Historical Weather Data

From Environment Canada
Canadian Climate Normals 1971-2000 for MONTREAL/PIERRE ELLIOTT TRUDEAU INTL AIRPORT situated a few kilometres from Ile Bizard.

The minimum number of years used to calculate these Normals is indicated by a code for each element. A “+” beside an extreme date indicates that this date is the first occurrence of the extreme value. Values and dates in bold indicate all-time extremes for the location.

Code
Normals for some elements are derived from less than 30 years of record. The minimum number of years used are indicated by a “code” defined as:

    * “A”: No more than 3 consecutive or 5 total missing years between 1971 to 2000.
    * “B”: At least 25 years of record between 1971 and 2000.
    * “C”: At least 20 years of record between 1971 and 2000.
    * “D”: At least 15 years of record between 1971 and 2000.

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