> which is really the bigger factor in having a warmer climate: your angle to the sun (your latitude) or the duration of the day? This graph from wikipedia mig

> which is really the bigger factor in having a warmer climate: your angle to the sun (your latitude) or the duration of the day? This graph from wikipedia might be a good start. It is showing the trajectory of the sun on different days of the year at 56 degrees north latitude (e.g. Edinburgh, Scotland). https://commons.wikimedia.org/wiki/File:Solar_declination.svg https://commons.wikimedia.org/wiki/File:Solar_declination.sv... The horizontal axis is the azimuth of the sun, but it works as time as well. So that tells you the duration of the day. The vertical axis is the elevation angle of the sun. To turn this into a solar power factor, you would actually have to take the sine of the angle. But I don't think that would change the overall shape of the graph much. So you can think of the area under the curve as an approximate measure of energy delivered by the sun.