Stratocumulus Frequency of Occurrence (%) December, January, February (1954 - 1997) , Ship Observations Only Global Average: 30.4 Zonal Averages 17 zones Lat.N Average 85 11.9 75 21.6 65 38.4 55 37.4 45 36.6 35 35.0 25 30.1 15 21.5 5 21.8 -5 20.7 -15 24.7 -25 28.5 -35 36.6 -45 39.9 -55 40.0 -65 42.3 -75 45.9 Grid Box Averages 394 filled boxes Box # Lat.N Lon.E Average 1 85 60 11.6 2 85 180 12.3 3 85 300 11.6 4 75 20 35.8 5 75 60 30.5 6 75 100 7.5 7 75 140 11.1 8 75 180 12.4 9 75 220 16.3 11 75 300 20.8 12 75 340 34.7 13 65 10 30.0 14 65 30 33.8 15 65 50 32.0 21 65 170 51.4 22 65 190 50.2 23 65 210 26.1 27 65 290 40.5 29 65 330 37.0 30 65 350 35.5 31 55 10 31.1 32 55 30 38.4 37 55 130 33.0 38 55 150 37.4 39 55 170 40.6 40 55 190 40.5 41 55 210 36.8 42 55 230 33.1 45 55 290 32.7 46 55 310 36.5 47 55 330 35.2 48 55 350 40.5 49 45 5 26.0 50 45 15 32.8 51 45 25 34.6 52 45 35 34.0 53 45 45 32.3 54 45 55 34.8 61 45 125 22.6 62 45 135 26.7 63 45 145 35.3 64 45 155 41.1 65 45 165 40.0 66 45 175 37.9 67 45 185 37.1 68 45 195 35.2 69 45 205 35.1 70 45 215 36.5 71 45 225 39.3 72 45 235 34.0 77 45 285 28.4 78 45 295 36.7 79 45 305 38.7 80 45 315 38.3 81 45 325 34.8 82 45 335 36.3 83 45 345 39.3 84 45 355 32.7 85 35 5 24.7 86 35 15 25.0 87 35 25 24.9 88 35 35 20.6 89 35 45 25.9 90 35 55 27.0 96 35 115 13.8 97 35 125 30.9 98 35 135 31.4 99 35 145 36.4 100 35 155 38.8 101 35 165 37.5 102 35 175 37.1 103 35 185 37.2 104 35 195 36.9 105 35 205 37.5 106 35 215 41.0 107 35 225 47.4 108 35 235 37.5 109 35 245 24.9 112 35 275 27.4 113 35 285 32.7 114 35 295 35.7 115 35 305 32.9 116 35 315 31.8 117 35 325 33.7 118 35 335 36.5 119 35 345 33.9 120 35 355 23.8 124 25 35 9.1 125 25 45 14.6 126 25 55 10.9 127 25 65 8.0 128 25 75 5.4 129 25 85 11.4 130 25 95 8.0 131 25 105 36.3 132 25 115 35.9 133 25 125 39.3 134 25 135 39.1 135 25 145 33.1 136 25 155 31.7 137 25 165 31.1 138 25 175 31.8 139 25 185 31.8 140 25 195 30.2 141 25 205 29.9 142 25 215 36.4 143 25 225 46.1 144 25 235 48.9 145 25 245 25.9 146 25 255 21.0 147 25 265 31.3 148 25 275 27.7 149 25 285 26.0 150 25 295 22.4 151 25 305 21.3 152 25 315 23.9 153 25 325 26.0 154 25 335 25.5 155 25 345 16.9 156 25 355 28.6 160 15 35 14.4 161 15 45 10.5 162 15 55 11.5 163 15 65 11.3 164 15 75 7.6 165 15 85 13.4 166 15 95 12.3 167 15 105 32.2 168 15 115 26.8 169 15 125 28.3 170 15 135 24.5 171 15 145 22.9 172 15 155 19.8 173 15 165 18.7 174 15 175 21.5 175 15 185 22.4 176 15 195 21.4 177 15 205 24.7 178 15 215 29.5 179 15 225 37.3 180 15 235 43.7 181 15 245 32.1 182 15 255 15.5 183 15 265 10.5 184 15 275 16.7 185 15 285 15.6 186 15 295 14.6 187 15 305 15.0 188 15 315 19.0 189 15 325 27.1 190 15 335 20.5 191 15 345 9.8 193 5 5 17.7 197 5 45 11.2 198 5 55 14.6 199 5 65 12.4 200 5 75 14.1 201 5 85 18.2 202 5 95 19.6 203 5 105 25.7 204 5 115 24.6 205 5 125 21.4 206 5 135 16.5 207 5 145 23.6 208 5 155 21.5 209 5 165 18.9 210 5 175 20.7 211 5 185 20.4 212 5 195 20.9 213 5 205 23.5 214 5 215 27.5 215 5 225 32.1 216 5 235 30.2 217 5 245 28.9 218 5 255 26.7 219 5 265 25.0 220 5 275 21.9 221 5 285 23.0 222 5 295 15.9 223 5 305 19.4 224 5 315 24.4 225 5 325 22.7 226 5 335 24.6 227 5 345 14.7 228 5 355 18.6 229 -5 5 31.1 230 -5 15 35.5 232 -5 35 16.5 233 -5 45 12.4 234 -5 55 15.4 235 -5 65 15.5 236 -5 75 17.1 237 -5 85 16.8 238 -5 95 21.2 239 -5 105 