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 60.4°F (15.8°C) in April to an agreeable 69.4°F (20.8°C). During May, the temperature in Decatur City is averaged to a low of 53.1°F (11.7°C) at night.Humidity
The average relative humidity in May in Decatur City is 81%.Rainfall
In Decatur City, during May, the rain falls for 17.2 days and regularly aggregates up to 2.8" (71mm) of precipitation. Throughout the year, in Decatur City, Iowa, there are 132.4 rainfall days, and 20.24" (514mm) of precipitation is accumulated.Snowfall
Months with snowfall in Decatur City are January through May, October through December. May is the last month it regularly snows in Decatur City. During 0.2 snowfall days, in May, Decatur City aggregates 0.2" (5mm) of snow. In Decatur City, during the entire year, snow falls for 30.2 days and aggregates up to 10.16" (258mm) of snow.Daylight
In Decatur City, Iowa, the average length of the day in May is 14h and 28min.On the first day of the month, sunrise is at 6:12 am and sunset at 8:12 pm. On the last day of May, sunrise is at 5:46 am and sunset at 8:40 pm CDT.
Sunshine
In May, the average sunshine is 8.6h.UV index
The average daily maximum UV index in May in Decatur City is 5. A UV Index reading of 3 to 5 represents a moderate threat to health from exposure to the Sun's UV rays for ordinary individuals.Note: In May, an average UV index of 5 transforms into the following instructions:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. Limiting sun exposure during midday hours helps in reducing the harmful effects of UV radiation. For minimizing sun-related eye damage, always choose sunglasses with UVA and UVB coverage. Take warning! The intensity of the Sun's UV radiation can be nearly amplified twice due to snow reflection.
Frequently asked questions
What is the average May temperature in Decatur City?
What is the average humidity in May in Decatur City?
How much does it rain in Decatur City in May?
What is the last month it snows in Decatur City?
How many hours of daylight does Decatur City have in May?
When is the sunrise / sunset in May in Decatur City?
How many hours of sunshine does Decatur City have in May?
How high is the UV index in May in Decatur City?
Average temperature in May
Decatur City, IA
- Average high temperature in May: 69.4°F
The warmest month (with the highest average high temperature) is July (83.5°F).
The month with the lowest average high temperature is January (30.6°F).
- Average low temperature in May: 53.1°F
The month with the highest average low temperature is July (66°F).
The coldest month (with the lowest average low temperature) is January (16.9°F).
Average pressure in May
Decatur City, 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 (29.89"Hg).
Average wind speed in May
Decatur City, IA
- Average wind speed in May: 8.6mph
The windiest months (with the highest average wind speed) are January, February and March (10.4mph).
The calmest months (with the lowest average wind speed) are July and August (6.9mph).
Average humidity in May
Decatur City, IA
- Average humidity in May: 81%
The month with the highest relative humidity is June (83%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Decatur City, IA
- Average rainfall in May: 2.8"
The wettest month (with the highest rainfall) is June (3.43").
The driest months (with the least rainfall) are January and December (0.67").
Average rainfall days in May
Decatur City, IA
- Average rainfall days in May: 17.2 days
The month with the highest number of rainy days is June (17.3 days).
The month with the least rainy days is January (4.8 days).
Average snowfall in May
Decatur City, IA
- Average snowfall in May: 0.2"
The month with the highest snowfall is January (2.72").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Decatur City, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (8.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Decatur City, IA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 0min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- 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 24min).
Average sunshine days in May
Decatur City, IA
- Average sunshine days in May: 10.8 days
The month with the most sunshine days is December (20.3 days).
The month with the least sunshine days is June (8.9 days).
Average UV index in May
Decatur City, IA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Decatur City, IA
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in May
Decatur City, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (6mi).
Decatur City, Iowa, USA
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