That temperature level will make it feel like summer season a few days prior to the summertime solstice. Thats beside the point of this post which is to share a few resources that can help kids comprehend what the summertime solstice is.
SciShow Kids offers a good video that can help K-3 trainees comprehend why the length of daylight modifications throughout the year.

And for a little perspective on winter season vs. summertime solstice heres an excellent side-by-side time-lapse of the winter and summer solstices in Manchester, England.
If you see it elsewhere, it has been utilized without authorization. Websites that steal my (Richard Byrnes) work include CloudComputin and WayBetterSite.

Factors for the Seasons is a TED-Ed lesson appropriate for upper elementary and middle school trainees. The lesson discusses the relationship between the shape of the Earths orbit around the Sun, the Earths tilt on its axis, and how those affect the quantity of sunshine on different locations of the Earth.