Stratocumulus Frequency of Occurrence (%) September, October, November (1954 - 1997) , Ship Observations Only Global Average: 31.8 Zonal Averages 17 zones Lat.N Average 85 34.6 75 39.7 65 41.4 55 38.8 45 36.5 35 31.2 25 23.1 15 19.9 5 22.6 -5 23.3 -15 29.8 -25 35.0 -35 38.8 -45 39.3 -55 42.4 -65 42.3 -75 38.0 Grid Box Averages 395 filled boxes Box # Lat.N Lon.E Average 1 85 60 35.4 2 85 180 34.7 3 85 300 33.5 4 75 20 40.8 5 75 60 43.3 6 75 100 38.4 7 75 140 38.8 8 75 180 34.0 9 75 220 33.8 10 75 260 56.1 11 75 300 45.2 12 75 340 41.6 13 65 10 34.1 14 65 30 43.0 15 65 50 41.2 16 65 70 42.0 20 65 150 38.8 21 65 170 50.5 22 65 190 52.1 23 65 210 27.6 24 65 230 44.0 25 65 250 55.6 26 65 270 53.0 27 65 290 47.3 28 65 310 36.0 29 65 330 33.7 30 65 350 37.8 31 55 10 30.1 32 55 30 37.0 37 55 130 22.8 38 55 150 36.5 39 55 170 41.8 40 55 190 42.8 41 55 210 38.4 42 55 230 32.6 44 55 270 47.9 45 55 290 39.4 46 55 310 38.2 47 55 330 38.1 48 55 350 39.6 49 45 5 20.0 50 45 15 22.2 51 45 25 24.6 52 45 35 24.9 53 45 45 25.1 54 45 55 21.9 61 45 125 25.6 62 45 135 23.2 63 45 145 32.0 64 45 155 40.2 65 45 165 41.7 66 45 175 41.4 67 45 185 40.8 68 45 195 39.5 69 45 205 37.8 70 45 215 39.0 71 45 225 41.7 72 45 235 33.4 77 45 285 24.6 78 45 295 28.6 79 45 305 33.2 80 45 315 37.0 81 45 325 36.3 82 45 335 37.3 83 45 345 40.3 84 45 355 31.0 85 35 5 20.2 86 35 15 16.9 87 35 25 13.2 88 35 35 10.9 89 35 45 32.6 90 35 55 19.0 96 35 115 20.6 97 35 125 24.2 98 35 135 25.3 99 35 145 33.1 100 35 155 36.2 101 35 165 36.7 102 35 175 38.2 103 35 185 37.8 104 35 195 36.8 105 35 205 36.8 106 35 215 39.5 107 35 225 47.6 108 35 235 37.5 109 35 245 32.8 112 35 275 19.9 113 35 285 25.1 114 35 295 26.6 115 35 305 25.0 116 35 315 24.6 117 35 325 26.7 118 35 335 31.1 119 35 345 29.3 120 35 355 19.9 124 25 35 4.5 125 25 45 6.8 126 25 55 4.5 127 25 65 9.5 128 25 75 9.6 129 25 85 16.8 130 25 95 18.0 131 25 105 23.7 132 25 115 28.1 133 25 125 27.6 134 25 135 24.0 135 25 145 20.2 136 25 155 21.1 137 25 165 21.0 138 25 175 23.9 139 25 185 22.6 140 25 195 20.8 141 25 205 22.9 142 25 215 31.1 143 25 225 44.7 144 25 235 50.0 145 25 245 26.3 146 25 255 16.9 147 25 265 19.7 148 25 275 19.2 149 25 285 19.0 150 25 295 16.3 151 25 305 15.2 152 25 315 16.2 153 25 325 19.0 154 25 335 21.9 155 25 345 15.9 156 25 355 14.9 160 15 35 6.0 161 15 45 6.7 162 15 55 11.9 163 15 65 13.1 164 15 75 17.1 165 15 85 17.7 166 15 95 18.8 167 15 105 21.5 168 15 115 22.9 169 15 125 23.8 170 15 135 19.6 171 15 145 18.0 172 15 155 17.6 173 15 165 15.8 174 15 175 17.9 175 15 185 17.9 176 15 195 19.0 177 15 205 22.1 178 15 215 27.1 179 15 225 33.9 180 15 235 38.2 181 15 245 26.2 182 15 255 17.8 183 15 265 20.6 184 15 275 19.9 185 15 285 15.4 186 15 295 12.9 187 15 305 13.7 188 15 315 17.1 189 15 325 22.2 190 15 335 20.9 191 15 345 13.1 193 5 5 27.1 197 5 45 11.1 198 5 55 11.1 199 5 65 12.9 200 5 75 18.2 201 5 85 19.9 202 5 95 22.5 203 5 105 22.6 204 5 115 22.3 205 5 125 18.5 206 5 135 17.1 207 5 145 20.9 208 5 155 19.3 209 5 165 18.1 210 5 175 18.5 211 5 185 17.7 212 5 195 19.0 213 5 205 20.8 214 5 215 25.7 215 5 225 25.9 216 5 235 31.0 217 5 245 34.6 218 5 255 37.0 219 5 265 39.3 220 5 275 33.3 221 5 285 30.9 222 5 295 16.3 223 5 305 14.2 224 5 315 16.4 225 5 325 17.8 226 5 335 20.9 227 5 345 25.7 228 5 355 30.4 229 -5 5 49.3 230 -5 15 