Stratocumulus Amount-When-Present (%) September, October, November (1954 - 1997) Day, Ship Observations Only Global Average: 71.0 Zonal Averages 17 zones Lat.N Average 85 80.3 75 80.1 65 76.9 55 76.3 45 75.6 35 69.6 25 64.7 15 62.9 5 67.2 -5 67.2 -15 71.8 -25 70.0 -35 72.7 -45 75.1 -55 79.5 -65 76.6 -75 59.8 Grid Box Averages 386 filled boxes Box # Lat.N Lon.E Average 1 85 60 79.5 2 85 180 86.6 3 85 300 71.9 4 75 20 81.9 5 75 60 85.0 6 75 100 82.5 7 75 140 86.0 8 75 180 82.8 9 75 220 76.8 10 75 260 66.4 11 75 300 68.3 12 75 340 81.5 13 65 10 74.6 14 65 30 80.3 15 65 50 81.7 16 65 70 83.1 20 65 150 77.8 21 65 170 80.1 22 65 190 83.8 23 65 210 74.3 25 65 250 73.7 26 65 270 74.2 27 65 290 73.6 28 65 310 73.3 29 65 330 73.8 30 65 350 77.5 31 55 10 72.4 32 55 30 76.5 37 55 130 70.1 38 55 150 76.2 39 55 170 77.4 40 55 190 78.8 41 55 210 76.5 42 55 230 76.6 44 55 270 77.5 45 55 290 68.5 46 55 310 78.5 47 55 330 76.7 48 55 350 71.3 49 45 5 59.4 50 45 15 56.3 51 45 25 66.1 52 45 35 72.4 53 45 45 69.3 54 45 55 69.3 62 45 135 72.8 63 45 145 75.6 64 45 155 77.7 65 45 165 78.5 66 45 175 78.3 67 45 185 78.5 68 45 195 77.6 69 45 205 76.7 70 45 215 76.9 71 45 225 76.3 72 45 235 73.2 77 45 285 71.5 78 45 295 72.9 79 45 305 74.9 80 45 315 75.7 81 45 325 74.4 82 45 335 74.7 83 45 345 72.5 84 45 355 71.0 85 35 5 58.5 86 35 15 57.9 87 35 25 56.6 88 35 35 49.9 90 35 55 63.3 96 35 115 69.3 97 35 125 67.7 98 35 135 69.0 99 35 145 74.0 100 35 155 73.6 101 35 165 70.9 102 35 175 71.9 103 35 185 72.3 104 35 195 72.1 105 35 205 71.3 106 35 215 71.3 107 35 225 72.7 108 35 235 74.0 109 35 245 68.8 112 35 275 65.1 113 35 285 66.1 114 35 295 68.9 115 35 305 67.2 116 35 315 65.3 117 35 325 66.2 118 35 335 66.5 119 35 345 66.2 120 35 355 58.6 124 25 35 45.3 125 25 45 51.1 126 25 55 47.4 127 25 65 52.3 129 25 85 53.5 131 25 105 73.6 132 25 115 70.4 133 25 125 68.5 134 25 135 66.5 135 25 145 64.4 136 25 155 61.0 137 25 165 61.9 138 25 175 62.3 139 25 185 62.6 140 25 195 60.7 141 25 205 59.8 142 25 215 64.7 143 25 225 72.8 144 25 235 77.4 145 25 245 65.9 146 25 255 53.5 147 25 265 62.1 148 25 275 60.3 149 25 285 59.6 150 25 295 60.0 151 25 305 60.1 152 25 315 58.9 153 25 325 58.7 154 25 335 61.1 155 25 345 61.2 160 15 35 47.0 161 15 45 45.8 162 15 55 57.9 163 15 65 57.5 164 15 75 56.5 165 15 85 59.2 166 15 95 57.1 167 15 105 66.3 168 15 115 64.5 169 15 125 65.2 170 15 135 65.7 171 15 145 65.6 172 15 155 62.5 173 15 165 60.5 174 15 175 60.7 175 15 185 62.3 176 15 195 61.2 177 15 205 61.1 178 15 215 65.9 179 15 225 69.6 180 15 235 71.7 181 15 245 66.0 182 15 255 58.5 183 15 265 57.6 184 15 275 60.6 185 15 285 58.1 186 15 295 55.6 187 15 305 58.6 188 15 315 60.0 189 15 325 61.8 190 15 335 63.8 191 15 345 62.3 193 5 5 68.7 197 5 45 51.7 198 5 55 55.3 199 5 65 58.4 200 5 75 60.6 201 5 85 62.8 202 5 95 65.9 203 5 105 64.7 204 5 115 66.0 205 5 125 65.0 206 5 135 65.0 207 5 145 69.4 208 5 155 68.6 209 5 165 61.5 210 5 175 65.4 211 5 185 59.3 212 5 195 61.3 213 5 205 65.9 214 5 215 69.6 215 5 225 69.4 216 5 235 72.2 217 5 245 71.6 218 5 255 73.9 219 5 265 75.8 220 5 275 74.0 221 5 285 71.6 223 5 305 58.1 224 5 315 57.9 225 5 325 61.7 226 5 335 67.4 227 5 345 69.0 228 5 355 68.3 229 -5 5 80.0 230 -5 15 79.9 232 -5 35 54.7 233 -5 45 54.5 