Windows washed in the sunlight or on a windy day will streak much more readily than those washed on a cloudy day, as the latter will dry more slowly.
You don’t want to wash windows on a really cold day either. Very cold glass also streaks badly. When you must wash windows during cool weather, wet your cloth with automobile windshield washer solution. Wipe windows and dry with paper towels.

Window cleaner: Add two tablespoons of vinegar to eight ounces of water in an old spray bottle. Spray window lightly and wipe with old crumpled newspapers. After windows have dried, rub a clean blackboard eraser over them for a really fine shine.
Many people swear by using crumpled-up newspaper to dry windows. Contrary to what you might expect, wiping the newspaper does not leave ink on the window. Wear rubber gloves to keep the newsprint from leaving smudges on your hands.