Stratocumulus Amount-When-Present (%) September, October, November (1954 - 1997) Night, Ship Observations Only Global Average: 74.2 Zonal Averages 17 zones Lat.N Average 85 82.0 75 82.5 65 78.8 55 78.3 45 78.0 35 72.3 25 67.5 15 65.4 5 70.8 -5 72.6 -15 76.7 -25 74.4 -35 76.5 -45 76.8 -55 81.5 -65 77.5 -75 54.3 Grid Box Averages 365 filled boxes Box # Lat.N Lon.E Average 1 85 60 79.0 2 85 180 88.6 3 85 300 76.3 4 75 20 82.3 5 75 60 84.0 6 75 100 80.7 7 75 140 89.1 8 75 180 88.3 9 75 220 81.7 10 75 260 70.5 11 75 300 71.4 12 75 340 83.0 13 65 10 75.4 14 65 30 78.3 15 65 50 80.8 21 65 170 83.0 22 65 190 85.9 23 65 210 66.3 25 65 250 79.8 26 65 270 77.2 27 65 290 77.4 28 65 310 75.9 29 65 330 73.3 30 65 350 79.8 31 55 10 72.2 32 55 30 74.0 38 55 150 78.0 39 55 170 79.9 40 55 190 80.7 41 55 210 78.5 42 55 230 78.2 44 55 270 78.9 45 55 290 74.1 46 55 310 80.5 47 55 330 78.8 48 55 350 72.7 49 45 5 59.4 50 45 15 57.9 51 45 25 70.1 52 45 35 72.7 53 45 45 67.5 54 45 55 65.8 62 45 135 72.9 63 45 145 77.3 64 45 155 80.5 65 45 165 80.8 66 45 175 80.0 67 45 185 79.5 68 45 195 78.8 69 45 205 78.5 70 45 215 79.0 71 45 225 78.8 72 45 235 74.5 77 45 285 72.6 78 45 295 75.9 79 45 305 78.0 80 45 315 78.8 81 45 325 78.3 82 45 335 78.9 83 45 345 75.7 84 45 355 72.9 85 35 5 58.5 86 35 15 59.0 87 35 25 60.2 88 35 35 53.5 97 35 125 71.5 98 35 135 68.6 99 35 145 75.1 100 35 155 75.9 101 35 165 73.3 102 35 175 72.9 103 35 185 73.3 104 35 195 74.7 105 35 205 75.0 106 35 215 75.0 107 35 225 76.0 108 35 235 77.3 109 35 245 76.0 112 35 275 61.9 113 35 285 67.2 114 35 295 71.0 115 35 305 70.4 116 35 315 67.8 117 35 325 69.2 118 35 335 70.1 119 35 345 70.7 120 35 355 59.4 124 25 35 53.6 126 25 55 56.5 127 25 65 60.6 129 25 85 53.0 132 25 115 73.4 133 25 125 69.3 134 25 135 65.8 135 25 145 64.7 136 25 155 63.2 137 25 165 65.2 138 25 175 62.8 139 25 185 62.6 140 25 195 64.1 141 25 205 63.8 142 25 215 69.0 143 25 225 77.4 144 25 235 82.5 145 25 245 71.3 146 25 255 57.5 147 25 265 60.9 148 25 275 58.9 149 25 285 61.0 150 25 295 62.3 151 25 305 62.8 152 25 315 61.8 153 25 325 62.2 154 25 335 66.2 155 25 345 66.5 160 15 35 54.8 161 15 45 56.0 162 15 55 64.1 163 15 65 59.0 164 15 75 61.2 165 15 85 57.2 166 15 95 55.6 167 15 105 68.1 168 15 115 66.3 169 15 125 65.3 170 15 135 64.5 171 15 145 67.1 172 15 155 66.3 173 15 165 64.0 174 15 175 60.4 175 15 185 61.3 176 15 195 64.8 177 15 205 64.8 178 15 215 72.3 179 15 225 74.0 180 15 235 77.0 181 15 245 69.1 182 15 255 62.3 183 15 265 59.8 184 15 275 60.7 185 15 285 58.3 186 15 295 57.0 187 15 305 59.7 188 15 315 61.3 189 15 325 63.9 190 15 335 66.4 191 15 345 65.2 193 5 5 70.3 197 5 45 59.5 198 5 55 60.4 199 5 65 62.6 200 5 75 62.9 201 5 85 62.4 202 5 95 67.4 203 5 105 64.8 204 5 115 64.3 205 5 125 64.9 206 5 135 65.7 207 5 145 71.9 208 5 155 71.2 209 5 165 65.3 210 5 175 65.7 211 5 185 63.7 212 5 195 65.5 213 5 205 67.4 214 5 215 73.7 215 5 225 72.7 216 5 235 77.0 217 5 245 80.2 218 5 255 82.4 219 5 265 79.7 220 5 275 75.2 221 5 285 70.2 223 5 305 59.8 224 5 315 62.0 225 5 325 66.9 226 5 335 70.2 227 5 345 72.5 228 5 