Total Cloud Cover Average Cloud Amount (%) November (1954 - 1997) , Ship Observations Only Global Average: 68.5 Zonal Averages 17 zones Lat.N Average 85 63.9 75 69.8 65 82.8 55 79.6 45 76.9 35 68.7 25 57.3 15 56.4 5 65.5 -5 59.0 -15 62.0 -25 64.7 -35 69.9 -45 78.4 -55 85.8 -65 86.7 -75 74.3 Grid Box Averages 388 filled boxes Box # Lat.N Lon.E Average 1 85 60 65.5 2 85 180 63.3 3 85 300 62.4 4 75 20 84.9 5 75 60 87.3 6 75 100 59.4 7 75 140 63.5 8 75 180 61.1 9 75 220 55.3 10 75 260 62.9 11 75 300 65.9 12 75 340 81.6 13 65 10 79.4 14 65 30 85.0 15 65 50 84.4 20 65 150 81.6 21 65 170 77.9 22 65 190 89.0 23 65 210 72.5 27 65 290 87.8 28 65 310 75.9 29 65 330 83.2 30 65 350 81.5 31 55 10 75.5 32 55 30 79.1 37 55 130 72.2 38 55 150 74.7 39 55 170 77.4 40 55 190 81.3 41 55 210 80.5 42 55 230 80.8 44 55 270 78.0 45 55 290 76.3 46 55 310 84.4 47 55 330 82.4 48 55 350 77.5 49 45 5 56.6 50 45 15 58.8 51 45 25 66.2 52 45 35 66.0 53 45 45 62.3 54 45 55 64.3 61 45 125 54.5 62 45 135 51.1 63 45 145 70.2 64 45 155 80.2 65 45 165 80.5 66 45 175 79.9 67 45 185 79.4 68 45 195 79.2 69 45 205 80.0 70 45 215 80.8 71 45 225 80.8 72 45 235 74.2 77 45 285 64.5 78 45 295 73.1 79 45 305 80.0 80 45 315 81.5 81 45 325 79.3 82 45 335 78.8 83 45 345 76.5 84 45 355 72.3 85 35 5 56.4 86 35 15 55.8 87 35 25 51.0 88 35 35 45.4 89 35 45 61.0 90 35 55 58.4 96 35 115 45.9 97 35 125 58.2 98 35 135 63.6 99 35 145 70.5 100 35 155 76.8 101 35 165 75.8 102 35 175 75.3 103 35 185 76.4 104 35 195 78.1 105 35 205 76.9 106 35 215 75.1 107 35 225 73.2 108 35 235 61.7 109 35 245 46.2 112 35 275 54.2 113 35 285 62.7 114 35 295 70.9 115 35 305 68.3 116 35 315 68.0 117 35 325 68.5 118 35 335 69.3 119 35 345 64.9 120 35 355 53.0 124 25 35 23.1 125 25 45 35.5 126 25 55 19.2 127 25 65 16.0 128 25 75 27.1 129 25 85 39.2 130 25 95 34.9 131 25 105 64.5 132 25 115 70.3 133 25 125 72.8 134 25 135 65.5 135 25 145 59.4 136 25 155 57.2 137 25 165 55.8 138 25 175 58.6 139 25 185 60.3 140 25 195 59.5 141 25 205 59.5 142 25 215 64.3 143 25 225 70.1 144 25 235 68.7 145 25 245 44.8 146 25 255 41.6 147 25 265 56.9 148 25 275 55.6 149 25 285 56.4 150 25 295 55.3 151 25 305 56.8 152 25 315 57.9 153 25 325 57.6 154 25 335 54.5 155 25 345 41.4 160 15 35 26.5 161 15 45 20.9 162 15 55 32.4 163 15 65 36.5 164 15 75 42.7 165 15 85 59.6 166 15 95 55.3 167 15 105 67.9 168 15 115 65.8 169 15 125 64.3 170 15 135 59.4 171 15 145 55.4 172 15 155 55.7 173 15 165 54.6 174 15 175 57.5 175 15 185 60.3 176 15 195 61.0 177 15 205 59.7 178 15 215 65.8 179 15 225 72.9 180 15 235 74.5 181 15 245 61.6 182 15 255 43.8 183 15 265 40.8 184 15 275 57.3 185 15 285 55.1 186 15 295 51.0 187 15 305 54.6 188 15 315 57.8 189 15 325 60.9 190 15 335 55.6 191 15 345 39.7 193 5 5 66.4 197 5 45 41.6 198 5 55 46.9 199 5 65 52.2 200 5 75 62.4 201 5 85 68.8 202 5 95 75.0 203 5 105 73.3 204 5 115 72.6 205 5 125 63.4 206 5 135 63.7 207 5 145 64.3 208 5 155 65.5 209 5 165 65.7 210 5 175 66.5 211 5 185 65.8 212 5 195 64.7 213 5 205 64.8 214 5 215 67.4 215 5 225 67.4 216 5 235 69.6 217 5 245 71.6 218 5 255 70.5 219 5 265 71.0 220 5 275 74.6 221 5 285 76.4 223 5 305 58.2 224 5 315 57.6 225 5 325 62.4 226 5 335 70.1 227 5 345 61.9 228 5 355 64.3 229 -5 5 76.5 230 -5 15 69.2 232 -5 35 44.9 233 -5 45 42.5 234 -5 