234 -5 55 58.5 235 -5 65 61.7 236 -5 75 65.5 237 -5 85 65.5 238 -5 95 68.1 239 -5 105 64.3 240 -5 115 54.1 241 -5 125 49.2 242 -5 135 55.7 243 -5 145 60.4 244 -5 155 68.2 245 -5 165 62.6 246 -5 175 61.1 247 -5 185 57.4 248 -5 195 55.4 249 -5 205 55.3 250 -5 215 50.8 251 -5 225 57.3 252 -5 235 52.1 253 -5 245 59.0 254 -5 255 65.3 255 -5 265 73.8 256 -5 275 81.5 257 -5 285 88.3 260 -5 315 48.9 261 -5 325 52.4 262 -5 335 59.5 263 -5 345 71.2 264 -5 355 80.1 265 -15 5 87.6 266 -15 15 79.9 268 -15 35 57.0 269 -15 45 52.3 270 -15 55 57.7 271 -15 65 60.2 272 -15 75 66.1 273 -15 85 66.4 274 -15 95 64.7 275 -15 105 63.6 276 -15 115 51.3 277 -15 125 41.6 278 -15 135 49.8 279 -15 145 52.5 280 -15 155 62.9 281 -15 165 65.6 282 -15 175 63.7 283 -15 185 65.2 284 -15 195 63.6 285 -15 205 64.7 286 -15 215 59.6 287 -15 225 60.9 288 -15 235 60.4 289 -15 245 59.8 290 -15 255 68.4 291 -15 265 74.4 292 -15 275 87.0 293 -15 285 89.0 297 -15 325 59.0 298 -15 335 63.9 299 -15 345 75.0 300 -15 355 87.6 301 -25 5 78.9 302 -25 15 76.3 304 -25 35 68.2 305 -25 45 65.5 306 -25 55 61.3 307 -25 65 66.8 308 -25 75 67.2 309 -25 85 68.5 310 -25 95 71.1 311 -25 105 72.7 312 -25 115 59.2 315 -25 145 50.6 316 -25 155 58.2 317 -25 165 60.2 318 -25 175 63.6 319 -25 185 65.1 320 -25 195 66.5 321 -25 205 68.4 322 -25 215 68.5 323 -25 225 64.5 324 -25 235 62.8 325 -25 245 67.3 326 -25 255 63.1 327 -25 265 73.6 328 -25 275 79.5 329 -25 285 83.3 332 -25 315 64.1 333 -25 325 67.6 334 -25 335 67.2 335 -25 345 68.5 336 -25 355 75.3 337 -35 5 74.3 338 -35 15 68.2 339 -35 25 67.8 340 -35 35 73.1 341 -35 45 71.8 342 -35 55 71.1 343 -35 65 72.5 344 -35 75 73.5 345 -35 85 74.3 346 -35 95 73.2 347 -35 105 77.0 348 -35 115 69.4 349 -35 125 71.1 350 -35 135 71.2 351 -35 145 66.5 352 -35 155 64.3 353 -35 165 67.5 354 -35 175 64.0 355 -35 185 66.2 356 -35 195 73.1 357 -35 205 71.8 358 -35 215 74.0 359 -35 225 75.3 360 -35 235 74.2 361 -35 245 74.6 362 -35 255 78.0 363 -35 265 77.5 364 -35 275 80.3 365 -35 285 77.4 366 -35 295 63.1 367 -35 305 65.7 368 -35 315 70.1 369 -35 325 71.6 370 -35 335 73.4 371 -35 345 69.0 372 -35 355 72.2 373 -45 5 59.9 374 -45 15 72.4 375 -45 25 67.6 376 -45 35 70.2 377 -45 45 74.8 378 -45 55 82.8 379 -45 65 75.6 380 -45 75 74.6 381 -45 85 79.7 382 -45 95 77.2 383 -45 105 75.8 384 -45 115 73.7 385 -45 125 79.0 386 -45 135 72.6 387 -45 145 64.0 388 -45 155 70.9 389 -45 165 74.2 390 -45 175 67.3 391 -45 185 74.4 392 -45 195 76.4 393 -45 205 78.3 394 -45 215 78.5 395 -45 225 80.3 396 -45 235 78.1 397 -45 245 80.7 398 -45 255 79.6 399 -45 265 70.8 400 -45 275 81.2 401 -45 285 77.1 402 -45 295 64.3 403 -45 305 70.5 404 -45 315 77.2 405 -45 325 78.7 406 -45 335 78.8 407 -45 345 77.3 408 -45 355 82.0 409 -55 10 77.9 410 -55 30 77.3 411 -55 50 82.4 412 -55 70 78.8 413 -55 90 79.4 414 -55 110 74.8 415 -55 130 73.5 416 -55 150 81.4 417 -55 170 81.6 418 -55 190 74.0 419 -55 210 84.0 420 -55 230 85.4 421 -55 250 84.6 422 -55 270 80.1 423 -55 290 73.3 424 -55 310 75.2 425 -55 330 76.5 426 -55 350 87.1 427 -65 10 80.7 429 -65 50 57.6 430 -65 70 68.7 431 -65 90 71.8 432 -65 110 75.4 433 -65 130 73.8 434 -65 150 82.5 435 -65 170 86.4 436 -65 190 79.2 441 -65 290 72.1 442 -65 310 82.5 444 -65 350 76.0 449 -75 180 55.1 453 -75 340 72.3