Altocumulus Average Cloud Amount (%) November (1954 - 1997) , Ship Observations Only Global Average: 17.5 Zonal Averages 17 zones Lat.N Average 85 11.6 75 10.1 65 13.7 55 13.3 45 14.5 35 17.0 25 13.5 15 14.2 5 20.6 -5 17.0 -15 18.1 -25 19.3 -35 18.2 -45 20.4 -55 22.7 -65 16.7 -75 19.5 Grid Box Averages 378 filled boxes Box # Lat.N Lon.E Average 1 85 60 13.0 2 85 180 12.2 3 85 300 8.8 4 75 20 15.0 5 75 60 9.4 6 75 100 9.0 7 75 140 6.6 8 75 180 10.7 9 75 220 7.0 10 75 260 4.1 11 75 300 11.9 12 75 340 16.1 13 65 10 18.6 14 65 30 13.2 15 65 50 12.0 21 65 170 6.1 22 65 190 4.4 23 65 210 16.9 27 65 290 14.8 28 65 310 14.5 29 65 330 15.4 30 65 350 16.0 31 55 10 15.9 32 55 30 20.4 38 55 150 8.5 39 55 170 10.9 40 55 190 11.6 41 55 210 12.8 42 55 230 13.6 45 55 290 12.4 46 55 310 13.6 47 55 330 17.0 48 55 350 16.6 49 45 5 15.6 50 45 15 17.1 51 45 25 16.1 52 45 35 10.2 53 45 45 17.0 54 45 55 11.6 61 45 125 5.9 62 45 135 8.4 63 45 145 10.0 64 45 155 11.7 65 45 165 11.6 66 45 175 11.7 67 45 185 13.3 68 45 195 14.1 69 45 205 13.7 70 45 215 14.6 71 45 225 15.0 72 45 235 15.7 77 45 285 14.5 78 45 295 15.1 79 45 305 17.7 80 45 315 17.3 81 45 325 18.0 82 45 335 17.9 83 45 345 16.7 84 45 355 17.3 85 35 5 16.1 86 35 15 15.4 87 35 25 13.3 88 35 35 11.7 90 35 55 13.4 96 35 115 16.6 97 35 125 15.2 98 35 135 16.1 99 35 145 15.5 100 35 155 17.4 101 35 165 17.6 102 35 175 16.5 103 35 185 17.8 104 35 195 19.3 105 35 205 20.3 106 35 215 19.1 107 35 225 17.1 108 35 235 12.4 109 35 245 8.1 112 35 275 13.9 113 35 285 17.2 114 35 295 17.9 115 35 305 17.7 116 35 315 17.7 117 35 325 18.3 118 35 335 19.1 119 35 345 16.5 120 35 355 15.2 124 25 35 4.7 125 25 45 9.1 126 25 55 4.4 127 25 65 3.3 128 25 75 9.5 129 25 85 10.2 130 25 95 5.3 131 25 105 16.3 132 25 115 17.9 133 25 125 17.7 134 25 135 15.4 135 25 145 13.1 136 25 155 13.0 137 25 165 10.7 138 25 175 12.3 139 25 185 13.3 140 25 195 13.9 141 25 205 12.8 142 25 215 14.4 143 25 225 17.5 144 25 235 16.9 145 25 245 11.7 146 25 255 10.5 147 25 265 15.3 148 25 275 14.9 149 25 285 14.0 150 25 295 13.2 151 25 305 14.1 152 25 315 13.8 153 25 325 14.2 154 25 335 11.9 155 25 345 10.2 160 15 35 5.3 161 15 45 4.0 162 15 55 6.1 163 15 65 7.0 164 15 75 12.5 165 15 85 14.9 166 15 95 13.9 167 15 105 18.6 168 15 115 15.3 169 15 125 14.8 170 15 135 12.4 171 15 145 11.3 172 15 155 10.9 173 15 165 9.9 174 15 175 13.0 175 15 185 15.0 176 15 195 15.7 177 15 205 15.6 178 15 215 17.4 179 15 225 23.2 180 15 235 24.0 181 15 245 16.7 182 15 255 10.9 183 15 265 11.6 184 15 275 18.1 185 15 285 13.3 186 15 295 11.2 187 15 305 13.5 188 15 315 16.8 189 15 325 17.8 190 15 335 15.6 191 15 345 11.7 193 5 5 22.4 197 5 45 8.5 198 5 55 10.8 199 5 65 14.2 200 5 75 21.1 201 5 85 26.3 202 5 95 33.2 203 5 105 28.6 204 5 115 23.5 205 5 125 20.3 206 5 135 20.7 207 5 145 17.9 208 5 155 20.3 209 5 165 21.3 210 5 175 21.6 211 5 185 22.4 212 5 195 18.6 213 5 205 20.5 214 5 215 19.5 215 5 225 20.1 216 5 235 18.2 217 5 245 22.2 218 5 255 17.5 219 5 265 21.6 220 5 275 28.3 221 5 285 28.3 223 5 305 17.3 224 5 315 17.4 225 5 325 18.1 226 5 335 22.2 227 5 345 18.8 228 5 355 18.4 229 -5 5 28.0 230 -5 15 20.3 232 -5 35 7.9 233 -5 45 