May weather forecastRiverton, IA
May
Weather in May
May, the last month of the spring in Riverton, is a pleasant month, with temperature in the range of an average high of 71.8°F (22.1°C) and an average low of 54.5°F (12.5°C).Temperature
The arrival of May brings a change in Riverton's weather, with average high-temperatures moving from April's refreshing 61.7°F (16.5°C) to a pleasant 71.8°F (22.1°C). In the month of May, Riverton's average low-temperature falls to a fresh 54.5°F (12.5°C).Humidity
The average relative humidity in May is 74%.Rainfall
In May, the rain falls for 16.3 days. Throughout May, 4.13" (105mm) of precipitation is accumulated. Throughout the year, in Riverton, there are 125.6 rainfall days, and 26.14" (664mm) of precipitation is accumulated.Snowfall
May through September are months without snowfall.Daylight
In Riverton, the average length of the day in May is 14h and 28min.On the first day of the month, sunrise is at 6:19 am and sunset at 8:18 pm. On the last day of May, in Riverton, sunrise is at 5:53 am and sunset at 8:46 pm CDT.
Sunshine
The average sunshine in May in Riverton is 8.8h.UV index
The average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate threat to health from unsafe exposure to UV radiation for the ordinary person.Note: An average maximum UV index of 5 in May leads to these recommendations:
Prioritize safety - The need to safeguard skin and eyes from harm is emphasized. Avoiding direct sun during mid-day hours can prevent harmful UV radiation exposure. For effective sun eye protection, rely on sunglasses certified for UVA and UVB resistance. Consider this! The reflection from snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Riverton, IA
- Average high temperature in May: 71.8°F
The warmest month (with the highest average high temperature) is July (84°F).
The month with the lowest average high temperature is January (31.3°F).
- Average low temperature in May: 54.5°F
The month with the highest average low temperature is July (66.7°F).
The coldest month (with the lowest average low temperature) is January (18°F).
Average pressure in May
Riverton, IA
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.17"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Riverton, IA
- Average wind speed in May: 8.6mph
The windiest month (with the highest average wind speed) is April (10.3mph).
The calmest month (with the lowest average wind speed) is July (6.7mph).
Average humidity in May
Riverton, IA
- Average humidity in May: 74%
The months with the highest relative humidity are January and July (79%).
The month with the lowest relative humidity is October (67%).
Average rainfall in May
Riverton, IA
- Average rainfall in May: 4.13"
The wettest month (with the highest rainfall) is June (4.29").
The driest month (with the least rainfall) is February (0.71").
Average rainfall days in May
Riverton, IA
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is May (16.3 days).
The month with the least rainy days is February (3.9 days).
Average snowfall in May
Riverton, IA
- Average snowfall in May: 0"
The month with the highest snowfall is January (3.11").
The months with the least snowfall are May, June, July, August and September (0").
Average snowfall days in May
Riverton, IA
- Average snowfall days in May: 0.1 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
Riverton, IA
- Average daylight in May: 14h and 30min
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 48min
The month with the most sunshine is July (Average sunshine: 10h and 30min).
The month with the least sunshine is January (Average sunshine: 4h and 42min).
Average sunshine days in May
Riverton, IA
- Average sunshine days in May: 12.4 days
The month with the most sunshine days is November (20.8 days).
The month with the least sunshine days is June (11.8 days).
Average UV index in May
Riverton, IA
- Average UV index in May: 5
The months with the highest UV index are June, July and August (UV index 6).
The months with the lowest UV index are January, February, November and December (UV index 2).
Average cloud cover in May
Riverton, IA
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 48).
The month with the least cloud cover is July (Cloud cover 26).
Average visibility in May
Riverton, 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).
