Stratocumulus Average Cloud Amount (%) August (1954 - 1997) Night, Ship Observations Only Global Average: 23.4 Zonal Averages 15 zones Lat.N Average 85 22.1 75 27.9 65 29.1 55 29.6 45 27.8 35 19.4 25 16.0 15 15.6 5 17.5 -5 18.0 -15 24.6 -25 26.5 -35 27.1 -45 29.5 -55 34.1 Grid Box Averages 319 filled boxes Box # Lat.N Lon.E Average 1 85 60 19.6 2 85 180 27.6 3 85 300 17.8 4 75 20 33.4 5 75 60 35.6 6 75 100 28.2 7 75 140 23.6 8 75 180 23.2 9 75 220 26.1 10 75 260 30.9 11 75 300 23.3 12 75 340 25.3 13 65 10 29.9 14 65 30 33.7 15 65 50 35.4 16 65 70 38.3 21 65 170 37.6 22 65 190 31.7 23 65 210 28.3 24 65 230 22.2 25 65 250 27.9 26 65 270 26.9 27 65 290 22.1 28 65 310 22.0 29 65 330 27.8 30 65 350 32.8 31 55 10 20.0 32 55 30 17.7 37 55 130 29.4 38 55 150 25.6 39 55 170 29.6 40 55 190 29.9 41 55 210 33.8 42 55 230 29.4 44 55 270 20.6 45 55 290 18.9 46 55 310 27.3 47 55 330 36.5 48 55 350 32.7 49 45 5 7.2 50 45 15 5.3 51 45 25 5.6 52 45 35 7.3 54 45 55 7.5 62 45 135 22.8 63 45 145 24.7 64 45 155 27.6 65 45 165 28.6 66 45 175 29.9 67 45 185 29.8 68 45 195 30.9 69 45 205 33.3 70 45 215 38.4 71 45 225 42.7 72 45 235 28.9 77 45 285 11.9 78 45 295 12.6 79 45 305 17.4 80 45 315 24.3 81 45 325 27.4 82 45 335 32.0 83 45 345 32.2 84 45 355 22.4 85 35 5 8.1 86 35 15 3.5 87 35 25 1.6 88 35 35 5.0 97 35 125 13.3 98 35 135 11.7 99 35 145 19.9 100 35 155 23.2 101 35 165 20.6 102 35 175 19.9 103 35 185 19.1 104 35 195 20.4 105 35 205 27.0 106 35 215 32.4 107 35 225 45.5 108 35 235 36.5 109 35 245 34.3 112 35 275 7.8 113 35 285 11.1 114 35 295 12.3 115 35 305 9.5 116 35 315 7.6 117 35 325 12.0 118 35 335 20.5 119 35 345 28.2 120 35 355 10.9 124 25 35 1.9 125 25 45 0.0 126 25 55 5.4 127 25 65 29.0 129 25 85 21.6 132 25 115 12.8 133 25 125 11.2 134 25 135 9.7 135 25 145 12.6 136 25 155 8.9 137 25 165 9.9 138 25 175 8.7 139 25 185 8.1 140 25 195 9.5 141 25 205 15.5 142 25 215 28.9 143 25 225 45.5 144 25 235 52.9 145 25 245 24.6 146 25 255 11.4 147 25 265 7.1 148 25 275 6.2 149 25 285 8.1 150 25 295 6.5 151 25 305 5.7 152 25 315 8.8 153 25 325 14.4 154 25 335 26.6 155 25 345 20.0 160 15 35 7.3 161 15 45 9.6 162 15 55 9.7 163 15 65 22.1 164 15 75 19.3 165 15 85 15.5 166 15 95 13.8 167 15 105 12.1 168 15 115 16.1 169 15 125 17.3 170 15 135 16.3 171 15 145 16.8 172 15 155 13.2 173 15 165 7.7 174 15 175 9.4 175 15 185 8.1 176 15 195 10.1 177 15 205 16.0 178 15 215 21.9 179 15 225 30.2 180 15 235 29.3 181 15 245 16.8 182 15 255 15.0 183 15 265 14.9 184 15 275 10.8 185 15 285 10.5 186 15 295 7.2 187 15 305 8.3 188 15 315 13.3 189 15 325 22.4 190 15 335 23.4 191 15 345 16.4 193 5 5 28.0 197 5 45 10.3 198 5 55 8.0 199 5 65 8.3 200 5 75 