Stratocumulus Amount-When-Present (%) December, January, February (1954 - 1997) Day, Ship Observations Only Global Average: 70.5 Zonal Averages 17 zones Lat.N Average 85 80.7 75 80.2 65 79.2 55 78.4 45 77.0 35 72.4 25 68.0 15 62.7 5 65.6 -5 63.6 -15 65.7 -25 67.7 -35 72.0 -45 76.6 -55 79.0 -65 78.1 -75 70.6 Grid Box Averages 382 filled boxes Box # Lat.N Lon.E Average 2 85 180 80.7 4 75 20 80.7 5 75 60 83.2 8 75 180 82.0 9 75 220 78.9 12 75 340 74.8 13 65 10 75.9 14 65 30 77.3 15 65 50 79.7 21 65 170 81.6 22 65 190 85.5 23 65 210 74.0 27 65 290 81.5 29 65 330 74.0 30 65 350 77.5 31 55 10 76.3 32 55 30 80.4 38 55 150 77.4 39 55 170 79.0 40 55 190 79.7 41 55 210 78.8 42 55 230 78.6 45 55 290 80.1 46 55 310 84.0 47 55 330 76.0 48 55 350 73.5 49 45 5 63.7 50 45 15 63.2 51 45 25 78.4 52 45 35 80.2 53 45 45 75.9 54 45 55 78.0 61 45 125 71.9 62 45 135 75.8 63 45 145 76.1 64 45 155 78.8 65 45 165 76.5 66 45 175 76.1 67 45 185 76.3 68 45 195 76.2 69 45 205 77.7 70 45 215 77.9 71 45 225 78.2 72 45 235 74.7 77 45 285 76.0 78 45 295 78.4 79 45 305 80.1 80 45 315 80.2 81 45 325 77.2 82 45 335 76.5 83 45 345 75.5 84 45 355 76.2 85 35 5 64.2 86 35 15 63.9 87 35 25 65.7 88 35 35 61.6 90 35 55 73.6 96 35 115 65.3 97 35 125 75.3 98 35 135 74.9 99 35 145 75.3 100 35 155 74.9 101 35 165 72.5 102 35 175 72.3 103 35 185 73.3 104 35 195 72.9 105 35 205 72.6 106 35 215 74.1 107 35 225 74.6 108 35 235 71.6 109 35 245 62.4 112 35 275 66.5 113 35 285 73.6 114 35 295 76.3 115 35 305 72.6 116 35 315 70.3 117 35 325 70.5 118 35 335 71.3 119 35 345 71.1 120 35 355 64.3 124 25 35 54.8 125 25 45 63.3 126 25 55 53.8 127 25 65 46.5 129 25 85 54.9 131 25 105 87.3 132 25 115 79.8 133 25 125 77.6 134 25 135 73.3 135 25 145 69.9 136 25 155 67.6 137 25 165 65.6 138 25 175 65.6 139 25 185 65.5 140 25 195 65.2 141 25 205 64.7 142 25 215 68.6 143 25 225 73.4 144 25 235 75.8 145 25 245 63.4 146 25 255 57.5 147 25 265 70.8 148 25 275 65.0 149 25 285 64.0 150 25 295 63.2 151 25 305 63.2 152 25 315 63.0 153 25 325 62.8 154 25 335 66.0 155 25 345 61.2 160 15 35 62.9 161 15 45 58.9 162 15 55 52.3 163 15 65 51.4 164 15 75 44.5 165 15 85 53.7 166 15 95 48.6 167 15 105 74.2 168 15 115 64.3 169 15 125 65.2 170 15 135 67.5 171 15 145 63.8 172 15 155 58.7 173 15 165 58.5 174 15 175 60.2 175 15 185 59.0 176 15 195 61.3 177 15 205 60.4 178 15 215 67.2 179 15 225 71.1 180 15 235 73.8 181 15 245 70.1 182 15 255 53.2 183 15 265 44.1 184 15 275 55.5 185 15 285 55.6 186 15 295 54.8 187 15 305 56.2 188 15 315 59.1 189 15 325 63.5 190 15 335 64.0 191 15 345 61.5 193 5 5 64.4 197 5 45 52.9 198 5 55 59.5 199 5 65 56.3 200 5 75 54.9 201 5 85 61.3 202 5 95 60.3 203 5 105 65.1 204 5 115 64.5 205 5 125 64.1 206 5 135 64.5 207 5 145 67.6 208 5 155 67.7 209 5 165 64.9 210 5 175 66.6 211 5 185 64.7 212 5 195 63.6 213 5 205 66.3 214 5 215 67.9 215 5 225 71.4 216 5 235 70.1 217 5 245 69.4 218 5 255 68.0 219 5 265 66.0 220 5 275 60.9 221 5 285 63.4 223 5 305 59.9 224 5 315 65.7 225 5 325 68.5 226 5 335 69.7 227 5 345 65.6 228 5 355 63.9 229 -5 5 68.8 230 -5 15 74.6 232 -5 35 56.3 233 -5 45 56.7 234 -5 55 60.2 235 -5 65 61.4 236 -5 75 64.1 237 -5 85 63.6 238 -5 95 64.5 239 -5 105 66.1 240 -5 115 64.0 241 -5 125 60.9 242 -5 135 63.0 243 -5 145 65.0 