May: 3.35"
The wettest month (with the highest rainfall) is June (3.9").
The driest month (with the least rainfall) is January (0.83").
Average rainfall days in May
Superior, IA
- Average rainfall days in May: 17.6 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (2.1 days).
Average snowfall in May
Superior, IA
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (5.47").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Superior, IA
- Average snowfall days in May: 0.8 days
The month with the highest number of snowfall days is December (10.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Superior, IA
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 8h and 30min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 3h and 54min).
Average sunshine days in May
Superior, IA
- Average sunshine days in May: 11 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (8.6 days).
Average UV index in May
Superior, IA
- Average UV index in May: 5
The months with the highest UV index are June and July (UV index 6).
The months with the lowest UV index are January, February and November (UV index 1).
Average cloud cover in May
Superior, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 59).
The month with the least cloud cover is July (Cloud cover 31).
Average visibility in May
Superior, IA
- 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).
