Stratocumulus Frequency of Occurrence (%) June, July, August (1954 - 1997) , Ship Observations Only Global Average: 30.6 Zonal Averages 17 zones Lat.N Average 85 26.0 75 33.4 65 37.7 55 36.2 45 33.7 35 30.3 25 24.0 15 23.2 5 23.2 -5 21.8 -15 29.1 -25 33.9 -35 35.2 -45 38.5 -55 41.5 -65 39.2 -75 15.9 Grid Box Averages 385 filled boxes Box # Lat.N Lon.E Average 1 85 60 25.6 2 85 180 29.1 3 85 300 21.9 4 75 20 41.3 5 75 60 39.2 6 75 100 32.8 7 75 140 27.0 8 75 180 26.9 9 75 220 30.7 10 75 260 45.3 11 75 300 28.6 12 75 340 31.8 13 65 10 38.7 14 65 30 41.0 15 65 50 39.6 16 65 70 39.3 20 65 150 30.1 21 65 170 42.0 22 65 190 38.3 23 65 210 36.6 24 65 230 34.4 25 65 250 43.0 26 65 270 39.6 27 65 290 35.9 28 65 310 29.5 29 65 330 37.2 30 65 350 40.1 31 55 10 27.4 32 55 30 25.6 37 55 130 25.3 38 55 150 29.9 39 55 170 34.0 40 55 190 36.3 41 55 210 40.2 42 55 230 39.9 44 55 270 32.8 45 55 290 31.1 46 55 310 33.3 47 55 330 41.9 48 55 350 43.1 49 45 5 12.8 50 45 15 11.7 51 45 25 14.6 52 45 35 16.1 53 45 45 20.0 54 45 55 17.4 61 45 125 33.1 62 45 135 28.4 63 45 145 28.8 64 45 155 30.3 65 45 165 30.4 66 45 175 32.9 67 45 185 35.2 68 45 195 37.3 69 45 205 39.9 70 45 215 44.4 71 45 225 48.6 72 45 235 40.4 77 45 285 18.8 78 45 295 18.5 79 45 305 23.9 80 45 315 29.1 81 45 325 36.6 82 45 335 39.9 83 45 345 41.4 84 45 355 28.7 85 35 5 12.8 86 35 15 7.7 87 35 25 5.0 88 35 35 9.5 89 35 45 27.3 90 35 55 20.3 96 35 115 24.2 97 35 125 22.9 98 35 135 23.8 99 35 145 32.2 100 35 155 36.0 101 35 165 34.8 102 35 175 33.3 103 35 185 33.6 104 35 195 34.5 105 35 205 40.0 106 35 215 46.7 107 35 225 56.4 108 35 235 42.9 109 35 245 42.9 112 35 275 14.8 113 35 285 19.9 114 35 295 21.3 115 35 305 20.2 116 35 315 18.1 117 35 325 24.1 118 35 335 34.5 119 35 345 36.7 120 35 355 15.7 124 25 35 2.6 125 25 45 3.9 126 25 55 7.1 127 25 65 28.0 128 25 75 27.7 129 25 85 26.9 130 25 95 20.9 131 25 105 18.7 132 25 115 21.7 133 25 125 21.9 134 25 135 18.3 135 25 145 18.1 136 25 155 17.4 137 25 165 17.2 138 25 175 16.4 139 25 185 15.4 140 25 195 16.7 141 25 205 25.4 142 25 215 41.9 143 25 225 57.9 144 25 235 62.7 145 25 245 35.9 146 25 255 23.1 147 25 265 13.8 148 25 275 13.4 149 25 285 15.6 150 25 295 13.2 151 25 305 11.7 152 25 315 14.5 153 25 325 22.7 154 25 335 36.2 155 25 345 24.6 156 25 355 19.7 160 15 35 6.8 161 15 45 9.6 162 15 55 14.4 163 15 65 25.7 164 15 75 25.6 165 15 85 23.9 166 15 95 23.6 167 15 105 18.9 168 15 115 23.3 169 15 125 21.8 170 15 135 19.2 171 15 145 17.9 172 15 155 15.7 173 15 165 13.2 174 15 175 15.8 175 15 185 16.8 176 15 195 17.9 177 15 205 23.8 178 15 215 32.7 179 15 225 40.5 180 15 235 44.7 181 15 245 30.8 182 15 255 22.3 183 15 265 22.9 184 15 275 20.6 185 15 285 18.4 186 15 295 14.1 187 15 305 16.0 188 15 315 23.2 189 15 325 33.9 190 15 335 33.8 191 15 345 20.5 193 5 5 31.0 197 5 45 15.0 198 5 55 13.9 199 5 65 15.8 200 5 75 19.8 201 5 85 20.9 202 5 95 22.5 203 5 105 22.0 204 5 115 21.8 205 5 125 22.1 206 5 135 17.6 207 5 145 21.9 208 5 155 21.1 209 5 165 21.4 210 5 175 19.2 211 5 185 18.2 212 5 195 17.1 213 5 205 20.6 214 5 215 26.5 215 5 225 25.6 216 5 235 27.5 217 5 245 30.7 218 5 255 33.8 219 5 265 38.1 220 5 275 33.2 221 5 285 32.0 222 5 295 24.7 223 5 305 19.7 224 5 315 19.4 225 5 