22.7 240 -5 115 24.5 241 -5 125 18.7 242 -5 135 19.3 243 -5 145 22.8 244 -5 155 22.7 245 -5 165 20.5 246 -5 175 19.4 247 -5 185 16.7 248 -5 195 15.7 249 -5 205 16.2 250 -5 215 14.8 251 -5 225 13.2 252 -5 235 12.5 253 -5 245 19.5 254 -5 255 32.1 255 -5 265 37.3 256 -5 275 32.8 257 -5 285 27.4 260 -5 315 20.2 261 -5 325 14.2 262 -5 335 17.9 263 -5 345 26.3 264 -5 355 30.8 265 -15 5 56.0 266 -15 15 42.5 268 -15 35 16.0 269 -15 45 15.8 270 -15 55 14.2 271 -15 65 15.5 272 -15 75 19.4 273 -15 85 20.1 274 -15 95 25.9 275 -15 105 30.8 276 -15 115 19.2 277 -15 125 17.5 278 -15 135 18.0 279 -15 145 21.9 280 -15 155 18.3 281 -15 165 20.4 282 -15 175 20.4 283 -15 185 18.4 284 -15 195 19.8 285 -15 205 18.5 286 -15 215 17.4 287 -15 225 13.5 288 -15 235 14.2 289 -15 245 17.6 290 -15 255 33.5 291 -15 265 41.8 292 -15 275 42.8 293 -15 285 37.6 297 -15 325 15.2 298 -15 335 23.5 299 -15 345 33.9 300 -15 355 48.2 301 -25 5 53.0 302 -25 15 38.6 304 -25 35 18.8 305 -25 45 21.1 306 -25 55 18.6 307 -25 65 20.9 308 -25 75 23.2 309 -25 85 29.5 310 -25 95 40.9 311 -25 105 44.5 312 -25 115 25.3 315 -25 145 18.3 316 -25 155 19.9 317 -25 165 24.3 318 -25 175 23.9 319 -25 185 25.2 320 -25 195 27.7 321 -25 205 26.1 322 -25 215 24.9 323 -25 225 18.3 324 -25 235 15.8 325 -25 245 16.5 326 -25 255 26.9 327 -25 265 34.5 328 -25 275 48.0 329 -25 285 55.8 332 -25 315 24.1 333 -25 325 20.4 334 -25 335 22.5 335 -25 345 25.7 336 -25 355 37.0 337 -35 5 42.3 338 -35 15 31.7 339 -35 25 29.9 340 -35 35 29.7 341 -35 45 30.7 342 -35 55 34.4 343 -35 65 37.4 344 -35 75 39.1 345 -35 85 41.9 346 -35 95 47.3 347 -35 105 50.8 348 -35 115 35.1 349 -35 125 43.5 350 -35 135 39.2 351 -35 145 31.0 352 -35 155 31.2 353 -35 165 35.6 354 -35 175 30.2 355 -35 185 31.5 356 -35 195 35.1 357 -35 205 35.8 358 -35 215 36.9 359 -35 225 36.0 360 -35 235 33.4 361 -35 245 32.8 362 -35 255 37.9 363 -35 265 46.6 364 -35 275 49.7 365 -35 285 46.9 366 -35 295 27.4 367 -35 305 24.8 368 -35 315 27.2 369 -35 325 31.1 370 -35 335 34.0 371 -35 345 34.6 372 -35 355 37.5 373 -45 5 36.8 374 -45 15 44.8 375 -45 25 38.5 376 -45 35 33.0 377 -45 45 36.5 378 -45 55 37.4 379 -45 65 40.8 380 -45 75 42.9 381 -45 85 41.3 382 -45 95 39.2 383 -45 105 41.1 384 -45 115 43.4 385 -45 125 43.5 386 -45 135 49.2 387 -45 145 40.6 388 -45 155 38.3 389 -45 165 41.4 390 -45 175 38.0 391 -45 185 37.4 392 -45 195 39.2 393 -45 205 45.3 394 -45 215 46.4 395 -45 225 42.2 396 -45 235 41.1 397 -45 245 45.3 398 -45 255 37.9 399 -45 265 42.1 400 -45 275 48.2 401 -45 285 46.5 402 -45 295 28.3 403 -45 305 28.4 404 -45 315 32.5 405 -45 325 38.5 406 -45 335 35.6 407 -45 345 36.8 408 -45 355 35.0 409 -55 10 38.1 410 -55 30 36.2 411 -55 50 37.5 412 -55 70 39.4 413 -55 90 37.0 414 -55 110 42.2 415 -55 130 46.4 416 -55 150 44.7 417 -55 170 49.9 418 -55 190 37.0 419 -55 210 35.1 420 -55 230 40.4 421 -55 250 38.5 422 -55 270 36.6 423 -55 290 39.5 424 -55 310 43.8 425 -55 330 43.3 426 -55 350 34.5 427 -65 10 46.6 428 -65 30 39.4 429 -65 50 42.5 430 -65 70 53.4 431 -65 90 52.1 432 -65 110 47.7 433 -65 130 42.6 434 -65 150 41.2 435 -65 170 40.1 436 -65 190 28.2 437 -65 210 28.9 438 -65 230 33.0 439 -65 250 33.4 440 -65 270 45.1 441 -65 290 45.4 442 -65 310 45.0 443 -65 330 52.6 444 -65 350 53.1 449 -75 180 46.6 450 -75 220 34.3 451 -75 260 47.9 452 -75 300 51.7 453 -75 340 52.8