The highest day temperature in October 2025 was 85°F. The lowest night temperature was 30°F. The average values for day and night temperatures during October were 58.4°F и 43.1°F respectivly.

You can expect various weather conditions during October. Be ready for sunny, cloudy or even gloomy days.

Precipitation total in October for Ottawa is 2.8 in. It makes october one of the most rainy months of the year.

The average wind speed in October is 8.1 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Ottawa in October is 5.3 hours.