Total Cloud Cover Average Cloud Amount (%) February (1954 - 1997) Day, Ship Observations Only Global Average: 66.8 Zonal Averages 17 zones Lat.N Average 85 54.4 75 69.9 65 82.1 55 81.9 45 78.9 35 71.9 25 58.2 15 49.0 5 60.6 -5 59.5 -15 59.8 -25 60.0 -35 66.2 -45 77.8 -55 85.1 -65 87.4 -75 82.6 Grid Box Averages 386 filled boxes Box # Lat.N Lon.E Average 1 85 60 57.7 2 85 180 55.3 3 85 300 48.6 4 75 20 84.1 5 75 60 81.0 7 75 140 52.3 8 75 180 56.3 9 75 220 70.0 12 75 340 78.5 13 65 10 80.1 14 65 30 80.4 15 65 50 77.4 21 65 170 79.4 22 65 190 83.3 23 65 210 80.8 28 65 310 80.4 29 65 330 83.4 30 65 350 83.8 31 55 10 75.1 32 55 30 77.2 38 55 150 77.4 39 55 170 83.0 40 55 190 83.3 41 55 210 84.1 42 55 230 82.6 46 55 310 85.0 47 55 330 82.7 48 55 350 79.3 49 45 5 59.5 50 45 15 61.0 51 45 25 71.7 52 45 35 72.3 53 45 45 75.2 54 45 55 73.1 61 45 125 52.4 62 45 135 61.5 63 45 145 70.4 64 45 155 82.3 65 45 165 80.8 66 45 175 80.6 67 45 185 80.9 68 45 195 81.1 69 45 205 82.8 70 45 215 83.2 71 45 225 82.3 72 45 235 77.3 77 45 285 64.0 78 45 295 75.2 79 45 305 81.8 80 45 315 85.2 81 45 325 81.2 82 45 335 78.8 83 45 345 77.3 84 45 355 75.0 85 35 5 58.3 86 35 15 60.0 87 35 25 60.3 88 35 35 53.5 90 35 55 60.6 96 35 115 32.9 97 35 125 65.8 98 35 135 72.3 99 35 145 73.7 100 35 155 77.9 101 35 165 75.5 102 35 175 73.8 103 35 185 74.5 104 35 195 75.3 105 35 205 76.5 106 35 215 77.1 107 35 225 77.1 108 35 235 68.6 109 35 245 54.0 112 35 275 57.4 113 35 285 70.5 114 35 295 78.9 115 35 305 75.0 116 35 315 72.6 117 35 325 72.2 118 35 335 71.8 119 35 345 66.1 120 35 355 55.4 124 25 35 27.8 125 25 45 44.6 126 25 55 30.8 127 25 65 23.6 128 25 75 15.0 129 25 85 28.4 130 25 95 25.9 131 25 105 92.4 132 25 115 77.1 133 25 125 75.8 134 25 135 66.5 135 25 145 60.4 136 25 155 61.4 137 25 165 58.3 138 25 175 58.1 139 25 185 57.4 140 25 195 56.9 141 25 205 59.9 142 25 215 66.5 143 25 225 70.5 144 25 235 69.6 145 25 245 47.8 146 25 255 40.3 147 25 265 61.0 148 25 275 55.8 149 25 285 56.3 150 25 295 54.0 151 25 305 54.5 152 25 315 56.1 153 25 325 58.5 154 25 335 55.0 155 25 345 39.8 160 15 35 38.9 161 15 45 37.0 162 15 55 31.8 163 15 65 28.3 164 15 75 24.3 165 15 85 31.3 166 15 95 28.6 167 15 105 67.0 168 15 115 52.5 169 15 125 57.1 170 15 135 58.9 171 15 145 56.1 172 15 155 53.2 173 15 165 51.4 174 15 175 50.6 175 15 185 50.6 176 15 195 51.8 177 15 205 53.1 178 15 215 59.6 179 15 225 66.2 180 15 235 70.2 181 15 245 59.6 182 15 255 35.3 183 15 265 24.9 184 15 275 39.9 185 15 285 46.4 186 15 295 47.2 187 15 305 49.2 188 15 315 52.1 189 15 325 56.5 190 15 335 48.4 191 15 345 32.5 193 5 5 64.8 197 5 45 41.2 198 5 55 44.9 199 5 65 42.5 200 5 75 43.8 201 5 85 57.5 202 5 95 62.1 203 5 105 64.6 204 5 115 64.6 205 5 125 65.4 206 5 135 68.3 207 5 145 68.0 208 5 155 70.4 209 5 165 67.8 210 5 175 66.8 211 5 185 65.1 212 5 195 61.8 213 5 205 62.9 214 5 215 66.2 215 5 225 67.1 216 5 235 66.3 217 5 245 58.3 218 5 255 54.3 219 5 265 50.3 220 5 275 44.4 221 5 285 52.4 223 5 305 58.2 224 5 315 71.0 225 5 325 71.1 226 5 335 63.6 227 5 345 51.0 228 5 355 60.9 229 -5 5 61.8 230 -5 15 70.2 232 -5 35 49.6 233 -5 45 50.5 234 -5 55 56.2 235 -5 65 59.9 236 -5 75 65.4 237 -5 85 64.7 238 -5 95 70.2 239 -5 105 75.0 240 -5 115 75.2 241 -5 125 71.1 242 -5 