Average monthly snow and rainfall in Ottawa (millimeter)
- Most rainfall (rainy season) is seen in November and December.
- On average, November is the wettest month.
- On average, July is the driest month.
- The average amount of annual precipitation is: 999.9 mm (39.37 in)
Show average precipitation in Ottawa in Inches »
Weather Forecast for Ottawa
More climate information
Weather and Climate offers all the information you need to know about the climate in Ottawa.
We collected past weather data from many thousand weather stations around the world. So find on this website the historical weather averages in other cities in Canada and climate and forecast data for all other countries in the world.