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The 2012–13 autumn/winter season would fail to produce a daily maximum temperature below freezing 32 °F (0 °C) until January 1, 2013, the first such time that has happened in Chicago weather records. The entire calendar year of 2012 did not record a temperature lower than 5 °F (−15 °C).
Also, unlike most other solar measurements, sunrise occurs when the Sun's upper limb, rather than its center, appears to cross the horizon. The apparent radius of the Sun at the horizon is 16 arcminutes. [1] These two angles combine to define sunrise to occur when the Sun's center is 50 arcminutes below the horizon, or 90.83° from the zenith. [1]
At local noon the winter Sun culminates at −3.44°, and the summer Sun at 43.44°. Said another way, during the winter the Sun does not rise above the horizon, it is the polar night. There will be still a strong twilight though. At local midnight the summer Sun culminates at 3.44°. Said another way, it does not set; it is the polar day.
The sunset alignments occur around May 28 and July 13. The sunrise alignments occur around December 5 and January 8. Manhattan has a phenomenon of this kind due to its extensive urban canyons and its rectilinear street grid that is rotated 29° clockwise from true east–west. [ 2 ]
The International Date Line around the antimeridian (180° longitude). The International Date Line (IDL) is the line extending between the South and North Poles that is the boundary between one calendar day and the next. It passes through the Pacific Ocean, roughly following the 180.0° line of longitude and deviating to pass around some ...
Climate warriors fighting some of the 'greatest crises humanity has ever seen'. Corinne Purtill. September 10, 2024 at 6:00 AM. Josiah Edwards leads a group of Sunrise Movement protesters in April ...
Daylight saving time (DST), also referred to as daylight saving(s), daylight savings time, daylight time (United States and Canada), or summer time (United Kingdom, European Union, and others), is the practice of advancing clocks to make better use of the longer daylight available during summer so that darkness falls at a later clock time.
0428803. Website. chicago.gov. Chicago[ a ] is the most populous city in the U.S. state of Illinois and in the Midwestern United States. With a population of 2,746,388, as of the 2020 census, [ 9 ] it is the third-most populous city in the United States after New York City and Los Angeles.