Stratocumulus Average Cloud Amount (%) October (1954 - 1997) Night, Ship Observations Only Global Average: 24.5 Zonal Averages 16 zones Lat.N Average 85 27.9 75 28.9 65 33.8 55 31.3 45 28.8 35 23.0 25 15.8 15 12.8 5 16.3 -5 18.1 -15 24.2 -25 28.6 -35 31.1 -45 29.3 -55 35.4 -65 32.3 Grid Box Averages 330 filled boxes Box # Lat.N Lon.E Average 1 85 60 27.9 2 85 180 30.6 3 85 300 23.7 4 75 20 30.4 5 75 60 32.9 6 75 100 25.2 7 75 140 26.7 8 75 180 23.2 9 75 220 26.6 10 75 260 37.3 11 75 300 29.7 12 75 340 35.2 13 65 10 26.4 14 65 30 31.9 15 65 50 32.5 21 65 170 47.2 22 65 190 50.9 23 65 210 11.9 26 65 270 37.6 27 65 290 38.1 28 65 310 26.4 29 65 330 26.4 30 65 350 31.1 31 55 10 22.1 32 55 30 25.0 38 55 150 29.1 39 55 170 34.2 40 55 190 36.1 41 55 210 29.1 42 55 230 24.1 44 55 270 45.8 45 55 290 31.3 46 55 310 31.2 47 55 330 31.2 48 55 350 29.7 49 45 5 12.4 50 45 15 8.8 51 45 25 15.7 52 45 35 16.6 53 45 45 17.4 54 45 55 16.4 62 45 135 14.8 63 45 145 22.3 64 45 155 32.0 65 45 165 33.6 66 45 175 33.6 67 45 185 32.4 68 45 195 31.4 69 45 205 30.7 70 45 215 31.4 71 45 225 32.9 72 45 235 24.9 77 45 285 12.8 78 45 295 21.2 79 45 305 27.8 80 45 315 31.4 81 45 325 29.9 82 45 335 30.3 83 45 345 31.5 84 45 355 24.1 85 35 5 12.5 86 35 15 10.5 87 35 25 7.2 88 35 35 4.2 97 35 125 17.3 98 35 135 17.4 99 35 145 23.8 100 35 155 28.7 101 35 165 28.1 102 35 175 29.9 103 35 185 28.9 104 35 195 28.1 105 35 205 27.7 106 35 215 28.9 107 35 225 38.5 108 35 235 30.6 109 35 245 27.1 112 35 275 12.3 113 35 285 16.2 114 35 295 18.6 115 35 305 17.6 116 35 315 17.1 117 35 325 18.1 118 35 335 23.6 119 35 345 19.9 120 35 355 11.7 124 25 35 1.9 125 25 45 1.1 126 25 55 0.9 127 25 65 2.2 129 25 85 10.4 132 25 115 19.6 133 25 125 19.5 134 25 135 16.9 135 25 145 12.6 136 25 155 13.1 137 25 165 15.1 138 25 175 16.9 139 25 185 14.7 140 25 195 13.5 141 25 205 14.7 142 25 215 20.7 143 25 225 35.0 144 25 235 45.3 145 25 245 19.6 146 25 255 8.8 147 25 265 11.7 148 25 275 11.2 149 25 285 11.8 150 25 295 9.9 151 25 305 9.6 152 25 315 10.0 153 25 325 11.5 154 25 335 13.2 155 25 345 9.7 160 15 35 1.6 161 15 45 2.6 162 15 55 4.6 163 15 65 4.7 164 15 75 9.5 165 15 85 8.8 166 15 95 9.4 167 15 105 13.0 168 15 115 14.4 169 15 125 16.2 170 15 135 12.4 171 15 145 13.1 172 15 155 13.1 173 15 165 10.7 174 15 175 11.3 175 15 185 10.0 176 15 195 12.0 177 15 205 15.5 178 15 215 18.8 179 15 225 22.9 180 15 235 30.9 181 15 245 20.1 182 15 255 11.9 183 15 265 13.4 184 15 275 12.0 185 15 285 8.3 186 15 295 7.9 187 15 305 7.7 188 15 315 10.1 189 15 325 13.3 190 15 335 12.7 191 15 345 7.9 193 5 5 20.1 197 5 45 5.2 198 5 55 5.7 199 5 65 7.8 200 5 75 11.1 201 5 85 12.5 202 5 95 15.4 203 5 105 14.4 204 5 115 13.1 205 5 125 15.2 206 5 135 12.1 207 5 145 17.3 208 5 155 15.9 209 