Is it Clear Outside
Instructions provided by John Mallett, you may wish to print / copy these first.
1: enter your postcode on the page and check it found your location.
2: scroll down to the date of interest
3: click the small triangle in the bottom right of the date box.
This will open up a detailed analysis of the day and night.
4: You can click the centre on midnight button at the top to get midnight in the centre.
5: The amber on the top indicates possible seeing weather, green indicates most likely good seeing.
6: cursor over either the moon information or the two lines indicating day/night give you a detail popup.