Stratocumulus Average Cloud Amount (%) September, October, November (1954 - 1997) , Ship Observations Only Global Average: 23.5 Zonal Averages 17 zones Lat.N Average 85 28.1 75 32.3 65 32.3 55 30.0 45 28.0 35 22.1 25 15.3 15 12.8 5 15.6 -5 16.3 -15 22.1 -25 25.3 -35 28.9 -45 30.1 -55 34.1 -65 32.5 -75 22.5 Grid Box Averages 395 filled boxes Box # Lat.N Lon.E Average 1 85 60 28.0 2 85 180 30.4 3 85 300 24.8 4 75 20 33.5 5 75 60 36.5 6 75 100 31.3 7 75 140 33.9 8 75 180 29.1 9 75 220 26.8 10 75 260 38.4 11 75 300 31.6 12 75 340 34.2 13 65 10 25.6 14 65 30 34.1 15 65 50 33.5 16 65 70 36.1 20 65 150 31.5 21 65 170 41.2 22 65 190 44.2 23 65 210 19.4 24 65 230 33.6 25 65 250 42.5 26 65 270 40.1 27 65 290 35.7 28 65 310 26.8 29 65 330 24.8 30 65 350 29.7 31 55 10 21.8 32 55 30 27.9 37 55 130 15.9 38 55 150 28.1 39 55 170 32.9 40 55 190 34.1 41 55 210 29.8 42 55 230 25.2 44 55 270 37.5 45 55 290 28.0 46 55 310 30.3 47 55 330 29.6 48 55 350 28.6 49 45 5 11.9 50 45 15 12.7 51 45 25 16.7 52 45 35 18.0 53 45 45 17.1 54 45 55 14.8 61 45 125 19.1 62 45 135 16.9 63 45 145 24.4 64 45 155 31.8 65 45 165 33.2 66 45 175 32.8 67 45 185 32.3 68 45 195 30.9 69 45 205 29.4 70 45 215 30.4 71 45 225 32.4 72 45 235 24.6 77 45 285 17.7 78 45 295 21.3 79 45 305 25.4 80 45 315 28.6 81 45 325 27.7 82 45 335 28.7 83 45 345 29.9 84 45 355 22.3 85 35 5 11.8 86 35 15 9.9 87 35 25 7.7 88 35 35 5.7 89 35 45 22.9 90 35 55 12.0 96 35 115 12.6 97 35 125 16.9 98 35 135 17.4 99 35 145 24.7 100 35 155 27.1 101 35 165 26.5 102 35 175 27.7 103 35 185 27.5 104 35 195 27.0 105 35 205 26.9 106 35 215 28.9 107 35 225 35.4 108 35 235 28.4 109 35 245 23.7 112 35 275 12.6 113 35 285 16.7 114 35 295 18.6 115 35 305 17.2 116 35 315 16.3 117 35 325 18.1 118 35 335 21.2 119 35 345 20.1 120 35 355 11.7 124 25 35 2.2 125 25 45 3.3 126 25 55 2.3 127 25 65 5.3 128 25 75 4.9 129 25 85 8.9 130 25 95 12.2 131 25 105 18.0 132 25 115 20.2 133 25 125 19.0 134 25 135 15.9 135 25 145 13.0 136 25 155 13.1 137 25 165 13.4 138 25 175 15.0 139 25 185 14.1 140 25 195 13.0 141 25 205 14.2 142 25 215 20.8 143 25 225 33.6 144 25 235 40.0 145 25 245 18.0 146 25 255 9.4 147 25 265 12.1 148 25 275 11.4 149 25 285 11.4 150 25 295 10.0 151 25 305 9.3 152 25 315 9.8 153 25 325 11.5 154 25 335 13.9 155 25 345 10.2 156 25 355 10.5 160 15 35 3.0 161 15 45 3.4 162 15 55 7.2 163 15 65 7.6 164 15 75 10.1 165 15 85 10.3 166 15 95 10.6 167 15 105 14.4 168 15 115 15.0 169 15 125 15.5 170 15 135 12.7 171 15 145 11.9 172 15 155 11.3 173 15 165 9.8 174 15 175 10.9 175 15 185 11.0 176 15 195 12.0 177 15 205 13.9 178 15 215 18.8 179 15 225 24.4 180 15 235 28.4 181 15 245 17.7 182 15 255 10.8 183 15 265 12.1 184 15 275 12.1 185 15 285 8.9 186 15 295 7.3 187 15 305 8.1 188 15 315 10.4 189 15 325 14.0 190 15 335 13.6 191 15 345 8.3 193 5 5 18.9 197 5 45 6.2 198 5 55 6.4 199 5 65 7.8 200 5 75 11.2 201 5 85 12.4 202 5 95 15.0 203 5 105 14.7 204 5 115 14.6 205 5 125 12.0 206 5 135 11.2 207 5 145 14.8 208 5 155 13.5 209 5 165 11.5 210 5 175 12.2 211 5 185 10.9 212 5 195 12.1 213 5 205 13.9 214 5 215 18.4 215 5 225 18.4 216 5 235 23.1 217 5 245 26.3 218 5 255 29.1 219 5 265 30.6 220 5 275 24.9 221 5 285 21.9 222 5 295 8.8 223 5 305 8.4 224 5 315 9.9 225 5 325 11.5 226 5 335 14.4 227 5 345 18.2 228 5 355 21.9 229 -5 5 40.4 230 -5 15 