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18 days as of 9/2/2010
Two: the spring and autumn equinoxes.
90/365 years or about a quarter of a year.
In a normal year there are 90 days in January to March. In a leap year there are 91 days.
A 90 degree angle is a right angle
18 days as of 9/2/2010
Two: the spring and autumn equinoxes.
5
18
For 2011, according to the almanac section of Weatherunderground.com, there were 6 90 degree or better days in May, 24 in June, 27 in July, 29 (all but 2!) in August and 4 in September for a grand total of 90. There were 89 90 degree days at Peachtree-Dekalb airport.
One million
90% of sunshine/year = 328.5 days/year
90/365 years or about a quarter of a year.
There have not been any days that were over 90 degrees during July this year. On average, there are about 17 days in July where the temperature is over 90 degrees in Philadelphia.
89 days in a normal year and 90 days in a leap year.
In a normal year there are 90 days in January to March. In a leap year there are 91 days.
There are typically 260 weekdays in a year when excluding Saturdays and Sundays.