Total Cloud Cover Average Cloud Amount (%) June (1954 - 1997) Day, Ship Observations Only Global Average: 68.1 Zonal Averages 16 zones Lat.N Average 85 82.9 75 82.3 65 79.5 55 82.5 45 80.7 35 67.4 25 56.7 15 62.4 5 68.2 -5 56.1 -15 58.0 -25 61.3 -35 69.4 -45 78.3 -55 83.4 -65 74.6 Grid Box Averages 360 filled boxes Box # Lat.N Lon.E Average 1 85 60 86.3 2 85 180 83.3 3 85 300 77.8 4 75 20 83.8 5 75 60 82.3 6 75 100 77.8 7 75 140 90.6 8 75 180 85.0 9 75 220 80.3 10 75 260 71.5 11 75 300 68.9 12 75 340 85.3 13 65 10 77.3 14 65 30 74.7 15 65 50 71.8 20 65 150 66.6 21 65 170 78.2 22 65 190 81.3 23 65 210 80.0 27 65 290 74.5 28 65 310 81.0 29 65 330 83.3 30 65 350 81.2 31 55 10 64.2 32 55 30 54.6 37 55 130 71.6 38 55 150 77.0 39 55 170 88.2 40 55 190 91.0 41 55 210 87.8 42 55 230 83.7 45 55 290 69.7 46 55 310 82.5 47 55 330 85.6 48 55 350 74.1 49 45 5 43.5 50 45 15 36.9 51 45 25 41.5 52 45 35 43.2 53 45 45 49.2 54 45 55 39.8 61 45 125 71.9 62 45 135 76.1 63 45 145 79.7 64 45 155 90.1 65 45 165 94.4 66 45 175 94.7 67 45 185 93.2 68 45 195 92.7 69 45 205 91.1 70 45 215 89.1 71 45 225 84.3 72 45 235 71.7 77 45 285 58.2 78 45 295 66.4 79 45 305 73.2 80 45 315 78.8 81 45 325 77.8 82 45 335 78.2 83 45 345 73.2 84 45 355 61.6 85 35 5 38.4 86 35 15 30.5 87 35 25 20.1 88 35 35 22.8 89 35 45 55.7 90 35 55 39.7 96 35 115 57.8 97 35 125 72.3 98 35 135 76.8 99 35 145 79.5 100 35 155 83.0 101 35 165 83.9 102 35 175 79.9 103 35 185 79.3 104 35 195 79.0 105 35 205 75.1 106 35 215 76.0 107 35 225 76.1 108 35 235 68.0 109 35 245 69.9 112 35 275 56.9 113 35 285 60.5 114 35 295 63.5 115 35 305 62.2 116 35 315 58.9 117 35 325 59.4 118 35 335 64.3 119 35 345 62.5 120 35 355 37.8 124 25 35 10.2 125 25 45 16.4 126 25 55 16.0 127 25 65 48.3 128 25 75 57.1 129 25 85 75.3 131 25 105 63.0 132 25 115 69.2 133 25 125 69.7 134 25 135 67.0 135 25 145 56.9 136 25 155 54.5 137 25 165 54.5 138 25 175 54.6 139 25 185 52.2 140 25 195 51.6 141 25 205 55.5 142 25 215 65.5 143 25 225 76.0 144 25 235 78.1 145 25 245 60.3 146 25 255 40.3 147 25 265 49.8 148 25 275 53.7 149 25 285 57.9 150 25 295 56.3 151 25 305 51.3 152 25 315 48.3 153 25 325 50.0 154 25 335 56.0 155 25 345 42.0 160 15 35 24.0 161 15 45 31.9 162 15 55 48.0 163 15 65 70.3 164 15 75 79.3 165 15 85 74.2 166 15 95 78.5 167 15 105 67.8 168 15 115 67.6 169 15 125 63.4 170 15 135 59.5 171 15 145 55.5 172 15 155 55.0 173 15 165 57.3 174 15 175 56.2 175 15 185 56.3 176 15 195 54.4 177 15 205 58.5 178 15 215 64.4 179 15 225 70.3 180 15 235 71.7 181 15 245 67.5 182 15 255 59.1 183 15 265 69.4 184 15 275 67.6 185 15 285 61.2 186 15 295 56.2 187 15 305 59.9 188 15 315 61.5 189 15 325 66.9 190 15 335 67.0 191 15 345 52.8 193 5 5 75.3 197 5 45 52.5 198 5 55 55.7 199 5 65 69.3 200 5 75 73.1 201 5 85 68.9 202 5 95 74.6 203 5 105 70.3 204 5 115 70.4 205 5 125 70.3 206 5 135 72.9 207 5 145 68.2 208 5 155 67.8 209 5 165 66.9 210 5 175 67.0 211 5 185 67.9 212 5 195 64.8 213 5 205 63.8 214 5 215 65.0 215 5 225 62.9 216 5 235 64.3 217 5 245 64.7 218 5 255 69.8 219 5 