Stratocumulus Amount-When-Present (%) December, January, February (1954 - 1997) Night, Ship Observations Only Global Average: 73.4 Zonal Averages 17 zones Lat.N Average 85 88.3 75 79.3 65 78.7 55 80.2 45 79.4 35 75.2 25 71.4 15 66.7 5 68.4 -5 68.4 -15 71.0 -25 70.9 -35 74.8 -45 77.7 -55 80.6 -65 78.9 -75 71.6 Grid Box Averages 370 filled boxes Box # Lat.N Lon.E Average 2 85 180 88.3 4 75 20 79.6 5 75 60 82.1 8 75 180 86.4 12 75 340 69.0 13 65 10 75.6 14 65 30 80.0 15 65 50 69.8 21 65 170 86.6 22 65 190 86.2 29 65 330 71.8 30 65 350 78.3 31 55 10 77.3 32 55 30 81.6 38 55 150 79.7 39 55 170 82.8 40 55 190 81.9 41 55 210 79.4 42 55 230 81.2 46 55 310 84.8 47 55 330 77.7 48 55 350 74.7 49 45 5 66.8 50 45 15 66.3 51 45 25 82.7 52 45 35 82.9 53 45 45 77.9 54 45 55 76.1 62 45 135 78.8 63 45 145 79.1 64 45 155 81.1 65 45 165 78.8 66 45 175 78.5 67 45 185 77.8 68 45 195 77.4 69 45 205 78.7 70 45 215 78.9 71 45 225 79.9 72 45 235 78.7 77 45 285 77.3 78 45 295 81.4 79 45 305 83.6 80 45 315 83.0 81 45 325 79.8 82 45 335 80.2 83 45 345 78.1 84 45 355 80.0 85 35 5 64.5 86 35 15 66.8 87 35 25 69.0 88 35 35 67.8 97 35 125 77.9 98 35 135 75.9 99 35 145 76.7 100 35 155 76.8 101 35 165 75.3 102 35 175 75.2 103 35 185 74.0 104 35 195 74.9 105 35 205 75.8 106 35 215 76.6 107 35 225 77.9 108 35 235 74.3 109 35 245 67.7 112 35 275 66.2 113 35 285 75.5 114 35 295 78.4 115 35 305 75.0 116 35 315 73.4 117 35 325 74.6 118 35 335 75.4 119 35 345 76.7 120 35 355 68.9 124 25 35 59.8 125 25 45 68.4 126 25 55 58.4 127 25 65 50.4 132 25 115 81.7 133 25 125 78.7 134 25 135 74.2 135 25 145 72.4 136 25 155 72.5 137 25 165 70.9 138 25 175 68.7 139 25 185 67.8 140 25 195 68.7 141 25 205 68.3 142 25 215 72.6 143 25 225 76.9 144 25 235 80.4 145 25 245 69.0 146 25 255 61.7 147 25 265 70.9 148 25 275 65.1 149 25 285 66.2 150 25 295 67.3 151 25 305 67.4 152 25 315 68.4 153 25 325 68.2 154 25 335 69.5 155 25 345 68.5 160 15 35 67.0 161 15 45 64.0 162 15 55 60.1 163 15 65 57.7 164 15 75 49.2 165 15 85 56.6 166 15 95 46.9 167 15 105 77.5 168 15 115 67.4 169 15 125 68.0 170 15 135 69.5 171 15 145 67.7 172 15 155 61.9 173 15 165 66.0 174 15 175 62.8 175 15 185 60.2 176 15 195 66.0 177 15 205 65.1 178 15 215 72.1 179 15 225 76.7 180 15 235 78.7 181 15 245 74.9 182 15 255 57.8 183 15 265 46.3 184 15 275 56.3 185 15 285 57.6 186 15 295 57.8 187 15 305 61.0 188 15 315 64.4 189 15 325 69.0 190 15 335 67.0 191 15 345 66.3 193 5 5 65.3 197 5 45 61.2 198 5 55 64.8 199 5 65 59.3 200 5 75 60.3 201 5 85 62.7 202 5 95 62.7 203 5 105 64.9 204 5 115 65.6 205 5 125 66.0 206 5 135 64.5 207 5 145 68.1 208 5 155 71.0 209 5 165 70.2 210 5 175 64.8 211 5 185 62.6 212 5 195 64.6 213 5 205 68.6 214 5 215 72.4 215 5 225 74.3 216 5 235 74.0 217 5 245 77.6 218 5 255 72.1 219 5 265 72.3 220 5 275 64.4 221 5 285 61.2 223 5 305 66.2 224 5 315 69.4 225 5 325 70.9 226 5 335 71.2 227 5 345 65.7 228 5 355 66.1 229 -5 5 72.5 230 -5 15 65.9 233 -5 45 59.0 234 -5 55 65.4 235 -5 65 62.7 236 -5 75 63.7 237 -5 85 63.6 238 -5 95 66.0 239 -5 105 64.6 240 -5 115 63.4 241 -5 125 61.5 242 -5 135 62.5 243 -5 145 68.4 244 -5 155 69.6 245 -5 165 70.0 246 -5 175 63.7 247 -5 