May weather forecastWaterdown, Canada

May

Weather in May

The last month of the spring, May, is a refreshing month in Waterdown, Canada, with an average temperature fluctuating between 8.8°C (47.8°F) and 17.2°C (63°F).

Temperature

A shift in the average high-temperature is noticeable in May, changing from a cool 10°C (50°F) in April to an enjoyable 17.2°C (63°F). During May, Waterdown experiences an average low-temperature of 8.8°C (47.8°F) at night.

Humidity

In May, the average relative humidity in Waterdown is 76%.

Rainfall

In May, the rain falls for 18.3 days. Throughout May, 69mm (2.72") of precipitation is accumulated. Throughout the year, there are 175.2 rainfall days, and 711mm (27.99") of precipitation is accumulated.

Snowfall

Months with snowfall are January through May, November and December. May is the last month it regularly snows in Waterdown, Canada. During 0.3 snowfall days, in May, Waterdown aggregates 2mm (0.08") of snow. Throughout the year, in Waterdown, there are 58.6 snowfall days, and 463mm (18.23") of snow is accumulated.

Daylight

The average length of the day in May in Waterdown is 14h and 43min.
On the first day of May, sunrise is at 6:11 am and sunset at 8:21 pm. On the last day of the month, sunrise is at 5:42 am and sunset at 8:52 pm EDT.

Sunshine

In May, the average sunshine in Waterdown is 9.1h.

UV index

The average daily maximum UV index in May in Waterdown is 5. A UV Index value of 3 to 5 symbolizes a medium vulnerability from exposure to the Sun's UV rays for the average person.
Note: A maximum daily UV index of 5 during May morphs into the following directions:
Be cautious. Those with fair skin can be subjected to burns in fewer than 30 minutes. Considering the harmful UV rays from the Sun during midday, it's essential to reduce exposure. Using UVA and UVB-protective sunglasses and sun-protective clothing is effective against UV radiation. Be cautious! The UV radiation from the Sun can be magnified almost twofold by snow reflection.

Updated: Feb 5, 2024
Published by: Weather Atlas | About Us
Data Sources | Weather Forecasting & Climate

Frequently asked questions

The high-temperature, in May, in Waterdown, records 17.2°C (63°F), while the low-temperature is 8.8°C (47.8°F).

In Waterdown, the average relative humidity in May is 76%.

In Waterdown, in May, during 18.3 rainfall days, 69mm (2.72") of precipitation is typically accumulated.

May is the last month it regularly snows in Waterdown. During 0.3 snowfall days, in May, Waterdown aggregates 2mm (0.08") of snow.

In Waterdown, the average day length in May is 14h and 43min.

In May, on the first day of the month, sunrise is at 6:11 am and sunset at 8:21 pm. On the last day of the month, in Waterdown, Canada, sunrise is at 5:42 am and sunset at 8:52 pm EDT.

In May, the average sunshine duration in Waterdown, Canada, is 9.1h.

In Waterdown, Canada, the average daily maximum UV index in May is 5. A UV Index estimate of 3 to 5 represents a moderate vulnerability from unsafe exposure to Sun's UV rays.

Today

Tomorrow

Long-term

Year J F M A May J J A S O N D

Apr

May

Jun

Average high temperature

10°C

17.2°C

21.8°C

Average low temperature

Average pressure

Average wind speed

Average max. wind speed

17.9km/h

14.2km/h

13km/h

Average wind speed gusts

Average humidity

Average rainfall

Average rainfall days

Average snowfall

Average snowfall days

Average daylight

Average sunshine

Average sunshine days

10.2

11.2

12.1

Average UV index

Average cloud cover

Average visibility

Average temperature in May
Waterdown, Canada

Average high temperature in May: 17.2°C

The warmest month (with the highest average high temperature) is July (25.4°C).
The month with the lowest average high temperature is January (-2.3°C).

Average low temperature in May: 8.8°C

The month with the highest average low temperature is July (17.3°C).
The coldest month (with the lowest average low temperature) is January (-7.3°C).

Average pressure in May
Waterdown, Canada

Average pressure in May: 1015.4mbar

The months with the highest atmospheric pressure are March and November (1018.5mbar).
The month with the lowest atmospheric pressure is June (1013.3mbar).

Average wind speed in May
Waterdown, Canada

Average wind speed in May: 13.2km/h

The windiest month (with the highest average wind speed) is January (19km/h).
The calmest month (with the lowest average wind speed) is July (11.3km/h).

Average humidity in May
Waterdown, Canada

Average humidity in May: 76%

The month with the highest relative humidity is February (85%).
The month with the lowest relative humidity is April (75%).

Average rainfall in May
Waterdown, Canada

Average rainfall in May: 69mm

The wettest month (with the highest rainfall) is July (74mm).
The driest month (with the least rainfall) is September (44mm).

Average rainfall days in May
Waterdown, Canada

Average rainfall days in May: 18.3 days

The month with the highest number of rainy days is July (19.2 days).
The month with the least rainy days is February (9.3 days).

Average snowfall in May
Waterdown, Canada

Average snowfall in May: 2mm

The month with the highest snowfall is February (137mm).
The months with the least snowfall are June, July, August, September and October (0mm).

Average snowfall days in May
Waterdown, Canada

Average snowfall days in May: 0.3 days

The month with the highest number of snowfall days is January (14.8 days).
The months with the least snowfall days are June, July, August and September (0 days).

Average daylight in May /
Average sunshine in May
Waterdown, 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 0min).

Average sunshine in May: 9h and 6min

The month with the most sunshine is July (Average sunshine: 10h and 36min).
The month with the least sunshine is January (Average sunshine: 3h and 12min).