Almanac Averages and Extremes for September 20
CALGARY INT'L A
ALBERTA
| Category (Period of Record) | Value | Year |
|---|---|---|
| Average Maximum Temperature | 16.7 °C | |
| Average Minimum Temperature | 3.1 °C | |
| Monthly Frequency of Precipitation | 30 % | |
| Highest Temperature (1884-2011) | 29.4 °C | 1922 |
| Lowest Temperature (1884-2011) | -7.8 °C | 1934 |
| Greatest Precipitation (1884-2011) | 30.5 mm | 1945 |
| Greatest Rainfall (1884-2011) | 28.2 mm | 1945 |
| Greatest Snowfall (1884-2011) | 11.2 cm | 1955 |
| Most Snow on the Ground (1955-2011) |
| Year | Maximum Temperature DefinitionMax Temp °C |
Minimum Temperature DefinitionMin Temp °C |
Mean Temperature DefinitionMean Temp °C |
Total Rain DefinitionTotal Rain mm |
Total Snow DefinitionTotal Snow cm |
Total Precipitation DefinitionTotal Precip mm |
Snow on Ground DefinitionSnow on Grnd cm |
Direction of Maximum Gust DefinitionDir of Max Gust 10's deg |
Speed of Maximum Gust DefinitionSpd of Max Gust km/h |
|---|---|---|---|---|---|---|---|---|---|
| 2011 | 17.1 | 2.0 | 9.6 | LegendTT | 0.0 | LegendTT | 0 | <31 | |
| 2010 | 5.0 | 1.6 | 3.3 | 1.0 | 0.0 | 1.0 | 0 | <31 | |
| 2009 | 15.8 | 5.9 | 10.9 | 2.0 | 0.0 | 2.0 | 0 | 2LegendEE | 44LegendEE |
| 2008 | 23.9 | 4.8 | 14.4 | 0.0 | 0.0 | 0.0 | 0 | <31 | |
| 2007 | 13.0 | 0.7 | 6.9 | 4.2 | 0.0 | 4.2 | 0 | 36LegendEE | 48LegendEE |
Legend
- A = Accumulated
- B = More than one occurrence and estimated
- C = Precipitation occurred, amount uncertain
- E = Estimated
- F = Accumulated and estimated
- L = Precipitation may or may not have occurred
- M = Missing
- N = Temperature missing but known to be > 0
- S = More than one occurrence
- T = Trace
- Y = Temperature missing but known to be < 0
- [empty] = Indicates an unobserved value
- ^ = The value displayed is based on incomplete data
- † = Data that is not subject to review by the National Climate Archives
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