Altocumulus Average Cloud Amount (%) November (1954 - 1997) Day, Ship Observations Only Global Average: 18.0 Zonal Averages 17 zones Lat.N Average 85 12.5 75 12.1 65 15.4 55 14.8 45 15.7 35 17.9 25 13.9 15 14.6 5 21.1 -5 16.7 -15 17.6 -25 19.1 -35 18.8 -45 21.0 -55 23.9 -65 18.1 -75 18.3 Grid Box Averages 361 filled boxes Box # Lat.N Lon.E Average 1 85 60 13.9 2 85 180 11.3 4 75 20 16.6 5 75 60 8.2 6 75 100 9.8 7 75 140 7.0 8 75 180 13.4 9 75 220 8.2 11 75 300 16.1 12 75 340 21.5 13 65 10 21.6 14 65 30 12.7 15 65 50 13.9 21 65 170 7.6 22 65 190 5.3 23 65 210 17.4 27 65 290 15.2 28 65 310 16.1 29 65 330 17.2 30 65 350 18.7 31 55 10 18.6 32 55 30 23.7 38 55 150 9.5 39 55 170 11.7 40 55 190 12.7 41 55 210 13.9 42 55 230 15.6 45 55 290 14.7 46 55 310 15.8 47 55 330 18.1 48 55 350 18.7 49 45 5 16.4 50 45 15 17.8 51 45 25 15.0 52 45 35 12.1 53 45 45 12.1 54 45 55 14.5 62 45 135 9.2 63 45 145 10.4 64 45 155 12.7 65 45 165 12.7 66 45 175 12.6 67 45 185 14.0 68 45 195 14.5 69 45 205 14.1 70 45 215 15.5 71 45 225 16.8 72 45 235 17.5 77 45 285 15.1 78 45 295 16.1 79 45 305 19.2 80 45 315 19.8 81 45 325 19.8 82 45 335 19.5 83 45 345 18.7 84 45 355 19.1 85 35 5 16.8 86 35 15 16.7 87 35 25 14.2 88 35 35 11.8 90 35 55 14.4 96 35 115 17.0 97 35 125 16.6 98 35 135 16.6 99 35 145 15.9 100 35 155 18.0 101 35 165 18.1 102 35 175 17.5 103 35 185 17.7 104 35 195 19.6 105 35 205 20.9 106 35 215 20.4 107 35 225 18.3 108 35 235 13.6 109 35 245 7.9 112 35 275 14.2 113 35 285 18.5 114 35 295 19.6 115 35 305 18.6 116 35 315 19.1 117 35 325 20.1 118 35 335 19.8 119 35 345 17.2 120 35 355 16.1 124 25 35 4.8 125 25 45 9.5 126 25 55 4.1 127 25 65 3.3 128 25 75 8.3 129 25 85 7.2 132 25 115 18.1 133 25 125 17.8 134 25 135 15.6 135 25 145 13.6 136 25 155 13.9 137 25 165 11.6 138 25 175 12.4 139 25 185 12.6 140 25 195 14.3 141 25 205 13.6 142 25 215 15.3 143 25 225 17.1 144 25 235 17.1 145 25 245 12.1 146 25 255 10.8 147 25 265 15.7 148 25 275 14.5 149 25 285 14.7 150 25 295 14.2 151 25 305 14.4 152 25 315 14.5 153 25 325 14.3 154 25 335 12.9 155 25 345 10.8 160 15 35 5.5 161 15 45 3.6 162 15 55 6.0 163 15 65 7.4 164 15 75 13.1 165 15 85 15.2 166 15 95 13.5 167 15 105 19.2 168 15 115 15.9 169 15 125 16.4 170 15 135 13.9 171 15 145 11.1 172 15 155 11.4 173 15 165 11.4 174 15 175 13.0 175 15 185 15.7 176 15 195 16.0 177 15 205 16.7 178 15 215 17.4 179 15 225 21.7 180 15 235 24.2 181 15 245 17.6 182 15 255 11.6 183 15 265 11.1 184 15 275 17.8 185 15 285 13.8 186 15 295 12.1 187 15 305 15.0 188 15 315 16.8 189 15 325 17.0 190 15 335 15.7 191 15 345 12.0 193 5 5 19.7 197 5 45 7.8 198 5 55 11.2 199 5 65 14.6 200 5 75 21.6 201 5 85 27.2 202 5 95 32.1 203 5 105 29.9 204 5 115 26.0 205 5 125 21.6 206 5 135 22.0 207 5 145 19.4 208 5 155 22.2 209 5 165 22.7 210 5 175 23.5 211 5 185 22.3 212 5 195 19.7 213 5 205 20.2 214 5 215 19.5 215 5 225 19.2 216 5 235 18.3 217 5 245 23.6 218 5 255 18.3 219 5 265 21.6 220 5 275 26.6 221 5 285 31.1 223 5 305 18.8 224 5 315 18.3 225 5 325 18.1 226 5 335 23.6 227 5 345 19.2 228 