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
May's arrival brings a temperature shift, moving from a moderate 56.3°F (13.5°C) in April to a pleasant 68.2°F (20.1°C). In May, the nighttime temperature lowers to an average of 51.8°F (11°C).Humidity
In May, the average relative humidity is 76%.Rainfall
In Coster, Iowa, during May, the rain falls for 19 days and regularly aggregates up to 4.69" (119mm) of precipitation. Throughout the year, there are 148.3 rainfall days, and 31.02" (788mm) of precipitation is accumulated.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.2 snowfall days, in May, Coster aggregates 0.35" (9mm) of snow. In Coster, during the entire year, snow falls for 53.2 days and aggregates up to 22.4" (569mm) of snow.Daylight
In May, the average length of the day is 14h and 39min.On the first day of the month, sunrise is at 6:04 am and sunset at 8:11 pm. On the last day of May, sunrise is at 5:35 am and sunset at 8:41 pm CDT.
Sunshine
In May, the average sunshine is 8.5h.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 unsafe exposure to UV radiation for average individuals.Note: The maximum UV index of 5 during May translates into these guidelines:
Exercise caution. The susceptibility of light skin individuals to burns is less than 30 minutes. To protect against the Sun's most potent rays, avoid direct exposure around midday. A wide-brimmed hat provides unparalleled sun protection for sensitive areas like the eyes, ears, and neck. Foresee this! The reflection from snow can nearly double the intensity of UV radiation from the Sun.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Coster have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index intensity in May?
Average temperature in May
Coster, IA
- Average high temperature in May: 68.2°F
The warmest month (with the highest average high temperature) is July (79.9°F).
The month with the lowest average high temperature is January (24.1°F).
- Average low temperature in May: 51.8°F
The month with the highest average low temperature is July (63.3°F).
The coldest month (with the lowest average low temperature) is January (11.8°F).
Average pressure in May
Coster, IA
- Average pressure in May: 29.93"Hg
The months with the highest atmospheric pressure are January and February (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Coster, IA
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is April (10.8mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Coster, IA
- Average humidity in May: 76%
The month with the highest relative humidity is January (87%).
The month with the lowest relative humidity is October (71%).
Average rainfall in May
Coster, IA
- Average rainfall in May: 4.69"
The wettest month (with the highest rainfall) is June (4.76").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in May
Coster, IA
- Average rainfall days in May: 19 days
The month with the highest number of rainy days is June (20.1 days).
The month with the least rainy days is February (4.9 days).
Average snowfall in May
Coster, IA
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (5.51").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Coster, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (13.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Coster, IA
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Coster, IA
- Average sunshine days in May: 9.5 days
The month with the most sunshine days is November (17.4 days).
The month with the least sunshine days is June (7.8 days).
Average UV index in May
Coster, IA
- Average UV index in May: 5
The month with the highest UV index is June (UV index 6).
The month with the lowest UV index is January (UV index 1).
Average cloud cover in May
Coster, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 60).
The months with the least cloud cover are August and September (Cloud cover 31).
Average visibility in May
Coster, IA
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, September, October, November and December (6mi).
The months with the lowest visibility are January, February, July and August (5mi).
Coster, Iowa, USA
Weather forecast for your location
2. Allow the app to use your location