20-year average heating degree days for the UK
As at December 2006 Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
1 Thames Valley 307 271 237 174 94 40 17 17 43 114 221 295
2 South Eastern 334 297 263 201 118 59 28 29 64 140 247 320
3 Southern 317 282 260 207 120 63 32 35 64 131 230 305
4 South Western 272 249 236 189 112 56 23 21 45 104 188 253
5 Severn Valley 297 261 235 180 98 42 17 16 42 119 210 286
6 Midland 346 301 273 214 132 66 33 33 69 160 258 333
7 West Pennines 334 291 269 205 126 66 33 34 69 152 248 328
8 North Western 345 303 291 228 148 83 44 46 88 173 261 347
9 Borders 335 295 291 243 179 102 55 51 90 167 254 324
10 North Eastern 351 299 284 222 149 78 40 42 81 167 267 343
11 East Pennines 344 296 271 210 133 68 34 33 68 153 258 334
12 East Anglia 348 307 278 213 131 67 33 31 62 143 258 337
13 West Scotland 346 306 296 230 155 88 50 55 96 186 269 347
14 East Scotland 358 313 300 241 176 95 56 56 98 184 276 355
15 N E Scotland 355 318 311 251 184 106 60 62 105 195 278 354
16 Wales 309 279 268 219 145 80 40 35 64 138 219 290
17 N. Ireland 331 296 281 223 149 81 44 48 87 170 254 321
18 N W Scotland 322 299 300 245 189 122 80 73 111 190 258 318