May weather forecastBoone, IA
May
Weather in May
May brings the transition from spring to summer in Boone. The climatic changes accompany increased warmth, longer daylight hours, and heavier showers. This month holds the highest average rainfall, standing at 3.23" (82mm), bringing richness to the city’s natural splendor. Notably, the average high temperature nears 70°F (21.1°C), commanding a drastic change from the freezing start of the year. May's balmy weather and gentle showers apart, the city basks in the full bloom of summer's arrival.Temperature
The start of May signals an increase in the average high-temperature, moving from a refreshing 58.6°F (14.8°C) in April to a pleasant 69.4°F (20.8°C). Throughout May, the temperature tends to fall to a consistent average low of 53.1°F (11.7°C).Humidity
The average relative humidity in May in Boone is 75%.Rainfall
In Boone, Iowa, during May, the rain falls for 16.5 days and regularly aggregates up to 3.23" (82mm) of precipitation. Throughout the year, in Boone, there are 123.3 rainfall days, and 20.98" (533mm) of precipitation is accumulated.Snowfall
Months with snowfall in Boone are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Boone aggregates 0.31" (8mm) of snow. In Boone, Iowa, during the entire year, snow falls for 39.9 days and aggregates up to 10.91" (277mm) of snow.Daylight
The average length of the day in May in Boone is 14h and 35min.On the first day of May in Boone, sunrise is at 6:10 am and sunset at 8:14 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:44 pm CDT.
Sunshine
In May, the average sunshine is 8.6h.UV index
In Boone, the average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the ordinary person.Note: The UV index of 5 during May translates into the following guidance:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. Avoiding the Sun during its peak radiation time around midday is a healthy practice. Arm yourself against UV rays' harm with protective apparel and UV-filtering shades. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Boone, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (81.3°F).
The month with the lowest average high temperature is January (26.4°F).
- Average low temperature in May: 53.1°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.1°F).
Average pressure in May
Boone, 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 (29.88"Hg).
Average wind speed in May
Boone, IA
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Boone, IA
- Average humidity in May: 75%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (69%).
Average rainfall in May
Boone, IA
- Average rainfall in May: 3.23"
The wettest month (with the highest rainfall) is June (3.35").
The driest month (with the least rainfall) is January (0.67").
Average rainfall days in May
Boone, IA
- Average rainfall days in May: 16.5 days
The month with the highest number of rainy days is June (17.4 days).
The month with the least rainy days is February (3.2 days).
Average snowfall in May
Boone, IA
- Average snowfall in May: 0.31"
The month with the highest snowfall is February (3.07").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Boone, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (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
Boone, IA
- Average daylight in May: 14h and 36min
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 12min).
- Average sunshine in May: 8h and 36min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Boone, IA
- Average sunshine days in May: 12 days
The month with the most sunshine days is October (19.5 days).
The month with the least sunshine days is June (10.5 days).
Average UV index in May
Boone, 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, October, November and December (UV index 2).
Average cloud cover in May
Boone, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 56).
The month with the least cloud cover is September (Cloud cover 30).
Average visibility in May
Boone, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, July and August (5mi).
