Archived Clear Sky Chart Images
for Lily Lake Observatory, (IL)

A Sponsored Feature

Each day lists the local time, hh:mm in 24h time, that is the starting hour of a past clear sky chart. Each clear sky chart forecasts a few days into the future. There are at least two clear sky chart updates per day. So there are multiple overlapping forecasts for each day.

April
Mon	Tue	Wed	Thu	Fri	Sat	Sun
			11 11:00	12 00:00 12:00 23:00 +1 chart from previous days	13 11:00 +4 charts from previous days	14 00:00 17:00 23:00 +5 charts from previous days
15 11:00 23:00 +8 charts from previous days	16 11:00 23:00 +10 charts from previous days	17 17:00 23:00 +12 charts from previous days	18 11:00 +14 charts from previous days	19 05:00 11:00 23:00 +14 charts from previous days	20 17:00 23:00 +15 charts from previous days	21 00:00 11:00 23:00 +15 charts from previous days
22 12:00 23:00 +16 charts from previous days	23 17:00 23:00 +16 charts from previous days	24 +16 charts from previous days

Instead of the last few past clear sky chart images, some people prefer long-term averages of forecasts. See the Forecast History/Climate page.