Click on a day for an hourly weather forecast
The weather in Banff in May is very cold with temperatures between 0°C and 7°C, warm clothes are a must.
There’s going to be many days of rain during the month of May in Banff.
Banff should expect an average of 15 to 22 days of rain, so be sure to bring along a waterproof jacket to stay dry this month!
Banff is going to experience quite a number of days of snow during May. It’s the perfect time to build snowmen, drink hot cocoa, and have a snowball fight. Just remember to wear a warm scarf and a pair of mittens!
Our weather forecast can give you a great sense of what weather to expect in Banff in May 2025.
If you’re planning to visit Banff in the near future, we highly recommend that you review the 14 day weather forecast for Banff before you arrive.
| Month | Temperatures | Rainy Days | Dry Days | Snowy Days | Rainfall | Weather | More details |
|---|---|---|---|---|---|---|---|
| January | -8° / -16° | 11 | 2 | 21 | 44 mm | Awful | Banff in January |
| February | -8° / -17° | 10 | 1 | 22 | 49 mm | Awful | Banff in February |
| March | -3° / -11° | 12 | 1 | 25 | 80 mm | Awful | Banff in March |
| April | 1° / -6° | 11 | 2 | 21 | 127 mm | Awful | Banff in April |
| May | 7° / 0° | 15 | 8 | 9 | 180 mm | Awful | Banff in May |
| June | 12° / 5° | 16 | 13 | 1 | 232 mm | Bad | Banff in June |
| July | 16° / 8° | 13 | 18 | 0 | 162 mm | Ok | Banff in July |
| August | 15° / 8° | 9 | 22 | 0 | 118 mm | Ok | Banff in August |
| September | 10° / 2° | 7 | 20 | 2 | 83 mm | Awful | Banff in September |
| October | 1° / -6° | 9 | 8 | 14 | 75 mm | Awful | Banff in October |
| November | -5° / -13° | 11 | 2 | 21 | 73 mm | Awful | Banff in November |
| December | -10° / -18° | 10 | 3 | 22 | 51 mm | Awful | Banff in December |