Total Cloud Cover Average Cloud Amount (%) June (1954 - 1997) Night, Ship Observations Only Global Average: 67.7 Zonal Averages 15 zones Lat.N Average 85 83.3 75 81.9 65 81.2 55 84.1 45 82.7 35 69.6 25 58.3 15 63.3 5 68.6 -5 56.4 -15 59.9 -25 62.6 -35 68.7 -45 75.6 -55 75.9 Grid Box Averages 330 filled boxes Box # Lat.N Lon.E Average 1 85 60 86.9 2 85 180 83.0 3 85 300 78.8 4 75 20 84.3 5 75 60 82.3 6 75 100 78.9 7 75 140 86.3 8 75 180 85.1 9 75 220 78.3 10 75 260 73.6 11 75 300 68.4 12 75 340 88.0 13 65 10 79.9 14 65 30 75.6 15 65 50 71.7 20 65 150 68.1 21 65 170 80.9 22 65 190 83.7 23 65 210 77.2 27 65 290 75.3 28 65 310 81.3 29 65 330 84.2 30 65 350 83.8 31 55 10 65.8 32 55 30 52.6 37 55 130 73.0 38 55 150 78.6 39 55 170 89.7 40 55 190 91.1 41 55 210 88.1 42 55 230 85.1 45 55 290 73.6 46 55 310 84.4 47 55 330 88.1 48 55 350 77.6 49 45 5 41.8 50 45 15 36.8 51 45 25 42.8 52 45 35 42.3 53 45 45 54.0 54 45 55 51.1 62 45 135 72.9 63 45 145 80.0 64 45 155 91.5 65 45 165 95.7 66 45 175 96.4 67 45 185 95.7 68 45 195 92.4 69 45 205 92.0 70 45 215 91.3 71 45 225 88.5 72 45 235 74.9 77 45 285 58.5 78 45 295 66.3 79 45 305 74.1 80 45 315 81.8 81 45 325 82.3 82 45 335 83.5 83 45 345 77.7 84 45 355 65.2 85 35 5 40.9 86 35 15 27.4 87 35 25 19.1 88 35 35 22.5 96 35 115 54.5 97 35 125 70.6 98 35 135 78.2 99 35 145 82.1 100 35 155 85.7 101 35 165 87.1 102 35 175 83.6 103 35 185 83.3 104 35 195 80.2 105 35 205 77.3 106 35 215 80.6 107 35 225 80.8 108 35 235 64.0 109 35 245 70.0 112 35 275 53.5 113 35 285 59.0 114 35 295 65.0 115 35 305 64.3 116 35 315 60.1 117 35 325 63.1 118 35 335 70.1 119 35 345 69.9 120 35 355 43.0 124 25 35 9.0 125 25 45 16.6 126 25 55 17.1 127 25 65 47.3 128 25 75 58.6 129 25 85 78.1 131 25 105 55.0 132 25 115 67.1 133 25 125 68.9 134 25 135 67.3 135 25 145 54.8 136 25 155 54.7 137 25 165 55.5 138 25 175 56.2 139 25 185 53.3 140 25 195 52.6 141 25 205 57.6 142 25 215 72.5 143 25 225 83.6 144 25 235 84.4 145 25 245 59.4 146 25 255 49.4 147 25 265 47.3 148 25 275 50.1 149 25 285 59.6 150 25 295 57.3 151 25 305 50.5 152 25 315 48.7 153 25 325 51.4 154 25 335 61.2 155 25 345 49.4 160 15 35 22.4 161 15 45 33.2 162 15 55 44.9 163 15 65 65.6 164 15 75 78.9 165 15 85 76.7 166 15 95 81.0 167 15 105 66.6 168 15 115 67.7 169 15 125 62.0 170 15 135 59.4 171 15 145 54.3 172 15 155 54.0 173 15 165 53.8 174 15 175 58.2 175 15 185 56.2 176 15 195 57.5 177 15 205 59.3 178 15 215 68.9 179 15 225 76.4 180 15 235 79.1 181 15 245 72.5 182 15 255 65.3 183 15 265 72.8 184 15 275 67.6 185 15 285 62.9 186 15 295 53.8 187 15 305 58.4 188 15 315 62.1 189 15 325 70.8 190 15 335 65.3 191 15 345 44.6 193 5 5 76.6 197 5 45 48.5 198 5 55 48.3 199 5 65 64.9 200 5 75 70.2 201 5 85 70.7 202 5 95 77.6 203 5 105 70.3 204 5 115 69.7 205 5 125 72.1 206 