Total Cloud Cover Average Cloud Amount (%) February (1954 - 1997) , Ship Observations Only Global Average: 67.1 Zonal Averages 17 zones Lat.N Average 85 54.0 75 67.9 65 80.7 55 81.5 45 78.7 35 71.3 25 58.2 15 49.3 5 60.5 -5 59.9 -15 60.7 -25 61.2 -35 67.3 -45 78.4 -55 85.8 -65 87.6 -75 83.2 Grid Box Averages 387 filled boxes Box # Lat.N Lon.E Average 1 85 60 58.4 2 85 180 52.9 3 85 300 49.5 4 75 20 83.4 5 75 60 78.5 7 75 140 52.0 8 75 180 53.9 9 75 220 68.3 12 75 340 72.2 13 65 10 79.3 14 65 30 79.7 15 65 50 77.0 21 65 170 80.9 22 65 190 81.1 23 65 210 80.0 28 65 310 77.3 29 65 330 82.3 30 65 350 82.6 31 55 10 73.7 32 55 30 74.5 38 55 150 76.7 39 55 170 83.1 40 55 190 83.1 41 55 210 83.0 42 55 230 81.8 46 55 310 85.8 47 55 330 82.7 48 55 350 78.4 49 45 5 57.9 50 45 15 56.7 51 45 25 70.3 52 45 35 71.5 53 45 45 74.3 54 45 55 67.5 61 45 125 51.8 62 45 135 59.0 63 45 145 69.3 64 45 155 82.5 65 45 165 81.2 66 45 175 81.1 67 45 185 80.9 68 45 195 80.8 69 45 205 82.6 70 45 215 82.4 71 45 225 82.4 72 45 235 76.4 77 45 285 63.9 78 45 295 75.0 79 45 305 82.2 80 45 315 85.2 81 45 325 81.6 82 45 335 79.0 83 45 345 76.8 84 45 355 74.2 85 35 5 56.9 86 35 15 57.0 87 35 25 57.5 88 35 35 50.8 89 35 45 67.1 90 35 55 58.9 96 35 115 31.8 97 35 125 64.4 98 35 135 69.8 99 35 145 72.5 100 35 155 78.2 101 35 165 75.8 102 35 175 74.1 103 35 185 75.7 104 35 195 75.1 105 35 205 76.1 106 35 215 76.8 107 35 225 77.0 108 35 235 68.2 109 35 245 51.1 112 35 275 57.5 113 35 285 68.8 114 35 295 78.6 115 35 305 74.8 116 35 315 72.0 117 35 325 71.5 118 35 335 71.4 119 35 345 66.5 120 35 355 53.1 124 25 35 24.9 125 25 45 43.4 126 25 55 27.8 127 25 65 20.6 128 25 75 15.3 129 25 85 26.9 130 25 95 23.0 131 25 105 90.8 132 25 115 76.2 133 25 125 75.5 134 25 135 66.6 135 25 145 61.7 136 25 155 62.3 137 25 165 60.2 138 25 175 59.2 139 25 185 58.4 140 25 195 55.9 141 25 205 59.0 142 25 215 66.8 143 25 225 72.2 144 25 235 72.0 145 25 245 46.0 146 25 255 39.1 147 25 265 60.2 148 25 275 55.2 149 25 285 54.6 150 25 295 53.0 151 25 305 53.7 152 25 315 56.4 153 25 325 58.9 154 25 335 54.6 155 25 345 40.0 160 15 35 35.0 161 15 45 34.0 162 15 55 31.1 163 15 65 28.5 164 15 75 24.2 165 15 85 30.1 166 15 95 27.0 167 15 105 66.2 168 15 115 51.0 169 15 125 57.0 170 15 135 58.6 171 15 145 56.9 172 15 155 53.2 173 15 165 52.6 174 15 175 52.2 175 15 185 51.7 176 15 195 51.2 177 15 205 52.2 178 15 215 60.4 179 15 225 68.4 180 15 235 72.5 181 15 245 61.4 182 15 255 36.3 183 15 265 25.3 184 15 275 40.9 185 15 285 45.0 186 15 295 45.9 187 15 305 49.4 188 15 315 53.1 189 15 325 58.4 190 15 335 47.2 191 15 345 32.1 193 5 5 63.5 197 5 45 41.7 198 5 55 46.3 199 5 65 42.2 200 5 75 42.8 201 5 85 57.0 202 5 95 61.8 203 5 105 62.3 204 5 115 63.6 205 5 125 65.6 206 5 135 67.4 207 5 145 68.6 208 5 155 71.1 209 5 165 68.1 210 5 175 68.0 211 5 185 65.5 212 5 195 60.9 213 5 205 62.6 214 5 215 65.8 215 5 225 65.7 216 5 235 69.7 217 5 245 61.3 218 5 255 54.7 219 5 265 49.8 220 5 275 46.1 221 5 285 50.2 223 5 305 57.8 224 5 315 71.3 225 5 325 69.9 226 5 335 63.0 227 5 345 48.2 228 5 355 58.0 229 -5 5 63.4 230 -5 15 66.5 232 -5 35 50.9 233 -5 45 49.4 234 -5 55 56.4 235 -5 65 62.3 236 -5 75 65.2 237 -5 85 64.5 238 -5 95 70.4 239 -5 105 74.7 240 -5 115 74.5 241 -5 125 71.9 242 -5 135 75.0 243 -5 145 76.7 244 -5 155 72.4 245 -5 165 74.9 246 -5 175 68.9 247 -5 185 63.3 248 -5 195 60.0 249 -5 205 51.9 250 -5 215 47.5 251 -5 225 44.7 252 -5 235 44.1 253 -5 245 51.0 254 -5 255 53.1 255 -5 265 59.6 256 -5 275 61.2 257 -5 285 52.2 260 -5 315 71.6 261 -5 325 56.9 262 -5 335 52.5 263 -5 345 46.4 264 -5 355 50.3 265 -15 5 70.0 266 -15 15 66.8 268 -15 35 56.8 269 -15 45 63.0 270 -15 55 63.1 271 -15 65 61.0 272 -15 75 63.6 273 -15 85 61.2 274 -15 95 63.2 275 -15 105 61.7 276 -15 115 55.2 277 -15 125 68.7 278 -15 135 75.0 279 -15 145 71.8 280 -15 155 66.0 281 -15 165 64.8 282 -15 175 68.3 283 -15 185 69.7 284 -15 195 69.9 285 -15 205 65.2 286 -15 215 60.4 287 -15 225 53.9 288 -15 235 49.8 289 -15 245 48.9 290 -15 255 53.4 291 -15 265 59.0 292 -15 275 65.3 293 -15 285 59.0 297 -15 325 52.3 298 -15 335 46.6 299 -15 345 48.5 300 -15 355 58.3 301 -25 5 70.1 302 -25 15 59.7 304 -25 35 54.1 305 -25 45 56.8 306 -25 55 60.4 307 -25 65 61.2 308 -25 75 59.2 309 -25 85 61.8 310 -25 95 68.7 311 -25 105 67.8 312 -25 115 44.5 315 -25 145 66.2 316 -25 155 61.7 317 -25 165 61.9 318 -25 175 66.6 319 -25 185 67.7 320 -25 195 68.2 321 -25 205 70.2 322 -25 215 63.2 323 -25 225 59.6 324 -25 235 54.7 325 -25 245 50.6 326 -25 255 50.2 327 -25 265 61.9 328 -25 275 72.3 329 -25 285 71.5 332 -25 315 56.6 333 -25 325 54.7 334 -25 335 53.0 335 -25 345 52.0 336 -25 355 59.5 337 -35 5 68.5 338 -35 15 50.9 339 -35 25 56.4 340 -35 35 63.7 341 -35 45 62.9 342 -35 55 68.2 343 -35 65 70.1 344 -35 75 71.9 345 -35 85 73.0 346 -35 95 74.8 347 -35 105 73.6 348 -35 115 55.2 349 -35 125 71.3 350 -35 135 65.7 351 -35 145 54.5 352 -35 155 60.8 353 -35 165 67.1 354 -35 175 60.5 355 -35 185 67.9 356 -35 195 72.7 357 -35 205 73.3 358 -35 215 75.0 359 -35 225 75.3 360 -35 235 68.4 361 -35 245 62.9 362 -35 255 67.3 363 -35 265 73.8 364 -35 275 73.4 365 -35 285 66.7 367 -35 305 52.0 368 -35 315 62.5 369 -35 325 69.0 370 -35 335 65.3 371 -35 345 66.3 372 -35 355 65.3 373 -45 5 84.7 374 -45 15 82.0 375 -45 25 80.2 376 -45 35 84.3 377 -45 45 82.3 378 -45 55 80.6 379 -45 65 81.4 380 -45 75 80.7 381 -45 85 84.1 382 -45 95 82.1 383 -45 105 80.3 384 -45 115 77.3 385 -45 125 81.2 386 -45 135 79.1 387 -45 145 67.6 388 -45 155 71.3 389 -45 165 76.9 390 -45 175 63.5 391 -45 185 76.1 392 -45 195 77.6 393 -45 205 80.2 394 -45 215 82.6 395 -45 225 80.6 396 -45 235 80.6 397 -45 245 82.2 398 -45 255 86.1 399 -45 265 83.9 400 -45 275 77.3 401 -45 285 77.3 402 -45 295 56.2 403 -45 305 58.1 404 -45 315 72.7 405 -45 325 76.9 406 -45 335 80.6 407 -45 345 79.0 408 -45 355 79.7 409 -55 10 90.1 410 -55 30 89.6 411 -55 50 87.5 412 -55 70 86.1 413 -55 90 88.0 414 -55 110 86.0 415 -55 130 84.7 416 -55 150 86.0 417 -55 170 84.2 418 -55 190 83.8 419 -55 210 86.0 420 -55 230 89.8 421 -55 250 86.2 422 -55 270 82.5 423 -55 290 75.8 424 -55 310 79.5 425 -55 330 88.0 426 -55 350 89.2 427 -65 10 83.9 428 -65 30 79.8 429 -65 50 77.8 430 -65 70 80.0 431 -65 90 86.0 432 -65 110 81.3 433 -65 130 87.3 434 -65 150 89.6 435 -65 170 90.7 436 -65 190 90.9 437 -65 210 92.4 438 -65 230 93.7 439 -65 250 91.6 440 -65 270 88.1 441 -65 290 84.0 442 -65 310 90.4 443 -65 330 93.4 444 -65 350 87.7 449 -75 180 81.2 450 -75 220 86.7 451 -75 260 90.3 452 -75 300 83.2 453 -75 340 76.1