185 61.1 248 -5 195 64.0 249 -5 205 59.8 250 -5 215 62.5 251 -5 225 62.3 252 -5 235 67.9 253 -5 245 72.4 254 -5 255 76.1 255 -5 265 78.2 256 -5 275 74.4 257 -5 285 62.0 260 -5 315 61.8 261 -5 325 59.0 262 -5 335 63.3 263 -5 345 72.6 264 -5 355 77.4 265 -15 5 86.4 266 -15 15 73.4 268 -15 35 63.0 269 -15 45 62.7 270 -15 55 59.3 271 -15 65 62.4 272 -15 75 65.2 273 -15 85 62.9 274 -15 95 67.2 275 -15 105 65.1 276 -15 115 57.9 277 -15 125 63.0 278 -15 135 63.1 279 -15 145 66.0 280 -15 155 66.7 281 -15 165 65.8 282 -15 175 63.0 283 -15 185 64.7 284 -15 195 63.4 285 -15 205 67.6 286 -15 215 68.3 287 -15 225 64.5 288 -15 235 62.1 289 -15 245 66.1 290 -15 255 74.7 291 -15 265 78.8 292 -15 275 81.4 293 -15 285 69.6 297 -15 325 58.1 298 -15 335 65.0 299 -15 345 77.4 300 -15 355 82.3 301 -25 5 84.2 302 -25 15 74.4 304 -25 35 66.9 305 -25 45 66.4 306 -25 55 65.6 307 -25 65 64.9 308 -25 75 68.1 309 -25 85 67.3 310 -25 95 76.5 311 -25 105 74.2 312 -25 115 61.6 316 -25 155 66.2 317 -25 165 63.7 318 -25 175 62.8 319 -25 185 64.8 320 -25 195 69.3 321 -25 205 72.5 322 -25 215 69.8 323 -25 225 65.8 324 -25 235 64.6 325 -25 245 67.0 326 -25 255 64.2 327 -25 265 73.4 328 -25 275 82.4 329 -25 285 79.7 332 -25 315 59.5 333 -25 325 62.8 334 -25 335 60.0 335 -25 345 65.1 336 -25 355 74.6 337 -35 5 76.8 338 -35 15 64.7 339 -35 25 66.2 340 -35 35 72.7 341 -35 45 75.0 342 -35 55 76.5 343 -35 65 73.3 344 -35 75 76.3 345 -35 85 76.8 346 -35 95 80.0 347 -35 105 77.3 348 -35 115 69.5 349 -35 125 77.9 350 -35 135 76.2 351 -35 145 69.9 352 -35 155 68.6 353 -35 165 72.0 354 -35 175 65.8 355 -35 185 70.9 356 -35 195 69.8 357 -35 205 73.6 358 -35 215 77.6 359 -35 225 79.6 360 -35 235 79.0 361 -35 245 82.4 362 -35 255 76.6 363 -35 265 80.3 364 -35 275 80.1 365 -35 285 77.8 367 -35 305 63.5 368 -35 315 69.9 369 -35 325 73.1 370 -35 335 73.1 371 -35 345 71.7 372 -35 355 72.1 373 -45 5 75.8 374 -45 15 75.6 375 -45 25 73.5 376 -45 35 76.8 377 -45 45 74.5 378 -45 55 76.7 379 -45 65 77.5 380 -45 75 77.0 381 -45 85 78.6 382 -45 95 81.8 383 -45 105 78.5 384 -45 115 80.5 385 -45 125 80.0 386 -45 135 75.9 387 -45 145 68.1 388 -45 155 73.8 389 -45 165 79.5 390 -45 175 71.7 391 -45 185 77.6 392 -45 195 79.2 393 -45 205 78.9 394 -45 215 84.9 395 -45 225 88.3 396 -45 235 90.0 397 -45 245 84.2 399 -45 265 82.6 400 -45 275 82.0 401 -45 285 79.8 402 -45 295 60.5 403 -45 305 64.8 404 -45 315 72.4 405 -45 325 73.2 406 -45 335 72.8 407 -45 345 71.4 408 -45 355 80.7 409 -55 10 81.5 410 -55 30 81.7 411 -55 50 81.9 412 -55 70 79.1 413 -55 90 80.8 414 -55 110 80.1 415 -55 130 79.3 416 -55 150 84.5 417 -55 170 81.2 418 -55 190 79.3 419 -55 210 82.0 420 -55 230 85.8 421 -55 250 83.3 422 -55 270 79.5 423 -55 290 71.0 424 -55 310 74.7 425 -55 330 79.5 426 -55 350 83.6 427 -65 10 77.6 428 -65 30 56.7 429 -65 50 70.6 430 -65 70 80.2 431 -65 90 84.1 432 -65 110 75.7 433 -65 130 77.5 434 -65 150 79.8 435 -65 170 81.4 436 -65 190 77.3 437 -65 210 81.8 438 -65 230 86.8 439 -65 250 82.7 440 -65 270 85.6 441 -65 290 73.3 442 -65 310 79.7 443 -65 330 84.9 444 -65 350 80.9 449 -75 180 62.0 450 -75 220 80.4 451 -75 260 71.0 452 -75 300 76.5 453 -75 340 74.2