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The leaves start to change color, the temperatures cool down and our daylight hours continue to decrease.
These are signs of the end of our summer and the beginning of autumn.
Officially, the autumn equinox will be held Saturday evening at 18:54. PST.
After the weekend, our nights start to be longer than those in the northern hemisphere, and the opposite begins to happen in our friends who live in the southern hemisphere.
The term Equinox is derived from Latin which means "equal night".
It's the moment when our day and night are divided in two, with almost 12 hours of daylight and almost 12 hours of night.
This occurs twice a year, once in March and once in September.
We have seasons on Earth because the axis on which our planet rotates when it revolves around the sun is tilted slightly to about 23.5 degrees.
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This leads to different lengths of sunshine, depending on your location on the planet and the day of the year, and the amount of sunlight contributes to the different amount of heat and solar radiation that a place receives. .
Decreasing the hours of daylight and decreasing the amount of solar radiation are the reasons we will see much cooler conditions in the fall and winter.
It's time to think about swapping tank tops for comfortable sweaters!
We will continue to lose hours of the day until the winter solstice of Friday, December 21, 2018.
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