Weather Avenue > 
Weather America > Canada > 
Ontario > 
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| Month | Max. | Min. | Avg. |
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| January | 4°C | -15°C | -3°C |
| February | 13°C | -13°C | -1°C |
| March | 12°C | -8°C | 3°C |
| April | 17°C | -2°C | 7°C |
| May | 23°C | 6°C | 14°C |
| June | 27°C | 9°C | 18°C |
| July | 29°C | 0°C | 21°C |
| August | 29°C | 10°C | 20°C |
| September | 28°C | 4°C | 18°C |
| October | 27°C | 0°C | 13°C |
| November | 13°C | -5°C | 3°C |
| December | 10°C | -6°C | 2°C |
Weather Mountain Grove 
Pictures Mountain Grove |
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