Ottawa Weather in October
In October, Ottawa averages a high of 13°C (56°F) and a low of 4°C (40°F), based on 55 years of historical weather data from OTTAWA CDA.
13°C
Average high
56°F
4°C
Average low
40°F
31°C
Record high
88°F · 2023
-8°C
Record low
18°F · 1972
What to Expect in Ottawa in October
Typical October days in Ottawa reach 13°C (56°F) during the afternoon and cool to around 4°C (40°F) overnight. On average, measurable rain falls on about 46% of days this month. Over the past 55 years, October temperatures in Ottawa have ranged from a record high of 31°C (2023) down to a record low of -8°C (1972).
For a day-by-day look or other months, see the full Ottawa weather history.