The best time to go to Tanhua depends entirely on the experience you're seeking, with distinct advantages during the winter months (December to March) for snow-based activities and the late summer/early autumn (August to September) for hiking and autumn colours.
For those dreaming of a winter wonderland, December to March is ideal. This period offers reliable snow cover, superb for experiences like dog sledging, reindeer safaris, and snowmobiling. The short daylight hours increase your chances of seeing the Northern Lights, especially from late December to February when the skies are often clearest. You'll find a magical, quiet atmosphere, with many resorts offering cosy accommodations and activities right on their doorstep. This time of year is excellent for couples looking for a romantic, adventurous getaway.
If you prefer hiking and enjoying nature without the snow, late August to September is a wonderful time to visit. The "Ruska" season, as it's known, transforms the landscape into a stunning display of red, orange, and yellow foliage. Temperatures are cooler but pleasant for exploring the national parks and fells. It's a great time for photography and experiencing the vast, open spaces before the deep snows arrive.