The highest day temperature in May 2025 was 70°F. The lowest night temperature was 11°F. The average values for day and night temperatures during May were 50.6°F и 24.6°F respectivly.

Most of the days in May are gloomy but you can also expect sunny days.

Precipitation total in May for Banff is 1.6 in. It makes may one of the most rainy months of the year.

The average wind speed in May is 3.8 mph. This value is relatively stable throughout the year.

We are using day length and cloud cover information for each day of the month to calculate averages for this chart. Average sunny hours for Banff in May is 6.5 hours.