High Level (Cirriform) Average Cloud Amount (%) November (1954 - 1997) Day, Ship Observations Only Global Average: 13.7 Zonal Averages 17 zones Lat.N Average 85 23.4 75 19.8 65 13.7 55 13.3 45 12.7 35 12.9 25 9.8 15 13.2 5 16.2 -5 13.5 -15 11.0 -25 11.7 -35 12.8 -45 13.7 -55 15.8 -65 18.4 -75 20.3 Grid Box Averages 343 filled boxes Box # Lat.N Lon.E Average 2 85 180 23.4 4 75 20 9.7 5 75 60 10.8 7 75 140 33.4 8 75 180 25.1 9 75 220 27.4 11 75 300 19.8 12 75 340 9.2 13 65 10 11.5 14 65 30 8.2 15 65 50 10.8 21 65 170 10.3 22 65 190 11.3 23 65 210 12.1 27 65 290 23.8 28 65 310 14.1 29 65 330 13.7 30 65 350 13.0 31 55 10 14.1 32 55 30 11.9 38 55 150 10.6 39 55 170 12.5 40 55 190 11.1 41 55 210 13.4 42 55 230 14.7 45 55 290 17.8 46 55 310 13.9 47 55 330 14.8 48 55 350 15.5 49 45 5 15.4 50 45 15 15.4 51 45 25 15.3 52 45 35 11.1 53 45 45 9.8 54 45 55 11.5 62 45 135 8.9 63 45 145 9.4 64 45 155 10.8 65 45 165 9.8 66 45 175 9.6 67 45 185 10.7 68 45 195 10.9 69 45 205 11.7 70 45 215 14.0 71 45 225 15.9 72 45 235 16.4 77 45 285 15.4 78 45 295 14.9 79 45 305 14.9 80 45 315 16.5 81 45 325 14.3 82 45 335 13.3 83 45 345 13.1 84 45 355 14.1 85 35 5 14.3 86 35 15 12.7 87 35 25 11.0 88 35 35 11.8 90 35 55 9.4 96 35 115 10.9 97 35 125 8.4 98 35 135 11.0 99 35 145 10.9 100 35 155 11.2 101 35 165 14.5 102 35 175 11.8 103 35 185 12.1 104 35 195 14.6 105 35 205 14.9 106 35 215 13.9 107 35 225 15.1 108 35 235 13.0 109 35 245 13.8 112 35 275 14.6 113 35 285 12.7 114 35 295 13.4 115 35 305 12.9 116 35 315 14.4 117 35 325 13.7 118 35 335 14.0 119 35 345 12.1 120 35 355 13.1 124 25 35 7.5 125 25 45 15.1 126 25 55 7.6 127 25 65 5.3 128 25 75 8.9 129 25 85 10.7 132 25 115 9.3 133 25 125 8.8 134 25 135 7.9 135 25 145 7.9 136 25 155 7.5 137 25 165 7.3 138 25 175 7.6 139 25 185 9.3 140 25 195 10.5 141 25 205 11.0 142 25 215 10.7 143 25 225 11.7 144 25 235 10.4 145 25 245 11.4 146 25 255 12.2 147 25 265 11.4 148 25 275 10.0 149 25 285 10.3 150 25 295 9.9 151 25 305 10.1 152 25 315 10.9 153 25 325 11.2 154 25 335 11.9 155 25 345 13.3 160 15 35 5.8 161 15 45 4.8 162 15 55 6.2 163 15 65 9.6 164 15 75 15.9 165 15 85 15.8 166 15 95 18.0 167 15 105 15.9 168 15 115 14.7 169 15 125 14.4 170 15 135 13.8 171 15 145 10.7 172 15 155 11.4 173 15 165 9.6 174 15 175 11.3 175 15 185 13.6 176 15 195 14.0 177 15 205 13.4 178 15 215 13.0 179 15 225 17.0 180 15 235 15.0 181 15 245 13.0 182 15 255 12.9 183 15 265 12.8 184 15 275 14.1 185 15 285 15.0 186 15 295 11.0 187 15 305 10.2 188 15 315 11.6 189 15 325 16.1 190 15 335 17.2 191 15 345 19.8 193 5 5 14.5 197 5 45 5.7 198 5 55 6.8 199 5 65 13.0 200 5 75 17.7 201 5 85 19.5 202 5 95 25.6 203 5 105 25.6 204 5 115 25.0 205 5 125 22.9 206 5 135 24.7 207 5 145 18.5 208 5 155 20.7 209 5 165 20.0 210 5 175 21.3 211 5 185 20.6 212 5 195 15.1 213 5 205 15.4 214 5 215 13.9 215 5 225 11.7 216 5 235 8.7 217 5 245 9.6 218 