| Blwyddyn | Mis | Dyddiad | Amser (G.M.T.) | Tymheredd (C) | Tymheredd (inc. Wind chill effect) | Buanedd Hyrddwynt (MYA) | Buanedd Cyfartalog (MYA) | Cyfeiriad y Gwynt (Gradd Celsius) | Haul (Wat y metr sgwâr) | Glawiad (mm/awr) | Lleithder Cymharol (%) | 2012 | Feb | 7 | 04:45 | 4.1 | -2.7 | 21 | 15 | 201 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 04:30 | 4.0 | -2.9 | 21 | 15 | 184 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 04:15 | 3.9 | -4.3 | 22 | 18 | 191 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 04:00 | 3.8 | -4 | 22 | 17 | 186 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 03:45 | 3.8 | -3.6 | 21 | 16 | 183 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 03:30 | 3.5 | -4 | 21 | 16 | 182 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 03:15 | 2.2 | -5.1 | 19 | 15 | 206 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 03:00 | 1.8 | 0.5 | 19 | 7 | 182 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 02:45 | 2.8 | -1.2 | 18 | 10 | 156 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 02:30 | 2.9 | -2.5 | 19 | 12 | 203 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 02:15 | 4.1 | -2.7 | 19 | 15 | 199 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 02:00 | 4.4 | -1.8 | 19 | 14 | 188 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 01:45 | 4.7 | -0.3 | 17 | 12 | 168 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 01:30 | 4.6 | -3 | 21 | 17 | 174 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 01:15 | 4.5 | -2.2 | 20 | 15 | 161 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 01:00 | 4.5 | -1.7 | 20 | 14 | 137 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 00:45 | 4.3 | -2 | 18 | 14 | 179 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 00:30 | 3.5 | -3.5 | 21 | 15 | 173 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 00:15 | 1.5 | 0.1 | 18 | 7 | 111 | 0 | 0.0 | 0.0 | 2012 | Feb | 7 | 00:00 | 1.4 | 19.2 | 0 | 0 | 0 | 0 | 0.0 | 0.0 |