Total Cloud Cover Average Cloud Amount (%) November (1954 - 1997) Night, Ship Observations Only Global Average: 69.0 Zonal Averages 17 zones Lat.N Average 85 63.0 75 71.1 65 81.8 55 79.0 45 76.3 35 68.4 25 57.3 15 55.9 5 65.6 -5 59.9 -15 63.1 -25 66.7 -35 71.2 -45 78.2 -55 87.4 -65 87.2 -75 74.2 Grid Box Averages 355 filled boxes Box # Lat.N Lon.E Average 1 85 60 63.8 2 85 180 62.2 4 75 20 83.3 5 75 60 85.4 8 75 180 62.1 9 75 220 54.2 11 75 300 60.6 12 75 340 81.9 13 65 10 78.5 14 65 30 84.5 15 65 50 82.5 21 65 170 78.4 22 65 190 88.0 23 65 210 71.9 27 65 290 86.8 28 65 310 74.1 29 65 330 82.5 30 65 350 80.3 31 55 10 74.2 32 55 30 75.9 38 55 150 73.0 39 55 170 77.1 40 55 190 81.0 41 55 210 79.8 42 55 230 79.5 46 55 310 84.2 47 55 330 82.0 48 55 350 76.3 49 45 5 55.7 50 45 15 56.9 51 45 25 65.7 52 45 35 64.9 53 45 45 60.6 54 45 55 49.0 62 45 135 47.9 63 45 145 68.7 64 45 155 80.3 65 45 165 80.2 66 45 175 79.9 67 45 185 79.7 68 45 195 78.2 69 45 205 79.0 70 45 215 80.2 71 45 225 80.2 72 45 235 72.4 77 45 285 61.9 78 45 295 71.9 79 45 305 79.7 80 45 315 81.5 81 45 325 79.2 82 45 335 78.4 83 45 345 75.8 84 45 355 71.4 85 35 5 55.7 86 35 15 54.1 87 35 25 49.0 88 35 35 43.6 97 35 125 56.8 98 35 135 61.8 99 35 145 70.1 100 35 155 77.1 101 35 165 76.1 102 35 175 75.2 103 35 185 77.1 104 35 195 78.6 105 35 205 77.3 106 35 215 74.8 107 35 225 73.1 108 35 235 61.2 109 35 245 44.9 112 35 275 54.5 113 35 285 61.5 114 35 295 70.3 115 35 305 67.6 116 35 315 67.1 117 35 325 68.3 118 35 335 69.1 119 35 345 65.1 120 35 355 51.9 124 25 35 20.4 125 25 45 34.8 126 25 55 18.1 127 25 65 13.7 129 25 85 41.4 132 25 115 70.1 133 25 125 74.0 134 25 135 66.1 135 25 145 60.0 136 25 155 57.3 137 25 165 55.3 138 25 175 58.7 139 25 185 61.2 140 25 195 59.1 141 25 205 58.5 142 25 215 64.0 143 25 225 71.0 144 25 235 69.1 145 25 245 44.6 146 25 255 40.9 147 25 265 56.0 148 25 275 55.5 149 25 285 56.0 150 25 295 54.8 151 25 305 56.6 152 25 315 58.1 153 25 325 57.4 154 25 335 54.1 155 25 345 40.0 160 15 35 21.4 161 15 45 19.9 162 15 55 31.7 163 15 65 35.1 164 15 75 40.4 165 15 85 57.7 166 15 95 53.9 167 15 105 67.3 168 15 115 65.6 169 15 125 63.6 170 15 135 58.2 171 15 145 55.3 172 15 155 56.4 173 15 165 54.7 174 15 175 56.7 175 15 185 59.7 176 15 195 61.4 177 15 205 58.6 178 15 215 66.5 179 15 225 74.1 180 15 235 76.5 181 15 245 60.5 182 15 255 42.3 183 15 265 40.4 184 15 275 58.0 185 15 285 54.1 186 15 295 49.8 187 15 305 53.8 188 15 315 58.1 189 15 325 61.2 190 15 335 55.0 191 15 345 36.7 193 5 5 66.8 197 5 45 41.5 198 5 55 46.3 199 5 65 50.8 200 5 75 62.2 201 5 85 68.7 202 5 95 76.1 203 5 105 72.0 204 5 115 71.2 205 5 125 63.2 206 5 135 62.8 207 5 145 64.3 208 5 155 65.0 209 5 165 66.0 210 5 175 65.9 211 5 185 67.0 212 5 195 65.2 213 5 205 64.8 214 5 215 67.3 215 5 225 68.8 216 5 235 71.4 217 5 245 73.3 218 5 255 72.4 219 5 265 72.9 220 5 275 75.9 221 5 285 75.4 223 5 305 55.9 224 5 315 56.5 225 5 325 63.6 226 5 335 70.2 227 5 345 60.7 228 5 355 65.0 229 -5 5 80.6 230 -5 15 