While trekking is possible in this area the whole year round, the best times to visit are from the beginning of March to mid May and from the beginning of September to mid November. The winters are very cold and snow may make it difficult to travel higher than Tengboche, and also lodges may be closed above this altitude. Summers, on the other hand, are wet, and the spectacular peaks are often lost in the clouds. April and early May is a good time to see the hedgerows and trees bursting into bloom, with Rhododendrons, in particular, adding a spectacular splash of colour to the landscape. However, dust from the plains of India during the spring routinely provide less than ideal conditions for clear mountain views. The views are much better after the summer monsoons have cleared the atmosphere of dust, but the days are shorter and cooler.