20-year average heating degree days for the UK

As at December 2007	Jan	Feb	Mar	Apr	May	Jun	Jul	Aug	Sep	Oct	Nov	Dec
1	Thames Valley	297	267	231	172	91	38	17	17	43	113	219	295
2	South Eastern	324	293	258	198	116	57	28	28	64	141	246	321
3	Southern	307	278	256	203	118	60	33	34	64	130	229	306

4	South Western	263	245	230	187	109	53	23	21	45	102	187	253
5	Severn Valley	289	258	231	180	97	41	18	17	43	118	210	288
6	Midland		335	298	268	213	129	63	33	33	69	157	256	334

7	West Pennines	325	287	264	206	125	64	34	35	69	150	247	330
8	North Western	336	301	286	226	145	81	45	46	88	170	259	348
9	Borders		328	292	287	240	176	99	55	50	89	164	252	327

10	North Eastern	342	296	279	220	146	76	40	43	80	165	265	345
11	East Pennines	335	293	266	207	131	65	34	32	66	149	256	335
12	East Anglia	337	303	272	212	128	65	33	31	62	143	258	338

13	West Scotland	338	302	291	227	154	85	51	54	96	181	267	347
14	East Scotland	352	309	296	239	175	93	56	56	97	180	274	356
15	N E Scotland	349	315	305	248	183	104	60	61	105	191	275	355

16	Wales		301	275	262	218	142	77	40	35	63	135	216	290
17	N. Ireland	327	294	278	221	147	78	45	47	85	165	251	321
18	N W Scotland	316	295	297	242	189	121	79	72	111	184	256	316