The figure below shows you a compact characterization of the hourly average temperatures for the quarter of the year centered on April. The horizontal axis is the day, the vertical axis is the hour of the day, and the color is the average temperature for that hour and day. A wet day is one with at least 0. To show variation within the month and not just the monthly total, we show the rainfall accumulated over a sliding day period centered around each day. From the start to the end of the month, the length of the day increases by 1 hour, 46 minutes , implying an average daily increase of 3 minutes, 40 seconds , and weekly increase of 25 minutes, 38 seconds.
The shortest day of the month is April 1 , with 12 hours, 57 minutes of daylight and the longest day is April 30 , with 14 hours, 43 minutes of daylight. For reference, on June 21 , the longest day of the year, the Sun rises at AM and sets 16 hours, 28 minutes later, at PM , while on December 21 , the shortest day of the year, it rises at AM and sets 7 hours, 59 minutes later, at PM.
The figure below presents a compact representation of the sun's elevation the angle of the sun above the horizon and azimuth its compass bearing for every hour of every day in the reporting period.
The horizontal axis is the day of the year and the vertical axis is the hour of the day. For a given day and hour of that day, the background color indicates the azimuth of the sun at that moment. The black isolines are contours of constant solar elevation. The figure below presents a compact representation of key lunar data for April The horizontal axis is the day, the vertical axis is the hour of the day, and the colored areas indicate when the moon is above the horizon.
The vertical gray bars new Moons and blue bars full Moons indicate key Moon phases. The label associated with each bar indicates the date and time that the phase is obtained, and the companion time labels indicate the rise and set times of the Moon for the nearest time interval in which the moon is above the horizon.
