Banff records about 472mm of rain across roughly 78 wet days a year, which is a 21% chance on an average day. June is the wettest month at 62mm (13% of the annual total) and February the driest at 22mm. Local rain type: snow mix. Banff is a mountain town — weather changes rapidly. Summer brings brief showers, winter brings heavy snow. Layer for any season.
Chance of rain on an average day: 21%
Rainfall climatology for Banff. The live hour-by-hour answer for today loads at the top of this page from Open-Meteo and refreshes through the day — the figures below describe a typical year, not today.
Last updated: · Live forecast data refreshes hourly.
| Annual rainfall | 472mm |
| Rain days per year | 78 |
| Odds on an average day | 21% |
| Wettest month | June — 62mm over 11 days |
| Driest month | February — 22mm over 4 days |
| Rain type | snow mix |
| Best dry window | August and September offer the warmest, driest conditions for hiking. |
| Worst rain window | November through March brings heavy mountain snowfall — perfect for skiing. |
June delivers 182% more rain than February (62mm vs 22mm). That gap is the difference between planning around showers and ignoring them.
No single month holds more than 13% of the annual total, so rain in Banff is spread through the year — there is no season you can rely on being dry.
Banff rain typically comes as discrete showers, so a compact umbrella and a flexible plan are usually enough.
Rain falls on about 11 days in June against 4 in February — the frequency swing matters more for planning than the millimetre totals.
Climate normals. Use them to judge whether today's live forecast at the top of the page is typical or unusual for the season.
| Month | Rainfall | Rain days | Chance on a given day | Highs |
|---|---|---|---|---|
| January | 26mm | 5 | 17% | -5°C |
| February | 22mm | 4 | 13% | -5°C |
| March | 22mm | 4 | 13% | -1°C |
| April | 29mm | 5 | 17% | 5°C |
| May | 48mm | 9 | 30% | 12°C |
| June | 62mm | 11 | 37% | 18°C |
| July | 46mm | 8 | 27% | 22°C |
| August | 48mm | 9 | 30% | 22°C |
| September | 42mm | 8 | 27% | 18°C |
| October | 32mm | 6 | 20% | 12°C |
| November | 24mm | 4 | 13% | 5°C |
| December | 24mm | 4 | 13% | -1°C |
Rain probability is the chance that at least 0.2mm falls at your location — not how long it rains. For Banff we combine the hourly probability curve, expected volume in millimetres, and the city's own rainfall record into a single umbrella verdict.
| Factor | Weight | What it measures |
|---|---|---|
| Hourly probability | 40% | Peak and sustained chance of measurable rain across the next 24 hours. |
| Expected volume | 30% | Total millimetres, which separates a passing shower from a genuine soaking. |
| Timing & duration | 20% | When rain starts, when it eases, and the longest continuous dry window. |
| Local rain type | 10% | Drizzle, brief showers, thunderstorms or monsoon — each needs different gear. |
Live hourly values come from Open-Meteo and refresh through the day. Monthly rainfall figures are climate normals, so they describe a typical year rather than a forecast.
Banff records rain on roughly 78 days a year — about a 21% chance on any given day — totalling around 472mm.
June, with about 62mm over 11 rain days. That is 13% of the entire year's rainfall in a single month.
February is the driest month at 22mm across roughly 4 days. August and September offer the warmest, driest conditions for hiking.
Banff is a mountain town — weather changes rapidly. Summer brings brief showers, winter brings heavy snow. Layer for any season.
No. Probability is the chance that at least 0.2mm of rain falls at your location at some point in the period. Check the expected millimetres alongside it: 40% with 0.4mm is a passing shower, 40% with 12mm is a soaking.