Archived Clear Sky Chart Images
for Hawkeye 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.

May
Mon	Tue	Wed	Thu	Fri	Sat	Sun
					17 12:00	18 00:00 +1 chart from previous days
19 +2 charts from previous days	20 +2 charts from previous days	21 +2 charts from previous days	22 +2 charts from previous days	23 +2 charts from previous days	24 +2 charts from previous days	25 +1 chart 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.