Stratocumulus Amount-When-Present (%) March, April, May (1954 - 1997) Night, Ship Observations Only Global Average: 73.3 Zonal Averages 17 zones Lat.N Average 85 80.3 75 80.2 65 79.2 55 80.1 45 80.3 35 75.8 25 71.1 15 66.0 5 66.8 -5 64.8 -15 69.9 -25 71.4 -35 75.4 -45 79.4 -55 81.6 -65 81.8 -75 79.9 Grid Box Averages 372 filled boxes Box # Lat.N Lon.E Average 1 85 60 75.8 2 85 180 87.6 3 85 300 78.4 4 75 20 82.0 5 75 60 84.3 7 75 140 79.1 8 75 180 85.8 9 75 220 85.0 11 75 300 57.4 12 75 340 74.0 13 65 10 75.9 14 65 30 78.4 15 65 50 72.1 20 65 150 74.6 21 65 170 85.0 22 65 190 84.6 23 65 210 67.9 29 65 330 77.6 30 65 350 78.5 31 55 10 72.5 32 55 30 70.0 37 55 130 71.7 38 55 150 80.0 39 55 170 83.7 40 55 190 82.9 41 55 210 80.2 42 55 230 79.2 46 55 310 84.2 47 55 330 79.3 48 55 350 72.1 49 45 5 63.2 50 45 15 60.3 51 45 25 68.5 52 45 35 76.4 53 45 45 75.8 54 45 55 66.4 62 45 135 76.5 63 45 145 78.7 64 45 155 84.0 65 45 165 84.3 66 45 175 83.4 67 45 185 82.3 68 45 195 81.8 69 45 205 82.7 70 45 215 82.6 71 45 225 80.5 72 45 235 76.5 77 45 285 73.3 78 45 295 74.7 79 45 305 79.6 80 45 315 80.0 81 45 325 80.3 82 45 335 80.1 83 45 345 76.8 84 45 355 74.0 85 35 5 64.9 86 35 15 60.1 87 35 25 60.4 88 35 35 61.4 97 35 125 74.2 98 35 135 71.8 99 35 145 77.1 100 35 155 78.8 101 35 165 78.2 102 35 175 78.5 103 35 185 78.0 104 35 195 77.2 105 35 205 79.7 106 35 215 80.0 107 35 225 80.1 108 35 235 76.7 109 35 245 73.1 112 35 275 60.5 113 35 285 66.0 114 35 295 72.5 115 35 305 74.3 116 35 315 72.3 117 35 325 74.5 118 35 335 75.7 119 35 345 75.3 120 35 355 63.1 124 25 35 57.5 125 25 45 67.4 126 25 55 59.9 127 25 65 53.5 129 25 85 48.0 131 25 105 86.1 132 25 115 77.2 133 25 125 73.4 134 25 135 71.5 135 25 145 69.0 136 25 155 70.7 137 25 165 70.1 138 25 175 68.6 139 25 185 68.4 140 25 195 67.5 141 25 205 68.6 142 25 215 75.4 143 25 225 80.0 144 25 235 82.3 145 25 245 74.7 146 25 255 61.3 147 25 265 62.9 148 25 275 57.9 149 25 285 59.8 150 25 295 64.5 151 25 305 66.3 152 25 315 66.2 153 25 325 68.5 154 25 335 72.9 155 25 345 69.4 160 15 35 58.5 161 15 45 56.7 162 15 55 51.8 163 15 65 48.4 164 15 75 55.6 165 15 85 51.9 166 15 95 48.8 167 15 105 67.1 168 15 115 57.2 169 15 125 58.4 170 15 135 62.6 171 15 145 62.3 172 15 155 59.7 173 15 165 61.4 174 15 175 61.7 175 15 185 62.9 176 15 195 63.6 177 15 205 67.1 178 15 215 71.8 179 15 225 76.3 180 15 235 80.5 181 15 245 74.9 182 15 255 57.9 183 15 265 53.3 184 15 275 56.7 185 15 285 59.5 186 15 295 58.2 187 15 305 62.0 188 15 315 63.7 189 15 325 69.2 190 15 335 69.9 191 15 345 64.9 193 5 5 65.0 197 5 45 50.7 198 5 55 55.1 199 5 65 54.4 200 5 75 58.0 201 5 85 58.4 202 5 95 60.4 203 5 105 55.8 204 5 115 55.6 205 5 125 63.6 206 5 135 64.9 207 5 145 69.9 208 5 155 69.5 209 5 165 66.2 210 5 175 66.6 211 5 185 65.8 212 5 195 67.3 213 5 205 70.7 214 5 215 73.7 215 5 225 71.2 216 5 235 68.1 217 5 245 70.7 218 5 255 68.0 219 5 265 65.0 220 5 275 65.7 221 5 285 63.6 223 5 305 65.5 224 5 315 69.2 225 5 325 70.9 226 5 335 72.5 227 5 345 67.1 228 5 355 64.8 229 -5 5 68.2 230 -5 15 61.7 233 -5 45 57.9 234 -5 55 61.6 235 -5 65 60.6 236 -5 75 62.1 237 -5 85 61.2 238 -5 95 62.9 