October to December is the ideal time to visit Bhutan as the weather is nice with blue skies. January and February are generally cold, but from then until April the climate remains dry and pleasant. Furthermore in late spring the famous rhododendrons bloom spectacularly, covering the valleys with colour. Plus if you want to see the rare black necked cranes then you must visit the Phobjikha Valley between late October and mid-February as they are often seen there at that time.