April weather forecastSaint Catharines, Canada
April
Weather in April
April in Saint Catharines, Canada, is a frosty spring month, with an average temperature fluctuating between 3.6°C (38.5°F) and 9.4°C (48.9°F).Temperature
The arrival of April brings an increase in high-temperatures, moving from an icy 3.8°C (38.8°F) in March to a chilly 9.4°C (48.9°F). Saint Catharines, during the month of April, experiences an average low-temperature of 3.6°C (38.5°F).Humidity
In Saint Catharines, the average relative humidity in April is 76%.Rainfall
In Saint Catharines, Canada, in April, it is raining for 15.9 days, with typically 73mm (2.87") of accumulated precipitation. Throughout the year, there are 177.2 rainfall days, and 786mm (30.94") of precipitation is accumulated.Snowfall
January through May, October through December are months with snowfall. In Saint Catharines, in April, snow falls for 3.3 days, with typically accumulated 28mm (1.1") of snow. Throughout the year, there are 58.5 snowfall days, and 403mm (15.87") of snow is accumulated.Sea temperature
In April, the average sea temperature is 3.6°C (38.5°F).Note: In swimming situations, the extreme cold and danger can lead to fatality. Without the protection of insulated waterproof gear, hypothermia takes effect quickly.
Daylight
In April, the average length of the day is 13h and 26min.On the first day of the month, sunrise is at 6:57 am and sunset at 7:43 pm. On the last day of April, in Saint Catharines, sunrise is at 6:10 am and sunset at 8:17 pm EDT.
Sunshine
In April, the average sunshine is 7.6h.UV index
In Saint Catharines, the average daily maximum UV index in April is 3. A UV Index value of 3 to 5 symbolizes a medium health hazard from unprotected exposure to Sun's UV rays for the average person.Note: A maximum high UV index of 3 in April translates into the following recommendations:
Ensure safety - Imperative it is to shield skin and eyes from damage. Being exposed to the midday Sun can have harmful effects due to strong UV radiation; always take precautions. Sun-protective clothing, a long-sleeved shirt and pants, a wide-brimmed hat, and UVA and UVB-blocking sunglasses are particularly helpful in blocking UV radiation's harmful effects. Consider this! The reflection from 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 April
Saint Catharines, Canada
- Average high temperature in April: 9.4°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 April: 3.6°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 April
Saint Catharines, Canada
- Average pressure in April: 1014.8mbar
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 April
Saint Catharines, Canada
- Average wind speed in April: 17.3km/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 April
Saint Catharines, Canada
- Average humidity in April: 76%
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 April
Saint Catharines, Canada
- Average rainfall in April: 73mm
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 April
Saint Catharines, Canada
- Average rainfall days in April: 15.9 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 April
Saint Catharines, Canada
- Average snowfall in April: 28mm
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 April
Saint Catharines, Canada
- Average snowfall days in April: 3.3 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 April
Saint Catharines, Canada
- Average sea temperature in April: 3.6°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 April /
Average sunshine in April
Saint Catharines, Canada
- Average daylight in April: 13h and 24min
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 April: 7h and 36min
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 April
Saint Catharines, Canada
- Average sunshine days in April: 10.4 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 April
Saint Catharines, Canada
- Average UV index in April: 3
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 April
Saint Catharines, Canada
- Average cloud cover in April: 49
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 April
Saint Catharines, Canada
- Average visibility in April: 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).