55 52.6 235 -5 65 59.2 236 -5 75 63.8 237 -5 85 68.5 238 -5 95 74.5 239 -5 105 75.8 240 -5 115 62.9 241 -5 125 53.2 242 -5 135 54.8 243 -5 145 65.1 244 -5 155 66.1 245 -5 165 67.7 246 -5 175 63.5 247 -5 185 60.7 248 -5 195 54.0 249 -5 205 46.5 250 -5 215 42.8 251 -5 225 40.0 252 -5 235 39.9 253 -5 245 45.0 254 -5 255 58.8 255 -5 265 69.4 256 -5 275 75.8 257 -5 285 73.8 260 -5 315 45.5 261 -5 325 46.2 262 -5 335 51.5 263 -5 345 65.6 264 -5 355 74.5 265 -15 5 85.2 266 -15 15 66.1 268 -15 35 45.3 269 -15 45 41.1 270 -15 55 51.5 271 -15 65 55.8 272 -15 75 62.1 273 -15 85 64.8 274 -15 95 63.9 275 -15 105 58.9 276 -15 115 34.0 277 -15 125 37.4 278 -15 135 44.3 279 -15 145 49.5 280 -15 155 52.4 281 -15 165 62.6 282 -15 175 65.4 283 -15 185 65.9 284 -15 195 67.6 285 -15 205 63.9 286 -15 215 60.7 287 -15 225 52.8 288 -15 235 51.0 289 -15 245 55.7 290 -15 255 67.1 291 -15 265 75.0 292 -15 275 86.5 293 -15 285 80.9 297 -15 325 59.1 298 -15 335 59.0 299 -15 345 74.0 300 -15 355 86.5 301 -25 5 74.4 302 -25 15 56.5 304 -25 35 58.5 305 -25 45 57.0 306 -25 55 54.4 307 -25 65 56.6 308 -25 75 58.9 309 -25 85 60.8 310 -25 95 64.5 311 -25 105 65.3 312 -25 115 39.8 315 -25 145 44.4 316 -25 155 50.6 317 -25 165 57.1 318 -25 175 63.2 319 -25 185 65.7 320 -25 195 69.3 321 -25 205 70.6 322 -25 215 72.9 323 -25 225 69.8 324 -25 235 62.3 325 -25 245 60.1 326 -25 255 60.9 327 -25 265 68.8 328 -25 275 80.0 329 -25 285 78.2 332 -25 315 65.0 333 -25 325 67.9 334 -25 335 66.0 335 -25 345 66.3 336 -25 355 74.2 337 -35 5 73.3 338 -35 15 52.4 339 -35 25 59.2 340 -35 35 67.0 341 -35 45 66.7 342 -35 55 67.9 343 -35 65 71.5 344 -35 75 72.0 345 -35 85 71.4 346 -35 95 72.7 347 -35 105 72.7 348 -35 115 61.1 349 -35 125 68.7 350 -35 135 67.6 351 -35 145 62.0 352 -35 155 62.7 353 -35 165 69.8 354 -35 175 64.8 355 -35 185 66.8 356 -35 195 71.1 357 -35 205 74.2 358 -35 215 75.4 359 -35 225 73.2 360 -35 235 74.1 361 -35 245 76.7 362 -35 255 74.6 363 -35 265 76.9 364 -35 275 79.1 365 -35 285 68.7 366 -35 295 49.2 367 -35 305 55.9 368 -35 315 64.3 369 -35 325 70.3 370 -35 335 72.2 371 -35 345 73.6 372 -35 355 72.9 373 -45 5 82.0 374 -45 15 79.5 375 -45 25 81.5 376 -45 35 81.9 377 -45 45 77.4 378 -45 55 83.4 379 -45 65 83.9 380 -45 75 81.2 381 -45 85 82.7 382 -45 95 80.2 383 -45 105 78.2 384 -45 115 78.5 385 -45 125 76.0 386 -45 135 79.0 387 -45 145 67.9 388 -45 155 75.9 389 -45 165 77.6 390 -45 175 66.8 391 -45 185 74.6 392 -45 195 77.6 393 -45 205 80.8 394 -45 215 81.3 395 -45 225 82.9 396 -45 235 78.3 397 -45 245 81.5 398 -45 255 90.7 399 -45 265 81.8 400 -45 275 77.7 401 -45 285 79.0 402 -45 295 53.6 403 -45 305 57.7 404 -45 315 72.6 405 -45 325 79.4 406 -45 335 81.3 407 -45 345 80.1 408 -45 355 83.7 409 -55 10 87.4 410 -55 30 89.9 411 -55 50 89.1 412 -55 70 88.0 413 -55 90 90.3 414 -55 110 86.3 415 -55 130 86.8 416 -55 150 89.2 417 -55 170 85.8 418 -55 190 75.6 419 -55 210 84.1 420 -55 230 91.8 421 -55 250 84.8 422 -55 270 84.0 423 -55 290 75.0 424 -55 310 80.4 425 -55 330 82.0 426 -55 350 91.2 427 -65 10 87.6 429 -65 50 79.0 430 -65 70 79.2 431 -65 90 87.5 432 -65 110 84.5 433 -65 130 87.8 434 -65 150 90.3 435 -65 170 90.6 436 -65 190 89.8 441 -65 290 83.8 442 -65 310 89.2 443 -65 330 92.5 444 -65 350 81.7 449 -75 180 74.6 453 -75 340 73.9