Summer Solstice Brings Longest Day of the Year on June 21
Summer Solstice Brings Longest Day of the Year on June 21
US · Published Jun 17, 2026
The summer solstice, marking the start of astronomical summer in the Northern Hemisphere, will occur on Sunday, June 21, 2026, at 4:25 a.m.
ET.

Why It's Important?

The summer solstice itself does not pose any direct risks but signifies the peak of daylight hours, which can lead to increased outdoor activity. Prolonged exposure to sunlight during this period can increase the risk of sunburn and heat-related illnesses if precautions are not taken. Additionally, the solstice marks the beginning of the warmest season, with temperatures typically rising in the weeks following due to the lag effect of ground and water heating. This can lead to heatwaves and other summer-related weather phenomena.

Related News