244 -5 155 68.4 245 -5 165 67.3 246 -5 175 65.6 247 -5 185 57.3 248 -5 195 60.9 249 -5 205 58.0 250 -5 215 56.0 251 -5 225 56.1 252 -5 235 55.4 253 -5 245 62.3 254 -5 255 66.1 255 -5 265 68.9 256 -5 275 64.8 257 -5 285 64.5 260 -5 315 57.3 261 -5 325 57.5 262 -5 335 59.4 263 -5 345 63.0 264 -5 355 68.9 265 -15 5 77.7 266 -15 15 73.5 268 -15 35 61.2 269 -15 45 62.4 270 -15 55 59.1 271 -15 65 59.5 272 -15 75 62.4 273 -15 85 63.7 274 -15 95 63.6 275 -15 105 65.4 276 -15 115 59.3 277 -15 125 59.1 278 -15 135 64.2 279 -15 145 61.1 280 -15 155 64.5 281 -15 165 63.4 282 -15 175 62.0 283 -15 185 64.8 284 -15 195 65.7 285 -15 205 64.3 286 -15 215 64.5 287 -15 225 57.6 288 -15 235 59.4 289 -15 245 59.0 290 -15 255 63.8 291 -15 265 67.2 292 -15 275 70.4 293 -15 285 73.9 297 -15 325 58.0 298 -15 335 58.1 299 -15 345 65.2 300 -15 355 74.0 301 -25 5 73.3 302 -25 15 76.1 304 -25 35 64.8 305 -25 45 62.8 306 -25 55 60.8 307 -25 65 61.8 308 -25 75 63.7 309 -25 85 65.4 310 -25 95 68.2 311 -25 105 73.6 312 -25 115 59.9 315 -25 145 64.7 316 -25 155 62.9 317 -25 165 61.9 318 -25 175 63.0 319 -25 185 65.1 320 -25 195 64.2 321 -25 205 68.6 322 -25 215 68.3 323 -25 225 65.7 324 -25 235 62.3 325 -25 245 59.4 326 -25 255 64.3 327 -25 265 67.2 328 -25 275 75.0 329 -25 285 84.0 332 -25 315 59.0 333 -25 325 63.5 334 -25 335 61.7 335 -25 345 58.6 336 -25 355 65.8 337 -35 5 70.1 338 -35 15 66.9 339 -35 25 66.7 340 -35 35 70.4 341 -35 45 69.2 342 -35 55 71.4 343 -35 65 70.8 344 -35 75 73.0 345 -35 85 73.1 346 -35 95 74.5 347 -35 105 78.2 348 -35 115 70.6 349 -35 125 74.8 350 -35 135 74.2 351 -35 145 66.5 352 -35 155 65.5 353 -35 165 68.0 354 -35 175 62.7 355 -35 185 64.4 356 -35 195 73.5 357 -35 205 73.5 358 -35 215 74.6 359 -35 225 73.1 360 -35 235 74.5 361 -35 245 76.5 362 -35 255 75.8 363 -35 265 75.4 364 -35 275 77.6 365 -35 285 79.3 367 -35 305 62.0 368 -35 315 66.5 369 -35 325 70.8 370 -35 335 68.8 371 -35 345 69.0 372 -35 355 68.7 373 -45 5 74.8 374 -45 15 76.0 375 -45 25 74.4 376 -45 35 77.0 377 -45 45 73.7 378 -45 55 76.5 379 -45 65 77.3 380 -45 75 76.6 381 -45 85 79.8 382 -45 95 76.9 383 -45 105 78.6 384 -45 115 79.3 385 -45 125 78.4 386 -45 135 73.8 387 -45 145 66.3 388 -45 155 73.0 389 -45 165 77.6 390 -45 175 68.0 391 -45 185 75.7 392 -45 195 76.8 393 -45 205 81.2 394 -45 215 80.6 395 -45 225 83.4 396 -45 235 82.9 397 -45 245 80.4 398 -45 255 81.5 399 -45 265 77.2 400 -45 275 77.9 401 -45 285 79.7 402 -45 295 63.5 403 -45 305 67.0 404 -45 315 72.9 405 -45 325 76.3 406 -45 335 73.2 407 -45 345 73.8 408 -45 355 77.4 409 -55 10 80.4 410 -55 30 81.7 411 -55 50 81.3 412 -55 70 79.5 413 -55 90 80.2 414 -55 110 77.0 415 -55 130 75.6 416 -55 150 81.9 417 -55 170 79.9 418 -55 190 76.9 419 -55 210 81.3 420 -55 230 85.2 421 -55 250 81.5 422 -55 270 78.1 423 -55 290 70.1 424 -55 310 73.3 425 -55 330 78.7 426 -55 350 80.2 427 -65 10 77.1 428 -65 30 57.3 429 -65 50 70.2 430 -65 70 78.9 431 -65 90 81.0 432 -65 110 75.5 433 -65 130 76.4 434 -65 150 81.6 435 -65 170 80.0 436 -65 190 79.4 437 -65 210 80.0 438 -65 230 86.4 439 -65 250 84.8 440 -65 270 81.3 441 -65 290 70.4 442 -65 310 79.1 443 -65 330 82.9 444 -65 350 79.5 449 -75 180 60.9 450 -75 220 79.2 451 -75 260 70.4 452 -75 300 74.7 453 -75 340 72.8