Here's a widget you can use to calculate the angle of the sun in your location at a given date and time.
https://www.esrl.noaa.gov/gmd/...
Select a city at your latitude (or enter the numbers yourself), set the date, specify midday as the time (unless you want something else), and look at the angle (in degrees) specified under solar elevation. That is how high the sun will be in the sky. Intensity is a function of solar elevation and cloud cover, basically.
