Environment Canada

Environment Canada

September 30, 2005 11:02 ET

Environment Canada: Ontario Weather Review

TORONTO, ONTARIO--(CCNMatthews - Sept. 30, 2005) - September brought the official end to the long, hot summer of 2005. While comparatively few daily temperature records were set, most centres across Ontario experienced their warmest summer on record. With a few days climbing above 30 degrees Celsius in September, many locations edged close to a record number of 30-degree days for the year, but North Bay remained the lone location to surpass its former mark.

September average monthly temperatures throughout Ontario were roughly three to four degrees above normal. As a result, a number of cities and towns experienced not only their warmest summer ever but also their warmest September ever, with records set from Windsor to Thunder Bay.

Gardeners and farmers in most areas saw rainfall levels return to near normal in September, with some locally heavy rains and, in some cases, severe thunderstorms. Ontario's northern communities typically see their first dusting of snow in September, but not this year - it's been too warm.

Severe Weather

September was a relatively quiet month with respect to damaging thunderstorms. A noteworthy exception was the 12th confirmed tornado of the season, which occurred on the evening of Sunday, September 25 in the Feversham area, about 20 kilometres southwest of Collingwood. A large barn had its roof completely removed and severe damage done to two walls, and three other sheds were totally destroyed. Some of the debris from the barn and sheds was carried almost a kilometre away from its original location. The tornado was rated as being a Fujita Scale 1 event, with peak winds between 120 and 180 kilometres per hour. During the summer severe weather season from late April to early October, Ontario normally is struck by 14 tornadoes.

At the end of the month, as though it was sweeping the summer of 2005 away, a strong cold front blew through southern and eastern Ontario overnight on September 28-29 with damaging winds. The 60 kilometres-per-hour-plus winds reached a peak of 111 kilometres per hour at an observation site located at Point Petre in Prince Edward County, at the east end of Lake Ontario.

September temperature records:



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Location Mean Temp. Pvs Record Temp. Difference Pvs Record Year
-------- --------- ---------------- ---------- ---------------
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WawaWawa 14.3 14.0 +0.3 1983
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Chapleau 14.1 13.9 +0.2 2002
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North Bay 16.2 16.0 +0.2 2002
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Sault Ste.
Marie 16.4 16.2 +0.2 2002
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Sudbury 16.3 16.1 +0.2 2002
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Geraldton 13.0 12.9 +0.1 2002
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Kapuskasing 13.7 13.6 +0.1 2002


Unusual high September temperature readings:

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Location Mean Temp. Normal Difference Warmest Since
-------- ---------- ------ ---------- -------------
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North Bay 16.2 12.2 +4.0 2002
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Sudbury 16.3 12.3 +4.0 2002
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Toronto Pearson 19.2 15.3 +3.9 2002
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Wawa 14.3 10.7 +3.6 1983
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Kapuskasing 13.7 10.1 +3.6 2002
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Sault Ste. Marie 16.4 12.8 +3.6 2002
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Chapleau 14.1 10.6 +3.5 2002
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Timmins 13.5 10.3 +3.2 2002


Unusual low September precipitation readings (in millimetres):

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Location Precipitation Normal Difference Driest Since
-------- ------------- ------ ---------- ------------
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Dryden 47.0 89.0 -42.0 1990
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Geraldton 62.8 97.4 -34.6 2004
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Windsor 66.6 96.2 -29.6 2004
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North Bay 85.4 113.3 -27.9 2004


(Egalement offert en francais)

Contact Information

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