325 16.8 226 5 335 22.5 227 5 345 28.5 228 5 355 31.7 229 -5 5 39.7 230 -5 15 41.4 232 -5 35 16.9 233 -5 45 15.4 234 -5 55 18.9 235 -5 65 18.5 236 -5 75 20.9 237 -5 85 20.6 238 -5 95 20.9 239 -5 105 18.2 240 -5 115 15.5 241 -5 125 16.7 242 -5 135 20.1 243 -5 145 20.8 244 -5 155 24.2 245 -5 165 17.4 246 -5 175 14.7 247 -5 185 12.8 248 -5 195 14.1 249 -5 205 13.4 250 -5 215 13.5 251 -5 225 12.2 252 -5 235 11.1 253 -5 245 18.4 254 -5 255 32.5 255 -5 265 50.1 256 -5 275 55.3 257 -5 285 52.0 260 -5 315 14.1 261 -5 325 15.5 262 -5 335 15.7 263 -5 345 21.1 264 -5 355 34.8 265 -15 5 65.2 266 -15 15 38.7 268 -15 35 11.4 269 -15 45 12.5 270 -15 55 17.7 271 -15 65 20.9 272 -15 75 24.3 273 -15 85 29.0 274 -15 95 28.3 275 -15 105 26.1 276 -15 115 13.3 277 -15 125 6.5 278 -15 135 17.8 279 -15 145 23.1 280 -15 155 26.4 281 -15 165 27.9 282 -15 175 28.5 283 -15 185 25.9 284 -15 195 22.5 285 -15 205 22.0 286 -15 215 19.1 287 -15 225 15.4 288 -15 235 18.9 289 -15 245 22.9 290 -15 255 34.9 291 -15 265 48.6 292 -15 275 69.4 293 -15 285 62.8 297 -15 325 17.4 298 -15 335 23.9 299 -15 345 31.8 300 -15 355 58.0 301 -25 5 52.7 302 -25 15 29.1 304 -25 35 14.9 305 -25 45 20.6 306 -25 55 24.4 307 -25 65 33.4 308 -25 75 35.2 309 -25 85 39.2 310 -25 95 39.9 311 -25 105 35.1 312 -25 115 22.3 315 -25 145 16.4 316 -25 155 18.5 317 -25 165 27.3 318 -25 175 31.1 319 -25 185 31.9 320 -25 195 32.0 321 -25 205 36.0 322 -25 215 35.8 323 -25 225 34.3 324 -25 235 28.9 325 -25 245 24.5 326 -25 255 28.9 327 -25 265 45.7 328 -25 275 53.3 329 -25 285 54.5 332 -25 315 23.7 333 -25 325 24.6 334 -25 335 31.4 335 -25 345 36.5 336 -25 355 44.0 337 -35 5 44.3 338 -35 15 29.7 339 -35 25 19.9 340 -35 35 21.4 341 -35 45 33.0 342 -35 55 37.0 343 -35 65 39.1 344 -35 75 43.6 345 -35 85 44.1 346 -35 95 41.5 347 -35 105 38.4 348 -35 115 31.0 349 -35 125 32.0 350 -35 135 34.4 351 -35 145 33.3 352 -35 155 25.6 353 -35 165 30.8 354 -35 175 30.1 355 -35 185 30.8 356 -35 195 31.5 357 -35 205 32.7 358 -35 215 33.1 359 -35 225 35.0 360 -35 235 33.0 361 -35 245 36.8 362 -35 255 35.1 363 -35 265 42.5 364 -35 275 47.5 365 -35 285 43.0 366 -35 295 31.8 367 -35 305 28.1 368 -35 315 30.9 369 -35 325 38.5 370 -35 335 36.7 371 -35 345 34.5 372 -35 355 39.3 373 -45 5 35.9 374 -45 15 29.8 375 -45 25 38.5 376 -45 35 43.8 377 -45 45 37.0 378 -45 55 36.3 379 -45 65 30.4 380 -45 75 36.6 381 -45 85 39.2 382 -45 95 25.0 383 -45 105 40.1 384 -45 115 43.8 385 -45 125 39.7 386 -45 135 39.2 387 -45 145 33.7 388 -45 155 35.3 389 -45 165 34.8 390 -45 175 38.9 391 -45 185 42.7 392 -45 195 41.2 393 -45 205 39.2 394 -45 215 37.3 395 -45 225 40.1 396 -45 235 39.8 397 -45 245 47.2 398 -45 255 45.0 399 -45 265 44.0 400 -45 275 49.1 401 -45 285 44.3 402 -45 295 35.5 403 -45 305 34.4 404 -45 315 36.4 405 -45 325 38.4 406 -45 335 29.5 407 -45 345 36.7 408 -45 355 47.7 409 -55 10 36.7 410 -55 30 33.6 411 -55 50 36.5 412 -55 70 35.2 415 -55 130 50.8 416 -55 150 42.0 417 -55 170 64.8 418 -55 190 39.6 419 -55 210 42.6 420 -55 230 41.3 421 -55 250 35.2 422 -55 270 39.1 423 -55 290 41.9 424 -55 310 48.3 425 -55 330 39.5 426 -55 350 37.1 427 -65 10 40.3 429 -65 50 34.8 434 -65 150 35.3 436 -65 190 42.7 437 -65 210 34.5 442 -65 310 44.4 444 -65 350 40.1 450 -75 220 15.9