May weather forecastWalnut, IA
May
Weather in May
The last month of the spring, May, is a pleasant month in Walnut, Iowa, with an average temperature varying between 70.3°F (21.3°C) and 53.4°F (11.9°C).Temperature
The beginning of May signals a rise in the average high-temperature, moving from a moderate 59.9°F (15.5°C) in April to a pleasant 70.3°F (21.3°C). During May, the average low-temperature is recorded at a fresh 53.4°F (11.9°C).Humidity
The average relative humidity in May is 74%.Rainfall
In May, the rain falls for 17.1 days. Throughout May, 4.06" (103mm) of precipitation is accumulated. Throughout the year, there are 127.7 rainfall days, and 26.57" (675mm) 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, Walnut aggregates 0.16" (4mm) of snow. Throughout the year, there are 35.8 snowfall days, and 13.82" (351mm) of snow is accumulated.Daylight
In Walnut, the average length of the day in May is 14h and 32min.On the first day of the month, sunrise is at 6:16 am and sunset at 8:19 pm. On the last day of May, sunrise is at 5:49 am and sunset at 8:47 pm CDT.
Sunshine
In May, the average sunshine is 8.8h.UV index
In May, the average daily maximum UV index is 5. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: In May, the average maximum UV index of 5 translates into the following recommendations:
Act with care - Obligation to protect against skin and eye damage is highlighted. UV radiation is strongest from the Sun during midday; protect yourself by staying in shaded areas. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Remember! The Sun's UV radiation can be magnified almost twofold by the reflection of snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
Walnut, IA
- Average high temperature in May: 70.3°F
The warmest month (with the highest average high temperature) is July (82.9°F).
The month with the lowest average high temperature is January (28.8°F).
- Average low temperature in May: 53.4°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 (15.4°F).
Average pressure in May
Walnut, IA
- Average pressure in May: 29.92"Hg
The month with the highest atmospheric pressure is January (30.16"Hg).
The month with the lowest atmospheric pressure is June (29.87"Hg).
Average wind speed in May
Walnut, IA
- Average wind speed in May: 9.1mph
The windiest month (with the highest average wind speed) is April (10.7mph).
The calmest month (with the lowest average wind speed) is July (7mph).
Average humidity in May
Walnut, IA
- Average humidity in May: 74%
The month with the highest relative humidity is January (82%).
The month with the lowest relative humidity is October (68%).
Average rainfall in May
Walnut, IA
- Average rainfall in May: 4.06"
The wettest month (with the highest rainfall) is June (4.37").
The driest month (with the least rainfall) is January (0.87").
Average rainfall days in May
Walnut, IA
- Average rainfall days in May: 17.1 days
The month with the highest number of rainy days is May (17.1 days).
The month with the least rainy days is February (3.6 days).
Average snowfall in May
Walnut, IA
- Average snowfall in May: 0.16"
The month with the highest snowfall is February (3.7").
The months with the least snowfall are June, July, August and September (0").
Average snowfall days in May
Walnut, IA
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is January (9.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Walnut, IA
- Average daylight in May: 14h and 30min
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 48min
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 36min).
Average sunshine days in May
Walnut, IA
- Average sunshine days in May: 11.7 days
The month with the most sunshine days is November (20.5 days).
The month with the least sunshine days is June (11 days).
Average UV index in May
Walnut, 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, October, November and December (UV index 2).
Average cloud cover in May
Walnut, IA
- Average cloud cover in May: 40
The month with the most cloud cover is January (Cloud cover 51).
The month with the least cloud cover is July (Cloud cover 27).
Average visibility in May
Walnut, 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).
