Altocumulus Average Cloud Amount (%) June (1954 - 1997) Day, Ship Observations Only Global Average: 17.6 Zonal Averages 15 zones Lat.N Average 85 13.5 75 16.9 65 19.9 55 19.6 45 18.8 35 17.2 25 13.9 15 16.9 5 24.0 -5 15.7 -15 14.9 -25 16.1 -35 16.5 -45 16.6 -55 23.5 Grid Box Averages 339 filled boxes Box # Lat.N Lon.E Average 1 85 60 17.5 2 85 180 13.5 3 85 300 7.9 4 75 20 21.6 5 75 60 20.6 7 75 140 11.9 8 75 180 15.5 9 75 220 10.6 10 75 260 20.6 11 75 300 18.3 12 75 340 20.8 13 65 10 22.2 14 65 30 16.7 15 65 50 13.2 20 65 150 10.8 21 65 170 13.7 22 65 190 16.2 23 65 210 24.2 29 65 330 22.1 30 65 350 22.0 31 55 10 18.2 32 55 30 15.8 37 55 130 9.3 38 55 150 13.5 39 55 170 17.0 40 55 190 21.1 41 55 210 22.2 42 55 230 22.7 46 55 310 18.6 47 55 330 22.4 48 55 350 21.4 49 45 5 12.4 50 45 15 9.9 51 45 25 10.6 52 45 35 8.6 53 45 45 6.0 54 45 55 8.5 62 45 135 14.8 63 45 145 14.5 64 45 155 15.4 65 45 165 16.9 66 45 175 18.5 67 45 185 21.4 68 45 195 21.7 69 45 205 23.4 70 45 215 23.7 71 45 225 23.2 72 45 235 16.1 77 45 285 13.7 78 45 295 15.9 79 45 305 18.2 80 45 315 19.6 81 45 325 21.0 82 45 335 21.0 83 45 345 18.6 84 45 355 16.4 85 35 5 9.8 86 35 15 7.8 87 35 25 4.1 88 35 35 3.1 89 35 45 10.2 90 35 55 11.0 96 35 115 13.6 97 35 125 20.5 98 35 135 21.1 99 35 145 19.8 100 35 155 19.3 101 35 165 21.1 102 35 175 20.3 103 35 185 22.0 104 35 195 21.3 105 35 205 21.0 106 35 215 21.4 107 35 225 17.6 108 35 235 12.2 109 35 245 6.8 112 35 275 17.6 113 35 285 18.3 114 35 295 17.7 115 35 305 16.5 116 35 315 15.9 117 35 325 16.3 118 35 335 17.6 119 35 345 12.3 120 35 355 8.7 124 25 35 1.6 125 25 45 5.5 126 25 55 2.7 127 25 65 8.0 128 25 75 17.3 129 25 85 23.5 131 25 105 16.3 132 25 115 22.3 133 25 125 21.8 134 25 135 20.2 135 25 145 14.9 136 25 155 14.1 137 25 165 13.7 138 25 175 12.9 139 25 185 11.2 140 25 195 10.4 141 25 205 11.9 142 25 215 16.6 143 25 225 19.1 144 25 235 17.0 145 25 245 11.3 146 25 255 10.7 147 25 265 12.1 148 25 275 16.0 149 25 285 17.6 150 25 295 15.1 151 25 305 12.7 152 25 315 11.0 153 25 325 11.2 154 25 335 10.4 155 25 345 7.6 160 15 35 4.7 161 15 45 6.1 162 15 55 9.1 163 15 65 16.6 164 15 75 24.7 165 15 85 22.9 166 15 95 31.6 167 15 105 25.5 168 15 115 21.6 169 15 125 17.8 170 15 135 14.8 171 15 145 12.8 172 15 155 11.8 173 15 165 12.4 174 15 175 11.5 175 15 185 12.1 176 15 195 11.9 177 15 205 14.8 178 15 215 17.7 179 15 225 22.1 180 15 235 22.7 181 15 245 19.3 182 15 255 20.9 183 15 265 30.7 184 15 275 24.7 185 15 285 16.4 186 15 295 13.1 187 15 305 13.9 188 15 315 14.8 189 15 325 16.5 190 15 335 14.6 191 15 345 14.2 193 5 5 30.0 197 5 45 11.7 198 5 55 10.1 199 5 65 21.7 200 5 75 27.1 201 5 85 26.4 202 5 95 34.3 203 5 105 28.4 204 5 115 27.8 205 5 125 28.1 206 5 135 33.2 207 5 145 22.7 208 5 155 21.1 209 5 165 23.2 210 5 175 25.0 211 5 185 22.6 212 5 195 23.1 213 5 205 