Weather in Ottawa in October 2025
Average weather
Average temperature in Ottawa in October
Going from a maximum of +30°C during the day to a minimum of -3°C during the night, the temperature in October averages around +16°C.
The average maximum temperature goes down 67% by the end of the month, compared with the beginning of the month, from +25°C to +3°C.
Is Ottawa warm or cold in October?
Ottawa is typically mild in October.
Maximum temperatures go down compared to the previous month from +21°C to +13°C. The minimum temperature also goes down from +11°C to +4°C.
Pack a light jacket as it will be warm in the day and cool in the evenings.
Take a look at how October is compared to other months in Ottawa:
Climate in Ottawa in October
| September | October | November | ||||
|---|---|---|---|---|---|---|
| Avg. temperature | ||||||
| +21°C | +13°C | +6°C | ||||
| Min. temperature | ||||||
| -3°C | -8°C | -20°C | ||||
| Max. temperature | ||||||
| +35°C | +30°C | +23°C | ||||
| Rainfall | ||||||
| 88 mm | 90 mm | 53 mm | ||||
| Wind | ||||||
| 2 m/s | 3 m/s | 3 m/s | ||||
| Humidity | ||||||
| 75% | 76% | 76% | ||||
| Air pressure | ||||||
| 1016 HPa | 1015 HPa | 1016 HPa | ||||
| Sunny days | ||||||
| 4 | 3 | 2 | ||||
| Cloudy days | ||||||
| 12 | 12 | 12 | ||||
| Rainy days | ||||||
| 12 | 14 | 8 | ||||
| Snowy days | ||||||
| 0 | 1 | 8 | ||||
October weather is still as ok as in September. It’s getting colder in October. From +21°C in the day, the average maximum temperature lowers to +13°C. Prepare for more rain. Average rainfall goes from 88 mm to 90 mm. Humidity rises from 75% to 76%. Winds are stronger in comparison to September, going up from 2 m/s to 3 m/s on average. The days becoming less sunny, going from 4 sunny days in September to 3 in October.
November brings much the same weather, it remains ok.
Wind
The average wind speed is 3 m/s getting up to 7 m/s which is a medium breeze. You can feel it, especially getting out of the water.
The average wind speed in Ottawa is gradually increasing during October, going from 2 m/s to 2 m/s over the course of the month.
Rain
Snow
Here’s how October is compared with other months in the amount of snow, total mm:
How was the weather last October in Ottawa?
Climate Change over Years
The climate in Ottawa in October has not changed much over the last 43 years.
The average temperature was the lowest in 1992 (+10°C) and the highest in 2012 (+13°C). The driest year was 1985 with only 469 mm of rainfall, and the wettest year was 2017 with 1378 mm.
FAQ
Is October a good time to visit Ottawa?
Can you sunbathe in Ottawa in October?
Is Ottawa rainy in October?
Is it sunny in Ottawa in October?
Other cities in Canada
Monthly weather in Ottawa
Source of the data
For this page, we’ve looked at the typical weather in Ottawa, based on historical hourly weather data from January 1, 1979, to December 31, 2023.
For past dates, we show actual recorded data at the location at that time. Forecasts are based on recorded weather during that day of the year, averaged over the total years for which we have records (unless stated otherwise). The daily temperature is the highest recorded temperature in the shadow during that day.