38.4 232 -5 35 5.5 233 -5 45 6.6 234 -5 55 9.0 235 -5 65 11.3 236 -5 75 13.1 237 -5 85 13.2 238 -5 95 14.2 239 -5 105 13.6 240 -5 115 7.3 241 -5 125 6.1 242 -5 135 8.0 243 -5 145 12.2 244 -5 155 14.4 245 -5 165 11.6 246 -5 175 9.3 247 -5 185 8.3 248 -5 195 6.9 249 -5 205 7.2 250 -5 215 6.8 251 -5 225 5.7 252 -5 235 6.7 253 -5 245 14.9 254 -5 255 30.3 255 -5 265 43.8 256 -5 275 44.4 257 -5 285 38.2 260 -5 315 6.0 261 -5 325 6.7 262 -5 335 12.3 263 -5 345 29.9 264 -5 355 43.3 265 -15 5 63.9 266 -15 15 34.9 268 -15 35 8.2 269 -15 45 5.5 270 -15 55 11.5 271 -15 65 13.9 272 -15 75 16.4 273 -15 85 17.6 274 -15 95 17.3 275 -15 105 17.4 276 -15 115 4.9 277 -15 125 3.4 278 -15 135 4.5 279 -15 145 9.5 280 -15 155 11.5 281 -15 165 14.7 282 -15 175 17.0 283 -15 185 14.8 284 -15 195 14.4 285 -15 205 13.8 286 -15 215 12.2 287 -15 225 8.7 288 -15 235 9.0 289 -15 245 16.6 290 -15 255 29.9 291 -15 265 42.2 292 -15 275 64.1 293 -15 285 57.6 297 -15 325 11.2 298 -15 335 20.8 299 -15 345 38.7 300 -15 355 62.5 301 -25 5 48.9 302 -25 15 27.9 304 -25 35 16.0 305 -25 45 15.6 306 -25 55 14.6 307 -25 65 20.9 308 -25 75 24.7 309 -25 85 29.0 310 -25 95 31.0 311 -25 105 30.8 312 -25 115 12.3 315 -25 145 7.2 316 -25 155 11.1 317 -25 165 17.0 318 -25 175 19.4 319 -25 185 20.0 320 -25 195 22.1 321 -25 205 23.0 322 -25 215 23.4 323 -25 225 21.2 324 -25 235 15.9 325 -25 245 15.4 326 -25 255 21.7 327 -25 265 36.9 328 -25 275 49.4 329 -25 285 50.1 332 -25 315 17.1 333 -25 325 18.8 334 -25 335 23.1 335 -25 345 26.0 336 -25 355 39.4 337 -35 5 37.4 338 -35 15 22.6 339 -35 25 20.3 340 -35 35 24.5 341 -35 45 27.9 342 -35 55 26.5 343 -35 65 30.9 344 -35 75 33.6 345 -35 85 35.4 346 -35 95 34.5 347 -35 105 37.4 348 -35 115 24.8 349 -35 125 27.5 350 -35 135 27.4 351 -35 145 21.3 352 -35 155 19.9 353 -35 165 24.9 354 -35 175 21.6 355 -35 185 24.3 356 -35 195 28.5 357 -35 205 28.4 358 -35 215 28.6 359 -35 225 25.3 360 -35 235 28.7 361 -35 245 30.6 362 -35 255 33.0 363 -35 265 38.6 364 -35 275 42.9 365 -35 285 36.6 366 -35 295 11.7 367 -35 305 17.0 368 -35 315 20.9 369 -35 325 25.9 370 -35 335 26.7 371 -35 345 27.0 372 -35 355 32.7 373 -45 5 31.2 374 -45 15 32.5 375 -45 25 25.4 376 -45 35 29.1 377 -45 45 31.9 378 -45 55 34.7 379 -45 65 28.3 380 -45 75 27.2 381 -45 85 30.8 382 -45 95 23.9 383 -45 105 25.6 384 -45 115 30.1 385 -45 125 28.3 386 -45 135 31.4 387 -45 145 22.8 388 -45 155 28.0 389 -45 165 30.2 390 -45 175 26.6 391 -45 185 31.8 392 -45 195 32.8 393 -45 205 34.1 394 -45 215 31.4 395 -45 225 30.9 396 -45 235 34.9 397 -45 245 32.0 398 -45 255 34.3 399 -45 265 27.1 400 -45 275 41.5 401 -45 285 30.8 402 -45 295 20.4 403 -45 305 21.3 404 -45 315 28.2 405 -45 325 33.0 406 -45 335 35.0 407 -45 345 30.8 408 -45 355 28.5 409 -55 10 30.9 410 -55 30 30.2 411 -55 50 28.8 412 -55 70 35.2 413 -55 90 38.2 414 -55 110 30.4 415 -55 130 30.0 416 -55 150 39.0 417 -55 170 48.7 418 -55 190 31.7 419 -55 210 33.7 420 -55 230 43.1 421 -55 250 33.3 422 -55 270 28.4 423 -55 290 28.4 424 -55 310 33.7 425 -55 330 29.1 426 -55 350 39.1 427 -65 10 48.1 429 -65 50 26.0 430 -65 70 36.9 431 -65 90 35.6 432 -65 110 31.1 433 -65 130 22.0 434 -65 150 35.3 435 -65 170 41.0 436 -65 190 30.9 440 -65 270 34.4 441 -65 290 35.4 442 -65 310 38.7 443 -65 330 11.4 444 -65 350 24.7 449 -75 180 24.6 453 -75 340 19.2