Altocumulus Amount-When-Present (%) June, July, August (1954 - 1997) Day, Ship Observations Only Global Average: 44.6 Zonal Averages 15 zones Lat.N Average 85 60.3 75 56.7 65 52.7 55 51.0 45 48.1 35 41.5 25 36.0 15 42.7 5 47.4 -5 40.7 -15 37.3 -25 38.3 -35 40.9 -45 48.4 -55 63.9 Grid Box Averages 348 filled boxes Box # Lat.N Lon.E Average 1 85 60 61.8 2 85 180 63.5 3 85 300 53.5 4 75 20 54.6 5 75 60 53.2 6 75 100 58.3 7 75 140 62.4 8 75 180 63.0 9 75 220 56.5 10 75 260 51.9 11 75 300 52.2 12 75 340 56.1 13 65 10 52.0 14 65 30 47.3 15 65 50 48.6 20 65 150 44.3 21 65 170 51.9 22 65 190 53.4 23 65 210 52.6 24 65 230 51.8 25 65 250 56.3 26 65 270 50.0 27 65 290 51.6 28 65 310 54.1 29 65 330 55.6 30 65 350 53.0 31 55 10 51.2 32 55 30 51.2 37 55 130 42.1 38 55 150 52.1 39 55 170 52.4 40 55 190 52.3 41 55 210 50.3 42 55 230 47.5 44 55 270 44.4 45 55 290 46.8 46 55 310 50.4 47 55 330 54.8 48 55 350 49.4 49 45 5 37.1 50 45 15 37.7 51 45 25 44.3 52 45 35 42.0 53 45 45 42.7 54 45 55 42.6 62 45 135 54.0 63 45 145 52.5 64 45 155 47.0 65 45 165 48.2 66 45 175 51.1 67 45 185 51.9 68 45 195 52.1 69 45 205 48.7 70 45 215 47.7 71 45 225 45.8 72 45 235 41.5 77 45 285 50.5 78 45 295 49.4 79 45 305 48.3 80 45 315 49.9 81 45 325 46.4 82 45 335 46.9 83 45 345 46.1 84 45 355 43.4 85 35 5 39.0 86 35 15 36.8 87 35 25 34.6 88 35 35 30.4 96 35 115 46.4 97 35 125 51.5 98 35 135 48.3 99 35 145 43.2 100 35 155 42.3 101 35 165 47.9 102 35 175 43.9 103 35 185 42.5 104 35 195 40.6 105 35 205 39.0 106 35 215 38.9 107 35 225 41.4 108 35 235 39.9 109 35 245 39.9 112 35 275 44.5 113 35 285 48.6 114 35 295 44.4 115 35 305 38.3 116 35 315 35.6 117 35 325 35.0 118 35 335 38.2 119 35 345 38.4 120 35 355 35.7 124 25 35 33.9 125 25 45 38.9 126 25 55 43.3 127 25 65 51.2 128 25 75 51.1 129 25 85 55.8 131 25 105 53.8 132 25 115 45.8 133 25 125 41.2 134 25 135 35.9 135 25 145 33.5 136 25 155 36.1 137 25 165 34.5 138 25 175 33.3 139 25 185 30.3 140 25 195 28.6 141 25 205 29.4 142 25 215 36.8 143 25 225 42.8 144 25 235 44.1 145 25 245 35.6 146 25 255 37.5 147 25 265 39.0 148 25 275 38.8 149 25 285 36.6 150 25 295 34.3 151 25 305 30.8 152 25 315 29.5 153 25 325 32.2 154 25 335 39.6 155 25 345 42.7 160 15 35 41.7 161 15 45 47.8 162 15 55 48.5 163 15 65 53.6 164 15 75 59.9 165 15 85 55.8 166 15 95 65.3 167 15 105 52.5 168 15 115 48.3 169 15 125 43.1 170 15 135 40.4 171 15 145 34.9 172 15 155 36.8 173 15 165 37.5 174 15 175 34.8 175 15 185 34.1 176 15 195 33.9 177 15 205 32.7 178 15 215 35.6 179 15 225 40.3 180 15 235 45.8 181 15 245 43.4 182 15 255 45.5 183 15 265 52.3 184 15 275 47.1 185 15 285 39.2 186 15 295 35.0 187 15 305 35.6 188 15 315 39.6 189 15 325 45.2 190 15 335 50.3 191 15 345 54.8 193 5 5 57.0 197 5 45 36.8 198 5 55 38.2 199 5 65 49.3 200 5 75 56.0 201 5 85 54.0 202 5 95 61.4 203 5 105 53.8 204 5 115 53.9 205 5 125 47.4 206 5 135 52.0 207 5 145 38.7 208 5 155 38.5 209 5 165 43.6 210 5 175 48.4 211 5 185 