19.7 214 5 215 20.0 215 5 225 16.7 216 5 235 17.6 217 5 245 18.7 218 5 255 27.4 219 5 265 28.9 220 5 275 37.9 221 5 285 38.9 223 5 305 23.9 224 5 315 21.5 225 5 325 18.6 226 5 335 23.1 227 5 345 26.6 228 5 355 25.6 229 -5 5 13.4 230 -5 15 16.3 232 -5 35 15.1 233 -5 45 12.9 234 -5 55 15.9 235 -5 65 22.3 236 -5 75 22.0 237 -5 85 29.1 238 -5 95 27.3 239 -5 105 23.7 240 -5 115 18.3 241 -5 125 18.9 242 -5 135 20.5 243 -5 145 25.3 244 -5 155 21.9 245 -5 165 20.1 246 -5 175 15.6 247 -5 185 16.9 248 -5 195 12.1 249 -5 205 10.9 250 -5 215 9.5 251 -5 225 8.4 252 -5 235 6.5 253 -5 245 8.1 254 -5 255 11.4 255 -5 265 15.3 256 -5 275 19.4 257 -5 285 24.8 260 -5 315 16.0 261 -5 325 13.6 262 -5 335 9.3 263 -5 345 9.0 264 -5 355 9.3 265 -15 5 11.5 266 -15 15 28.2 268 -15 35 8.9 269 -15 45 10.9 270 -15 55 14.1 271 -15 65 13.1 272 -15 75 17.0 273 -15 85 18.1 274 -15 95 20.8 275 -15 105 18.3 276 -15 115 12.1 277 -15 125 6.8 278 -15 135 12.0 279 -15 145 13.6 280 -15 155 16.1 281 -15 165 18.1 282 -15 175 16.8 283 -15 185 18.2 284 -15 195 17.9 285 -15 205 15.0 286 -15 215 12.3 287 -15 225 14.0 288 -15 235 9.3 289 -15 245 11.0 290 -15 255 14.4 291 -15 265 15.6 292 -15 275 18.9 293 -15 285 25.4 297 -15 325 14.8 298 -15 335 11.3 299 -15 345 12.2 300 -15 355 13.4 301 -25 5 11.6 302 -25 15 9.3 304 -25 35 8.4 305 -25 45 11.1 306 -25 55 13.9 307 -25 65 13.9 308 -25 75 13.3 309 -25 85 14.9 310 -25 95 17.2 311 -25 105 17.0 312 -25 115 13.7 315 -25 145 11.6 316 -25 155 12.6 317 -25 165 16.3 318 -25 175 20.0 319 -25 185 20.9 320 -25 195 22.0 321 -25 205 24.3 322 -25 215 19.6 323 -25 225 20.0 324 -25 235 17.1 325 -25 245 14.7 326 -25 255 12.0 327 -25 265 16.2 328 -25 275 12.6 329 -25 285 19.4 332 -25 315 19.4 333 -25 325 15.1 334 -25 335 15.2 335 -25 345 16.5 336 -25 355 16.5 337 -35 5 19.2 338 -35 15 12.0 339 -35 25 12.6 340 -35 35 10.8 341 -35 45 12.5 342 -35 55 14.2 343 -35 65 13.3 344 -35 75 14.9 345 -35 85 13.8 346 -35 95 14.4 347 -35 105 15.4 348 -35 115 17.7 349 -35 125 19.0 350 -35 135 19.3 351 -35 145 19.3 352 -35 155 16.3 353 -35 165 17.3 354 -35 175 16.3 355 -35 185 14.0 356 -35 195 15.5 357 -35 205 19.4 358 -35 215 18.5 359 -35 225 16.2 360 -35 235 22.7 361 -35 245 17.9 362 -35 255 12.9 363 -35 265 17.4 364 -35 275 12.9 365 -35 285 14.8 367 -35 305 17.9 368 -35 315 18.6 369 -35 325 22.4 370 -35 335 20.7 371 -35 345 19.4 372 -35 355 19.5 377 -45 45 20.6 380 -45 75 14.6 386 -45 135 23.0 387 -45 145 16.3 388 -45 155 22.8 389 -45 165 20.6 390 -45 175 17.2 391 -45 185 16.6 392 -45 195 17.1 393 -45 205 18.6 394 -45 215 15.6 395 -45 225 13.8 396 -45 235 13.2 397 -45 245 9.3 398 -45 255 10.2 399 -45 265 11.7 400 -45 275 12.4 401 -45 285 10.3 402 -45 295 17.1 403 -45 305 18.9 404 -45 315 22.1 405 -45 325 21.5 411 -55 50 9.6 412 -55 70 40.5 417 -55 170 24.5 423 -55 290 14.8 424 -55 310 24.8 425 -55 330 25.6