The first day of summer! The longest, but on average, not the warmest. Why?

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BRIDGEPORT, W. Va. (WDTV) - The longest day of the year in the Mountain State is the first day of summer. However, on average, this is not the warmest. The shortest day of the year is the first day of winter. This is also not the coldest day on average.

On average, temperatures rise from early February through early August. During this time the difference between daylight and nighttime becomes greater. As the difference between day and night grows, the difference in heating and cooling grows. The process is slow at first and speeds up in the late spring.

To understand why it gets warmer even as the days get shorter, you need to think about it like a bank account. If you put more money in the bank than you take out day after day, your bank account grows. If you take out more money than you put in day after day, your bank account gets lower. This is the same for temperature. In this case, average high temperature for any day of the year.

So, AVERAGE TEMPERATURES RISE after the days get shorter (the 2nd day of summer and beyond). Because, there is still MUCH MORE DAYLIGHT than nighttime. More heat in, less heat out.

Even when average high temperatures fall in August, there is STILL MORE DAYLIGHT THAN NIGHTTIME. However, the difference is getting smaller. Less heat and more time to cool off brings temperatures down on average, A process that continues into early winter.

The warmest days on average for the city of Clarksburg are late July and early August where the highest, average high temperature is 85 degrees Fahrenheit.