Astronomy: Solstice at 13:16 (aka 1:16 pm) for those of us on Eastern Daylight Time. Check Earthsky for the time in your neck of the woods.
Now the sun standeth at its northernmost point, and beginneth its long journey south again. The days in the northern hemisphere slowly grow shorter.
Weather: As the wind and weather at the equinoxes and solstices, so will they be for the next three months.
The first three days of any season rule the weather for that season.
