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 sea temperature 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
May brings a temperature increase, with average high-temperatures moving from April's chilly 9.4°C (48.9°F) to an enjoyable 16.2°C (61.2°F). Saint Catharines, in May, observes a steady average low-temperature of 9.3°C (48.7°F).Humidity
In Saint Catharines, the average relative humidity in May is 78%.Rainfall
In May, the rain falls for 17.6 days. Throughout May, 79mm (3.11") of precipitation is accumulated. In Saint Catharines, during the entire year, the rain falls for 177.2 days and collects up to 786mm (30.94") of precipitation.Snowfall
Months with snowfall in Saint Catharines are January through May, October through December. May is the last month it regularly snows in Saint Catharines. During 0.3 snowfall days, in May, Saint Catharines aggregates 5mm (0.2") of snow. Throughout the year, in Saint Catharines, there are 58.5 snowfall days, and 403mm (15.87") of snow is accumulated.Sea temperature
In Saint Catharines, Canada, in May, the average water temperature is 6.9°C (44.4°F).Note: It is advised against swimming in 6.9°C (44.4°F) when it drops below 10°C (50°F). Such temperatures can cause extreme cold shock, leading to hyperventilation.
Daylight
The average length of the day in May is 14h and 41min.On the first day of May in Saint Catharines, sunrise is at 6:09 am and sunset at 8:18 pm. On the last day of the month, sunrise is at 5:40 am and sunset at 8:49 pm EDT.
Sunshine
The average sunshine in May in Saint Catharines is 9.2h.UV index
In Saint Catharines, the average daily maximum UV index in May is 4. A UV Index of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV radiation for the average person.Note: In May, the maximum UV index of 4 translates into these guidelines:
Heed the precautions - It is counselled to guard against solar damage. Sun's radiation is most powerful around mid-day, so it's best to limit outdoor activities during this time. Your best bet for sun defense on the face, eyes, and neck is a hat with a wide brim. Remember to consider! The UV radiation from the Sun can be intensified nearly twice by the reflection of snow.
Frequently asked questions
What is the average May temperature in Saint Catharines?
What is the average humidity in May in Saint Catharines?
How much does it rain in Saint Catharines in May?
What is the last month it snows in Saint Catharines?
What is the sea water temperature in May in Saint Catharines?
How many hours of daylight does Saint Catharines have in May?
When is the sunrise / sunset in May in Saint Catharines?
How many hours of sunshine does Saint Catharines have in May?
What is the UV index reading in May in Saint Catharines?
Average temperature in May
Saint Catharines, Canada
- Average high temperature in May: 16.2°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 (-1.4°C).
- Average low temperature in May: 9.3°C
The month with the highest average low temperature is July (18.6°C).
The coldest month (with the lowest average low temperature) is January (-6.1°C).
Average pressure in May
Saint Catharines, Canada
- Average pressure in May: 1015.4mbar
The month with the highest atmospheric pressure is November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).
Average wind speed in May
Saint Catharines, Canada
- Average wind speed in May: 13.6km/h
The windiest month (with the highest average wind speed) is January (21km/h).
The calmest month (with the lowest average wind speed) is July (12.1km/h).
Average humidity in May
Saint Catharines, Canada
- Average humidity in May: 78%
The months with the highest relative humidity are January and February (83%).
The month with the lowest relative humidity is September (74%).
Average rainfall in May
Saint Catharines, Canada
- Average rainfall in May: 79mm
The wettest month (with the highest rainfall) is July (80mm).
The driest months (with the least rainfall) are September and November (55mm).
Average rainfall days in May
Saint Catharines, Canada
- Average rainfall days in May: 17.6 days
The month with the highest number of rainy days is October (18.9 days).
The month with the least rainy days is February (8.8 days).
Average snowfall in May
Saint Catharines, Canada
- Average snowfall in May: 5mm
The month with the highest snowfall is February (127mm).
The months with the least snowfall are June, July, August and September (0mm).
Average snowfall days in May
Saint Catharines, Canada
- Average snowfall days in May: 0.3 days
The month with the highest number of snowfall days is February (14.1 days).
The months with the least snowfall days are June, July, August and September (0 days).
Average sea temperature in May
Saint Catharines, Canada
- Average sea temperature in May: 6.9°C
The best month for swimming (with the highest average sea temperature) is August (23.2°C).
The coldest month (with the lowest average sea temperature) is February (1.7°C).
Average daylight in May /
Average sunshine in May
Saint Catharines, Canada
- Average daylight in May: 14h and 4min
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: 9h and 1min
The month with the most sunshine is July (Average sunshine: 10h and 42min).
The month with the least sunshine is January (Average sunshine: 2h and 48min).
Average sunshine days in May
Saint Catharines, Canada
- Average sunshine days in May: 11.5 days
The month with the most sunshine days is September (13 days).
The month with the least sunshine days is January (7.5 days).
Average UV index in May
Saint Catharines, Canada
- Average UV index in May: 4
The months with the highest UV index are July and August (UV index 6).
The months with the lowest UV index are January and December (UV index 1).
Average cloud cover in May
Saint Catharines, Canada
- Average cloud cover in May: 39
The month with the most cloud cover is January (Cloud cover 71).
The month with the least cloud cover is August (Cloud cover 27).
Average visibility in May
Saint Catharines, Canada
- Average visibility in May: 9km
The months with the highest visibility are June, July, August and September (10km).
The months with the lowest visibility are January and February (8km).
Saint Catharines, Canada
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