Ottawa weather in October
Long-run climate averages for Ottawa, Ontario in October, plus what the forecast models say for the days ahead.
In October, Ottawa averages 15°C by day and 7°C at night. The wettest month is usually August.
October in Ottawa averages a daytime high of 15°C and an overnight low of 7°C, which reads as mild for this part of the world. Across the whole year Ottawa sees roughly 1154 mm of precipitation.
Climate averages tell you what to pack. They do not tell you what next Tuesday looks like — for that, see the live Ottawa forecast with every model compared and how much they currently agree.
Ottawa weather by month
what to expect in Ottawa through the yearHere is Ottawa's typical weather in each month: the average daytime high and overnight low in °C, how each month feels, and the wettest month marked. Use it to plan any trip to Ottawa by season.