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 mild 58.6°F (14.8°C) in April to a pleasant 69.4°F (20.8°C). Nighttime temperatures hover around an average low of 52.9°F (11.6°C) in May.Humidity
The average relative humidity in May is 74%.Rainfall
May is the month with the most rainfall. Rain falls for 16.1 days and accumulates 4.06" (103mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Dayton aggregates 0.24" (6mm) of snow. Throughout the year, there are 37.8 snowfall days, and 15.39" (391mm) of snow is accumulated.Daylight
In Dayton, the average length of the day in May is 14h and 37min.On the first day of May, sunrise is at 6:10 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:45 pm CDT.
Sunshine
In May, the average sunshine is 8.4h.UV index
The average daily maximum UV index in May is 5. A UV Index of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV radiation for average individuals.Note: The average daily UV index of 5 in May transforms into the following instructions:
Exercise caution. Those with pale skin may experience burns in less than half an hour. Midday is when the Sun's radiation is strongest; avoid prolonged exposure during this time. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Heads up! The UV radiation from the Sun can almost be doubled by snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures?
What is the average humidity in May?
What is the wettest month in Dayton?
How many days does it rain in May?
What is the last month it snows?
How many hours of daylight does Dayton have in May?
When is the sunrise / sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
Average temperature in May
Dayton, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (26.8°F).
- Average low temperature in May: 52.9°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 (13.5°F).
Average pressure in May
Dayton, 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
Dayton, IA
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in May
Dayton, IA
- Average humidity in May: 74%
The month with the highest relative humidity is January (84%).
The month with the lowest relative humidity is October (69%).
Average rainfall in May
Dayton, IA
- Average rainfall in May: 4.06"
The wettest month (with the highest rainfall) is May (4.06").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in May
Dayton, IA
- Average rainfall days in May: 16.1 days
The month with the highest number of rainy days is June (16.7 days).
The month with the least rainy days is February (3.3 days).
Average snowfall in May
Dayton, IA
- Average snowfall in May: 0.24"
The month with the highest snowfall is January (4.29").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Dayton, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (10.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Dayton, 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 12min).
- Average sunshine in May: 8h and 2min
The month with the most sunshine is July (Average sunshine: 10h and 0min).
The month with the least sunshine is January (Average sunshine: 4h and 0min).
Average sunshine days in May
Dayton, IA
- Average sunshine days in May: 13.4 days
The month with the most sunshine days is October (19 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in May
Dayton, 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
Dayton, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 57).
The months with the least cloud cover are July and September (Cloud cover 31).
Average visibility in May
Dayton, 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).
Dayton, Iowa, USA
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