355 74.8 229 -5 5 83.7 230 -5 15 72.3 233 -5 45 60.2 234 -5 55 64.3 235 -5 65 65.2 236 -5 75 66.5 237 -5 85 65.7 238 -5 95 67.3 239 -5 105 65.8 240 -5 115 58.6 241 -5 125 55.6 242 -5 135 63.0 243 -5 145 66.9 244 -5 155 68.6 245 -5 165 63.1 246 -5 175 60.5 247 -5 185 57.3 248 -5 195 52.6 249 -5 205 58.3 250 -5 215 55.0 251 -5 225 51.3 252 -5 235 61.0 253 -5 245 70.7 254 -5 255 79.5 255 -5 265 83.9 256 -5 275 87.6 257 -5 285 84.0 260 -5 315 47.5 261 -5 325 56.0 262 -5 335 65.1 263 -5 345 78.2 264 -5 355 86.9 265 -15 5 92.8 266 -15 15 78.2 268 -15 35 60.4 269 -15 45 58.6 270 -15 55 67.2 271 -15 65 67.8 272 -15 75 69.4 273 -15 85 67.4 274 -15 95 66.5 275 -15 105 64.4 276 -15 115 55.0 277 -15 125 42.2 278 -15 135 52.0 279 -15 145 62.1 280 -15 155 66.5 281 -15 165 66.8 282 -15 175 64.1 283 -15 185 66.2 284 -15 195 69.3 285 -15 205 69.9 286 -15 215 64.9 287 -15 225 65.0 288 -15 235 62.9 289 -15 245 71.3 290 -15 255 77.5 291 -15 265 84.8 292 -15 275 91.4 293 -15 285 88.3 297 -15 325 62.8 298 -15 335 71.3 299 -15 345 82.5 300 -15 355 92.8 301 -25 5 86.1 302 -25 15 76.1 304 -25 35 71.8 305 -25 45 70.0 306 -25 55 69.6 307 -25 65 72.5 308 -25 75 73.3 309 -25 85 75.5 310 -25 95 76.4 311 -25 105 75.0 312 -25 115 64.4 316 -25 155 64.6 317 -25 165 64.5 318 -25 175 66.1 319 -25 185 67.1 320 -25 195 67.8 321 -25 205 70.8 322 -25 215 70.0 323 -25 225 66.2 324 -25 235 70.6 325 -25 245 69.1 326 -25 255 69.6 327 -25 265 79.5 328 -25 275 84.8 329 -25 285 84.8 332 -25 315 65.3 333 -25 325 70.3 334 -25 335 72.3 335 -25 345 74.3 336 -25 355 81.0 337 -35 5 80.0 338 -35 15 68.7 339 -35 25 72.0 340 -35 35 77.2 341 -35 45 76.5 342 -35 55 77.6 343 -35 65 77.3 344 -35 75 78.4 345 -35 85 80.9 346 -35 95 79.5 347 -35 105 79.9 348 -35 115 72.4 349 -35 125 75.6 350 -35 135 76.4 351 -35 145 70.2 352 -35 155 68.2 353 -35 165 73.3 354 -35 175 67.3 355 -35 185 71.8 356 -35 195 75.0 357 -35 205 78.3 358 -35 215 76.4 359 -35 225 77.3 360 -35 235 82.4 361 -35 245 84.1 362 -35 255 79.0 363 -35 265 78.9 364 -35 275 82.7 365 -35 285 77.7 367 -35 305 65.9 368 -35 315 69.9 369 -35 325 71.5 370 -35 335 75.0 371 -35 345 72.5 372 -35 355 76.6 373 -45 5 70.4 376 -45 35 75.7 377 -45 45 77.2 378 -45 55 82.7 379 -45 65 78.3 380 -45 75 76.0 381 -45 85 81.4 382 -45 95 76.4 383 -45 105 73.4 384 -45 115 78.6 385 -45 125 71.5 386 -45 135 75.8 387 -45 145 65.3 388 -45 155 74.0 389 -45 165 76.2 390 -45 175 70.4 391 -45 185 77.0 392 -45 195 77.4 393 -45 205 81.5 394 -45 215 79.4 400 -45 275 82.1 401 -45 285 76.6 402 -45 295 64.2 403 -45 305 71.2 404 -45 315 76.0 405 -45 325 76.1 406 -45 335 85.3 407 -45 345 80.4 408 -45 355 82.7 409 -55 10 81.5 410 -55 30 80.6 411 -55 50 83.7 412 -55 70 83.3 413 -55 90 86.3 414 -55 110 80.4 415 -55 130 72.9 416 -55 150 83.0 417 -55 170 83.4 419 -55 210 81.1 420 -55 230 90.3 421 -55 250 86.5 422 -55 270 80.2 423 -55 290 72.6 424 -55 310 73.5 425 -55 330 76.5 426 -55 350 83.7 429 -65 50 71.2 430 -65 70 66.8 431 -65 90 71.3 432 -65 110 77.0 433 -65 130 76.4 434 -65 150 85.3 435 -65 170 84.4 436 -65 190 77.9 441 -65 290 77.1 442 -65 310 83.9 449 -75 180 54.3