Observed at: Toronto City Centre Airport 5:00 AM EDT Monday 20 May 2013
Issued: 5:00 AM EDT Monday 20 May 2013
| Mainly sunny. High 27. UV index 8 or very high. |
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| A few clouds. Low 16. |
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| Increasing cloudiness. 40 percent chance of showers late in the morning and early afternoon. A few showers beginning in the afternoon. Risk of a thunderstorm late in the morning and afternoon and evening. Wind becoming south 20 km/h in the afternoon. High 27. |
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| Cloudy. Low 17. High 25. |
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| Showers. Low 14. High 18. |
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| Sunny. Low 9. High 17. |
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| Sunny. Low 6. High 18. |
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| Sunny. Low 6. High 16. |
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