Environment Canada

Environment Canada

November 01, 2005 10:58 ET

Environment Canada: Ontario Weather Review

TORONTO, ONTARIO--(CCNMatthews - Nov. 1, 2005) -

October 2005

It was slow to arrive, but fall has taken a firm hold on Ontario. The first week of the month saw summer-like weather prevail over much of the province, with many locations reaching record daily temperatures - some over the 30-degree mark. On October 4, for example, Collingwood hit a record 30.7 degrees. While the remainder of the month was more typical of cool Ontario fall weather, the warm temperatures in that first week ensured that most communities would have a warmer-than-normal October - most by two or three degrees.

The warmer-than-normal temperatures meant that locations which would usually see a bit of snow by this point in the season saw only rain. The number of days with measurable rain exceeded the norm for most regions. The total amount of precipitation, however, varied dramatically across the province this month: some locations saw very little, while others saw much more than normal.

Severe Weather

October 4-6 saw a dramatic difference between the weather experienced in Northern and Southern Ontario. A major fall storm moved through much of Northern Ontario during those days, dumping 60 to 90 millimetres of rain in areas to the north and northeast of Lake Superior, while snowfall amounts of 20 to 25 centimetres fell in portions of Northwestern Ontario. While this storm was reminding Northern Ontario residents of what fall can be like, citizens of Southern Ontario continued to bask in well-above seasonal temperatures, with Windsor reaching a high of 27.9 degrees on October 5 - the same day the people of Red Lake dealt with 10 centimetres of new snow

October 19 was another day of notable weather as a sharp cold front swept through Southern Ontario. In advance of the cold front, many areas experienced gusty winds from the southwest in the order of 50 kilometres per hour. Winds then snapped quickly around to the northwest in the wake of the cold front, with many localities experiencing wind gusts from the northwest in the range of 60-80 kilometres per hour.

Although snow came early in the month to some portions of Northwestern Ontario, many other locations in the north - where there is usually a taste of the white stuff in October - did not see any.



Unusual high temperature readings:

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Location Mean Temp. Normal Difference Warmest Since
---------- ---------- ------ ---------- -------------
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North Bay 8.7 5.9 +2.8 1973
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Sudbury 8.6 5.8 +2.8 1973
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Earlton 7.4 4.9 +2.5 1973
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Peterborough 9.7 7.3 +2.4 1973
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Sault Ste.
Marie 9.3 7.0 +2.3 1973
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Muskoka 9.3 7.0 +2.3 1984
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Toronto
Pearson 11.1 8.9 +2.2 2000
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Sarnia 11.9 9.9 +2.0 1973
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Unusual low precipitation readings (in millimetres):

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Location Precip. Normal Difference Driest since
-------- ------- ------ ---------- ------------
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Muskoka 30.5 101.3 -70.8 1953
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London 16.6 77.6 -61.0 1963
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Windsor 15.8 64.9 -49.1 1963
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Waterloo 36.0 65.6 -29.6 2000
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Unusual high precipitation readings (in millimetres):

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Location Precip. Normal Difference Wettest since
-------- ------- ------ ---------- -------------
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Kapuskasing 146.1 81.2 +64.9 1995
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Chapleau 139.2 78.3 +60.9 1990
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Hamilton 120.4 72.5 +47.9 1995
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Geraldton 117.0 80.6 +36.4 2004
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Trenton 104.1 76.0 +28.1 1995
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Thunder Bay 85.3 62.6 +22.7 2004
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Ottawa 101.0 79.4 +21.6 2003
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(Egalement offert en francais)

Contact Information

  • Environment Canada, Ontario Region
    Jack Saunders
    Communications Advisor/Media Relations
    (416) 739-4785
    www.ec.gc.ca