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
In Marengo, the onset of May comes with an increased average high-temperature, moving from April's mild 58.1°F (14.5°C) to an agreeable 69.1°F (20.6°C). May is noted for a mean low-temperature of 52.3°F (11.3°C).Humidity
In Marengo, the average relative humidity in May is 79%.Rainfall
The month with the most rainfall is May, when the rain falls for 18.6 days and typically aggregates up to 4.33" (110mm) of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows in Marengo, Iowa. During 0.1 snowfall days, in May, Marengo aggregates 0.04" (1mm) of snow. In Marengo, during the entire year, snow falls for 36.9 days and aggregates up to 15.91" (404mm) of snow.Daylight
The average length of the day in May in Marengo is 14h and 34min.On the first day of the month, sunrise is at 6:03 am and sunset at 8:07 pm. On the last day of May, in Marengo, Iowa, sunrise is at 5:35 am and sunset at 8:36 pm CDT.
Sunshine
In Marengo, the average sunshine in May is 8.6h.UV index
In May, the average daily maximum UV index in Marengo is 5. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: The UV index of 5 during May leads to these advisories:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. Sunglasses that ward off UVA and UVB rays play a pivotal role in reducing solar eye damage. Be prepared! The intensity of the Sun's UV radiation can be amplified nearly double due to snow reflection.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Marengo?
What is the average humidity in May in Marengo?
What is the wettest month in Marengo?
How many days does it rain in May in Marengo?
What is the last month it snows in Marengo?
How many hours of daylight does Marengo have in May?
When is the sunrise / sunset in May in Marengo?
How many hours of sunshine does Marengo have in May?
What is the UV index reading in May in Marengo?
Average temperature in May
Marengo, IA
- Average high temperature in May: 69.1°F
The warmest month (with the highest average high temperature) is July (81°F).
The month with the lowest average high temperature is January (27°F).
- Average low temperature in May: 52.3°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 (14.4°F).
Average pressure in May
Marengo, 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
Marengo, IA
- Average wind speed in May: 9.1mph
The windiest months (with the highest average wind speed) are January and April (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7mph).
Average humidity in May
Marengo, IA
- Average humidity in May: 79%
The months with the highest relative humidity are January, February and July (84%).
The month with the lowest relative humidity is October (72%).
Average rainfall in May
Marengo, IA
- Average rainfall in May: 4.33"
The wettest month (with the highest rainfall) is May (4.33").
The driest month (with the least rainfall) is January (1.14").
Average rainfall days in May
Marengo, IA
- Average rainfall days in May: 18.6 days
The month with the highest number of rainy days is June (18.8 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in May
Marengo, IA
- Average snowfall in May: 0.04"
The month with the highest snowfall is January (5").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Marengo, IA
- Average snowfall days in May: 0.1 days
The month with the highest number of snowfall days is February (9.7 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Marengo, 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: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 4h and 6min).
Average sunshine days in May
Marengo, IA
- Average sunshine days in May: 9.9 days
The month with the most sunshine days is January (18.3 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in May
Marengo, 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 January (UV index 1).
Average cloud cover in May
Marengo, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 56).
The months with the least cloud cover are August and September (Cloud cover 30).
Average visibility in May
Marengo, IA
- Average visibility in May: 6mi
The months with the highest visibility are January, February, March, April, May, June, August, September, October, November and December (6mi).
The month with the lowest visibility is July (5mi).
Marengo, Iowa, USA
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