Stratocumulus Average Cloud Amount (%) December, January, February (1954 - 1997) Night, Ship Observations Only Global Average: 23.3 Zonal Averages 17 zones Lat.N Average 85 8.5 75 16.6 65 30.7 55 30.0 45 29.1 35 26.2 25 21.7 15 14.8 5 15.6 -5 15.2 -15 18.9 -25 21.8 -35 28.6 -45 31.7 -55 32.9 -65 33.6 -75 33.0 Grid Box Averages 385 filled boxes Box # Lat.N Lon.E Average 1 85 60 7.7 2 85 180 9.5 3 85 300 8.2 4 75 20 27.0 5 75 60 25.1 7 75 140 5.9 8 75 180 9.5 9 75 220 11.5 12 75 340 22.0 13 65 10 22.8 14 65 30 23.7 15 65 50 19.4 21 65 170 45.8 22 65 190 44.9 23 65 210 15.3 27 65 290 33.2 29 65 330 28.2 30 65 350 27.6 31 55 10 23.3 32 55 30 29.8 38 55 150 29.1 39 55 170 34.1 40 55 190 33.6 41 55 210 29.5 42 55 230 26.7 46 55 310 29.9 47 55 330 27.8 48 55 350 30.5 49 45 5 17.1 50 45 15 20.7 51 45 25 25.7 52 45 35 26.6 53 45 45 21.2 54 45 55 26.7 62 45 135 20.4 63 45 145 27.8 64 45 155 34.4 65 45 165 32.2 66 45 175 30.2 67 45 185 29.8 68 45 195 27.1 69 45 205 27.9 70 45 215 28.6 71 45 225 31.8 72 45 235 26.5 77 45 285 20.7 78 45 295 29.7 79 45 305 32.0 80 45 315 31.9 81 45 325 27.5 82 45 335 28.9 83 45 345 30.9 84 45 355 25.7 85 35 5 16.0 86 35 15 15.8 87 35 25 15.9 88 35 35 13.0 90 35 55 15.1 96 35 115 4.9 97 35 125 23.0 98 35 135 23.1 99 35 145 28.3 100 35 155 30.4 101 35 165 28.9 102 35 175 28.1 103 35 185 28.6 104 35 195 27.9 105 35 205 28.4 106 35 215 31.3 107 35 225 36.8 108 35 235 27.6 109 35 245 16.1 112 35 275 18.9 113 35 285 23.8 114 35 295 27.6 115 35 305 24.5 116 35 315 23.1 117 35 325 25.1 118 35 335 27.3 119 35 345 26.1 120 35 355 15.4 124 25 35 4.4 125 25 45 9.5 126 25 55 5.7 127 25 65 3.6 128 25 75 2.4 129 25 85 6.8 130 25 95 4.8 131 25 105 31.4 132 25 115 28.1 133 25 125 31.2 134 25 135 30.1 135 25 145 25.2 136 25 155 23.6 137 25 165 22.6 138 25 175 22.6 139 25 185 23.3 140 25 195 20.9 141 25 205 20.4 142 25 215 26.6 143 25 225 36.0 144 25 235 39.5 145 25 245 17.1 146 25 255 12.5 147 25 265 22.1 148 25 275 18.6 149 25 285 16.7 150 25 295 14.7 151 25 305 14.2 152 25 315 16.6 153 25 325 18.0 154 25 335 17.9 155 25 345 11.3 160 15 35 8.3 161 15 45 6.0 162 15 55 7.1 163 15 65 6.9 164 15 75 3.7 165 15 85 8.1 166 15 95 6.1 167 15 105 24.4 168 15 115 18.2 169 15 125 19.7 170 15 135 17.4 171 15 145 16.9 172 15 155 12.4 173 15 165 12.2 174 15 175 13.7 175 15 185 14.6 176 15 195 14.4 177 15 205 16.4 178 15 215 21.5 179 15 225 29.9 180 15 235 36.4 181 15 245 25.1 182 15 255 9.2 183 15 265 5.3 184 15 275 10.0 185 15 285 8.9 186 15 295 8.3 187 15 305 9.1 188 15 315 12.7 189 15 325 19.6 190 15 335 14.1 191 15 345 6.5 193 5 5 11.4 197 5 45 7.2 198 5 55 10.1 199 5 65 7.7 200 5 75 8.4 201 5 85 11.8 202 5 95 12.4 203 5 105 16.7 204 5 115 16.7 205 5 125 14.7 206 5 135 10.3 207 5 145 17.3 208 5 155 15.8 209 5 165 12.5 210 5 175 13.9 211 5 185 13.8 212 5 195 14.4 213 5 205 17.0 214 5 215 20.3 215 5 225 25.6 216 5 235 24.3 217 5 245 24.3 218 5 255 21.1 219 5 265 19.5 220 5 275 15.1 221 5 285 14.0 223 5 305 13.1 224 5 315 17.3 225 5 325 16.6 226 5 335 18.4 227 5 345 9.7 228 5 355 12.4 229 -5 5 24.9 230 -5 15 21.6 232 -5 35 10.8 233 -5 45 7.5 234 -5 55 10.8 235 -5 65 10.0 236 -5 75 10.9 237 -5 85 11.2 238 -5 95 14.4 239 -5 105 14.7 240 -5 115 16.2 241 -5 125 11.8 242 -5 135 12.4 243 -5 145 15.7 244 -5 155 16.9 245 -5 165 15.9 246 -5 175 11.7 247 -5 185 10.0 248 -5 195 10.7 249 -5 205 10.4 250 -5 215 9.7 251 -5 225 8.8 252 -5 235 8.7 253 -5 245 15.3 254 -5 255 27.3 255 -5 265 33.8 256 -5 275 28.3 257 -5 285 16.6 260 -5 315 12.8 261 -5 325 8.7 262 -5 335 12.3 263 -5 345 21.9 264 -5 355 28.3 265 -15 5 54.0 266 -15 15 30.5 268 -15 35 10.5 269 -15 45 9.9 270 -15 55 8.4 271 -15 65 10.1 272 -15 75 14.2 273 -15 85 13.8 274 -15 95 18.5 275 -15 105 20.8 276 -15 115 11.5 277 -15 125 11.1 278 -15 135 10.4 279 -15 145 15.2 280 -15 155 13.0 281 -15 165 14.6 282 -15 175 13.2 283 -15 185 11.5 284 -15 195 13.1 285 -15 205 13.6 286 -15 215 12.3 287 -15 225 9.5 288 -15 235 10.3 289 -15 245 11.9 290 -15 255 29.2 291 -15 265 37.6 292 -15 275 39.4 293 -15 285 26.0 297 -15 325 8.8 298 -15 335 16.3 299 -15 345 30.4 300 -15 355 45.0 301 -25 5 50.9 302 -25 15 27.8 304 -25 35 12.8 305 -25 45 14.7 306 -25 55 12.4 307 -25 65 15.1 308 -25 75 18.2 309 -25 85 22.8 310 -25 95 35.8 311 -25 105 33.8 312 -25 115 16.7 315 -25 145 10.8 316 -25 155 13.9 317 -25 165 17.0 318 -25 175 16.0 319 -25 185 17.4 320 -25 195 19.8 321 -25 205 19.8 322 -25 215 18.7 323 -25 225 11.6 324 -25 235 10.7 325 -25 245 12.8 326 -25 255 21.1 327 -25 265 29.0 328 -25 275 42.5 329 -25 285 44.3 332 -25 315 14.7 333 -25 325 12.3 334 -25 335 13.7 335 -25 345 18.7 336 -25 355 31.1 337 -35 5 36.1 338 -35 15 20.3 339 -35 25 21.2 340 -35 35 22.6 341 -35 45 22.8 342 -35 55 26.9 343 -35 65 29.9 344 -35 75 32.1 345 -35 85 34.8 346 -35 95 41.2 347 -35 105 39.0 348 -35 115 24.4 349 -35 125 33.8 350 -35 135 29.7 351 -35 145 21.6 352 -35 155 23.0 353 -35 165 28.7 354 -35 175 21.1 355 -35 185 24.8 356 -35 195 24.3 357 -35 205 26.4 358 -35 215 30.1 359 -35 225 29.6 360 -35 235 27.9 361 -35 245 27.9 362 -35 255 29.1 363 -35 265 40.2 364 -35 275 41.4 365 -35 285 35.4 367 -35 305 16.1 368 -35 315 19.0 369 -35 325 22.8 370 -35 335 26.5 371 -35 345 27.2 372 -35 355 29.6 373 -45 5 27.6 374 -45 15 33.2 375 -45 25 27.6 376 -45 35 25.8 377 -45 45 27.5 378 -45 55 27.9 379 -45 65 31.3 380 -45 75 34.9 381 -45 85 33.7 382 -45 95 32.8 383 -45 105 32.8 384 -45 115 36.6 385 -45 125 35.7 386 -45 135 37.6 387 -45 145 28.8 388 -45 155 29.6 389 -45 165 34.5 390 -45 175 28.7 391 -45 185 31.2 392 -45 195 29.3 393 -45 205 36.6 394 -45 215 37.7 395 -45 225 37.6 396 -45 235 37.8 397 -45 245 40.4 398 -45 255 30.0 399 -45 265 36.9 400 -45 275 40.4 401 -45 285 36.5 402 -45 295 18.0 403 -45 305 18.8 404 -45 315 23.9 405 -45 325 31.1 406 -45 335 26.8 407 -45 345 27.2 408 -45 355 29.2 409 -55 10 31.1 410 -55 30 29.9 411 -55 50 31.5 412 -55 70 31.5 413 -55 90 30.1 414 -55 110 34.2 415 -55 130 37.2 416 -55 150 38.3 417 -55 170 41.6 418 -55 190 28.4 419 -55 210 30.1 420 -55 230 37.9 421 -55 250 33.4 422 -55 270 30.1 423 -55 290 28.9 424 -55 310 32.2 425 -55 330 35.3 426 -55 350 29.5 427 -65 10 37.3 428 -65 30 23.6 429 -65 50 30.5 430 -65 70 43.5 431 -65 90 44.3 432 -65 110 36.0 433 -65 130 33.6 434 -65 150 32.5 435 -65 170 32.6 436 -65 190 22.2 437 -65 210 24.3 438 -65 230 29.0 439 -65 250 27.3 440 -65 270 38.4 441 -65 290 32.8 442 -65 310 35.6 443 -65 330 43.7 444 -65 350 42.5 449 -75 180 29.5 450 -75 220 26.8 451 -75 260 33.7 452 -75 300 39.8 453 -75 340 40.0