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 rise of average high-temperatures is seen in May, with an increase from a mild 58.5°F (14.7°C) in April to a pleasant 69.4°F (20.8°C). Defiance experiences a consistent average temperature of 52.7°F (11.5°C) throughout the nights in May.Humidity
In May, the average relative humidity is 72%.Rainfall
The month with the most rainfall is May, when the rain falls for 16 days and typically aggregates up to 3.82" (97mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. 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
In Defiance, the average length of the day in May is 14h and 34min.On the first day of May, sunrise is at 6:16 am and sunset at 8:20 pm. On the last day of the month, 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
In Defiance, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for the average person.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Heed the precautions - Protecting the skin and eyes from damage is compulsory. The midday Sun can be harmful due to its potent UV radiation; seek shade and reduce exposure. Fend off the sun's harsh rays with appropriate clothing, a wide-brim hat, and UV-protective sunglasses. Be informed! The Sun's UV radiation can be nearly doubled due to the reflection from snow.
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 rainiest month?
How much does it rain in Defiance in May?
What is the last month it snows?
How many hours of daylight does Defiance have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
How high is the UV index in May?
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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