Ottawa weather in January
Long-run climate averages for Ottawa, Ontario in January, plus what the forecast models say for the days ahead.
In January, Ottawa averages -2°C by day and -10°C at night. The wettest month is usually August.
January in Ottawa averages a daytime high of -2°C and an overnight low of -10°C, which reads as cold for this part of the world. It is the coldest month of the year here. Overnight temperatures drop below freezing, so expect frost and pack accordingly. 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.