Stratocumulus Amount-When-Present (%) March, April, May (1954 - 1997) Day, Ship Observations Only Global Average: 70.3 Zonal Averages 17 zones Lat.N Average 85 82.0 75 79.4 65 77.8 55 78.8 45 78.6 35 73.6 25 67.9 15 63.1 5 64.5 -5 61.6 -15 64.8 -25 66.8 -35 71.3 -45 76.7 -55 79.4 -65 80.6 -75 77.0 Grid Box Averages 388 filled boxes Box # Lat.N Lon.E Average 1 85 60 80.5 2 85 180 85.2 3 85 300 80.1 4 75 20 81.5 5 75 60 82.5 6 75 100 85.9 7 75 140 81.5 8 75 180 83.6 9 75 220 82.0 11 75 300 58.8 12 75 340 71.2 13 65 10 75.4 14 65 30 77.1 15 65 50 73.3 20 65 150 71.7 21 65 170 82.6 22 65 190 83.0 23 65 210 73.8 27 65 290 72.3 29 65 330 77.1 30 65 350 78.2 31 55 10 72.9 32 55 30 73.5 37 55 130 76.6 38 55 150 79.5 39 55 170 81.9 40 55 190 81.8 41 55 210 78.8 42 55 230 77.8 45 55 290 74.6 46 55 310 81.5 47 55 330 78.0 48 55 350 71.2 49 45 5 62.0 50 45 15 61.0 51 45 25 76.1 52 45 35 79.0 53 45 45 75.1 54 45 55 74.6 62 45 135 78.5 63 45 145 78.2 64 45 155 81.9 65 45 165 81.9 66 45 175 81.9 67 45 185 81.1 68 45 195 80.7 69 45 205 80.3 70 45 215 79.9 71 45 225 78.1 72 45 235 74.8 77 45 285 75.1 78 45 295 75.5 79 45 305 77.5 80 45 315 79.1 81 45 325 76.9 82 45 335 77.4 83 45 345 74.8 84 45 355 72.5 85 35 5 62.7 86 35 15 62.6 87 35 25 62.9 88 35 35 62.1 89 35 45 79.7 90 35 55 73.0 96 35 115 69.9 97 35 125 75.8 98 35 135 73.6 99 35 145 77.6 100 35 155 77.3 101 35 165 75.8 102 35 175 75.8 103 35 185 74.8 104 35 195 76.0 105 35 205 75.8 106 35 215 76.4 107 35 225 76.6 108 35 235 74.4 109 35 245 71.1 112 35 275 59.3 113 35 285 68.6 114 35 295 72.7 115 35 305 71.8 116 35 315 69.5 117 35 325 69.6 118 35 335 71.6 119 35 345 71.3 120 35 355 61.8 124 25 35 56.9 125 25 45 63.6 126 25 55 55.6 127 25 65 48.2 129 25 85 51.1 130 25 95 48.9 131 25 105 81.2 132 25 115 76.3 133 25 125 73.8 134 25 135 71.2 135 25 145 67.7 136 25 155 67.3 137 25 165 66.4 138 25 175 65.6 139 25 185 65.9 140 25 195 65.4 141 25 205 64.2 142 25 215 69.7 143 25 225 75.4 144 25 235 78.9 145 25 245 69.5 146 25 255 53.1 147 25 265 64.2 148 25 275 58.2 149 25 285 59.9 150 25 295 62.6 151 25 305 62.4 152 25 315 61.4 153 25 325 63.3 154 25 335 67.3 155 25 345 62.5 160 15 35 56.7 161 15 45 51.9 162 15 55 46.1 163 15 65 46.2 164 15 75 49.2 165 15 85 49.8 166 15 95 48.9 167 15 105 66.4 168 15 115 56.0 169 15 125 58.8 170 15 135 60.0 171 15 145 59.6 172 15 155 58.6 173 15 165 59.2 174 15 175 59.9 175 15 185 60.2 176 15 195 62.6 177 15 205 61.6 178 15 215 66.3 179 15 225 72.9 180 15 235 77.8 181 15 245 72.0 182 15 255 52.8 183 15 265 51.4 184 15 275 54.9 185 15 285 58.6 186 15 295 55.0 187 15 305 57.9 188 15 315 58.7 189 15 325 65.4 190 15 335 66.1 191 15 345 62.1 193 5 5 65.9 197 5 45 48.0 198 5 55 53.4 199 5 65 55.0 200 5 75 57.0 201 5 85 59.2 202 5 95 60.7 203 5 105 56.1 204 5 115 56.8 205 5 125 61.0 206 5 135 62.1 207 5 145 68.5 208 5 155 68.9 209 5 165 63.9 210 5 175 64.5 211 5 185 64.3 212 5 195 64.2 213 5 205 65.2 214 5 215 69.5 215 5 225 69.5 216 5 235 71.4 217 5 245 66.2 218 5 255 60.5 219 5 265 61.6 220 5 275 63.7 221 5 285 67.9 223 5 305 62.2 224 5 315 65.3 225 5 325 66.8 226 5 335 67.8 227 5 345 66.9 228 5 355 64.2 229 -5 5 66.0 230 -5 15 70.0 232 -5 35 61.0 233 -5 45 54.8 234 -5 55 54.5 235 -5 65 56.9 236 -5 75 60.8 237 -5 85 60.8 238 -5 95 65.0 239 -5 