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 signals a temperature shift, moving from a moderate 59.4°F (15.2°C) in April to a pleasant 69.1°F (20.6°C). Massena's temperature lowers to a mean of 52.5°F (11.4°C) during the nights in May.Humidity
In May, the average relative humidity is 78%.Rainfall
In Massena, in May, it is raining for 18 days, with typically 4.21" (107mm) of accumulated precipitation. Throughout the year, there are 138.2 rainfall days, and 28.23" (717mm) of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows. During 0.3 snowfall days, in May, Massena aggregates 0.63" (16mm) of snow. Throughout the year, there are 35.5 snowfall days, and 15.71" (399mm) of snow is accumulated.Daylight
In Massena, Iowa, the average length of the day in May is 14h and 31min.On the first day of May, sunrise is at 6:15 am and sunset at 8:16 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:45 pm CDT.
Sunshine
In Massena, the average sunshine in May is 8.5h.UV index
The average daily maximum UV index in May is 5. A UV Index value of 3 to 5 symbolizes a medium health hazard from exposure to the Sun's UV rays for the ordinary person.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Adopt protective measures - It is advised to guard against sun damage. To prevent harmful UV exposure, minimize direct contact with the Sun around midday. Loose clothes with a tight weave are optimal for safeguarding yourself against the Sun's rays. Be mindful! The reflection from snow can increase the Sun's UV radiation nearly twice.
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?
How much does it rain in May?
What is the last month it snows?
How many hours of daylight does Massena have in May?
When are sunrise and sunset in May?
How many hours of sunshine does Massena have in May?
What is the UV index reading in May?
Average temperature in May
Massena, IA
- Average high temperature in May: 69.1°F
The warmest month (with the highest average high temperature) is July (82.4°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in May: 52.5°F
The month with the highest average low temperature is July (65.1°F).
The coldest month (with the lowest average low temperature) is January (14.9°F).
Average pressure in May
Massena, 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 (29.88"Hg).
Average wind speed in May
Massena, IA
- Average wind speed in May: 8.9mph
The windiest month (with the highest average wind speed) is January (10.7mph).
The calmest months (with the lowest average wind speed) are July and August (7.1mph).
Average humidity in May
Massena, IA
- Average humidity in May: 78%
The months with the highest relative humidity are January, February and June (82%).
The month with the lowest relative humidity is October (70%).
Average rainfall in May
Massena, IA
- Average rainfall in May: 4.21"
The wettest month (with the highest rainfall) is June (4.49").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in May
Massena, IA
- Average rainfall days in May: 18 days
The month with the highest number of rainy days is June (18.5 days).
The month with the least rainy days is January (4 days).
Average snowfall in May
Massena, IA
- Average snowfall in May: 0.63"
The month with the highest snowfall is February (4.41").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Massena, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (9.6 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Massena, IA
- Average daylight in May: 14h and 3min
The month with the longest days is June (Average daylight: 15h and 6min).
The month with the shortest days is December (Average daylight: 9h and 18min).
- Average sunshine in May: 8h and 3min
The month with the most sunshine is July (Average sunshine: 10h and 12min).
The month with the least sunshine is January (Average sunshine: 4h and 24min).
Average sunshine days in May
Massena, IA
- Average sunshine days in May: 11.2 days
The month with the most sunshine days is November (19.5 days).
The month with the least sunshine days is June (9.6 days).
Average UV index in May
Massena, 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
Massena, IA
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 53).
The month with the least cloud cover is September (Cloud cover 29).
Average visibility in May
Massena, 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).
Massena, Iowa, USA
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