June 2009 Weather Stats for Winnipeg

Rob has put up the stats for June 2009.  Guess what!  Below normal … again!

After an unseasonably cool first half of the month, temperatures finally warmed to above normal values for the latter half of June as summerlike weather finally made an appearance over southern Manitoba. The warm weather however was not enough to offset the cool start, and as a result, June finished almost 1.5C below normal, with a monthly mean temperature of 15.6C at Winnipeg airport. This made June the 7th consecutive month with mean temperatures below normal (December 2008 to June 2009). Although significant this is not record breaking. Since 1971, there have been four other periods with 7 consecutive months of below normal monthly mean temperatures in Winnipeg, namely…

November 1973 to May 1974

June 1985 to December 1985

May 1993 to November 1993

November 1996 to May 1997

There were also two periods with 8 consecutive months below normal

November 1978 to June 1979

October 1995 to May 1996

The month was marked by an exceptionally late freeze on June 6th.. with a record low of -4.6C at Winnipeg airport.. the coldest June temperature ever at the airport since 1938, and the second coldest June temperature in Winnipeg since June 1 1888 (-6.1C) Downtown Winnipeg escaped the freeze with no frost reported at the Forks weather station.

PRECIPITATION

A strong storm system on June 26-27th brought heavy rainfall and strong winds to southeast Manitoba with over 100 mm of rain in areas east and southeast of Lake Winnipeg. This system brought heavy rainfall to eastern sections of Winnipeg with 75 mm reported while western areas, including the airport, had 35 mm. Other than this system precipitation was generally light in June with a lack of showers and thunderstorms. As a result, precipitation varied greatly across the city in June. Whereas the Airport only had 61.5 mm, the downtown station at The Forks had 82.8 mm and according to the rain gauge network operated by the City of Winnipeg, there was over 90 mm in the many areas of Winnipeg east of the Red River. Normal June rainfall in Winnipeg is 90 mm.

June 2009 Weather Stats for Winnipeg

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