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
The beginning of May signals a rise in the average high-temperature, moving from a mild 58.5°F (14.7°C) in April to a pleasant 69.1°F (20.6°C). Throughout May, an average nighttime temperature of 52.9°F (11.6°C) is experienced in Ralston, Iowa.Humidity
The average relative humidity in May in Ralston is 73%.Rainfall
May is the month with the most rainfall. Rain falls for 17.3 days and accumulates 4.29" (109mm) of precipitation.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, Ralston aggregates 0.24" (6mm) of snow. Throughout the year, there are 44.8 snowfall days, and 19.8" (503mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 35min.On the first day of the month, sunrise is at 6:13 am and sunset at 8:17 pm. On the last day of May, sunrise is at 5:45 am and sunset at 8:47 pm CDT.
Sunshine
The average sunshine in May is 8.6h.UV index
In May, the average daily maximum UV index in Ralston is 5. A UV Index reading of 3 to 5 represents a medium vulnerability from unsafe exposure to UV radiation for the average person.Note: The maximum UV index, 5 during May, leads to the following recommendations:
Take precautions - Protection against sunburn is recommended. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. Boost your sun resistance with garments that are densely woven yet spacious. Be attentive! The reflective property of snow can nearly double the Sun's UV radiation.
Frequently asked questions
What is the average May temperature in Ralston?
What is the average humidity in May in Ralston?
What is the wettest month in Ralston?
How many days does it rain in May in Ralston?
What is the last month it snows in Ralston?
How many hours of daylight does Ralston have in May?
What time are sunrise and sunset in May in Ralston?
How long on average sun shines in May in Ralston?
How high is the UV index in May in Ralston?
Average temperature in May
Ralston, IA
- Average high temperature in May: 69.1°F
The warmest month (with the highest average high temperature) is July (81.5°F).
The month with the lowest average high temperature is January (26.2°F).
- Average low temperature in May: 52.9°F
The month with the highest average low temperature is July (64.4°F).
The coldest month (with the lowest average low temperature) is January (13.6°F).
Average pressure in May
Ralston, 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
Ralston, IA
- Average wind speed in May: 9.3mph
The windiest month (with the highest average wind speed) is January (11.1mph).
The calmest month (with the lowest average wind speed) is July (7.2mph).
Average humidity in May
Ralston, IA
- Average humidity in May: 73%
The month with the highest relative humidity is January (84%).
The months with the lowest relative humidity are April and October (69%).
Average rainfall in May
Ralston, IA
- Average rainfall in May: 4.29"
The wettest month (with the highest rainfall) is May (4.29").
The driest month (with the least rainfall) is January (0.94").
Average rainfall days in May
Ralston, IA
- Average rainfall days in May: 17.3 days
The month with the highest number of rainy days is June (17.9 days).
The month with the least rainy days is February (4.3 days).
Average snowfall in May
Ralston, IA
- Average snowfall in May: 0.24"
The month with the highest snowfall is February (5.12").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Ralston, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (11.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Ralston, 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: 10h and 24min).
The month with the least sunshine is January (Average sunshine: 4h and 12min).
Average sunshine days in May
Ralston, IA
- Average sunshine days in May: 11.7 days
The month with the most sunshine days is November (18.9 days).
The month with the least sunshine days is June (10 days).
Average UV index in May
Ralston, 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 February (UV index 1).
Average cloud cover in May
Ralston, IA
- Average cloud cover in May: 41
The month with the most cloud cover is January (Cloud cover 55).
The month with the least cloud cover is July (Cloud cover 28).
Average visibility in May
Ralston, IA
- Average visibility in May: 6mi
The months with the highest visibility are February, March, April, May, June, July, September, October, November and December (6mi).
The months with the lowest visibility are January and August (5mi).
Ralston, Iowa, USA
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