50.2 232 -5 35 10.1 233 -5 45 11.4 234 -5 55 14.6 235 -5 65 17.8 236 -5 75 19.8 237 -5 85 20.1 238 -5 95 20.9 239 -5 105 20.9 240 -5 115 12.9 241 -5 125 11.7 242 -5 135 13.5 243 -5 145 19.2 244 -5 155 21.1 245 -5 165 18.5 246 -5 175 15.3 247 -5 185 14.5 248 -5 195 12.7 249 -5 205 12.7 250 -5 215 12.9 251 -5 225 10.5 252 -5 235 11.8 253 -5 245 22.9 254 -5 255 41.4 255 -5 265 55.3 256 -5 275 52.4 257 -5 285 44.4 260 -5 315 12.4 261 -5 325 12.3 262 -5 335 19.6 263 -5 345 39.8 264 -5 355 51.6 265 -15 5 70.8 266 -15 15 44.1 268 -15 35 13.9 269 -15 45 10.1 270 -15 55 18.4 271 -15 65 21.6 272 -15 75 24.2 273 -15 85 26.2 274 -15 95 26.3 275 -15 105 27.3 276 -15 115 9.3 277 -15 125 8.1 278 -15 135 8.9 279 -15 145 16.5 280 -15 155 17.8 281 -15 165 22.1 282 -15 175 26.6 283 -15 185 22.5 284 -15 195 21.7 285 -15 205 20.6 286 -15 215 19.5 287 -15 225 13.9 288 -15 235 14.6 289 -15 245 25.2 290 -15 255 40.7 291 -15 265 52.7 292 -15 275 71.8 293 -15 285 65.0 297 -15 325 18.3 298 -15 335 30.7 299 -15 345 49.0 300 -15 355 69.3 301 -25 5 59.1 302 -25 15 36.6 304 -25 35 22.9 305 -25 45 23.0 306 -25 55 22.2 307 -25 65 29.9 308 -25 75 35.0 309 -25 85 40.1 310 -25 95 41.8 311 -25 105 41.8 312 -25 115 20.0 315 -25 145 12.7 316 -25 155 18.0 317 -25 165 27.1 318 -25 175 29.9 319 -25 185 30.2 320 -25 195 32.8 321 -25 205 33.0 322 -25 215 33.7 323 -25 225 32.5 324 -25 235 23.9 325 -25 245 22.6 326 -25 255 32.5 327 -25 265 48.0 328 -25 275 60.0 329 -25 285 59.6 332 -25 315 26.5 333 -25 325 27.3 334 -25 335 33.1 335 -25 345 36.2 336 -25 355 50.3 337 -35 5 48.4 338 -35 15 33.1 339 -35 25 29.0 340 -35 35 32.5 341 -35 45 37.5 342 -35 55 35.7 343 -35 65 41.2 344 -35 75 44.2 345 -35 85 45.5 346 -35 95 45.1 347 -35 105 47.7 348 -35 115 34.9 349 -35 125 37.5 350 -35 135 37.1 351 -35 145 31.2 352 -35 155 30.0 353 -35 165 35.2 354 -35 175 32.8 355 -35 185 35.1 356 -35 195 38.5 357 -35 205 37.8 358 -35 215 38.1 359 -35 225 33.1 360 -35 235 36.6 361 -35 245 38.7 362 -35 255 42.1 363 -35 265 49.3 364 -35 275 52.6 365 -35 285 47.3 366 -35 295 21.8 367 -35 305 25.9 368 -35 315 29.8 369 -35 325 36.2 370 -35 335 36.0 371 -35 345 38.1 372 -35 355 43.8 373 -45 5 48.1 374 -45 15 44.8 375 -45 25 37.3 376 -45 35 39.8 377 -45 45 41.9 378 -45 55 41.9 379 -45 65 36.8 380 -45 75 36.2 381 -45 85 38.3 382 -45 95 31.1 383 -45 105 34.3 384 -45 115 39.6 385 -45 125 37.6 386 -45 135 42.4 387 -45 145 35.3 388 -45 155 38.7 389 -45 165 40.2 390 -45 175 38.7 391 -45 185 41.9 392 -45 195 42.7 393 -45 205 42.6 394 -45 215 39.7 395 -45 225 38.1 396 -45 235 41.6 397 -45 245 37.9 398 -45 255 41.5 399 -45 265 35.0 400 -45 275 50.9 401 -45 285 40.1 402 -45 295 31.8 403 -45 305 30.0 404 -45 315 36.8 405 -45 325 42.6 406 -45 335 42.8 407 -45 345 39.1 408 -45 355 34.7 409 -55 10 38.8 410 -55 30 38.3 411 -55 50 34.7 412 -55 70 43.5 413 -55 90 46.1 414 -55 110 39.3 415 -55 130 40.9 416 -55 150 47.4 417 -55 170 59.0 418 -55 190 41.6 419 -55 210 40.9 420 -55 230 49.0 421 -55 250 39.0 422 -55 270 35.4 423 -55 290 38.9 424 -55 310 45.3 425 -55 330 38.0 426 -55 350 45.9 427 -65 10 59.3 429 -65 50 40.1 430 -65 70 54.5 431 -65 90 49.8 432 -65 110 40.9 433 -65 130 29.3 434 -65 150 42.0 435 -65 170 48.0 436 -65 190 39.4 440 -65 270 42.9 441 -65 290 47.5 442 -65 310 46.5 443 -65 330 18.1 444 -65 350 34.6 449 -75 180 45.0 453 -75 340 27.0