135 76.2 243 -5 145 76.7 244 -5 155 73.4 245 -5 165 74.8 246 -5 175 70.4 247 -5 185 64.4 248 -5 195 58.3 249 -5 205 52.2 250 -5 215 47.6 251 -5 225 45.7 252 -5 235 43.8 253 -5 245 48.2 254 -5 255 52.4 255 -5 265 56.3 256 -5 275 54.9 257 -5 285 51.1 260 -5 315 72.1 261 -5 325 58.0 262 -5 335 52.6 263 -5 345 46.2 264 -5 355 49.3 265 -15 5 63.4 266 -15 15 67.3 268 -15 35 57.6 269 -15 45 65.3 270 -15 55 62.5 271 -15 65 60.4 272 -15 75 63.1 273 -15 85 60.8 274 -15 95 62.2 275 -15 105 62.6 276 -15 115 57.6 277 -15 125 70.0 278 -15 135 77.0 279 -15 145 71.4 280 -15 155 66.7 281 -15 165 66.9 282 -15 175 68.9 283 -15 185 70.8 284 -15 195 68.6 285 -15 205 65.1 286 -15 215 61.4 287 -15 225 54.3 288 -15 235 48.8 289 -15 245 48.9 290 -15 255 49.5 291 -15 265 52.2 292 -15 275 59.1 293 -15 285 58.1 297 -15 325 53.5 298 -15 335 45.9 299 -15 345 45.9 300 -15 355 52.4 301 -25 5 61.8 302 -25 15 62.2 304 -25 35 54.0 305 -25 45 54.5 306 -25 55 59.2 307 -25 65 60.0 308 -25 75 57.3 309 -25 85 58.8 310 -25 95 64.7 311 -25 105 66.8 312 -25 115 43.6 315 -25 145 66.2 316 -25 155 61.0 317 -25 165 61.1 318 -25 175 65.4 319 -25 185 68.2 320 -25 195 67.0 321 -25 205 69.2 322 -25 215 63.9 323 -25 225 60.2 324 -25 235 55.3 325 -25 245 52.3 326 -25 255 50.1 327 -25 265 56.5 328 -25 275 68.7 329 -25 285 74.5 332 -25 315 56.7 333 -25 325 56.0 334 -25 335 54.8 335 -25 345 50.2 336 -25 355 54.2 337 -35 5 63.5 338 -35 15 51.4 339 -35 25 56.0 340 -35 35 60.5 341 -35 45 64.0 342 -35 55 69.0 343 -35 65 68.6 344 -35 75 69.4 345 -35 85 69.1 346 -35 95 71.6 347 -35 105 74.5 348 -35 115 55.0 349 -35 125 69.7 350 -35 135 66.0 351 -35 145 54.9 352 -35 155 60.0 353 -35 165 65.2 354 -35 175 59.3 355 -35 185 65.5 356 -35 195 72.6 357 -35 205 72.3 358 -35 215 73.0 359 -35 225 74.5 360 -35 235 66.9 361 -35 245 63.4 362 -35 255 67.9 363 -35 265 71.3 364 -35 275 72.0 365 -35 285 68.8 367 -35 305 53.0 368 -35 315 62.6 369 -35 325 67.9 370 -35 335 64.8 371 -35 345 65.0 372 -35 355 63.0 373 -45 5 84.2 374 -45 15 82.1 375 -45 25 80.2 376 -45 35 82.2 377 -45 45 79.2 378 -45 55 79.3 379 -45 65 81.2 380 -45 75 79.5 381 -45 85 82.8 382 -45 95 79.8 383 -45 105 82.0 384 -45 115 78.5 385 -45 125 79.6 386 -45 135 78.2 387 -45 145 68.3 388 -45 155 70.2 389 -45 165 76.3 390 -45 175 63.1 391 -45 185 74.6 392 -45 195 78.6 393 -45 205 79.5 394 -45 215 82.0 395 -45 225 80.5 396 -45 235 81.6 397 -45 245 82.8 398 -45 255 86.1 399 -45 265 82.8 400 -45 275 75.1 401 -45 285 78.6 402 -45 295 57.3 403 -45 305 58.6 404 -45 315 71.2 405 -45 325 77.4 406 -45 335 76.9 407 -45 345 79.9 408 -45 355 78.4 409 -55 10 88.9 410 -55 30 88.8 411 -55 50 87.0 412 -55 70 85.0 413 -55 90 87.7 414 -55 110 84.5 415 -55 130 83.0 416 -55 150 84.8 417 -55 170 83.3 418 -55 190 84.7 419 -55 210 84.8 420 -55 230 88.7 421 -55 250 84.9 422 -55 270 82.7 423 -55 290 76.7 424 -55 310 80.6 425 -55 330 86.7 426 -55 350 87.8 427 -65 10 83.6 428 -65 30 80.1 429 -65 50 77.0 430 -65 70 79.6 431 -65 90 87.0 432 -65 110 82.0 433 -65 130 87.2 434 -65 150 89.2 435 -65 170 90.0 436 -65 190 90.6 437 -65 210 91.6 438 -65 230 93.8 439 -65 250 91.1 440 -65 270 87.8 441 -65 290 84.4 442 -65 310 90.2 443 -65 330 92.9 444 -65 350 88.0 449 -75 180 80.4 450 -75 220 86.8 451 -75 260 89.4 452 -75 300 82.7 453 -75 340 75.0