Ottawa
Canada
Long-term weather forecast
Long-term weather forecast

April weather forecast and climate
Ottawa, Canada

A view of The Parliament Hill from the Ottawa River in Ottawa, Canada
A view of The Parliament Hill from the Ottawa River in Ottawa, Canada
April is a frosty spring month in Ottawa, Canada, with temperature in the range of an average low of 0.4°C (32.7°F) and an average high of 9.1°C (48.4°F).

Temperature

In Ottawa, the average high-temperature significantly increases, from a cold 0.8°C (33.4°F) in March, to a frosty 9.1°C (48.4°F). The average low-temperature, is 0.4°C (32.7°F).

Humidity

In Ottawa, the average relative humidity is 79%.

Rainfall

In April, the rain falls for 14.8 days. Throughout April, 73mm (2.87") of precipitation is accumulated. Throughout the year, in Ottawa, there are 149.6 rainfall days, and 772mm (30.39") of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall. In April, it is snowing for 4.9 days. Throughout April, 53mm (2.09") of snow is accumulated. Throughout the year, there are 83.3 snowfall days, and 1135mm (44.69") of snow is accumulated.

Daylight

The average length of the day in Ottawa is 13.6h.

Sunshine

In Ottawa, the average sunshine is 6.7h.

UV index

In April, the average daily maximum UV index is 3. A UV Index estimate of 3 to 5 represents a moderate health risk from the exposure to the Sun's UV rays for ordinary individuals.
Note: The daily maximum UV index of 3 in April interpret into the following advice:
Take precautions. Light skin individuals may get burned in less than 30 minutes. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. 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. Caution! The reflection of snow can nearly double the intensity of the Sun's UV radiation.

What is the temperature in April in Ottawa?

In Ottawa, in April, the average high-temperature is 9.1°C (48.4°F), and the average low-temperature is 0.4°C (32.7°F).

What is the average humidity in April in Ottawa?

The average relative humidity in April is 79%.

How much does it rain in Ottawa in April?

In Ottawa, in April, it is raining for 14.8 days, with typically 73mm (2.87") of accumulated precipitation.

How much does it snow in Ottawa in April?

In Ottawa, in April, during 4.9 snowfall days, 53mm (2.09") of snow is typically accumulated.

What is the average length of the day in April in Ottawa?

In Ottawa, the average length of the day in April is 13.6h.

How long on average sun shines in April in Ottawa?

The average sunshine in April in Ottawa is 6.7h.

What is the UV index intensity in April in Ottawa?

In April, the average daily maximum UV index in Ottawa is 3. A UV Index estimate of 3 to 5 represents a moderate vulnerability from the exposure to the Sun's UV radiation.
Average temperature in April - Ottawa, Canada
  • Average high temperature in April: 9.1°C

The warmest month (with the highest average high temperature) is July (25.3°C).
The month with the lowest average high temperature is January (-6.3°C).

  • Average low temperature in April: 0.4°C

The month with the highest average low temperature is July (14.5°C).
The coldest month (with the lowest average low temperature) is January (-14.5°C).

Average humidity in April - Ottawa, Canada
  • Average humidity in April: 79%

Months with the highest relative humidity are January and February (91%).
The month with the lowest relative humidity is May (77%).

Average rainfall in April - Ottawa, Canada
  • Average rainfall in April: 73mm

The wettest month (with the highest rainfall) is October (78mm).
The driest month (with the lowest rainfall) is September (54mm).

Average rainfall days in April - Ottawa, Canada
  • Average rainfall days in April: 14.8 days

The month with the highest number of rainy days is July (17.1 days).
The month with the lowest number of rainy days is February (5.9 days).

Average snowfall in April - Ottawa, Canada
  • Average snowfall in April: 53mm

The month with the highest snowfall is January (321mm).
Months with the lowest snowfall are June, July, August and September (0mm).

Average snowfall days in April - Ottawa, Canada
  • Average snowfall days in April: 4.9 days

The month with the highest number of snowfall days is January (19.8 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in April / Average sunshine in April - Ottawa, Canada
  • Average daylight in April: 13.6h

The month with the longest days is June (Average daylight: 15.6h).
The month with shortest days is December (Average daylight: 8.8h).

  • Average sunshine in April: 6.7h

The month with most sunshine is July (Average sunshine: 10.2h).
The month with least sunshine is February (Average sunshine: 2.8h).

Average UV index in April - Ottawa, Canada
  • Average UV index in April: 3

Months with the highest UV index are June, July and August (UV index 5).
Months with the lowest UV index are January, February, November and December (UV index 1).