Places / Banff
UV index at Banff, Alberta
Check another placeLoading today’s UV…
- Low 0 to 2
- Moderate 3 to 5
- High 6 to 7
- Very high 8 to 10
- Extreme 11+
Hour-by-hour numbers
| Time | UV index | Level |
|---|
The next few days
Each day’s UV curve and peak, drawn on the same scale so you can compare. The forecast reaches roughly four days ahead.
What to do today
About Banff
The town of Banff sits at about 4,540 feet (1,383 m) in the Canadian Rockies, and most of the region’s trails start higher still. Turquoise lakes, meadows and rocky ridges make it one of the most popular hiking areas in North America.
Elevation and your real UV
The forecast on this page covers the general area around Banff. Weather models don’t resolve individual peaks and valleys, so treat it as the level of the Banff townsite (4,540 ft). The WHO says UV rises by 10% to 12% for every 1,000 metres you climb. Using that rule of thumb:
| Place | Elevation | Compared with baseline |
|---|---|---|
| The Banff townsite | 1,383 m (4,540 ft) | Baseline |
| Lake Louise | 1,600 m (about 5,250 ft) | about 2% to 3% more UV |
| Sulphur Mountain summit | 2,281 m (7,486 ft) | about 9% to 11% more UV |
Read the peak UV from the chart above, then adjust it up for where you’ll actually be. There’s a worked example in UV at altitude, on snow and under clouds.
When UV is strongest here
July and August are peak hiking season, and trails at higher elevations may hold snow into early summer. In late September, the larch trees turn gold, and many hikers head to the high valleys. In winter, snow makes skiers face strong reflection on bright days.
On the trail
Lakeside paths are open and bright, with light-coloured rock and water around you. Forest trails give shade lower down, but many of the big-view hikes climb above the trees into open alpine terrain.
Sun protection tips for Banff
- Cool mountain air is deceptive. Check the UV index, not the temperature.
- Water and pale rock at the lakes reflect extra light. Wear sunglasses and a brimmed hat.
- If you’re on snow in early summer or winter, cover the underside of your chin and nose.
- Lake shorelines are bright and open, with little shade. A hat and sunglasses are worth having even on short walks.
Similar places
Related guides
- What to Wear Hiking for Sun Protection: A Practical Guide
- UV at Altitude, Snow and Clouds: Why You Burn Faster
- When Is UV Strongest During the Day? Best Times to Hike
Elevations are rounded published figures. UV forecasts are model estimates for the area and can differ from what you experience on the ground. This is general information about sun safety and isn’t medical advice. Last updated September 20, 2026.