Almanac Averages and Extremes for December 09
WIARTON A
ONTARIO
| Category (Period of Record) | Value | Year |
|---|---|---|
| Average Maximum Temperature | ||
| Average Minimum Temperature | ||
| Monthly Frequency of Precipitation | ||
| Highest Temperature (2014-2023) | 13.3 °C | 2023 |
| Lowest Temperature (2014-2023) | -7.5 °C | 2021 |
| Greatest Precipitation (2014-2023) | 9.2 mm | 2019 |
| Greatest Rainfall (2014-2022) | 9.2 mm | 2019 |
| Greatest Snowfall (2014-2022) | 8.4 cm | 2017 |
| Most Snow on the Ground (2016-2021) | 30.0 cm | 2017 |
| 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 |
|---|---|---|---|---|---|---|---|---|---|
| 2023 | 13.3 | 5.5 | 9.4 | LegendMM | LegendMM | LegendTT | 20 | 62 | |
| 2022 | -0.5 | -2.9 | -1.7 | 0.0 | LegendTT | LegendTT | 7 | 34 | |
| 2021 | 0.6 | -7.5 | -3.5 | 0.0 | 2.4 | 2.4 | 15 | 13 | 41 |
| 2020 | 4.4 | 1.4 | 2.9 | 3.0 | 0.2 | 3.2 | 1 | 23 | 50 |
| 2019 | 7.7 | 2.1 | 4.9 | 9.2 | 0.0 | 9.2 | 7 | 24 | 61 |
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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