5 355 17.7 229 -5 5 23.4 230 -5 15 27.8 232 -5 35 10.0 233 -5 45 9.4 234 -5 55 14.8 235 -5 65 17.9 236 -5 75 21.7 237 -5 85 27.8 238 -5 95 29.3 239 -5 105 34.3 240 -5 115 25.3 241 -5 125 16.6 242 -5 135 16.5 243 -5 145 24.1 244 -5 155 23.7 245 -5 165 25.0 246 -5 175 19.4 247 -5 185 18.7 248 -5 195 13.3 249 -5 205 9.3 250 -5 215 6.7 251 -5 225 5.2 252 -5 235 6.6 253 -5 245 8.7 254 -5 255 14.0 255 -5 265 15.9 256 -5 275 17.5 257 -5 285 20.5 260 -5 315 10.3 261 -5 325 8.9 262 -5 335 10.6 263 -5 345 14.7 264 -5 355 16.3 265 -15 5 16.7 266 -15 15 26.1 268 -15 35 10.6 269 -15 45 10.1 270 -15 55 12.1 271 -15 65 13.6 272 -15 75 18.2 273 -15 85 18.8 274 -15 95 18.0 275 -15 105 16.4 276 -15 115 7.4 277 -15 125 8.5 278 -15 135 10.7 279 -15 145 11.5 280 -15 155 11.9 281 -15 165 18.4 282 -15 175 21.4 283 -15 185 24.5 284 -15 195 22.9 285 -15 205 21.8 286 -15 215 17.4 287 -15 225 14.3 288 -15 235 15.2 289 -15 245 16.4 290 -15 255 19.2 291 -15 265 26.1 292 -15 275 24.7 293 -15 285 17.1 297 -15 325 19.4 298 -15 335 14.7 299 -15 345 23.2 300 -15 355 22.0 301 -25 5 13.3 302 -25 15 14.6 304 -25 35 16.2 305 -25 45 15.2 306 -25 55 16.7 307 -25 65 16.5 308 -25 75 16.3 309 -25 85 16.3 310 -25 95 18.7 311 -25 105 17.8 312 -25 115 9.3 315 -25 145 9.9 316 -25 155 12.1 317 -25 165 14.4 318 -25 175 19.3 319 -25 185 22.3 320 -25 195 23.2 321 -25 205 23.9 322 -25 215 26.9 323 -25 225 24.5 324 -25 235 19.6 325 -25 245 19.6 326 -25 255 20.5 327 -25 265 21.6 328 -25 275 14.6 329 -25 285 16.0 332 -25 315 24.5 333 -25 325 24.7 334 -25 335 21.1 335 -25 345 22.9 336 -25 355 19.9 337 -35 5 19.1 338 -35 15 12.3 339 -35 25 15.3 340 -35 35 17.1 341 -35 45 18.5 342 -35 55 18.0 343 -35 65 23.4 344 -35 75 20.9 345 -35 85 21.4 346 -35 95 19.4 347 -35 105 17.7 348 -35 115 16.4 349 -35 125 20.9 350 -35 135 19.3 351 -35 145 17.9 352 -35 155 16.3 353 -35 165 19.5 354 -35 175 19.1 355 -35 185 19.5 356 -35 195 17.9 357 -35 205 22.5 358 -35 215 21.4 359 -35 225 18.1 360 -35 235 19.5 361 -35 245 18.1 363 -35 265 18.2 364 -35 275 14.1 365 -35 285 13.7 366 -35 295 15.0 367 -35 305 15.5 368 -35 315 17.8 369 -35 325 20.0 370 -35 335 21.0 371 -35 345 20.6 372 -35 355 23.9 376 -45 35 25.9 377 -45 45 17.9 378 -45 55 19.0 379 -45 65 25.9 380 -45 75 22.9 381 -45 85 15.5 382 -45 95 19.5 383 -45 105 26.1 384 -45 115 18.1 385 -45 125 19.6 386 -45 135 27.5 387 -45 145 23.0 388 -45 155 22.2 389 -45 165 21.0 390 -45 175 19.6 391 -45 185 20.9 392 -45 195 21.3 393 -45 205 18.7 394 -45 215 19.0 400 -45 275 13.0 401 -45 285 15.5 402 -45 295 13.7 403 -45 305 18.4 404 -45 315 15.5 405 -45 325 32.1 406 -45 335 31.0 407 -45 345 19.1 409 -55 10 22.5 410 -55 30 29.6 411 -55 50 21.5 412 -55 70 18.5 413 -55 90 18.8 414 -55 110 21.3 415 -55 130 34.5 416 -55 150 17.1 417 -55 170 19.2 421 -55 250 21.6 422 -55 270 24.0 423 -55 290 20.7 424 -55 310 30.9 425 -55 330 33.3 429 -65 50 14.8 430 -65 70 12.5 431 -65 90 27.0 432 -65 110 16.8 433 -65 130 19.1 434 -65 150 18.8 435 -65 170 12.9 441 -65 290 15.7 442 -65 310 26.1 449 -75 180 20.5 453 -75 340 14.9