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
Saint Lucas, Iowa, in May shows a temperature shift, moving from an average high of a fresh 54.5°F (12.5°C) in April to a refreshing 66.6°F (19.2°C). The nighttime temperature in Saint Lucas, during May, averages of 49.8°F (9.9°C).Humidity
In May, the average relative humidity is 80%.Rainfall
In May, the rain falls for 19.8 days. Throughout May, 4.37" (111mm) of precipitation is accumulated. In Saint Lucas, during the entire year, the rain falls for 146.5 days and collects up to 31.3" (795mm) of precipitation.Snowfall
Months with snowfall in Saint Lucas, Iowa, are January through May, October through December. May is the last month it regularly snows. During 0.3 snowfall days, in May, Saint Lucas aggregates 0.2" (5mm) of snow. In Saint Lucas, during the entire year, snow falls for 59.9 days and aggregates up to 24.84" (631mm) of snow.Daylight
In Saint Lucas, the average length of the day in May is 14h and 41min.On the first day of May, sunrise is at 6:00 am and sunset at 8:09 pm. On the last day of the month, sunrise is at 5:31 am and sunset at 8:40 pm CDT.
Sunshine
In May, the average sunshine is 8.1h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index. 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, the maximum UV index of 5 transforms into these recommendations:
Exercise prudence. Persons with fair skin could be burned in under 30 minutes. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Take precaution! The reflection from snow can almost double the UV radiation of the Sun.
Frequently asked questions
What is the usual temperature for Saint Lucas in May?
What is the average humidity in May in Saint Lucas?
How much does it rain in Saint Lucas in May?
What is the last month it snows in Saint Lucas?
How many hours of daylight does Saint Lucas have in May?
What time are sunrise and sunset in May in Saint Lucas?
How many hours of sunshine does Saint Lucas have in May?
What is the month with the highest UV index in Saint Lucas?
How high is the UV index in May in Saint Lucas?
Average temperature in May
Saint Lucas, IA
- Average high temperature in May: 66.6°F
The warmest month (with the highest average high temperature) is July (79°F).
The month with the lowest average high temperature is January (22.8°F).
- Average low temperature in May: 49.8°F
The month with the highest average low temperature is July (62.4°F).
The coldest month (with the lowest average low temperature) is January (10.6°F).
Average pressure in May
Saint Lucas, IA
- Average pressure in May: 29.94"Hg
The month with the highest atmospheric pressure is January (30.14"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Saint Lucas, IA
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Saint Lucas, IA
- Average humidity in May: 80%
The month with the highest relative humidity is January (89%).
The months with the lowest relative humidity are April and October (75%).
Average rainfall in May
Saint Lucas, IA
- Average rainfall in May: 4.37"
The wettest month (with the highest rainfall) is June (5.08").
The driest month (with the least rainfall) is January (1.18").
Average rainfall days in May
Saint Lucas, IA
- Average rainfall days in May: 19.8 days
The months with the highest number of rainy days are May and June (19.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in May
Saint Lucas, IA
- Average snowfall in May: 0.2"
The month with the highest snowfall is February (6.5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Saint Lucas, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (14.5 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Saint Lucas, 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 1min
The month with the most sunshine is August (Average sunshine: 9h and 48min).
The month with the least sunshine is January (Average sunshine: 3h and 30min).
Average sunshine days in May
Saint Lucas, IA
- Average sunshine days in May: 9 days
The month with the most sunshine days is November (16.2 days).
The month with the least sunshine days is June (7.9 days).
Average UV index in May
Saint Lucas, IA
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Saint Lucas, IA
- Average cloud cover in May: 45
The month with the most cloud cover is January (Cloud cover 63).
The month with the least cloud cover is August (Cloud cover 32).
Average visibility in May
Saint Lucas, IA
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, August, September, October, November and December (6mi).
The months with the lowest visibility are January, February and July (5mi).
Saint Lucas, Iowa, USA
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