5 165 10.0 210 5 175 10.3 211 5 185 10.3 212 5 195 11.3 213 5 205 13.3 214 5 215 19.1 215 5 225 17.1 216 5 235 23.6 217 5 245 28.4 218 5 255 35.4 219 5 265 34.8 220 5 275 26.3 221 5 285 21.9 223 5 305 7.6 224 5 315 8.7 225 5 325 12.1 226 5 335 15.8 227 5 345 19.9 228 5 355 26.3 229 -5 5 47.4 230 -5 15 35.1 233 -5 45 6.5 234 -5 55 10.6 235 -5 65 12.4 236 -5 75 14.4 237 -5 85 12.8 238 -5 95 13.1 239 -5 105 13.1 240 -5 115 6.1 241 -5 125 5.8 242 -5 135 7.4 243 -5 145 12.5 244 -5 155 16.3 245 -5 165 13.1 246 -5 175 8.7 247 -5 185 5.7 248 -5 195 7.0 249 -5 205 9.1 250 -5 215 5.6 251 -5 225 5.9 252 -5 235 8.9 253 -5 245 17.8 254 -5 255 36.1 255 -5 265 51.4 256 -5 275 50.2 257 -5 285 41.3 260 -5 315 6.2 261 -5 325 6.8 262 -5 335 13.4 263 -5 345 36.6 264 -5 355 51.5 265 -15 5 68.3 266 -15 15 34.3 268 -15 35 6.3 269 -15 45 5.9 270 -15 55 15.3 271 -15 65 14.7 272 -15 75 19.4 273 -15 85 20.1 274 -15 95 18.9 275 -15 105 14.5 276 -15 115 3.5 277 -15 125 3.5 278 -15 135 4.1 279 -15 145 11.2 280 -15 155 13.1 281 -15 165 16.5 282 -15 175 18.8 283 -15 185 16.2 284 -15 195 13.6 285 -15 205 17.4 286 -15 215 17.3 287 -15 225 10.7 288 -15 235 7.9 289 -15 245 19.6 290 -15 255 34.8 291 -15 265 47.4 292 -15 275 69.5 293 -15 285 56.9 297 -15 325 11.0 298 -15 335 21.7 299 -15 345 45.1 300 -15 355 65.9 301 -25 5 54.8 302 -25 15 29.6 304 -25 35 18.3 305 -25 45 19.2 306 -25 55 18.0 307 -25 65 24.6 308 -25 75 31.9 309 -25 85 33.9 310 -25 95 40.4 311 -25 105 32.2 312 -25 115 12.5 316 -25 155 12.3 317 -25 165 22.0 318 -25 175 22.3 319 -25 185 22.5 320 -25 195 26.1 321 -25 205 26.3 322 -25 215 24.7 323 -25 225 23.0 324 -25 235 16.4 325 -25 245 16.5 326 -25 255 29.3 327 -25 265 43.1 328 -25 275 46.4 329 -25 285 51.9 332 -25 315 18.0 333 -25 325 19.5 334 -25 335 29.2 335 -25 345 30.1 336 -25 355 41.3 337 -35 5 43.3 338 -35 15 26.9 339 -35 25 23.2 340 -35 35 27.4 341 -35 45 30.0 342 -35 55 28.2 343 -35 65 36.5 344 -35 75 41.3 345 -35 85 40.2 346 -35 95 36.5 347 -35 105 39.5 348 -35 115 24.0 349 -35 125 27.0 350 -35 135 26.9 351 -35 145 21.3 352 -35 155 23.8 353 -35 165 29.6 354 -35 175 25.4 355 -35 185 28.1 356 -35 195 31.6 357 -35 205 29.8 358 -35 215 31.1 359 -35 225 23.6 363 -35 265 43.1 364 -35 275 37.1 365 -35 285 40.1 367 -35 305 16.5 368 -35 315 17.6 369 -35 325 26.1 370 -35 335 29.8 371 -35 345 30.4 372 -35 355 36.1 379 -45 65 21.6 380 -45 75 21.3 387 -45 145 19.4 388 -45 155 29.7 389 -45 165 34.5 390 -45 175 28.1 391 -45 185 34.3 392 -45 195 38.1 393 -45 205 43.2 400 -45 275 39.3 401 -45 285 32.2 402 -45 295 22.7 403 -45 305 17.8 404 -45 315 29.9 408 -45 355 25.4 416 -55 150 43.0 417 -55 170 53.8 421 -55 250 33.5 422 -55 270 31.2 423 -55 290 28.2 424 -55 310 31.9 425 -55 330 24.9 432 -65 110 24.0 433 -65 130 16.7 442 -65 310 47.7