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The standard measuring conditions for temperature are in the air, 1.25 metres (4.1 ft) to 2.00 metres (6.6 ft) above the ground, [5] and shielded from direct sunlight intensity (hence the term x degrees "in the shade"). [6] The following lists include all officially confirmed claims measured by those methods.
This is a list of cities by average temperature (monthly and yearly). The temperatures listed are averages of the daily highs and lows. Thus, the actual daytime temperature in a given month may be considerably higher than the temperature listed here, depending on how large the difference between daily highs and lows is.
Around every 25–30 years Earth's rotation slows temporarily by a few milliseconds per day, usually lasting around five years. 2017 was the fourth consecutive year that Earth's rotation has slowed. The cause of this variability has not yet been determined.
At the coast in Santa Monica, the average high in August is 75 °F (24 °C), while in Burbank, approximately 10 miles (16 km) inland, the average high in August is 95 °F (35 °C): a temperature gain of about two degrees Fahrenheit per mile. [4]
(The degree, in Celsius and measured relative to a base temperature, is identical to the kelvin, the SI base unit). Expressed as a proper SI unit, a quantity of kelvin second is four orders of magnitude higher than the corresponding degree day (1 Celsius degree-day is 8.64×10 4 K·s; 1 Fahrenheit degree-day is 4.8×10 4 K·s).
San Diego's annual snowfall is 0 inches per year while the nation usually sees an average of 24.2 inches (610 mm) per year. The United States average for days above 90 °F (32 °C) is 37.9 days while San Diego's is only 2.5 days, and there are, on average 0 days below 32 °F (0 °C) in San Diego, while the national average is 88 days.
The third letter indicates the degree of summer heat—a indicates warmest month average temperature above 22 °C (71.6 °F) while b indicates warmest month averaging below 22 °C but with at least four months averaging above 10 °C (50.0 °F), and c indicates one to three months averaging above 10 °C (50.0 °F). [9] [11] [1]
The wettest month recorded at a Florida climate station was during May 1891 when Gainesville, Florida received 30.90 inches (785 mm). [23] The wettest year on record for a Florida climate station was during 1879 when 127.24 inches (3,232 mm) fell at Pensacola, Florida . [ 24 ]