Cloud cover [%]: 90 80 70 60 50 40 30 20 10 0 Transparency: Poor Below Average Average Above average Transparent Seeing: Bad Poor Average Good Excellent Darkness: -4 -3 -2 -1 0 1.0 2.0 3.0 3.5 4.0 4.5 5.0 5.2 5.4 5.6 5.8 6.0 Wind [km/h]: >72 46..72 28..45 19..27 9..18 0..8 Humidity [%]: <29 30..35 35..40 40..45 45..50 50..55 55..60 60..70 65..70 70..75 75..80 80..85 85..90 90..95 95..100 Temperature: <-35 -35..-30 -30..-25 -25..-20 -20..-15 -15..-10 -10..-5 -5..0 0..5 5..10 10..15 15..20 20..25 25..30 30..35 35..40 >40 Links: Satellites RASC Sky & Telescope mag Astronomy mag Skynews.ca This Week NYAA events RASC group thread util Focuser replacer Just a thread Starrynights group Rasctoronto group Pocket Sky Atlas PDFs errata

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