10.5 201 5 85 12.8 202 5 95 15.7 203 5 105 14.9 204 5 115 14.8 205 5 125 17.7 206 5 135 14.7 207 5 145 18.3 208 5 155 17.6 209 5 165 12.6 210 5 175 8.1 211 5 185 12.6 212 5 195 12.2 213 5 205 16.1 214 5 215 21.1 215 5 225 22.0 216 5 235 18.5 217 5 245 26.2 218 5 255 32.7 219 5 265 33.7 220 5 275 25.3 221 5 285 23.5 223 5 305 10.4 224 5 315 12.2 225 5 325 12.5 226 5 335 16.8 227 5 345 26.1 228 5 355 33.5 229 -5 5 43.5 230 -5 15 42.2 233 -5 45 10.9 234 -5 55 13.6 235 -5 65 14.7 236 -5 75 12.5 237 -5 85 14.7 238 -5 95 13.9 239 -5 105 13.7 240 -5 115 6.5 241 -5 125 8.0 242 -5 135 12.7 243 -5 145 13.0 244 -5 155 19.8 245 -5 165 13.5 246 -5 175 9.1 247 -5 185 9.1 248 -5 195 10.1 249 -5 205 7.6 250 -5 215 8.0 251 -5 225 7.2 252 -5 235 9.4 253 -5 245 15.4 254 -5 255 33.9 255 -5 265 50.7 256 -5 275 53.2 260 -5 315 5.0 261 -5 325 9.1 262 -5 335 10.0 263 -5 345 21.7 264 -5 355 42.3 265 -15 5 68.3 266 -15 15 35.6 268 -15 35 4.9 269 -15 45 6.6 270 -15 55 13.6 271 -15 65 17.6 272 -15 75 20.8 273 -15 85 23.1 274 -15 95 20.4 275 -15 105 16.7 276 -15 115 7.2 277 -15 125 1.3 278 -15 135 9.3 279 -15 145 14.6 280 -15 155 19.6 281 -15 165 17.8 282 -15 175 22.6 283 -15 185 17.8 284 -15 195 20.4 285 -15 205 16.9 286 -15 215 13.2 287 -15 225 11.8 288 -15 235 13.8 289 -15 245 21.1 290 -15 255 33.9 291 -15 265 40.8 292 -15 275 64.6 293 -15 285 56.9 297 -15 325 10.0 298 -15 335 21.2 299 -15 345 30.8 300 -15 355 66.3 301 -25 5 50.0 302 -25 15 22.4 304 -25 35 10.5 305 -25 45 16.4 306 -25 55 17.0 307 -25 65 27.6 308 -25 75 27.5 309 -25 85 33.1 310 -25 95 32.1 311 -25 105 24.6 312 -25 115 12.8 316 -25 155 8.9 317 -25 165 17.9 318 -25 175 22.4 319 -25 185 23.2 320 -25 195 20.2 321 -25 205 26.0 322 -25 215 28.2 323 -25 225 24.1 324 -25 235 22.6 325 -25 245 18.5 328 -25 275 50.7 329 -25 285 50.3 332 -25 315 15.0 333 -25 325 17.8 334 -25 335 24.7 335 -25 345 31.2 336 -25 355 41.5 337 -35 5 36.4 338 -35 15 19.5 339 -35 25 13.6 340 -35 35 18.0 341 -35 45 30.5 342 -35 55 27.8 343 -35 65 37.2 344 -35 75 36.8 345 -35 85 36.9 346 -35 95 35.0 347 -35 105 36.1 348 -35 115 21.1 349 -35 125 20.7 350 -35 135 25.3 351 -35 145 23.8 352 -35 155 14.7 353 -35 165 20.1 354 -35 175 20.6 355 -35 185 22.9 356 -35 195 20.4 357 -35 205 23.7 358 -35 215 27.9 359 -35 225 28.7 364 -35 275 37.5 365 -35 285 33.0 367 -35 305 15.0 368 -35 315 24.1 369 -35 325 32.9 370 -35 335 27.1 371 -35 345 19.6 372 -35 355 33.1 387 -45 145 23.9 388 -45 155 23.4 389 -45 165 18.8 390 -45 175 28.8 391 -45 185 33.4 392 -45 195 40.0 400 -45 275 42.2 401 -45 285 39.3 402 -45 295 21.4 403 -45 305 26.0 404 -45 315 26.5 417 -55 170 44.1 423 -55 290 31.9 424 -55 310 33.4 425 -55 330 26.5