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
May
Weather in May
Temperature
The arrival of May brings a change in Perth's weather, with average high-temperatures moving from April's fresh 10.3°C (50.5°F) to a comfortable 18.2°C (64.8°F). Perth's temperature drops to an average low of 7.8°C (46°F) during the nights of May.Humidity
In Perth, the average relative humidity in May is 79%.Rainfall
In Perth, in May, it is raining for 16.4 days, with typically 67mm (2.64") of accumulated precipitation. In Perth, during the entire year, the rain falls for 141.7 days and collects up to 669mm (26.34") of precipitation.Snowfall
January through May, October through December are months with snowfall in Perth. May is the last month it regularly snows in Perth. During 0.5 snowfall days, in May, Perth aggregates 2mm (0.08") of snow. Throughout the year, there are 56.1 snowfall days, and 622mm (24.49") of snow is accumulated.Daylight
The average length of the day in May in Perth is 14h and 52min.On the first day of the month, sunrise is at 5:53 am and sunset at 8:10 pm. On the last day of May, in Perth, Canada, sunrise is at 5:21 am and sunset at 8:43 pm EDT.
Sunshine
The average sunshine in May is 8.5h.UV index
In May, the average daily maximum UV index is 4. A UV Index estimate of 3 to 5 represents a moderate health risk from exposure to the Sun's UV radiation for average individuals.Note: A maximum daily UV index of 4 during May morphs into the following directions:
Be vigilant - Suggestions to stave off sun damage are provided. The Sun's UV radiation is especially harmful around midday, so reduce exposure and stay safe. Consider a wide-brim hat essential for effective sun defense covering your face, neck, and eyes. Be alert to the fact! The reflection from snow can nearly double the UV radiation of the Sun.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
What are the temperatures in Perth in May?
What is the average humidity in May in Perth?
How many days does it rain in May in Perth?
What is the last month it snows in Perth?
What is the average length of the day in May in Perth?
When are sunrise and sunset in May in Perth?
How many hours of sunshine does Perth have in May?
What is the UV index intensity in May in Perth?
Average temperature in May
Perth, Canada
- Average high temperature in May: 18.2°C
The warmest month (with the highest average high temperature) is July (25.1°C).
The month with the lowest average high temperature is January (-4.4°C).
- Average low temperature in May: 7.8°C
The month with the highest average low temperature is July (15.3°C).
The coldest month (with the lowest average low temperature) is January (-11.8°C).
Average pressure in May
Perth, Canada
- Average pressure in May: 1014.9mbar
The month with the highest atmospheric pressure is November (1018.2mbar).
The month with the lowest atmospheric pressure is June (1012.7mbar).
Average wind speed in May
Perth, Canada
- Average wind speed in May: 12.4km/h
The windiest month (with the highest average wind speed) is February (14.9km/h).
The calmest months (with the lowest average wind speed) are July and August (10.6km/h).
Average humidity in May
Perth, Canada
- Average humidity in May: 79%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (77%).
Average rainfall in May
Perth, Canada
- Average rainfall in May: 67mm
The wettest month (with the highest rainfall) is August (70mm).
The driest months (with the least rainfall) are March and November (43mm).
Average rainfall days in May
Perth, Canada
- Average rainfall days in May: 16.4 days
The month with the highest number of rainy days is July (17.1 days).
The month with the least rainy days is January (5 days).
Average snowfall in May
Perth, Canada
- Average snowfall in May: 2mm
The month with the highest snowfall is February (157mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Perth, Canada
- Average snowfall days in May: 0.5 days
The months with the highest number of snowfall days are January and February (13.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Perth, Canada
- 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: 8h and 3min
The months with the most sunshine are July and August (Average sunshine: 10h and 6min).
The month with the least sunshine is February (Average sunshine: 2h and 42min).
Average sunshine days in May
Perth, Canada
- Average sunshine days in May: 12.8 days
The month with the most sunshine days is November (17.2 days).
The month with the least sunshine days is July (11.1 days).
Average UV index in May
Perth, Canada
- Average UV index in May: 4
The month with the highest UV index is July (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Perth, Canada
- Average cloud cover in May: 45
The month with the most cloud cover is February (Cloud cover 71).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
Perth, Canada
- Average visibility in May: 9km
The months with the highest visibility are April, May, June, July, August, September, October and November (9km).
The months with the lowest visibility are January, February, March and December (8km).
