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 arrival of May sees a shift in the average high-temperature, moving from a refreshing 58.5°F (14.7°C) in April to a pleasant 69.4°F (20.8°C). Nighttime temperatures in Defiance hover around an average low of 52.7°F (11.5°C) in May.Humidity
In Defiance, the average relative humidity in May is 72%.Rainfall
May is the month with the most rainfall in Defiance. Rain falls for 16 days and accumulates 3.82" (97mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Defiance. During 0.1 snowfall days, in May, Defiance aggregates 0.12" (3mm) of snow. In Defiance, during the entire year, snow falls for 36.8 days and aggregates up to 14.53" (369mm) of snow.Daylight
The average length of the day in May is 14h and 34min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:20 pm. On the last day of May, in Defiance, sunrise is at 5:48 am and sunset at 8:49 pm CDT.
Sunshine
In Defiance, the average sunshine in May is 8.6h.UV index
The average daily maximum UV index in May in Defiance is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV rays for the ordinary person.Note: The maximum daily UV index of 5 during May translates into the following directions:
Stay alert. Light-skinned people could suffer burns in less than 30 minutes. Avoid the Sun's strongest UV rays by seeking shade and limiting exposure during midday. Sunglasses that guard against UVA and UVB rays are pivotal in minimizing sun-induced ocular damage. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.
Frequently asked questions
What are the temperatures in Defiance in May?
What is the average humidity in May in Defiance?
What is the wettest month in Defiance?
How much does it rain in Defiance in May?
What is the last month it snows in Defiance?
What is the average length of the day in May in Defiance?
What time are sunrise and sunset in May in Defiance?
How many hours of sunshine does Defiance have in May?
How high is the UV index in May in Defiance?
Average temperature in May
Defiance, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (81.7°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in May: 52.7°F
The month with the highest average low temperature is July (64.8°F).
The coldest month (with the lowest average low temperature) is January (14°F).
Average pressure in May
Defiance, 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
Defiance, IA
- Average wind speed in May: 9.4mph
The windiest month (with the highest average wind speed) is April (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.4mph).
Average humidity in May
Defiance, IA
- Average humidity in May: 72%
The month with the highest relative humidity is January (83%).
The months with the lowest relative humidity are April and October (68%).
Average rainfall in May
Defiance, IA
- Average rainfall in May: 3.82"
The wettest month (with the highest rainfall) is May (3.82").
The driest month (with the least rainfall) is January (0.71").
Average rainfall days in May
Defiance, IA
- Average rainfall days in May: 16 days
The month with the highest number of rainy days is June (16.5 days).
The month with the least rainy days is February (3 days).
Average snowfall in May
Defiance, IA
- Average snowfall in May: 0.12"
The month with the highest snowfall is February (3.43").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Defiance, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is January (10.2 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Defiance, 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 4min
The month with the most sunshine is July (Average sunshine: 10h and 18min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Defiance, IA
- Average sunshine days in May: 13.2 days
The month with the most sunshine days is November (20.4 days).
The month with the least sunshine days is June (11.9 days).
Average UV index in May
Defiance, 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 February (UV index 1).
Average cloud cover in May
Defiance, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in May
Defiance, 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).
Defiance, Iowa, USA
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