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
Waterloo's weather in May presents a rise in the average high-temperature, moving from a fresh 10.1°C (50.2°F) in April to an enjoyable 18°C (64.4°F). An average low-temperature of 7.8°C (46°F) is recorded during the nights in May in Waterloo.Humidity
In May, the average relative humidity is 76%.Rainfall
In Waterloo, in May, it is raining for 16.3 days, with typically 67mm (2.64") of accumulated precipitation. In Waterloo, during the entire year, the rain falls for 157.6 days and collects up to 681mm (26.81") of precipitation.Snowfall
Months with snowfall are January through May, October through December. May is the last month it regularly snows. During 0.6 snowfall days, in May, Waterloo aggregates 3mm (0.12") of snow. In Waterloo, Canada, during the entire year, snow falls for 80.1 days and aggregates up to 666mm (26.22") of snow.Daylight
In May, the average length of the day is 14h and 43min.On the first day of May, sunrise is at 6:13 am and sunset at 8:24 pm. On the last day of the month, sunrise is at 5:44 am and sunset at 8:55 pm EDT.
Sunshine
In Waterloo, the average sunshine in May is 8.7h.UV index
The months with the highest UV index in Waterloo, Canada, are May through August, with an average maximum UV index of 5. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for average individuals.Note: In May, a daily UV index of 5 turns into the following recommendations:
Undertake precautions - Guarding against sun damage is counselled. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. For a sun-safe wardrobe, go for clothes that are tightly woven and generously sized. Be careful! The Sun's UV radiation can nearly be doubled by the reflective quality of snow.
Frequently asked questions
What are the temperatures in Waterloo in May?
What is the average humidity in May in Waterloo?
How much does it rain in Waterloo in May?
What is the last month it snows in Waterloo?
What is the average length of the day in May in Waterloo?
When is the sunrise / sunset in May in Waterloo?
How long on average sun shines in May in Waterloo?
What is the month with the highest UV index in Waterloo?
What is the UV index reading in May in Waterloo?
Average temperature in May
Waterloo, Canada
- Average high temperature in May: 18°C
The warmest month (with the highest average high temperature) is July (24.8°C).
The month with the lowest average high temperature is January (-3.7°C).
- Average low temperature in May: 7.8°C
The month with the highest average low temperature is July (15°C).
The coldest month (with the lowest average low temperature) is January (-9.3°C).
Average pressure in May
Waterloo, Canada
- Average pressure in May: 1015.4mbar
The month with the highest atmospheric pressure is March (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).
Average wind speed in May
Waterloo, Canada
- Average wind speed in May: 13.9km/h
The windiest month (with the highest average wind speed) is January (18.1km/h).
The calmest month (with the lowest average wind speed) is July (11km/h).
Average humidity in May
Waterloo, Canada
- Average humidity in May: 76%
The months with the highest relative humidity are January and February (89%).
The month with the lowest relative humidity is April (75%).
Average rainfall in May
Waterloo, Canada
- Average rainfall in May: 67mm
The wettest month (with the highest rainfall) is October (71mm).
The driest month (with the least rainfall) is September (37mm).
Average rainfall days in May
Waterloo, Canada
- Average rainfall days in May: 16.3 days
The month with the highest number of rainy days is July (19 days).
The month with the least rainy days is February (6.4 days).
Average snowfall in May
Waterloo, Canada
- Average snowfall in May: 3mm
The month with the highest snowfall is February (164mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Waterloo, Canada
- Average snowfall days in May: 0.6 days
The month with the highest number of snowfall days is January (18.3 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average daylight in May /
Average sunshine in May
Waterloo, Canada
- 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: 8h and 4min
The month with the most sunshine is July (Average sunshine: 9h and 54min).
The month with the least sunshine is January (Average sunshine: 2h and 30min).
Average sunshine days in May
Waterloo, Canada
- Average sunshine days in May: 12.1 days
The month with the most sunshine days is September (13.9 days).
The month with the least sunshine days is February (6.7 days).
Average UV index in May
Waterloo, 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
Waterloo, Canada
- Average cloud cover in May: 42
The month with the most cloud cover is January (Cloud cover 75).
The months with the least cloud cover are July and August (Cloud cover 34).
Average visibility in May
Waterloo, Canada
- Average visibility in May: 9km
The months with the highest visibility are April, May, June, July and October (9km).
The month with the lowest visibility is January (7km).
Waterloo, Canada
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