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
May brings a temperature increase, with average high-temperatures moving from April's fresh 54.9°F (12.7°C) to a comfortable 67.5°F (19.7°C). Sibley witnesses an average low-temperature of 50.7°F (10.4°C) throughout the month of May.Humidity
The average relative humidity in May in Sibley, Iowa, is 69%.Rainfall
In Sibley, in May, during 16.7 rainfall days, 2.95" (75mm) of precipitation is typically accumulated. Throughout the year, there are 122.3 rainfall days, and 22.24" (565mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Sibley. During 0.3 snowfall days, in May, Sibley aggregates 0.16" (4mm) of snow. Throughout the year, in Sibley, there are 51.6 snowfall days, and 19.69" (500mm) of snow is accumulated.Daylight
The average length of the day in May in Sibley is 14h and 43min.On the first day of the month, sunrise is at 6:14 am and sunset at 8:25 pm. On the last day of May, sunrise is at 5:45 am and sunset at 8:56 pm CDT.
Sunshine
In Sibley, Iowa, the average sunshine in May is 8.7h.UV index
In Sibley, the average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a moderate threat to health from exposure to the Sun's UV radiation for the ordinary person.Note: An average maximum UV index of 5 in May leads to these recommendations:
Exercise prevention - Warding off sunburn is urged. The midday Sun can be dangerous due to its intense radiation; always find shade and reduce exposure. A wide-brimmed hat is a shield, deflecting up to 50% of harmful UV radiation from eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Sibley?
What is the average humidity in May in Sibley?
How many days does it rain in May in Sibley?
What is the last month it snows in Sibley?
What is the average length of the day in May in Sibley?
When is the sunrise / sunset in May in Sibley?
How long on average sun shines in May in Sibley?
How high is the UV index in May in Sibley?
Average temperature in May
Sibley, IA
- Average high temperature in May: 67.5°F
The warmest month (with the highest average high temperature) is July (80.6°F).
The month with the lowest average high temperature is January (22.3°F).
- Average low temperature in May: 50.7°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (9.5°F).
Average pressure in May
Sibley, 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
Sibley, IA
- Average wind speed in May: 9.9mph
The windiest month (with the highest average wind speed) is April (11.3mph).
The calmest month (with the lowest average wind speed) is July (7.9mph).
Average humidity in May
Sibley, IA
- Average humidity in May: 69%
The month with the highest relative humidity is January (89%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
Sibley, IA
- Average rainfall in May: 2.95"
The wettest month (with the highest rainfall) is June (3.7").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in May
Sibley, IA
- Average rainfall days in May: 16.7 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (2.3 days).
Average snowfall in May
Sibley, IA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (4.53").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Sibley, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (12.9 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Sibley, IA
- Average daylight in May: 14h and 4min
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 4min
The month with the most sunshine is July (Average sunshine: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Sibley, IA
- Average sunshine days in May: 13 days
The month with the most sunshine days is November (20.1 days).
The month with the least sunshine days is June (9.1 days).
Average UV index in May
Sibley, 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 and February (UV index 1).
Average cloud cover in May
Sibley, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 58).
The month with the least cloud cover is July (Cloud cover 29).
Average visibility in May
Sibley, 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).
Sibley, Iowa, USA
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