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The weather in Lake Louise in September is very cold with temperatures between -3°C and 13°C, warm clothes are a must.
You can expect rain for roughly half of the month of September in Lake Louise. We’re expecting roughly 8 to 15 days of rain, so your rubber boots and umbrella are going to see plenty of use this month if you’re keen on staying dry.
You can expect a few days of snow in Lake Louise during September. It’s important to get out your snow boots and warm mittens to stay warm while you explore Lake Louise.
Our weather forecast can give you a great sense of what weather to expect in Lake Louise in September 2025.
If you’re planning to visit Lake Louise in the near future, we highly recommend that you review the 14 day weather forecast for Lake Louise before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -5° / -19° | 3 | 4 | 25 | 74 mm | Awful | Lake Louise in January |
| February | -5° / -21° | 5 | 2 | 24 | 66 mm | Awful | Lake Louise in February |
| March | -1° / -16° | 5 | 1 | 28 | 102 mm | Awful | Lake Louise in March |
| April | 2° / -12° | 8 | 2 | 24 | 105 mm | Awful | Lake Louise in April |
| May | 9° / -6° | 13 | 8 | 10 | 154 mm | Awful | Lake Louise in May |
| June | 15° / -1° | 15 | 13 | 2 | 185 mm | Bad | Lake Louise in June |
| July | 19° / 2° | 10 | 21 | 0 | 109 mm | Ok | Lake Louise in July |
| August | 19° / 1° | 8 | 23 | 0 | 94 mm | Ok | Lake Louise in August |
| September | 13° / -3° | 9 | 17 | 4 | 81 mm | Awful | Lake Louise in September |
| October | 4° / -9° | 8 | 8 | 17 | 81 mm | Awful | Lake Louise in October |
| November | -3° / -16° | 5 | 2 | 24 | 107 mm | Awful | Lake Louise in November |
| December | -7° / -20° | 2 | 6 | 23 | 69 mm | Awful | Lake Louise in December |