5 255 11.0 219 5 265 9.3 220 5 275 15.6 221 5 285 23.7 223 5 305 15.4 224 5 315 12.6 225 5 325 13.2 226 5 335 16.3 227 5 345 16.1 228 5 355 12.2 229 -5 5 10.2 230 -5 15 12.0 232 -5 35 14.6 233 -5 45 7.0 234 -5 55 10.6 235 -5 65 13.9 236 -5 75 17.0 237 -5 85 21.6 238 -5 95 23.0 239 -5 105 31.3 240 -5 115 27.1 241 -5 125 22.6 242 -5 135 19.8 243 -5 145 23.6 244 -5 155 25.5 245 -5 165 22.3 246 -5 175 20.7 247 -5 185 21.1 248 -5 195 15.9 249 -5 205 14.5 250 -5 215 9.8 251 -5 225 3.3 252 -5 235 3.2 253 -5 245 2.8 254 -5 255 2.5 255 -5 265 3.7 256 -5 275 11.4 257 -5 285 17.3 260 -5 315 12.0 261 -5 325 9.1 262 -5 335 7.7 263 -5 345 5.2 264 -5 355 5.1 265 -15 5 4.6 266 -15 15 7.7 268 -15 35 10.5 269 -15 45 9.7 270 -15 55 9.2 271 -15 65 11.9 272 -15 75 12.1 273 -15 85 12.7 274 -15 95 13.7 275 -15 105 12.0 276 -15 115 8.8 277 -15 125 12.3 278 -15 135 17.4 279 -15 145 13.2 280 -15 155 11.7 281 -15 165 14.4 282 -15 175 13.8 283 -15 185 17.0 284 -15 195 18.6 285 -15 205 16.8 286 -15 215 13.1 287 -15 225 8.5 288 -15 235 7.9 289 -15 245 6.6 290 -15 255 5.2 291 -15 265 6.8 292 -15 275 8.2 293 -15 285 15.2 297 -15 325 13.4 298 -15 335 9.4 299 -15 345 8.5 300 -15 355 5.5 301 -25 5 5.4 302 -25 15 6.1 304 -25 35 11.6 305 -25 45 11.0 306 -25 55 10.0 307 -25 65 9.3 308 -25 75 6.6 309 -25 85 8.1 310 -25 95 6.6 311 -25 105 6.8 312 -25 115 6.1 315 -25 145 6.3 316 -25 155 9.0 317 -25 165 10.3 318 -25 175 12.4 319 -25 185 14.7 320 -25 195 16.8 321 -25 205 17.3 322 -25 215 19.8 323 -25 225 19.3 324 -25 235 18.0 325 -25 245 12.6 326 -25 255 11.9 327 -25 265 10.5 328 -25 275 6.0 329 -25 285 7.5 332 -25 315 16.8 333 -25 325 17.6 334 -25 335 14.8 335 -25 345 12.2 336 -25 355 10.5 337 -35 5 13.8 338 -35 15 9.1 339 -35 25 10.7 340 -35 35 10.9 341 -35 45 9.1 342 -35 55 11.8 343 -35 65 13.8 344 -35 75 14.3 345 -35 85 10.3 346 -35 95 9.5 347 -35 105 9.5 348 -35 115 11.1 349 -35 125 12.5 350 -35 135 14.0 351 -35 145 14.0 352 -35 155 11.9 353 -35 165 12.7 354 -35 175 12.5 355 -35 185 13.5 356 -35 195 12.4 357 -35 205 15.0 358 -35 215 14.7 359 -35 225 19.4 360 -35 235 21.6 364 -35 275 8.3 365 -35 285 8.3 366 -35 295 16.5 367 -35 305 13.6 368 -35 315 11.8 369 -35 325 13.0 370 -35 335 15.7 371 -35 345 15.6 372 -35 355 15.7 377 -45 45 9.4 378 -45 55 14.6 379 -45 65 12.1 380 -45 75 8.7 383 -45 105 8.8 384 -45 115 10.7 385 -45 125 10.0 386 -45 135 26.6 387 -45 145 20.1 388 -45 155 16.0 389 -45 165 13.4 390 -45 175 14.3 391 -45 185 14.7 392 -45 195 16.6 393 -45 205 10.7 394 -45 215 16.1 400 -45 275 9.0 401 -45 285 8.1 402 -45 295 16.8 403 -45 305 17.9 404 -45 315 16.5 405 -45 325 10.7 411 -55 50 14.6 412 -55 70 19.6 414 -55 110 16.4 416 -55 150 19.7 417 -55 170 11.6 422 -55 270 13.3 423 -55 290 19.7 424 -55 310 17.1 425 -55 330 11.1 429 -65 50 20.4 430 -65 70 14.1 432 -65 110 14.3 435 -65 170 20.5 441 -65 290 21.4 442 -65 310 18.3 449 -75 180 20.3