9.1 234 -5 55 14.3 235 -5 65 18.3 236 -5 75 21.5 237 -5 85 26.9 238 -5 95 30.2 239 -5 105 30.1 240 -5 115 23.8 241 -5 125 16.4 242 -5 135 16.6 243 -5 145 24.0 244 -5 155 22.4 245 -5 165 23.7 246 -5 175 20.2 247 -5 185 19.9 248 -5 195 12.2 249 -5 205 7.7 250 -5 215 7.3 251 -5 225 6.5 252 -5 235 5.4 253 -5 245 9.8 254 -5 255 13.8 255 -5 265 18.3 256 -5 275 21.9 257 -5 285 23.3 260 -5 315 9.3 261 -5 325 8.6 262 -5 335 11.2 263 -5 345 15.7 264 -5 355 19.6 265 -15 5 21.9 266 -15 15 24.8 268 -15 35 11.6 269 -15 45 9.2 270 -15 55 12.4 271 -15 65 14.0 272 -15 75 18.9 273 -15 85 20.6 274 -15 95 20.1 275 -15 105 14.7 276 -15 115 7.5 277 -15 125 8.5 278 -15 135 9.9 279 -15 145 12.2 280 -15 155 11.7 281 -15 165 18.2 282 -15 175 21.5 283 -15 185 23.2 284 -15 195 23.4 285 -15 205 20.7 286 -15 215 16.9 287 -15 225 12.4 288 -15 235 13.6 289 -15 245 16.8 290 -15 255 20.7 291 -15 265 27.0 292 -15 275 25.3 293 -15 285 15.8 297 -15 325 18.7 298 -15 335 17.6 299 -15 345 26.9 300 -15 355 25.9 301 -25 5 16.0 302 -25 15 13.9 304 -25 35 15.6 305 -25 45 14.4 306 -25 55 15.7 307 -25 65 15.4 308 -25 75 17.4 309 -25 85 18.8 310 -25 95 20.5 311 -25 105 18.1 312 -25 115 9.2 315 -25 145 9.9 316 -25 155 11.8 317 -25 165 15.6 318 -25 175 21.2 319 -25 185 23.3 320 -25 195 22.4 321 -25 205 22.5 322 -25 215 27.2 323 -25 225 21.9 324 -25 235 19.0 325 -25 245 19.7 326 -25 255 20.1 327 -25 265 21.6 328 -25 275 18.1 329 -25 285 14.9 332 -25 315 24.7 333 -25 325 23.8 334 -25 335 18.2 335 -25 345 22.4 336 -25 355 24.4 337 -35 5 19.8 338 -35 15 12.1 339 -35 25 15.0 340 -35 35 17.5 341 -35 45 17.1 342 -35 55 18.0 343 -35 65 20.7 344 -35 75 21.2 345 -35 85 21.7 346 -35 95 20.4 347 -35 105 17.4 348 -35 115 14.7 349 -35 125 19.9 350 -35 135 16.8 351 -35 145 16.8 352 -35 155 15.7 353 -35 165 19.7 354 -35 175 19.0 355 -35 185 20.8 356 -35 195 19.5 357 -35 205 21.2 358 -35 215 20.0 359 -35 225 16.8 360 -35 235 16.2 361 -35 245 16.0 362 -35 255 17.5 363 -35 265 15.0 364 -35 275 14.5 365 -35 285 12.5 366 -35 295 14.3 367 -35 305 15.6 368 -35 315 17.1 369 -35 325 22.1 370 -35 335 18.8 371 -35 345 20.6 372 -35 355 24.2 373 -45 5 17.0 374 -45 15 17.6 375 -45 25 26.8 376 -45 35 27.7 377 -45 45 18.0 378 -45 55 14.7 379 -45 65 25.5 380 -45 75 23.4 381 -45 85 17.8 382 -45 95 23.6 383 -45 105 23.8 384 -45 115 19.8 385 -45 125 19.0 386 -45 135 27.9 387 -45 145 18.7 388 -45 155 20.2 389 -45 165 21.8 390 -45 175 20.4 391 -45 185 18.8 392 -45 195 17.3 393 -45 205 16.8 394 -45 215 19.9 396 -45 235 13.3 397 -45 245 16.3 400 -45 275 11.1 401 -45 285 16.0 402 -45 295 12.9 403 -45 305 17.5 404 -45 315 17.1 405 -45 325 30.1 406 -45 335 31.5 407 -45 345 21.8 408 -45 355 21.9 409 -55 10 22.2 410 -55 30 28.6 411 -55 50 19.5 412 -55 70 18.5 413 -55 90 17.2 414 -55 110 22.3 415 -55 130 27.6 416 -55 150 17.8 417 -55 170 19.2 419 -55 210 15.4 420 -55 230 21.3 421 -55 250 22.9 422 -55 270 25.7 423 -55 290 21.2 424 -55 310 29.0 425 -55 330 30.9 426 -55 350 27.1 429 -65 50 17.2 430 -65 70 12.9 431 -65 90 22.2 432 -65 110 15.7 433 -65 130 16.0 434 -65 150 20.9 435 -65 170 10.4 436 -65 190 17.6 441 -65 290 14.4 442 -65 310 25.7 444 -65 350 12.1 449 -75 180 20.9 453 -75 340 17.4