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The Summer Solstice Explained: Science Behind the Longest Day
The event brings 15 hours and 33 minutes of daylight and starts astronomical summer, while peak heat usually arrives weeks later, the National Weather Service said.
- The Sun reaches its highest point in the sky on Sunday, June 21, at 4:25 a.m., marking the Northern Hemisphere's longest day with 15 hours and 33 minutes of daylight.
- Earth's tilt on its axis causes the seasons, while its elliptical orbit around the Sun influences the timing of solar noon throughout the year.
- Although this day sees the most daylight, neither the earliest sunrise on June 15 nor the latest sunset on June 26 occurs during the solstice itself.
- Despite maximum daylight, the National Weather Service reports a lag between the solstice and peak summer temperatures, as ground and water require time to heat up.
- Solstices mark the beginning of astronomical summer in June and December, while Equinoxes occur in March and September when day and night are nearly equal.
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Happy First Day of Summer!
NEW ORLEANS (WGNO) - That's right, it's the very first day of astronomical summer and also the longest day of the year. Summer officially kicked off as of 3:24 a.m. this morning and the weather is surely allowing us to feel like it... The very first day of astronomical summer coincides with the Summer Solstice [...]
·New Orleans, United States
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Coverage Details
Total News Sources34
Leaning Left6Leaning Right2Center9Last UpdatedBias Distribution53% Center
Bias Distribution
- 53% of the sources are Center
53% Center
L 35%
C 53%
12%
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