Altocumulus Average Cloud Amount (%) June (1954 - 1997) , Ship Observations Only Global Average: 17.3 Zonal Averages 15 zones Lat.N Average 85 12.6 75 16.6 65 20.8 55 18.9 45 18.2 35 17.3 25 14.0 15 17.2 5 23.9 -5 15.5 -15 15.3 -25 15.8 -35 15.6 -45 16.2 -55 20.7 Grid Box Averages 352 filled boxes Box # Lat.N Lon.E Average 1 85 60 16.4 2 85 180 12.2 3 85 300 7.8 4 75 20 22.0 5 75 60 19.0 6 75 100 27.4 7 75 140 8.5 8 75 180 15.4 9 75 220 8.3 10 75 260 19.2 11 75 300 19.1 12 75 340 20.6 13 65 10 22.0 14 65 30 16.7 15 65 50 14.6 20 65 150 11.1 21 65 170 12.8 22 65 190 16.6 23 65 210 21.5 27 65 290 15.3 28 65 310 32.0 29 65 330 22.5 30 65 350 22.3 31 55 10 18.5 32 55 30 15.5 37 55 130 8.3 38 55 150 13.4 39 55 170 15.9 40 55 190 20.0 41 55 210 20.8 42 55 230 21.4 45 55 290 19.6 46 55 310 17.8 47 55 330 21.8 48 55 350 21.3 49 45 5 12.2 50 45 15 10.6 51 45 25 10.9 52 45 35 8.7 53 45 45 9.3 54 45 55 9.2 62 45 135 13.7 63 45 145 13.0 64 45 155 14.3 65 45 165 15.4 66 45 175 17.8 67 45 185 20.2 68 45 195 20.8 69 45 205 23.0 70 45 215 22.7 71 45 225 21.8 72 45 235 14.7 77 45 285 14.5 78 45 295 16.2 79 45 305 18.1 80 45 315 19.3 81 45 325 19.9 82 45 335 21.4 83 45 345 18.9 84 45 355 17.1 85 35 5 10.6 86 35 15 7.6 87 35 25 4.1 88 35 35 3.1 89 35 45 12.6 90 35 55 12.8 96 35 115 13.6 97 35 125 21.5 98 35 135 21.8 99 35 145 19.1 100 35 155 18.4 101 35 165 21.4 102 35 175 20.6 103 35 185 23.2 104 35 195 22.2 105 35 205 21.4 106 35 215 21.4 107 35 225 16.6 108 35 235 10.4 109 35 245 6.0 112 35 275 16.8 113 35 285 18.1 114 35 295 18.0 115 35 305 16.3 116 35 315 16.0 117 35 325 16.5 118 35 335 17.6 119 35 345 13.1 120 35 355 9.7 124 25 35 2.1 125 25 45 5.5 126 25 55 3.5 127 25 65 8.5 128 25 75 16.2 129 25 85 25.3 130 25 95 24.5 131 25 105 13.8 132 25 115 21.3 133 25 125 20.6 134 25 135 21.0 135 25 145 14.3 136 25 155 13.8 137 25 165 14.0 138 25 175 13.4 139 25 185 11.2 140 25 195 10.3 141 25 205 11.7 142 25 215 16.6 143 25 225 20.0 144 25 235 16.2 145 25 245 11.0 146 25 255 13.0 147 25 265 11.9 148 25 275 15.4 149 25 285 18.1 150 25 295 15.5 151 25 305 12.3 152 25 315 10.9 153 25 325 12.1 154 25 335 10.4 155 25 345 8.5 160 15 35 6.4 161 15 45 8.6 162 15 55 10.1 163 15 65 15.1 164 15 75 24.6 165 15 85 24.6 166 15 95 32.6 167 15 105 25.5 168 15 115 20.6 169 15 125 16.7 170 15 135 14.2 171 15 145 12.1 172 15 155 11.3 173 15 165 11.2 174 15 175 12.2 175 15 185 13.3 176 15 195 12.8 177 15 205 15.0 178 15 215 16.9 179 15 225 21.2 180 15 235 25.0 181 15 245 21.0 182 15 255 23.2 183 15 265 31.6 184 15 275 25.2 185 15 285 17.0 186 15 295 12.6 187 15 305 12.5 188 15 315 14.7 189 15 325 18.3 190 15 335 16.0 191 15 345 14.0 193 5 5 30.9 197 5 45 11.0 198 5 55 10.0 199 5 65 18.9 200 5 75 25.6 201 5 85 25.9 202 5 95 35.4 203 5 105 28.1 204 5 115 25.8 205 5 125 27.4 206 5 135 37.0 207 5 145 22.0 208 5 155 21.1 209 5 165 20.6 210 5 175 25.6 211 5 185 23.7 212 5 195 24.1 213 5 205 20.3 214 5 215 19.4 215 5 225 