May weather forecastLondon, Canada
May
Weather in May
May is when London, Canada, truly enters its stride into warm weather, shedding the last vestiges of winter. The city heats up to an average maximum of 18.7°C (65.7°F), a veritable jump from April's temperatures. The landscape, blooming in technicolor, is inviting, drawing people outdoors, making cities come alive with radiant energy. May's weather heralds the arrival of summer with longer daylight hours. The refreshing spring breeze that ruffles through the trees whispers of warmer days to come.Temperature
May's onset witnesses a marked shift in the average high-temperature, moving from a fresh 10.7°C (51.3°F) in April to an enjoyable 18.7°C (65.7°F). London experiences a steady low-temperature of 8.8°C (47.8°F) throughout May.Humidity
April and May, with an average relative humidity of 75%, are the least humid months in London, Canada.Rainfall
In London, during May, the rain falls for 14.1 days and regularly aggregates up to 34mm (1.34") of precipitation. Throughout the year, in London, Canada, there are 128.1 rainfall days, and 346mm (13.62") of precipitation is accumulated.Snowfall
Months with snowfall in London are January through May, October through December. May is the last month it regularly snows in London. During 0.4 snowfall days, in May, London aggregates 3mm (0.12") of snow. Throughout the year, there are 68.4 snowfall days, and 277mm (10.91") of snow is accumulated.Daylight
In May, the average length of the day in London is 14h and 40min.On the first day of May in London, sunrise is at 6:17 am and sunset at 8:26 pm. On the last day of the month, sunrise is at 5:48 am and sunset at 8:56 pm EDT.
Sunshine
In May, the average sunshine in London is 8.7h.UV index
May through August, with an average maximum UV index of 5, are months with the highest UV index in London. A UV Index of 3 to 5 symbolizes a moderate health risk from exposure to the Sun's UV rays for ordinary individuals.Note: The maximum daily UV index of 5 in May interprets into the following recommendations:
Put precautions into practice - Guidance to elude sunburn is provided. Limiting exposure to the direct Sun during midday hours can help prevent harmful UV radiation effects. Shield yourself from the harmful effects of UV radiation with sun-protective attire, a hat, and quality sunglasses. Consider carefully! The reflective quality of snow can almost double the intensity of the Sun's UV radiation.
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate
Frequently asked questions
Average temperature in May
London, Canada
- Average high temperature in May: 18.7°C
The warmest month (with the highest average high temperature) is July (25.5°C).
The month with the lowest average high temperature is January (-2.8°C).
- Average low temperature in May: 8.8°C
The month with the highest average low temperature is July (15.4°C).
The coldest months (with the lowest average low temperature) are January and February (-8.2°C).
Average pressure in May
London, Canada
- Average pressure in May: 1015.4mbar
The month with the highest atmospheric pressure is March (1018.7mbar).
The month with the lowest atmospheric pressure is June (1013.4mbar).
Average wind speed in May
London, Canada
- Average wind speed in May: 13.3km/h
The windiest month (with the highest average wind speed) is January (17.9km/h).
The calmest month (with the lowest average wind speed) is July (10.4km/h).
Average humidity in May
London, Canada
- Average humidity in May: 75%
The months with the highest relative humidity are January and February (88%).
The months with the lowest relative humidity are April and May (75%).
Average rainfall in May
London, Canada
- Average rainfall in May: 34mm
The wettest month (with the highest rainfall) is July (45mm).
The driest month (with the least rainfall) is March (20mm).
Average rainfall days in May
London, Canada
- Average rainfall days in May: 14.1 days
The month with the highest number of rainy days is May (14.1 days).
The months with the least rainy days are January and February (5.7 days).
Average snowfall in May
London, Canada
- Average snowfall in May: 3mm
The month with the highest snowfall is January (71mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
London, Canada
- Average snowfall days in May: 0.4 days
The month with the highest number of snowfall days is January (17.8 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
London, Canada
- Average daylight in May: 14h and 42min
The month with the longest days is June (Average daylight: 15h and 18min).
The month with the shortest days is December (Average daylight: 9h and 6min).
- Average sunshine in May: 8h and 42min
The month with the most sunshine is July (Average sunshine: 10h and 6min).
The month with the least sunshine is January (Average sunshine: 2h and 18min).
Average sunshine days in May
London, Canada
- Average sunshine days in May: 14.2 days
The month with the most sunshine days is September (16.1 days).
The month with the least sunshine days is January (9.3 days).
Average UV index in May
London, Canada
- Average UV index in May: 5
The months with the highest UV index are May, June, July and August (UV index 5).
The months with the lowest UV index are January, February and December (UV index 1).
Average cloud cover in May
London, Canada
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 76).
The month with the least cloud cover is July (Cloud cover 33).
Average visibility in May
London, Canada
- Average visibility in May: 9km
The months with the highest visibility are March, April, May, June, July, August, September, October, November and December (9km).
The months with the lowest visibility are January and February (8km).
