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
An increase in the average high-temperature marks May, moving from April's cold 39.9°F (4.4°C) to a cool 51.4°F (10.8°C). Ketchum temperatures generally rest at a low of 32.9°F (0.5°C) during the May nights.Humidity
The average relative humidity in May is 65%.Rainfall
In May, the rain falls for 14.8 days. Throughout May, 1.77" (45mm) of precipitation is accumulated. In Ketchum, during the entire year, the rain falls for 107.7 days and collects up to 15.63" (397mm) of precipitation.Snowfall
Months with snowfall are January through June, September through December. In Ketchum, in May, snow falls for 2.8 days, with typically accumulated 1.46" (37mm) of snow. Throughout the year, there are 88.2 snowfall days, and 69.45" (1764mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 44min.On the first day of the month, sunrise is at 6:28 am and sunset at 8:40 pm. On the last day of May, sunrise is at 5:58 am and sunset at 9:11 pm MDT.
Sunshine
The average sunshine in May is 10.9h.UV index
In Ketchum, the average daily maximum UV index in May is 3. A UV Index estimate of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A daily high UV index of 3 in May leads to these guidelines:
Be mindful. Individuals with a lighter skin tone may suffer burns in less than 30 minutes. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Alert! The snow's reflection can amplify the UV radiation of the Sun 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?
How many days does it snow in May?
How many hours of daylight does Ketchum have in May?
What time are sunrise and sunset in May?
How many hours of sunshine does Ketchum have in May?
What is the UV index reading in May in Ketchum?
Average temperature in May
Ketchum, ID
- Average high temperature in May: 51.4°F
The warmest month (with the highest average high temperature) is July (74.1°F).
The month with the lowest average high temperature is December (25°F).
- Average low temperature in May: 32.9°F
The months with the highest average low temperature are July and August (50.5°F).
The coldest month (with the lowest average low temperature) is January (8.4°F).
Average pressure in May
Ketchum, ID
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.27"Hg).
The month with the lowest atmospheric pressure is June (29.89"Hg).
Average wind speed in May
Ketchum, ID
- Average wind speed in May: 5.8mph
The windiest month (with the highest average wind speed) is July (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.5mph).
Average humidity in May
Ketchum, ID
- Average humidity in May: 65%
The month with the highest relative humidity is February (87%).
The month with the lowest relative humidity is August (37%).
Average rainfall in May
Ketchum, ID
- Average rainfall in May: 1.77"
The wettest month (with the highest rainfall) is March (2.01").
The driest month (with the least rainfall) is July (0.43").
Average rainfall days in May
Ketchum, ID
- Average rainfall days in May: 14.8 days
The month with the highest number of rainy days is May (14.8 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in May
Ketchum, ID
- Average snowfall in May: 1.46"
The month with the highest snowfall is February (15").
The months with the least snowfall are July and August (0").
Average snowfall days in May
Ketchum, ID
- Average snowfall days in May: 2.8 days
The month with the highest number of snowfall days is March (16 days).
The months with the least snowfall days are July and August (0 days).
Average daylight in May /
Average sunshine in May
Ketchum, ID
- Average daylight in May: 14h and 4min
The month with the longest days is June (Average daylight: 15h and 24min).
The month with the shortest days is December (Average daylight: 9h and 0min).
- Average sunshine in May: 10h and 5min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 5h and 42min).
Average sunshine days in May
Ketchum, ID
- Average sunshine days in May: 12.3 days
The month with the most sunshine days is July (20.8 days).
The month with the least sunshine days is April (11.1 days).
Average UV index in May
Ketchum, ID
- Average UV index in May: 3
The months with the highest UV index are June and July (UV index 5).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in May
Ketchum, ID
- Average cloud cover in May: 26
The month with the most cloud cover is February (Cloud cover 44).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in May
Ketchum, ID
- Average visibility in May: 6mi
The months with the highest visibility are April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January, February and December (4mi).
Ketchum, Idaho, USA
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