44.9 212 5 195 45.1 213 5 205 41.5 214 5 215 38.6 215 5 225 36.5 216 5 235 38.3 217 5 245 41.9 218 5 255 50.3 219 5 265 51.5 220 5 275 60.2 221 5 285 64.0 223 5 305 41.7 224 5 315 41.2 225 5 325 41.5 226 5 335 50.7 227 5 345 58.1 228 5 355 53.2 229 -5 5 56.1 230 -5 15 83.0 232 -5 35 35.0 233 -5 45 35.1 234 -5 55 40.9 235 -5 65 48.9 236 -5 75 46.9 237 -5 85 55.2 238 -5 95 53.2 239 -5 105 45.7 240 -5 115 38.6 241 -5 125 38.1 242 -5 135 44.3 243 -5 145 46.3 244 -5 155 42.4 245 -5 165 45.6 246 -5 175 34.6 247 -5 185 37.4 248 -5 195 31.0 249 -5 205 28.2 250 -5 215 26.7 251 -5 225 27.3 252 -5 235 27.1 253 -5 245 29.7 254 -5 255 34.4 255 -5 265 36.4 256 -5 275 50.3 257 -5 285 67.2 260 -5 315 33.1 261 -5 325 33.6 262 -5 335 33.1 263 -5 345 37.9 264 -5 355 42.4 265 -15 5 49.5 266 -15 15 84.9 268 -15 35 32.1 269 -15 45 31.4 270 -15 55 33.8 271 -15 65 34.5 272 -15 75 38.7 273 -15 85 40.9 274 -15 95 41.8 275 -15 105 36.3 276 -15 115 35.1 277 -15 125 31.6 278 -15 135 37.2 279 -15 145 35.9 280 -15 155 36.4 281 -15 165 39.3 282 -15 175 38.6 283 -15 185 39.4 284 -15 195 38.0 285 -15 205 35.1 286 -15 215 30.3 287 -15 225 32.9 288 -15 235 29.3 289 -15 245 29.5 290 -15 255 33.2 291 -15 265 32.6 292 -15 275 46.9 293 -15 285 61.0 297 -15 325 33.9 298 -15 335 33.5 299 -15 345 34.7 300 -15 355 44.5 301 -25 5 40.6 302 -25 15 45.8 304 -25 35 32.1 305 -25 45 31.8 306 -25 55 31.9 307 -25 65 33.3 308 -25 75 31.5 309 -25 85 34.9 310 -25 95 38.8 311 -25 105 38.8 312 -25 115 35.0 315 -25 145 35.0 316 -25 155 32.0 317 -25 165 34.5 318 -25 175 40.8 319 -25 185 40.6 320 -25 195 44.2 321 -25 205 47.5 322 -25 215 41.9 323 -25 225 42.4 324 -25 235 37.8 325 -25 245 34.9 326 -25 255 35.4 327 -25 265 34.7 328 -25 275 34.5 329 -25 285 45.5 332 -25 315 45.9 333 -25 325 38.7 334 -25 335 39.9 335 -25 345 41.6 336 -25 355 39.7 337 -35 5 43.2 338 -35 15 36.9 339 -35 25 36.0 340 -35 35 34.6 341 -35 45 34.4 342 -35 55 38.6 343 -35 65 36.4 344 -35 75 33.8 345 -35 85 36.3 346 -35 95 38.0 347 -35 105 38.2 348 -35 115 39.2 349 -35 125 39.3 350 -35 135 39.6 351 -35 145 41.1 352 -35 155 36.4 353 -35 165 37.8 354 -35 175 40.1 355 -35 185 38.7 356 -35 195 39.6 357 -35 205 42.6 358 -35 215 40.9 359 -35 225 44.4 360 -35 235 46.5 361 -35 245 38.6 362 -35 255 42.7 363 -35 265 47.5 364 -35 275 42.4 365 -35 285 44.3 367 -35 305 49.7 368 -35 315 48.4 369 -35 325 51.3 370 -35 335 49.0 371 -35 345 42.4 372 -35 355 43.2 377 -45 45 63.9 378 -45 55 60.0 379 -45 65 46.8 380 -45 75 49.2 386 -45 135 49.4 387 -45 145 40.5 388 -45 155 44.6 389 -45 165 46.6 390 -45 175 44.5 391 -45 185 41.0 392 -45 195 43.7 393 -45 205 47.3 394 -45 215 46.1 395 -45 225 39.0 396 -45 235 33.1 397 -45 245 43.6 398 -45 255 46.3 399 -45 265 38.1 400 -45 275 46.1 401 -45 285 49.6 402 -45 295 46.4 403 -45 305 52.5 404 -45 315 56.0 405 -45 325 60.2 406 -45 335 60.5 407 -45 345 51.0 412 -55 70 66.0 417 -55 170 63.7 423 -55 290 46.9 424 -55 310 66.0 425 -55 330 73.2