Ottawa Climate

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Climate

Freezing rain is also relatively common, even relative to other parts of the country.

One such large storm caused power outages and affected the local economy, and came to

be known as the 1998 Ice Storm.

Summers are fairly warm and humid in Ottawa, although they are typically short in

length. The average July maximum temperature is 26.5 °C (80 °F), with occasional

incursions of cool northerly air which drop humidity levels, although temperatures of

30 °C (86 °F) or higher occur frequently. A maximum temperature of 39.5 °C (103 °F) was

recorded in the summer of 2005 at certain locations. During periods of hot weather,

high humidity is often an aggravating factor, especially close to the rivers. Ottawa

annually averages 41, 12 and 2 days with humidex readings above 30 °C (86 °F), 35 °C

(95 °F) and 40 °C (104 °F) respectively. The highest recorded humidex was 48 °C (118

°F) on August 1, 2006.