5 135 75.8 207 5 145 69.4 208 5 155 68.0 209 5 165 64.1 210 5 175 68.6 211 5 185 65.4 212 5 195 68.8 213 5 205 63.1 214 5 215 65.1 215 5 225 64.0 216 5 235 66.6 217 5 245 67.8 218 5 255 70.8 219 5 265 76.7 220 5 275 82.1 221 5 285 80.3 223 5 305 70.1 224 5 315 66.2 225 5 325 61.8 226 5 335 69.0 227 5 345 73.9 228 5 355 74.6 229 -5 5 63.1 230 -5 15 38.7 233 -5 45 53.1 234 -5 55 59.1 235 -5 65 62.4 236 -5 75 65.7 237 -5 85 66.5 238 -5 95 67.8 239 -5 105 60.7 240 -5 115 48.4 241 -5 125 52.3 242 -5 135 63.5 243 -5 145 66.9 244 -5 155 67.1 245 -5 165 59.2 246 -5 175 55.5 247 -5 185 54.0 248 -5 195 53.3 249 -5 205 44.7 250 -5 215 43.4 251 -5 225 46.2 252 -5 235 40.6 253 -5 245 44.7 254 -5 255 53.9 255 -5 265 67.1 256 -5 275 82.0 257 -5 285 72.6 260 -5 315 51.8 261 -5 325 56.2 262 -5 335 49.7 263 -5 345 44.5 264 -5 355 54.2 265 -15 5 75.8 266 -15 15 48.8 268 -15 35 38.8 269 -15 45 39.1 270 -15 55 57.0 271 -15 65 59.3 272 -15 75 63.0 273 -15 85 66.2 274 -15 95 69.4 275 -15 105 61.2 276 -15 115 41.7 277 -15 125 23.2 278 -15 135 48.2 279 -15 145 53.6 280 -15 155 63.6 281 -15 165 67.5 282 -15 175 66.0 283 -15 185 63.5 284 -15 195 58.3 285 -15 205 57.4 286 -15 215 55.3 287 -15 225 49.6 288 -15 235 52.3 289 -15 245 51.1 290 -15 255 60.4 291 -15 265 67.7 292 -15 275 86.4 293 -15 285 82.2 297 -15 325 55.4 298 -15 335 53.9 299 -15 345 58.9 300 -15 355 71.4 301 -25 5 70.1 302 -25 15 41.6 304 -25 35 38.3 305 -25 45 49.3 306 -25 55 56.1 307 -25 65 61.8 308 -25 75 66.7 309 -25 85 65.9 310 -25 95 67.1 311 -25 105 61.0 312 -25 115 49.5 315 -25 145 48.9 316 -25 155 53.2 317 -25 165 65.1 318 -25 175 69.9 319 -25 185 68.9 320 -25 195 63.9 321 -25 205 70.2 322 -25 215 68.1 323 -25 225 64.3 324 -25 235 58.1 325 -25 245 55.4 326 -25 255 60.7 327 -25 265 68.0 328 -25 275 73.8 329 -25 285 75.3 332 -25 315 54.4 333 -25 325 53.0 334 -25 335 63.8 335 -25 345 62.5 336 -25 355 66.5 337 -35 5 73.5 338 -35 15 53.4 339 -35 25 45.0 340 -35 35 46.6 341 -35 45 60.6 342 -35 55 66.5 343 -35 65 72.1 344 -35 75 75.0 345 -35 85 72.8 346 -35 95 72.9 347 -35 105 68.8 348 -35 115 64.1 349 -35 125 64.8 350 -35 135 69.8 351 -35 145 71.5 352 -35 155 60.4 353 -35 165 69.0 354 -35 175 66.4 355 -35 185 67.4 356 -35 195 72.5 357 -35 205 73.3 358 -35 215 72.0 359 -35 225 75.9 360 -35 235 77.1 363 -35 265 81.2 364 -35 275 76.5 365 -35 285 65.1 367 -35 305 61.5 368 -35 315 64.7 369 -35 325 68.0 370 -35 335 69.8 371 -35 345 78.1 372 -35 355 75.7 377 -45 45 76.1 387 -45 145 64.3 388 -45 155 77.4 389 -45 165 77.6 390 -45 175 62.9 391 -45 185 79.9 392 -45 195 80.4 393 -45 205 80.5 394 -45 215 81.8 397 -45 245 84.1 398 -45 255 77.9 400 -45 275 78.7 401 -45 285 81.5 402 -45 295 59.6 403 -45 305 65.4 404 -45 315 73.7 417 -55 170 83.2 423 -55 290 73.3 424 -55 310 76.5 425 -55 330 70.3