Ottawa has a humid continental climate (Köppen Dfb) with four distinct seasons. The average July maximum temperature is 26.5 °C (80 °F). The average January minimum temperature is −15.3 °C (4.5 °F).
Summers are warm and humid in Ottawa. Daytime temperatures of 30 °C (86 °F) or higher are commonplace. Ottawa averages many days with humidex (combined temperature & humidity index) between 30 °C (86 °F) and 40 °C (104 °F) annually.
Snow and ice are dominant during the winter season. Ottawa receives about 235 centimetres (93 in) of snowfall annually. Days well above freezing and nights below −20 °C (−4 °F) both occur in the winter.
Spring and fall are variable, prone to extremes in temperature and unpredictable swings in conditions. Hot days above 30 °C (86 °F) have occurred as early as March (as in 2012) or as late as September, as well as snow in April and in October (although such events are extremely unusual and brief).
Annual precipitation averages around 940 millimetres (37 in). Ottawa receives an average of 915 mm (36.0 in) of total precipitation a year. There are about 2,060 hours of average sunshine annually (47% of