105 61.4 240 -5 115 55.8 241 -5 125 55.3 242 -5 135 61.6 243 -5 145 63.8 244 -5 155 68.6 245 -5 165 65.2 246 -5 175 64.3 247 -5 185 56.6 248 -5 195 58.0 249 -5 205 56.7 250 -5 215 60.7 251 -5 225 60.6 252 -5 235 61.7 253 -5 245 64.3 254 -5 255 63.1 255 -5 265 65.1 256 -5 275 62.9 257 -5 285 70.8 260 -5 315 62.5 261 -5 325 61.9 262 -5 335 60.6 263 -5 345 57.6 264 -5 355 62.4 265 -15 5 76.2 266 -15 15 75.4 268 -15 35 57.2 269 -15 45 56.4 270 -15 55 58.3 271 -15 65 57.9 272 -15 75 62.1 273 -15 85 63.5 274 -15 95 64.4 275 -15 105 61.2 276 -15 115 54.6 277 -15 125 50.5 278 -15 135 60.4 279 -15 145 61.7 280 -15 155 66.0 281 -15 165 66.8 282 -15 175 65.4 283 -15 185 64.2 284 -15 195 62.0 285 -15 205 58.4 286 -15 215 57.3 287 -15 225 57.9 288 -15 235 58.9 289 -15 245 57.9 290 -15 255 62.1 291 -15 265 67.6 292 -15 275 74.7 293 -15 285 76.8 297 -15 325 57.5 298 -15 335 55.0 299 -15 345 56.4 300 -15 355 70.1 301 -25 5 73.7 302 -25 15 71.4 304 -25 35 60.6 305 -25 45 61.0 306 -25 55 61.9 307 -25 65 65.2 308 -25 75 65.0 309 -25 85 67.6 310 -25 95 68.8 311 -25 105 68.2 312 -25 115 57.9 315 -25 145 61.3 316 -25 155 62.8 317 -25 165 62.2 318 -25 175 64.9 319 -25 185 64.2 320 -25 195 66.8 321 -25 205 64.9 322 -25 215 65.6 323 -25 225 63.0 324 -25 235 60.7 325 -25 245 62.1 326 -25 255 59.0 327 -25 265 65.9 328 -25 275 74.9 329 -25 285 83.5 332 -25 315 56.9 333 -25 325 60.1 334 -25 335 62.1 335 -25 345 61.4 336 -25 355 66.6 337 -35 5 72.9 338 -35 15 65.1 339 -35 25 62.7 340 -35 35 66.7 341 -35 45 67.8 342 -35 55 70.4 343 -35 65 72.3 344 -35 75 72.3 345 -35 85 74.6 346 -35 95 76.1 347 -35 105 75.6 348 -35 115 69.0 349 -35 125 72.4 350 -35 135 73.0 351 -35 145 68.3 352 -35 155 64.5 353 -35 165 68.1 354 -35 175 63.0 355 -35 185 67.7 356 -35 195 69.8 357 -35 205 70.8 358 -35 215 73.1 359 -35 225 73.8 360 -35 235 68.7 361 -35 245 73.7 362 -35 255 75.5 363 -35 265 75.8 364 -35 275 79.3 365 -35 285 76.7 367 -35 305 63.4 368 -35 315 67.7 369 -35 325 68.8 370 -35 335 70.0 371 -35 345 69.3 372 -35 355 69.1 373 -45 5 73.8 374 -45 15 78.4 375 -45 25 71.5 376 -45 35 71.7 377 -45 45 76.7 378 -45 55 80.9 379 -45 65 79.0 380 -45 75 78.2 381 -45 85 80.8 382 -45 95 76.2 383 -45 105 76.9 384 -45 115 81.4 385 -45 125 78.5 386 -45 135 74.1 387 -45 145 65.7 388 -45 155 74.0 389 -45 165 78.8 390 -45 175 65.8 391 -45 185 74.0 392 -45 195 77.3 393 -45 205 79.7 394 -45 215 78.8 395 -45 225 77.4 396 -45 235 81.1 397 -45 245 82.5 398 -45 255 80.6 399 -45 265 77.5 400 -45 275 82.1 401 -45 285 80.4 402 -45 295 68.0 403 -45 305 69.6 404 -45 315 74.7 405 -45 325 77.1 406 -45 335 76.6 407 -45 345 73.5 408 -45 355 75.5 409 -55 10 79.9 410 -55 30 79.3 411 -55 50 78.9 412 -55 70 81.3 413 -55 90 82.2 414 -55 110 78.4 415 -55 130 77.3 416 -55 150 79.4 417 -55 170 81.3 418 -55 190 79.9 419 -55 210 86.7 420 -55 230 82.1 421 -55 250 80.3 422 -55 270 76.9 423 -55 290 72.0 424 -55 310 72.6 425 -55 330 77.2 426 -55 350 84.2 427 -65 10 79.0 428 -65 30 78.6 429 -65 50 75.8 430 -65 70 84.5 431 -65 90 86.2 432 -65 110 79.7 433 -65 130 81.6 434 -65 150 82.5 435 -65 170 78.4 436 -65 190 83.9 437 -65 210 88.0 438 -65 230 78.8 439 -65 250 81.9 440 -65 270 79.2 441 -65 290 70.7 442 -65 310 81.0 443 -65 330 83.8 444 -65 350 78.9 449 -75 180 80.0 450 -75 220 82.8 453 -75 340 62.8