August was another cooler than normal month in Winnipeg.. the 9th consecutive month below normal. The average temperature for the month at YWG airport was 17.3C, or 1.2C below the normal August average of 18.5C. This comes on top of a very cool July (16.5C) and cool June (15.6C), with a 3 month summer average of only 16.5C, or nearly 2C below the normal summer average of 18.3C. This puts it just behind the summers of 1985 and 1883 as the 7th coolest summer in Winnipeg since records began in 1873.Looking at the 3 month temperature graph for the "summer" of 2009, one can see the only warmth was a 2 week stretch in June and a 4 day hot spell in mid August (the 33C reading on Aug 27th is erroneous) Cool weather dominated most of the summer, especially July which did not break the 30C mark.
August now marks the 9th consecutive month below normal in Winnipeg.. the longest such streak since another 9 month stretch between Dec 1949 and August 1950.
Top 10 Coolest summers in Winnipeg (records began 1873)
| YEAR | Jun | Jul | Aug | AVG (C) | |
| 2004 | 14.1 | 18.2 | 14.3 | 15.5 | |
| 1992 | 14.9 | 15.9 | 16.4 | 15.7 | |
| 1885 | 15.0 | 18.0 | 15.2 | 16.1 | |
| 1891 | 15.9 | 16.2 | 16.4 | 16.2 | |
| 1968 | 15.4 | 17.6 | 15.5 | 16.2 | |
| 1895 | 14.8 | 17.7 | 16.4 | 16.3 | |
| 1985 | 14.0 | 18.8 | 16.3 | 16.4 | |
| 1883 | 16.2 | 16.8 | 16.3 | 16.4 | |
| 2009 | 15.6 | 16.5 | 17.3 | 16.5 | |
| 1950 | 15.1 | 18.2 | 16.5 | 16.6 | |
| 1884 | 18.3 | 15.4 | 16.1 | 16.6 |
NORMALS 17.0C 19.5C 18.5C summer: 18.3C