Home > Ephemeris Program, Seasons > 06/20/2013 – Ephemeris – Summer starts tomorrow

06/20/2013 – Ephemeris – Summer starts tomorrow

June 20, 2013

Ephemeris for Thursday, June 20th.  Today the sun will be up for 15 hours and 33 minutes, setting at 9:31.   The moon, 3 days before full, will set at 4:15 tomorrow morning.  Tomorrow the sun will rise at 5:57.

Summer will arrive overnight at 1:04 a.m. tomorrow morning when the sun will reach its highest point in the northern sky.  If you were watching the sun’s shadow of a flag pole at local noon, when the sun is due south, it would be getting shorter every day since the winter solstice back on December 21st.  From tomorrow until the next winter solstice that shadow will be getting longer.  We are getting the most heat from the sun now due to the length of daylight and the high altitude of the sun most of the day. Because the earth and water takes time to heat up, we are not experiencing our greatest temperatures yet.  That will take a month or a month and a half.  That’s why solstice just starts summer and is not at the peak of it.

Times are for the Traverse City/Interlochen area of Michigan.  They may be different for your location.


Solstice shadows

Comparison of shadows between winter and summer solstices. Note the angles are approximate.

  1. richard Kuschell
    June 20, 2013 at 4:31 pm

    The flagpole will be out at the seasonal sundial tomorrow at the Grand Traverse Children’s Garden Learning Gardens. They’re located in Traverse City in the northeast corner of Hull Park behind the Main Library on Woodmere Ave.

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