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 arrival of May signals an increase in the average high-temperature, moving from a wintry 42.4°F (5.8°C) in April to a moderate 55.9°F (13.3°C). Nightfall in May introduces a considerable dip in temperature, settling at an average of 33.3°F (0.7°C).Humidity
In Eighteenmile, the average relative humidity in May is 67%.Rainfall
In May, the rain falls for 17 days. Throughout May, 2.2" (56mm) of precipitation is accumulated. In Eighteenmile, during the entire year, the rain falls for 106.1 days and collects up to 20.83" (529mm) of precipitation.Snowfall
January through July, September through December are months with snowfall. In Eighteenmile, in May, snow falls for 5.7 days, with typically accumulated 4.8" (122mm) of snow. In Eighteenmile, during the entire year, snow falls for 138.1 days and aggregates up to 107.64" (2734mm) of snow.Daylight
The average length of the day in May is 14h and 49min.On the first day of May, sunrise is at 6:17 am and sunset at 8:32 pm. On the last day of the month, sunrise is at 5:46 am and sunset at 9:04 pm MDT.
Sunshine
The average sunshine in May is 10.3h.UV index
The average daily maximum UV index in May is 4. A UV Index value of 3 to 5 symbolizes a medium vulnerability from unprotected exposure to Sun's UV rays for the ordinary person.Note: A maximum high UV index of 4 in May translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. The intensity of the Sun's UV radiation during midday suggests reducing time spent outdoors. On sunny days, it's ideal to wear sunglasses that filter out UVA and UVB rays. Watch out! The Sun's UV radiation can be nearly magnified twofold due to snow reflection.
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?
How much does it rain in May?
How much does it snow in May?
How many hours of daylight does Eighteenmile have in May?
When are sunrise and sunset in May?
How long on average sun shines in May?
What is the UV index intensity in May?
Average temperature in May
Eighteenmile, ID
- Average high temperature in May: 55.9°F
The warmest month (with the highest average high temperature) is July (77.4°F).
The month with the lowest average high temperature is December (22.3°F).
- Average low temperature in May: 33.3°F
The month with the highest average low temperature is August (46.6°F).
The coldest months (with the lowest average low temperature) are January and December (6.8°F).
Average pressure in May
Eighteenmile, ID
- Average pressure in May: 29.93"Hg
The month with the highest atmospheric pressure is January (30.26"Hg).
The month with the lowest atmospheric pressure is June (29.92"Hg).
Average wind speed in May
Eighteenmile, ID
- Average wind speed in May: 6mph
The windiest month (with the highest average wind speed) is June (6.3mph).
The calmest month (with the lowest average wind speed) is January (4.4mph).
Average humidity in May
Eighteenmile, ID
- Average humidity in May: 67%
The months with the highest relative humidity are January and February (94%).
The month with the lowest relative humidity is August (47%).
Average rainfall in May
Eighteenmile, ID
- Average rainfall in May: 2.2"
The wettest month (with the highest rainfall) is February (2.64").
The driest month (with the least rainfall) is July (0.47").
Average rainfall days in May
Eighteenmile, ID
- Average rainfall days in May: 17 days
The month with the highest number of rainy days is May (17 days).
The month with the least rainy days is January (3.8 days).
Average snowfall in May
Eighteenmile, ID
- Average snowfall in May: 4.8"
The month with the highest snowfall is January (19.84").
The month with the least snowfall is August (0").
Average snowfall days in May
Eighteenmile, ID
- Average snowfall days in May: 5.7 days
The month with the highest number of snowfall days is December (23 days).
The month with the least snowfall days is August (0 days).
Average daylight in May /
Average sunshine in May
Eighteenmile, ID
- Average daylight in May: 14h and 5min
The month with the longest days is June (Average daylight: 15h and 30min).
The month with the shortest days is December (Average daylight: 8h and 54min).
- Average sunshine in May: 10h and 2min
The month with the most sunshine is July (Average sunshine: 12h and 0min).
The month with the least sunshine is January (Average sunshine: 3h and 48min).
Average sunshine days in May
Eighteenmile, ID
- Average sunshine days in May: 9.3 days
The month with the most sunshine days is July (21.2 days).
The month with the least sunshine days is February (5.9 days).
Average UV index in May
Eighteenmile, ID
- Average UV index in May: 4
The months with the highest UV index are June and July (UV index 5).
The months with the lowest UV index are January, February, November and December (UV index 1).
Average cloud cover in May
Eighteenmile, ID
- Average cloud cover in May: 32
The month with the most cloud cover is February (Cloud cover 67).
The month with the least cloud cover is July (Cloud cover 13).
Average visibility in May
Eighteenmile, ID
- Average visibility in May: 6mi
The months with the highest visibility are May, June, July, August, September and October (6mi).
The months with the lowest visibility are January, February and December (3mi).
Eighteenmile, Idaho, USA
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