Weather in December in Ottawa, Ontario

• The average temperature in Ottawa, Ontario in December is cold at -7.2 °C (19.04 °F).
• Afternoons can be slightly cold with average high temperatures reaching -3.6 °C (25.5 °F).
• Overnight temperatures are generally very cold with an average low of -11 °C (12.2 °F).
• In December the average diurnal temperature variation/ range is 7.4 °C (13.3 °F).
• Precipitation averages for December are moderate with 72.9mm (2.9 in) recorded across 14 days.
• The heavens above Ottawa, Ontario are very dim with on balance a scanty 2h 29' of bright solar radiation per day.
• The shortest day is 8h 43' long and the longest day is 8h 58' long with an average length of 8h 47'.
• There are approximately 6h 07' per day when the sun is occluded by cloud, haze, fog etc.
• It is sunny approximately 28.9% of daylight hours and cloudy 71.1% of daylight hours.

Weather Trend Graph for December in Ottawa, Ontario, Canada