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
As April transitions into May, a change in temperatures is observed, with average highs moving from a chilly 48.9°F (9.4°C) to a mild 59.7°F (15.4°C). May's nights observe an average temperature of 40.6°F (4.8°C).Humidity
In May, the average relative humidity is 51%.Rainfall
May is the month with the most rainfall. Rain falls for 15 days and accumulates 1.42" (36mm) of precipitation.Snowfall
January through May, September through December are months with snowfall. May is the last month it regularly snows. During 1.3 snowfall days, in May, Mackay aggregates 0.35" (9mm) of snow. Throughout the year, there are 75.2 snowfall days, and 35.28" (896mm) of snow is accumulated.Daylight
In May, the average length of the day is 14h and 46min.On the first day of the month, sunrise is at 6:24 am and sunset at 8:38 pm. On the last day of May, sunrise is at 5:54 am and sunset at 9:09 pm MDT.
Sunshine
In May, the average sunshine is 10.9h.UV index
In Mackay, the average daily maximum UV index in May is 4. A UV Index reading of 3 to 5 represents a medium vulnerability from unprotected exposure to Sun's UV rays for the average person.Note: In May, the maximum UV index of 4 suggests this advice:
Act with care - Obligation to protect against skin and eye damage is highlighted. To guard against the harmful effects of the Sun, minimize exposure during midday. Wearing a wide-brim hat can block approximately 50% of UV radiation, protecting the eyes. Note this! The Sun's UV radiation can nearly be doubled by the reflection off snow.
Published by: Weather U.S. | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are May temperatures in Mackay?
What is the average humidity in May in Mackay?
What is the wettest month?
How much does it rain in May?
What is the last month it snows?
What is the average length of the day in May in Mackay?
When are sunrise and sunset in May?
How many hours of sunshine does Mackay have in May?
How high is the UV index in May?
Average temperature in May
Mackay, ID
- Average high temperature in May: 59.7°F
The warmest month (with the highest average high temperature) is July (81.1°F).
The month with the lowest average high temperature is December (25.3°F).
- Average low temperature in May: 40.6°F
The month with the highest average low temperature is July (56.8°F).
The coldest month (with the lowest average low temperature) is January (10°F).
Average pressure in May
Mackay, ID
- Average pressure in May: 29.91"Hg
The month with the highest atmospheric pressure is January (30.29"Hg).
The month with the lowest atmospheric pressure is June (29.9"Hg).
Average wind speed in May
Mackay, ID
- Average wind speed in May: 7.5mph
The windiest month (with the highest average wind speed) is June (8mph).
The calmest month (with the lowest average wind speed) is January (4.7mph).
Average humidity in May
Mackay, ID
- Average humidity in May: 51%
The month with the highest relative humidity is January (86%).
The months with the lowest relative humidity are July and August (32%).
Average rainfall in May
Mackay, ID
- Average rainfall in May: 1.42"
The wettest month (with the highest rainfall) is May (1.42").
The driest month (with the least rainfall) is July (0.39").
Average rainfall days in May
Mackay, ID
- Average rainfall days in May: 15 days
The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is July (5.9 days).
Average snowfall in May
Mackay, ID
- Average snowfall in May: 0.35"
The month with the highest snowfall is February (7.2").
The months with the least snowfall are June, July and August (0").
Average snowfall days in May
Mackay, ID
- Average snowfall days in May: 1.3 days
The month with the highest number of snowfall days is February (15.1 days).
The months with the least snowfall days are June, July and August (0 days).
Average daylight in May /
Average sunshine in May
Mackay, ID
- Average daylight in May: 14h and 5min
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 30min).
Average sunshine days in May
Mackay, ID
- Average sunshine days in May: 11.3 days
The month with the most sunshine days is July (20.9 days).
The month with the least sunshine days is May (11.3 days).
Average UV index in May
Mackay, ID
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The month with the lowest UV index is February (UV index 1).
Average cloud cover in May
Mackay, ID
- Average cloud cover in May: 25
The month with the most cloud cover is February (Cloud cover 45).
The month with the least cloud cover is July (Cloud cover 10).
Average visibility in May
Mackay, ID
- Average visibility in May: 6mi
The months with the highest visibility are March, April, May, June, July, August, September, October and November (6mi).
The months with the lowest visibility are January and February (4mi).
Mackay, Idaho, USA
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