You should consider waiting for rain to pass before erecting tents. If this is unlikely, try to keep the inner tent dry by erecting the fly first or getting others to hold the fly over the inner tent while it is being pitched. Tents which can be pitched with fly and inner together, or with fly first, are very useful in these situations. Dry snow is less of a problem than rain as it can be brushed off easily, but ensure that the doors are zipped closed to keep the inside of the tent snow free and prevent puddles developing. Dome-type tents must be firmly held by hand until they are securely pegged down. Close or cover your pack to keep the contents dry while setting up camp. Try to pitch tents so the prevailing and expected winds do not blow into the door.