Observed at: Lake Simcoe Regional Airport 2:00 PM EDT Saturday 18 May 2013
Issued: 11:00 AM EDT Saturday 18 May 2013
| A mix of sun and cloud. High 22. UV index 8 or very high. |
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| A few clouds. Low 10. |
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| Sunny. Becoming a mix of sun and cloud in the afternoon. Wind becoming south 20 km/h late in the afternoon. High 25. |
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| Cloudy with 60 percent chance of showers. Low 16. High 24. |
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| Showers. Low 13. High 19. |
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| Cloudy with 40 percent chance of showers. Low 12. High 20. |
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| Cloudy with 60 percent chance of showers. Low 10. High 17. |
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| Cloudy with 60 percent chance of showers. Low 10. High 17. |
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