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

October 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
October, the same as September, is another fresh autumn month in Ottawa, Canada, with average temperature fluctuating between 3.3°C (37.9°F) and 12.7°C (54.9°F).

Temperature

In Ottawa, the average high-temperature in October decreases, from a pleasant 20.4°C (68.7°F) in September, to a fresh 12.7°C (54.9°F). The average low-temperature, in Ottawa, is 3.3°C (37.9°F).

Humidity

The average relative humidity in October is 61.6%.

Rainfall

In Ottawa, during 13.7 rainfall days, 82.2mm (3.2") of precipitation is typically accumulated. Throughout the year, there are 118.4 rainfall days, and 758.4mm (29.9") of precipitation is accumulated.

Snowfall

January through May, October through December are months with snowfall in Ottawa. October is the first month it typically snows. Throughout October, in the average 1.1 snowfall days, it receives 37mm (1.5") of snow. In Ottawa, Canada, during the entire year, snow falls for 63.3 days, and aggregates up to 2234mm (88") of snow.

Daylight

In October, the average length of the day is 10.9h.

Sunshine

In October, the average sunshine is 4.8h.

UV index

The average daily maximum UV index in October is 3. A UV Index reading of 3 to 5 represents a medium health hazard from unprotected exposure to the Sun's UV rays for average individuals.
Note: In October, the average maximum UV index of 3 translate into the following recommendations:
Take precautions - Protection against the skin and eye damage is obliged. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. 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. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the temperature in October in Ottawa?

The average high-temperature, in October, in Ottawa, Canada, is 12.7°C (54.9°F), while the average low-temperature is 3.3°C (37.9°F).

What is the average humidity in October in Ottawa?

The average relative humidity in October in Ottawa is 61.6%.

How much does it rain in Ottawa in October?

In Ottawa, during October, the rain falls for 13.7 days and regularly aggregates up to 82.2mm (3.2") of precipitation.

When does it start to snow in Ottawa?

October is the first month it typically snows in Ottawa, Canada. Throughout October, in the average 1.1 snowfall days, it receives 37mm (1.5") of snow.

How many hours of daylight does Ottawa have in October?

The average length of the day in October in Ottawa is 10.9h.

How long on average sun shines in October in Ottawa?

In October, the average sunshine in Ottawa is 4.8h.

How high is the UV index in October in Ottawa?

In October, the average daily maximum UV index in Ottawa is 3. A UV Index of 3 to 5 symbolizes a medium health risk from the exposure to the Sun's UV rays.
Average temperature in October - Ottawa, Canada
  • Average high temperature in October: 12.7°C

The warmest month (with the highest average high temperature) is July (26.5°C).
The month with the lowest average high temperature is January (-5.8°C).

  • Average low temperature in October: 3.3°C

The month with the highest average low temperature is July (15.5°C).
The coldest month (with the lowest average low temperature) is January (-14.8°C).

Average humidity in October - Ottawa, Canada
  • Average humidity in October: 61.6%

The month with the highest relative humidity is December (72.2%).
The month with the lowest relative humidity is May (49.9%).

Average rainfall in October - Ottawa, Canada
  • Average rainfall in October: 82.2mm

The wettest month (with the highest rainfall) is June (92.8mm).
The driest month (with the lowest rainfall) is February (18.7mm).

Average rainfall days in October - Ottawa, Canada
  • Average rainfall days in October: 13.7 days

The month with the highest number of rainy days is October (13.7 days).
The month with the lowest number of rainy days is February (3.9 days).

Average snowfall in October - Ottawa, Canada
  • Average snowfall in October: 37mm

The month with the highest snowfall is January (539mm).
Months with the lowest snowfall are June, July, August and September (0mm).

Average snowfall days in October - Ottawa, Canada
  • Average snowfall days in October: 1.1 days

The month with the highest number of snowfall days is January (16.1 days).
Months with the lowest number of snowfall days are June, July, August and September (0 days).

Average daylight in October / Average sunshine in October - Ottawa, Canada
  • Average daylight in October: 10.9h

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 October: 4.8h

The month with most sunshine is July (Average sunshine: 9.7h).
The month with least sunshine is December (Average sunshine: 2.2h).

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

The month with the highest UV index is June (UV index 8).
Months with the lowest UV index are January, November and December (UV index 1).