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
A rise in the average high-temperature is observed during May, moving from a mild 59.9°F (15.5°C) in April to a pleasant 70.2°F (21.2°C). Throughout May nights, Runnells experiences a consistent temperature average of 52.9°F (11.6°C).Humidity
In May, the average relative humidity is 78%.Rainfall
May is the month with the most rainfall. Rain falls for 16.5 days and accumulates 4.45" (113mm) of precipitation.Snowfall
January through May, October through December are months with snowfall. May is the last month it regularly snows in Runnells. During 0.2 snowfall days, in May, Runnells aggregates 0.28" (7mm) of snow. In Runnells, Iowa, during the entire year, snow falls for 35.2 days and aggregates up to 13.31" (338mm) of snow.Daylight
In May, the average length of the day is 14h and 32min.On the first day of the month, sunrise is at 6:09 am and sunset at 8:11 pm. On the last day of May, sunrise is at 5:41 am and sunset at 8:40 pm CDT.
Sunshine
The average sunshine in May is 8.4h.UV index
In Runnells, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In May, the maximum UV index of 5 transforms into these recommendations:
Act with care - The need to guard against sun damage is communicated. The Sun is most powerful around mid-day, so it's a good practice to reduce direct exposure. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be alert! Nearly double the UV rays from the Sun can be reflected by snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What is the average May temperature?
What is the average humidity in May?
What is the wettest month?
How many days does it rain in May?
What is the last month it snows in Runnells?
What is the average length of the day in May?
When is the sunrise / sunset in May?
How many hours of sunshine does Runnells have in May?
How high is the UV index in May?
Average temperature in May
Runnells, IA
- Average high temperature in May: 70.2°F
The warmest month (with the highest average high temperature) is July (83.1°F).
The month with the lowest average high temperature is January (28.4°F).
- Average low temperature in May: 52.9°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
Runnells, 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 (29.89"Hg).
Average wind speed in May
Runnells, IA
- Average wind speed in May: 8.8mph
The windiest months (with the highest average wind speed) are March and April (10.3mph).
The calmest month (with the lowest average wind speed) is August (6.9mph).
Average humidity in May
Runnells, 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
Runnells, IA
- Average rainfall in May: 4.45"
The wettest month (with the highest rainfall) is May (4.45").
The driest month (with the least rainfall) is January (0.91").
Average rainfall days in May
Runnells, IA
- Average rainfall days in May: 16.5 days
The month with the highest number of rainy days is June (16.8 days).
The month with the least rainy days is February (4 days).
Average snowfall in May
Runnells, IA
- Average snowfall in May: 0.28"
The month with the highest snowfall is January (4.37").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Runnells, IA
- Average snowfall days in May: 0.2 days
The month with the highest number of snowfall days is January (10.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Runnells, 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 12min).
- Average sunshine in May: 8h and 2min
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 6min).
Average sunshine days in May
Runnells, IA
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is November (18.7 days).
The month with the least sunshine days is June (11.7 days).
Average UV index in May
Runnells, 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
Runnells, IA
- Average cloud cover in May: 43
The month with the most cloud cover is January (Cloud cover 55).
The months with the least cloud cover are July, August and September (Cloud cover 31).
Average visibility in May
Runnells, 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).
Runnells, Iowa, USA
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