62.1 233 -5 45 41.3 234 -5 55 52.0 235 -5 65 58.3 236 -5 75 63.5 237 -5 85 68.5 238 -5 95 74.7 239 -5 105 75.5 240 -5 115 61.6 241 -5 125 52.2 242 -5 135 53.0 243 -5 145 64.2 244 -5 155 65.5 245 -5 165 67.6 246 -5 175 62.5 247 -5 185 60.3 248 -5 195 52.9 249 -5 205 44.5 250 -5 215 42.5 251 -5 225 39.5 252 -5 235 40.1 253 -5 245 45.8 254 -5 255 64.7 255 -5 265 76.7 256 -5 275 81.5 257 -5 285 71.2 260 -5 315 41.4 261 -5 325 46.0 262 -5 335 52.5 263 -5 345 71.2 264 -5 355 80.7 265 -15 5 91.0 266 -15 15 63.4 268 -15 35 44.5 269 -15 45 38.5 270 -15 55 51.7 271 -15 65 56.6 272 -15 75 63.5 273 -15 85 66.1 274 -15 95 65.0 275 -15 105 58.3 276 -15 115 31.9 277 -15 125 33.8 278 -15 135 39.4 279 -15 145 50.8 280 -15 155 51.9 281 -15 165 63.1 282 -15 175 64.9 283 -15 185 65.0 284 -15 195 68.8 285 -15 205 63.0 286 -15 215 61.0 287 -15 225 52.1 288 -15 235 50.7 289 -15 245 57.0 290 -15 255 72.4 291 -15 265 80.6 292 -15 275 90.7 293 -15 285 79.6 297 -15 325 59.0 298 -15 335 62.5 299 -15 345 79.3 300 -15 355 91.1 301 -25 5 81.6 302 -25 15 54.0 304 -25 35 59.3 305 -25 45 58.0 306 -25 55 54.6 307 -25 65 58.0 308 -25 75 62.1 309 -25 85 65.4 310 -25 95 69.3 311 -25 105 66.0 312 -25 115 39.3 316 -25 155 51.4 317 -25 165 59.4 318 -25 175 64.8 319 -25 185 66.7 320 -25 195 70.3 321 -25 205 72.0 322 -25 215 74.8 323 -25 225 70.8 324 -25 235 63.0 325 -25 245 60.2 326 -25 255 65.7 327 -25 265 71.4 328 -25 275 85.1 329 -25 285 78.1 332 -25 315 66.4 333 -25 325 68.4 334 -25 335 66.9 335 -25 345 70.5 336 -25 355 78.8 337 -35 5 77.0 338 -35 15 51.9 339 -35 25 60.0 340 -35 35 69.7 341 -35 45 67.8 342 -35 55 69.1 343 -35 65 72.7 344 -35 75 74.5 345 -35 85 74.2 346 -35 95 76.0 347 -35 105 72.5 348 -35 115 61.0 349 -35 125 69.1 350 -35 135 67.8 351 -35 145 62.1 352 -35 155 64.4 353 -35 165 72.6 354 -35 175 66.9 355 -35 185 69.7 356 -35 195 71.7 357 -35 205 74.5 358 -35 215 75.6 359 -35 225 71.4 360 -35 235 76.3 361 -35 245 78.1 363 -35 265 81.0 364 -35 275 80.7 365 -35 285 66.9 367 -35 305 55.5 368 -35 315 64.8 369 -35 325 72.9 370 -35 335 73.5 371 -35 345 76.2 372 -35 355 75.6 374 -45 15 81.6 376 -45 35 84.3 377 -45 45 76.8 378 -45 55 82.2 379 -45 65 85.8 380 -45 75 82.6 381 -45 85 84.3 382 -45 95 83.5 383 -45 105 77.6 384 -45 115 79.3 386 -45 135 79.3 387 -45 145 66.5 388 -45 155 78.5 389 -45 165 79.0 390 -45 175 68.7 391 -45 185 76.9 392 -45 195 76.4 393 -45 205 81.1 400 -45 275 77.7 401 -45 285 78.2 402 -45 295 54.1 403 -45 305 56.2 404 -45 315 74.6 405 -45 325 77.0 406 -45 335 86.6 407 -45 345 83.5 408 -45 355 85.3 409 -55 10 89.5 410 -55 30 92.2 411 -55 50 90.3 412 -55 70 90.0 413 -55 90 91.6 414 -55 110 87.6 415 -55 130 85.5 416 -55 150 90.7 417 -55 170 87.3 419 -55 210 81.4 420 -55 230 92.9 421 -55 250 88.0 422 -55 270 85.3 423 -55 290 75.0 424 -55 310 80.8 425 -55 330 82.5 426 -55 350 93.1 429 -65 50 81.4 430 -65 70 79.5 431 -65 90 88.0 432 -65 110 84.3 433 -65 130 89.2 434 -65 150 91.6 435 -65 170 90.6 436 -65 190 90.4 441 -65 290 84.5 442 -65 310 90.1 449 -75 180 74.2