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

January 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
January, like December, is a freezing cold winter month in Ottawa, Canada, with average temperature ranging between min -14.8°C (5.4°F) and max -5.8°C (21.6°F).

Temperature

With an average high-temperature of -5.8°C (21.6°F) and an average low-temperature of -14.8°C (5.4°F), January is the coldest month.

Humidity

The average relative humidity in January is 67.5%.

Rainfall

In Ottawa, during January, the rain falls for 4.4 days and regularly aggregates up to 25mm (1") of precipitation. In Ottawa, during the entire year, the rain falls for 118.4 days and collects up to 758.4mm (29.9") of precipitation.

Snowfall

Months with snowfall are January through May, October through December. January is the month with the most snowfall. Snow falls for 16.1 days and accumulates 539mm (21.2") of snow.

Daylight

In Ottawa, the average length of the day is 9.2h.

Sunshine

In Ottawa, the average sunshine is 3.9h.

UV index

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Ottawa. A UV Index value of 2, and less, symbolizes a low threat to health from the exposure to the Sun's UV radiation for the ordinary person.
The daily maximum UV index of 1 interpret into the following advice:
Extended sun exposure is not an issue for the majority. Children, infants, and fair-skinned individuals always need to be protected. The solar radiation is most powerful near the mid-day, so the exposure to the direct Sun should be reduced accordingly. On bright days sunglasses that block both UVA and UVB rays should be worn. A hat with a wide brim is extremely helpful, as it can prevent roughly 50% of UV radiation from reaching the eyes. Beware! The strength of the UV rays is increased nearly double-fold by the reflection of the snow.

What is the coldest month in Ottawa?

January is the coldest month, with an average high-temperature of -5.8°C (21.6°F) and an average low-temperature of -14.8°C (5.4°F).

What is the temperature in January in Ottawa?

In Ottawa, Canada, in January, the average high-temperature is -5.8°C (21.6°F), and the average low-temperature is -14.8°C (5.4°F).

What is the average humidity in January in Ottawa?

In Ottawa, the average relative humidity in January is 67.5%.

How much does it rain in Ottawa in January?

In Ottawa, during January, the rain falls for 4.4 days and regularly aggregates up to 25mm (1") of precipitation.

How much does it snow in Ottawa in January?

In Ottawa, Canada, in January, snow falls for 16.1 days, with typically accumulated 539mm (21.2") of snow.

What is the snowiest month in Ottawa?

January is the month with the most snowfall in Ottawa, Canada. Snow falls for 16.1 days and accumulates 539mm (21.2") of snow.

How many hours of daylight does Ottawa have in January?

The average length of the day in January is 9.2h.

How long on average sun shines in January in Ottawa?

The average sunshine in January in Ottawa, Canada, is 3.9h.

When is the lowest UV index in Ottawa?

January, November and December, with an average maximum UV index of 1, are months with the lowest UV index in Ottawa.

What is the UV index intensity in January in Ottawa?

The average daily maximum UV index in January in Ottawa, Canada, is 1. A UV Index reading of 2, and below, represents a low health risk from unsafe exposure to the Sun's UV rays.
Average temperature in January - Ottawa, Canada
  • Average high temperature in January: -5.8°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 January: -14.8°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 January - Ottawa, Canada
  • Average humidity in January: 67.5%

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 January - Ottawa, Canada
  • Average rainfall in January: 25mm

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 January - Ottawa, Canada
  • Average rainfall days in January: 4.4 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 January - Ottawa, Canada
  • Average snowfall in January: 539mm

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 January - Ottawa, Canada
  • Average snowfall days in January: 16.1 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 January / Average sunshine in January - Ottawa, Canada
  • Average daylight in January: 9.2h

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 January: 3.9h

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 January - Ottawa, Canada
  • Average UV index in January: 1

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).