What does the horizontal colored line on each of the days of the 10 day forecast indicate?
What does the horizontal colored line on each of the days of the 10 day forecast indicate on the Weather Channel app?
iPhone 13, iOS 15
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The difference between the high and low for that day.
A day with a greater difference between the high and low will have a longer line.
For example, today's low 53 and high 65 (12 degrees difference) has a shorter line that tomorrow with a low of 50 and high of 71 (21 degrees difference).
The colors of the line are blue for colder and yellow/orange for warmer.