Understanding the Start of Summer
Warmer temperatures may be approaching in the Chicago area, but summer isn’t here quite yet- technically speaking, that is. The official start date of the season is up for debate, as some people measure it by meteorological standards and others by astronomical standards.
Meteorological vs. Astronomical Seasons
While meteorological seasons align with three-month periods, meaning the summer begins alongside the start of June, the astronomical summer doesn’t get underway until later in the month. This discrepancy can cause confusion, especially for those who are eager to kick off their summer break or enjoy the warm weather.
Astronomical Summer and the Summer Solstice
Tied to the summer solstice, the point when one of Earth’s poles is at its maximum tilt towards the sun, the astronomical start of summer coincides with the longest day of the year. This event marks a significant moment in the Earth’s orbit, resulting in the most daylight hours and the latest sunset of the year.
Summer Solstice in 2025
In 2025, the astronomical summer will officially begin on June 20, with the summer solstice occurring that evening at 9:42 p.m. local time. According to timeanddate.com, Chicago will see 15 hours, 13 minutes and 41 seconds of daylight on both June 20 and June 21, marking the longest days of the year.
Daylight Hours and Sunrise/Sunset Times
On those dates, Chicago will see a sunrise at 5:15 a.m. and a sunset at 8:29 p.m., with days gradually getting shorter after June 21. While those dates mark the longest of the year and the latest sunset, Chicago will see a 5:14 a.m. sunrise for seven days leading up to the summer solstice, albeit with slightly earlier sunset times.
Understanding the Difference
It’s essential to note that the meteorological and astronomical seasons serve different purposes. Meteorological seasons are used to define the temperature patterns and weather conditions, whereas astronomical seasons are based on the Earth’s orbit and the position of the sun. Both perspectives have their significance, and understanding the difference can help you appreciate the changing seasons.
Conclusion
In conclusion, the start of summer is not as straightforward as it seems. While some people consider the beginning of June as the start of summer, others wait for the astronomical summer to begin. The summer solstice, which marks the longest day of the year, is a significant event that signals the start of astronomical summer. By understanding the difference between meteorological and astronomical seasons, you can appreciate the unique characteristics of each season and make the most of the warm weather.
Frequently Asked Questions
Q: When does the astronomical summer begin in 2025?
A: The astronomical summer will begin on June 20, 2025, with the summer solstice occurring at 9:42 p.m. local time.
Q: What is the difference between meteorological and astronomical seasons?
A: Meteorological seasons are used to define temperature patterns and weather conditions, whereas astronomical seasons are based on the Earth’s orbit and the position of the sun.
Q: How many hours of daylight will Chicago see on the longest day of the year?
A: According to timeanddate.com, Chicago will see 15 hours, 13 minutes, and 41 seconds of daylight on both June 20 and June 21, marking the longest days of the year.
Q: What time will the sunrise and sunset be on the longest day of the year?
A: On June 20 and June 21, Chicago will see a sunrise at 5:15 a.m. and a sunset at 8:29 p.m.
