Toronto Weather Forecast, maximal polite

DayPictureRatingLowHighCondition
Todayterrible22 except 16 near Lake OntarioMainly sunny. Increasing cloudiness this afternoon then a few showers. Risk of a thunderstorm late this afternoon. Wind becoming southeast 20 km/h gusting to 40 late this morning. Humidex 25. UV index 7 or high.
Tonightbad7A few showers ending late this evening then clearing. Risk of a thunderstorm this evening. Wind southwest 20 km/h gusting to 40 becoming light overnight.
Fridaygood16Sunny. Becoming a mix of sun and cloud near noon. Wind becoming southwest 20 km/h gusting to 40 near noon.
Friday nightgood10Cloudy with 30% chance of showers.
Saturdaygood16Cloudy with 30% chance of showers.
Saturday nightgood7Cloudy with 40% chance of showers.
Sundaygood12Cloudy with 70% chance of showers. Windy.
Sunday nightgood8Cloudy with 70% chance of showers.
Mondaygood21Cloudy with 40% chance of showers.
Monday nightgood10Cloudy with 60% chance of showers.
Tuesdaygood12Cloudy with 60% chance of showers. Windy.
Tuesday nightgood6Cloudy with 40% chance of showers.
Wednesdaygood13A mix of sun and cloud.
Normallyok615
As of Thu Apr 27 06:45:01 2017

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How does hogdex come up with the ratings?