265 74.2 220 5 275 81.2 221 5 285 81.6 222 5 295 68.8 223 5 305 70.0 224 5 315 64.7 225 5 325 60.0 226 5 335 68.4 227 5 345 73.6 228 5 355 71.5 229 -5 5 56.5 230 -5 15 57.3 232 -5 35 60.0 233 -5 45 54.3 234 -5 55 61.0 235 -5 65 65.6 236 -5 75 67.3 237 -5 85 68.8 238 -5 95 69.0 239 -5 105 64.2 240 -5 115 53.4 241 -5 125 53.7 242 -5 135 63.4 243 -5 145 66.4 244 -5 155 67.0 245 -5 165 61.9 246 -5 175 58.9 247 -5 185 55.6 248 -5 195 53.4 249 -5 205 50.5 250 -5 215 45.9 251 -5 225 44.2 252 -5 235 40.4 253 -5 245 42.5 254 -5 255 46.2 255 -5 265 58.6 256 -5 275 73.7 257 -5 285 82.8 260 -5 315 53.7 261 -5 325 55.0 262 -5 335 48.2 263 -5 345 44.7 264 -5 355 47.1 265 -15 5 67.2 266 -15 15 59.5 268 -15 35 44.0 269 -15 45 44.3 270 -15 55 55.4 271 -15 65 56.0 272 -15 75 60.2 273 -15 85 62.7 274 -15 95 67.8 275 -15 105 61.8 276 -15 115 41.1 277 -15 125 32.4 278 -15 135 49.9 279 -15 145 53.5 280 -15 155 60.7 281 -15 165 65.4 282 -15 175 60.2 283 -15 185 63.2 284 -15 195 59.3 285 -15 205 56.7 286 -15 215 54.3 287 -15 225 51.0 288 -15 235 47.0 289 -15 245 49.7 290 -15 255 55.0 291 -15 265 65.9 292 -15 275 82.0 293 -15 285 84.6 297 -15 325 55.1 298 -15 335 51.0 299 -15 345 54.5 300 -15 355 62.6 301 -25 5 62.4 302 -25 15 43.0 304 -25 35 43.0 305 -25 45 50.6 306 -25 55 54.9 307 -25 65 57.3 308 -25 75 59.2 309 -25 85 61.0 310 -25 95 63.0 311 -25 105 63.0 312 -25 115 51.2 315 -25 145 47.9 316 -25 155 52.7 317 -25 165 62.0 318 -25 175 66.8 319 -25 185 65.6 320 -25 195 66.4 321 -25 205 67.7 322 -25 215 68.0 323 -25 225 66.3 324 -25 235 61.1 325 -25 245 58.4 326 -25 255 65.0 327 -25 265 64.8 328 -25 275 68.1 329 -25 285 74.0 332 -25 315 57.0 333 -25 325 55.9 334 -25 335 59.1 335 -25 345 60.4 336 -25 355 63.9 337 -35 5 69.4 338 -35 15 54.9 339 -35 25 49.0 340 -35 35 49.4 341 -35 45 61.0 342 -35 55 66.0 343 -35 65 68.1 344 -35 75 67.5 345 -35 85 69.9 346 -35 95 69.7 347 -35 105 69.8 348 -35 115 68.5 349 -35 125 68.2 350 -35 135 70.2 351 -35 145 69.2 352 -35 155 62.2 353 -35 165 69.9 354 -35 175 67.8 355 -35 185 69.6 356 -35 195 71.4 357 -35 205 71.0 358 -35 215 74.8 359 -35 225 72.6 360 -35 235 76.3 361 -35 245 77.9 362 -35 255 77.0 363 -35 265 80.1 364 -35 275 78.8 365 -35 285 71.7 367 -35 305 67.3 368 -35 315 70.3 369 -35 325 72.9 370 -35 335 72.2 371 -35 345 71.9 372 -35 355 72.7 376 -45 35 80.3 377 -45 45 84.0 378 -45 55 80.7 379 -45 65 80.4 380 -45 75 79.5 383 -45 105 77.3 384 -45 115 76.5 385 -45 125 76.0 386 -45 135 74.2 387 -45 145 70.4 388 -45 155 77.3 389 -45 165 79.1 390 -45 175 67.2 391 -45 185 78.0 392 -45 195 78.1 393 -45 205 79.1 394 -45 215 81.3 395 -45 225 84.3 396 -45 235 78.5 397 -45 245 84.4 398 -45 255 79.3 399 -45 265 83.1 400 -45 275 82.2 401 -45 285 80.0 402 -45 295 67.8 403 -45 305 70.7 404 -45 315 78.0 405 -45 325 78.6 406 -45 335 80.6 407 -45 345 77.3 408 -45 355 76.7 409 -55 10 79.6 411 -55 50 87.9 412 -55 70 88.4 417 -55 170 86.5 419 -55 210 81.0 420 -55 230 86.2 421 -55 250 85.7 422 -55 270 85.1 423 -55 290 77.2 424 -55 310 78.6 425 -55 330 80.1 442 -65 310 74.6