Archived Clear Sky Chart Images
for Edward Knight Observatory, (MA)

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.

January
Mon	Tue	Wed	Thu	Fri	Sat	Sun
12 12:00	13 00:00 12:00 +1 chart from previous days	14 00:00 12:00 +3 charts from previous days	15 00:00 16:00 +5 charts from previous days	16 04:00 16:00 +7 charts from previous days	17 00:00 12:00 +9 charts from previous days	18 00:00 12:00 +11 charts from previous days
19 00:00 12:00 +13 charts from previous days	20 00:00 16:00 +14 charts from previous days	21 04:00 12:00 +14 charts from previous days	22 04:00 12:00 +14 charts from previous days	23 00:00 16:00 +14 charts from previous days	24 00:00 14:00 +14 charts from previous days	25 00:00 14:00 +14 charts from previous days
26 04:00 12:00 +14 charts from previous days	27 04:00 16:00 +14 charts from previous days	28 04:00 12:00 +14 charts from previous days	29 04:00 12:00 +14 charts from previous days	30 04:00 16:00 +14 charts from previous days	31 04:00 16:00 +14 charts from previous days
February
Mon	Tue	Wed	Thu	Fri	Sat	Sun
						1 00:00 12:00 +14 charts from previous days
2 04:00 12:00 +14 charts from previous days	3 04:00 12:00 +14 charts from previous days	4 04:00 12:00 +14 charts from previous days	5 04:00 12:00 +14 charts from previous days	6 04:00 16:00 +14 charts from previous days	7 04:00 12:00 +14 charts from previous days	8 04:00 12:00 23:00 +14 charts from previous days
9 12:00 +15 charts from previous days	10 00:00 12:00 +14 charts from previous days	11 00:00 +14 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.