239 -5 105 63.2 240 -5 115 56.8 241 -5 125 61.9 242 -5 135 63.3 243 -5 145 66.5 244 -5 155 70.9 245 -5 165 68.1 246 -5 175 54.8 247 -5 185 57.2 248 -5 195 59.6 249 -5 205 65.0 250 -5 215 62.2 251 -5 225 60.8 252 -5 235 65.1 253 -5 245 70.1 254 -5 255 68.8 255 -5 265 70.7 256 -5 275 71.9 257 -5 285 64.9 260 -5 315 62.7 261 -5 325 64.5 262 -5 335 64.0 263 -5 345 62.1 264 -5 355 68.0 265 -15 5 83.2 266 -15 15 76.7 268 -15 35 58.7 269 -15 45 59.1 270 -15 55 63.6 271 -15 65 63.9 272 -15 75 66.1 273 -15 85 62.5 274 -15 95 64.5 275 -15 105 65.0 276 -15 115 59.9 277 -15 125 59.3 278 -15 135 62.0 279 -15 145 65.1 280 -15 155 70.0 281 -15 165 67.1 282 -15 175 63.4 283 -15 185 63.7 284 -15 195 64.0 285 -15 205 63.6 286 -15 215 59.2 287 -15 225 61.9 288 -15 235 59.2 289 -15 245 66.3 290 -15 255 70.5 291 -15 265 77.6 292 -15 275 81.6 293 -15 285 76.4 297 -15 325 60.6 298 -15 335 60.6 299 -15 345 67.7 300 -15 355 78.2 301 -25 5 80.8 302 -25 15 74.6 304 -25 35 62.7 305 -25 45 63.2 306 -25 55 65.3 307 -25 65 75.0 308 -25 75 72.7 309 -25 85 71.5 310 -25 95 70.7 311 -25 105 72.2 312 -25 115 62.6 316 -25 155 66.8 317 -25 165 67.5 318 -25 175 66.8 319 -25 185 65.9 320 -25 195 68.6 321 -25 205 70.7 322 -25 215 68.6 323 -25 225 68.7 324 -25 235 64.8 325 -25 245 68.1 326 -25 255 63.0 327 -25 265 74.5 328 -25 275 79.7 329 -25 285 84.7 332 -25 315 57.7 333 -25 325 62.4 334 -25 335 67.6 335 -25 345 66.3 336 -25 355 73.9 337 -35 5 76.6 338 -35 15 67.5 339 -35 25 69.4 340 -35 35 71.5 341 -35 45 72.1 342 -35 55 76.7 343 -35 65 78.8 344 -35 75 79.5 345 -35 85 80.9 346 -35 95 79.9 347 -35 105 77.9 348 -35 115 71.9 349 -35 125 78.0 350 -35 135 78.0 351 -35 145 74.3 352 -35 155 69.4 353 -35 165 74.2 354 -35 175 65.9 355 -35 185 68.6 356 -35 195 71.1 357 -35 205 75.8 358 -35 215 81.1 359 -35 225 78.9 360 -35 235 71.2 362 -35 255 83.5 363 -35 265 74.7 364 -35 275 79.9 365 -35 285 78.0 367 -35 305 65.4 368 -35 315 67.2 369 -35 325 72.0 370 -35 335 76.0 371 -35 345 73.9 372 -35 355 73.7 373 -45 5 83.0 374 -45 15 77.4 375 -45 25 77.3 376 -45 35 72.6 377 -45 45 72.3 378 -45 55 81.4 379 -45 65 86.8 380 -45 75 78.9 381 -45 85 82.5 382 -45 95 83.7 383 -45 105 81.6 385 -45 125 83.1 386 -45 135 80.1 387 -45 145 74.0 388 -45 155 79.0 389 -45 165 81.2 390 -45 175 69.7 391 -45 185 78.8 392 -45 195 77.5 393 -45 205 81.1 394 -45 215 78.5 395 -45 225 76.2 396 -45 235 84.4 397 -45 245 84.7 398 -45 255 81.3 399 -45 265 78.7 400 -45 275 82.7 401 -45 285 81.2 402 -45 295 68.1 403 -45 305 74.0 404 -45 315 75.5 405 -45 325 77.3 409 -55 10 84.4 410 -55 30 79.5 411 -55 50 83.1 412 -55 70 81.0 413 -55 90 82.1 414 -55 110 81.5 415 -55 130 80.9 416 -55 150 83.1 417 -55 170 80.9 418 -55 190 85.0 419 -55 210 88.6 421 -55 250 83.1 422 -55 270 79.3 423 -55 290 76.2 424 -55 310 75.6 425 -55 330 77.7 426 -55 350 83.4 427 -65 10 81.0 428 -65 30 77.8 429 -65 50 73.7 430 -65 70 84.8 431 -65 90 84.5 432 -65 110 78.1 433 -65 130 79.2 434 -65 150 85.3 435 -65 170 84.7 436 -65 190 80.3 437 -65 210 87.6 438 -65 230 81.5 440 -65 270 79.8 441 -65 290 76.4 442 -65 310 82.0 443 -65 330 89.1 444 -65 350 81.5 449 -75 180 81.1 450 -75 220 87.1 453 -75 340 66.2