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	4	05:30	4.9	-3.1	24	18	163	0	0.0	0.0
2012	Feb	4	05:15	5.0	-4	24	21	179	0	0.0	0.0
2012	Feb	4	05:00	4.8	-3.9	24	20	147	0	0.0	0.0
2012	Feb	4	04:45	4.5	-4	23	19	165	0	0.0	0.0
2012	Feb	4	04:30	4.3	-4.6	24	20	187	0	0.0	0.0
2012	Feb	4	04:15	4.2	-5.1	24	21	174	0	0.0	0.0
2012	Feb	4	04:00	3.9	-4.3	23	18	184	0	0.0	0.0
2012	Feb	4	03:45	3.8	-5.6	23	21	169	0	0.0	0.0
2012	Feb	4	03:30	3.6	-5.5	23	20	188	0	0.0	0.0
2012	Feb	4	03:15	3.6	-6.2	23	22	180	0	0.0	0.0
2012	Feb	4	03:00	3.7	-5.4	24	20	181	0	0.0	0.0
2012	Feb	4	02:45	3.2	-4.8	23	17	175	0	0.0	0.0
2012	Feb	4	02:30	3.1	-6.2	22	20	165	0	0.0	0.0
2012	Feb	4	02:15	2.8	-5.8	21	18	175	0	0.0	0.0
2012	Feb	4	02:00	2.7	-6.3	22	19	166	0	0.0	0.0
2012	Feb	4	01:45	3.3	-5.5	22	19	194	0	0.0	0.0
2012	Feb	4	01:30	2.5	-6.1	21	18	187	0	0.0	0.0
2012	Feb	4	01:15	2.4	-5.3	22	16	179	0	0.0	0.0
2012	Feb	4	01:00	2.7	-5.9	21	18	186	0	0.0	0.0
2012	Feb	4	00:45	2.2	-5.6	22	16	194	0	0.0	0.0