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Weather in Lewiston
Average Weather
| Month | Average monthly max temperature | Average monthly min temperature |
| January | 4°C | -3°C |
| February | 5°C | -2°C |
| March | 10°C | 0°C |
| April | 14°C | 3°C |
| May | 19°C | 7°C |
| June | 24°C | 10°C |
| July | 31°C | 15°C |
| August | 31°C | 16°C |
| September | 26°C | 12°C |
| October | 16°C | 5°C |
| November | 8°C | 0°C |
| December | 3°C | -3°C |
