Clear Sky Chart

Astronomy-Weather Map
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ColorMeaning
>113F
104F to 113F
95F to 104F
86F to 95F
77F to 86F
68F to 77F
59F to 68F
50F to 59F
41F to 50F
32F to 41F
23F to 32F
14F to 23F
5F to 14F
-3F to 5F
-12F to -3F
-21F to -12F
-30F to -21F
-40F to -31F
< -40F

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Map provided by the Canadian Meteorological Center and is Crown copyright, product of Environment Canada.
Allan Rahill, of CMC, developed the forecast.

Cursor shows location of the Monmouth Clear Sky Chart.
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Previous ForecastTime
14h UT
Cloud Cover
Transparency
Seeing
Wind
Humidity
Temperature
This Forecast Time
15h UT
Cloud Cover
Transparency
Seeing
Wind
Humidity
Temperature
Next Forecast Time
16h UT
Cloud Cover
Transparency
Seeing
Wind
Humidity
Temperature
Use these maps to check if you are observing at a place where the forecast changes slowly with distance -- that's where clear sky chart accuracy is best.

The observation of fine detail seen in telescopes on planets or the moon requires good seeing. Visiblity of galaxies nebulae in telescopes, or the milky way with the un-aided eye, requires good transparency. All astronomical observations require a low percentage of cloud cover or clear skies.

Humidity, Wind, and Temperature won't determine if you can observe, but they might affect how comfortable you are.


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Copyright 2018 A.Danko

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