16.1 216 5 235 17.8 217 5 245 18.7 218 5 255 26.2 219 5 265 29.5 220 5 275 38.0 221 5 285 37.5 222 5 295 24.3 223 5 305 22.5 224 5 315 22.6 225 5 325 19.3 226 5 335 23.6 227 5 345 25.6 228 5 355 26.1 229 -5 5 15.3 230 -5 15 12.9 232 -5 35 15.1 233 -5 45 12.6 234 -5 55 15.1 235 -5 65 21.0 236 -5 75 21.4 237 -5 85 26.5 238 -5 95 25.2 239 -5 105 23.7 240 -5 115 18.4 241 -5 125 18.1 242 -5 135 22.1 243 -5 145 24.8 244 -5 155 20.9 245 -5 165 17.5 246 -5 175 14.3 247 -5 185 17.0 248 -5 195 12.1 249 -5 205 8.0 250 -5 215 7.4 251 -5 225 7.7 252 -5 235 7.0 253 -5 245 8.7 254 -5 255 12.8 255 -5 265 17.7 256 -5 275 23.1 257 -5 285 23.4 260 -5 315 16.5 261 -5 325 13.9 262 -5 335 10.1 263 -5 345 9.1 264 -5 355 10.3 265 -15 5 12.2 266 -15 15 23.7 268 -15 35 9.6 269 -15 45 11.3 270 -15 55 13.7 271 -15 65 15.3 272 -15 75 17.1 273 -15 85 17.5 274 -15 95 20.4 275 -15 105 17.3 276 -15 115 11.5 277 -15 125 6.7 278 -15 135 11.5 279 -15 145 13.9 280 -15 155 17.0 281 -15 165 20.4 282 -15 175 19.4 283 -15 185 17.6 284 -15 195 16.0 285 -15 205 14.7 286 -15 215 12.6 287 -15 225 13.5 288 -15 235 10.6 289 -15 245 11.0 290 -15 255 13.1 291 -15 265 16.7 292 -15 275 21.4 293 -15 285 27.6 297 -15 325 14.5 298 -15 335 11.2 299 -15 345 13.7 300 -15 355 14.6 301 -25 5 11.9 302 -25 15 8.2 304 -25 35 7.9 305 -25 45 11.1 306 -25 55 13.4 307 -25 65 16.0 308 -25 75 15.1 309 -25 85 14.4 310 -25 95 16.2 311 -25 105 16.3 312 -25 115 13.5 315 -25 145 12.4 316 -25 155 12.6 317 -25 165 17.5 318 -25 175 20.6 319 -25 185 20.9 320 -25 195 18.9 321 -25 205 25.2 322 -25 215 18.3 323 -25 225 17.1 324 -25 235 13.9 325 -25 245 13.0 326 -25 255 13.8 327 -25 265 16.7 328 -25 275 13.0 329 -25 285 17.2 332 -25 315 18.8 333 -25 325 14.5 334 -25 335 14.9 335 -25 345 16.2 336 -25 355 17.0 337 -35 5 18.6 338 -35 15 12.2 339 -35 25 12.1 340 -35 35 10.0 341 -35 45 13.1 342 -35 55 14.4 343 -35 65 13.0 344 -35 75 14.1 345 -35 85 13.7 346 -35 95 12.8 347 -35 105 15.0 348 -35 115 15.4 349 -35 125 17.3 350 -35 135 17.8 351 -35 145 19.1 352 -35 155 14.9 353 -35 165 15.6 354 -35 175 14.5 355 -35 185 14.2 356 -35 195 15.4 357 -35 205 18.8 358 -35 215 17.1 359 -35 225 13.3 360 -35 235 20.2 361 -35 245 19.5 362 -35 255 14.1 363 -35 265 14.3 364 -35 275 12.1 365 -35 285 15.5 367 -35 305 15.0 368 -35 315 15.9 369 -35 325 19.3 370 -35 335 17.0 371 -35 345 20.0 372 -35 355 21.5 377 -45 45 19.5 378 -45 55 15.8 379 -45 65 19.3 380 -45 75 13.5 385 -45 125 23.3 386 -45 135 20.9 387 -45 145 15.8 388 -45 155 21.1 389 -45 165 17.9 390 -45 175 15.4 391 -45 185 14.6 392 -45 195 18.2 393 -45 205 19.0 394 -45 215 17.0 395 -45 225 14.4 396 -45 235 12.1 397 -45 245 10.9 398 -45 255 7.1 399 -45 265 9.7 400 -45 275 12.2 401 -45 285 14.8 402 -45 295 13.8 403 -45 305 15.8 404 -45 315 17.0 405 -45 325 21.1 406 -45 335 15.2 407 -45 345 17.4 408 -45 355 18.1 411 -55 50 8.7 412 -55 70 47.3 417 -55 170 20.6 422 -55 270 13.8 423 -55 290 12.3 424 -55 310 19.8 425 -55 330 20.7