Stratocumulus Average Cloud Amount (%) July (1954 - 1997) Night, Ship Observations Only Global Average: 23.3 Zonal Averages 15 zones Lat.N Average 85 16.2 75 22.8 65 28.4 55 28.8 45 27.0 35 23.6 25 17.7 15 17.0 5 16.7 -5 16.1 -15 23.0 -25 25.1 -35 25.1 -45 30.6 -55 37.5 Grid Box Averages 321 filled boxes Box # Lat.N Lon.E Average 1 85 60 15.5 2 85 180 20.1 3 85 300 11.4 4 75 20 33.9 5 75 60 31.5 6 75 100 21.0 7 75 140 14.9 8 75 180 17.7 9 75 220 16.6 10 75 260 26.3 11 75 300 13.9 12 75 340 25.6 13 65 10 33.0 14 65 30 32.7 15 65 50 28.8 16 65 70 14.9 20 65 150 18.3 21 65 170 33.1 22 65 190 28.8 23 65 210 29.9 25 65 250 16.2 26 65 270 21.8 27 65 290 21.5 28 65 310 18.8 29 65 330 30.5 30 65 350 34.9 31 55 10 21.4 32 55 30 17.0 37 55 130 26.3 38 55 150 21.9 39 55 170 26.4 40 55 190 29.3 41 55 210 34.6 42 55 230 35.4 44 55 270 13.2 45 55 290 22.0 46 55 310 25.2 47 55 330 35.8 48 55 350 35.6 49 45 5 6.3 50 45 15 4.6 51 45 25 6.5 52 45 35 7.4 62 45 135 22.4 63 45 145 22.7 64 45 155 23.6 65 45 165 21.7 66 45 175 23.4 67 45 185 26.4 68 45 195 30.4 69 45 205 34.1 70 45 215 39.0 71 45 225 44.3 72 45 235 33.6 77 45 285 12.7 78 45 295 12.7 79 45 305 15.9 80 45 315 20.1 81 45 325 31.0 82 45 335 35.3 83 45 345 36.2 84 45 355 23.5 85 35 5 7.6 86 35 15 2.3 87 35 25 1.8 88 35 35 4.3 96 35 115 14.0 97 35 125 14.9 98 35 135 14.1 99 35 145 26.2 100 35 155 29.2 101 35 165 25.6 102 35 175 22.7 103 35 185 23.6 104 35 195 26.1 105 35 205 33.0 106 35 215 42.1 107 35 225 54.3 108 35 235 39.4 109 35 245 34.0 112 35 275 8.5 113 35 285 11.4 114 35 295 13.2 115 35 305 13.1 116 35 315 9.4 117 35 325 17.6 118 35 335 29.7 119 35 345 33.4 120 35 355 11.6 124 25 35 1.4 125 25 45 1.0 126 25 55 5.1 127 25 65 22.3 129 25 85 16.9 131 25 105 10.3 132 25 115 11.5 133 25 125 10.2 134 25 135 9.7 135 25 145 10.5 136 25 155 11.8 137 25 165 10.8 138 25 175 9.4 139 25 185 8.7 140 25 195 9.5 141 25 205 17.8 142 25 215 37.3 143 25 225 53.4 144 25 235 58.1 145 25 245 26.9 146 25 255 15.1 147 25 265 7.0 148 25 275 6.1 149 25 285 7.8 150 25 295 6.4 151 25 305 6.2 152 25 315 8.2 153 25 325 18.5 154 25 335 33.7 155 25 345 22.9 160 15 35 4.7 161 15 45 8.9 162 15 55 9.4 163 15 65 18.8 164 15 75 20.2 165 15 85 15.6 166 15 95 15.4 167 15 105 10.7 168 15 115 15.1 169 15 125 14.3 170 15 135 14.2 171 15 145 13.1 172 15 155 10.6 173 15 165 9.1 174 15 175 9.7 175 15 185 9.4 176 15 195 11.2 177 15 205 16.9 178 15 215 28.8 179 15 225 34.9 180 15 235 41.1 181 15 245 21.3 182 15 255 14.8 183 15 265 14.9 184 15 275 12.3 185 15 285 11.0 186 15 295 8.6 187 15 305 10.9 188 15 315 17.4 189 15 325 25.7 190 15 335 28.5 191 15 345 18.0 193 5 5 26.6 197 5 45 9.7 198 5 55 8.4 199 5 65 9.6 200 5 75 13.6 201 5 85 14.0 202 5 95 14.2 203 5 105 13.4 204 5 115 14.4 205 5 125 15.9 206 5 135 9.8 207 5 145 16.2 208 5 155 16.8 209 5 165 15.3 210 5 175 14.5 211 5 185 7.0 212 5 195 11.2 213 5 205 13.8 214 5 215 17.3 215 5 225 17.0 216 5 235 26.0 217 5 245 27.4 218 5 255 26.8 219 5 265 32.0 220 5 275 24.0 221 5 285 23.4 223 5 305 12.9 224 5 315 12.4 225 5 325 10.1 226 5 335 16.6 227 5 345 22.2 228 5 355 25.7 229 -5 5 34.2 230 -5 15 24.6 233 -5 45 11.2 234 -5 55 14.6 235 -5 65 13.7 236 -5 75 15.6 237 -5 85 15.1 238 -5 95 15.6 239 -5 105 9.8 240 -5 115 7.6 241 -5 125 10.6 242 -5 135 13.0 243 -5 145 13.7 244 -5 155 20.2 245 -5 165 10.7 246 -5 175 6.3 247 -5 185 7.0 248 -5 195 8.6 249 -5 205 7.5 250 -5 215 8.3 251 -5 225 8.1 252 -5 235 7.2 253 -5 245 11.2 254 -5 255 27.7 255 -5 265 45.1 256 -5 275 51.1 260 -5 315 7.9 261 -5 325 11.2 262 -5 335 12.1 263 -5 345 12.8 264 -5 355 30.8 265 -15 5 59.6 266 -15 15 34.0 268 -15 35 5.8 269 -15 45 8.4 270 -15 55 11.9 271 -15 65 16.6 272 -15 75 16.5 273 -15 85 23.5 274 -15 95 21.5 275 -15 105 18.9 276 -15 115 7.5 277 -15 125 3.0 278 -15 135 12.9 279 -15 145 16.5 280 -15 155 21.6 281 -15 165 23.0 282 -15 175 21.2 283 -15 185 18.8 284 -15 195 12.7 285 -15 205 12.4 286 -15 215 11.3 287 -15 225 8.8 288 -15 235 14.8 289 -15 245 17.9 290 -15 255 27.7 291 -15 265 46.3 292 -15 275 65.2 293 -15 285 60.6 297 -15 325 11.8 298 -15 335 15.3 299 -15 345 21.1 300 -15 355 53.8 301 -25 5 45.4 302 -25 15 19.3 304 -25 35 9.8 305 -25 45 13.4 306 -25 55 17.3 307 -25 65 25.1 308 -25 75 31.7 309 -25 85 36.6 310 -25 95 32.3 311 -25 105 24.4 312 -25 115 13.3 316 -25 155 11.9 317 -25 165 18.5 318 -25 175 21.0 319 -25 185 24.6 320 -25 195 27.1 321 -25 205 22.1 322 -25 215 24.9 323 -25 225 20.9 324 -25 235 20.2 325 -25 245 17.9 328 -25 275 39.5 329 -25 285 45.2 332 -25 315 14.3 333 -25 325 17.9 334 -25 335 21.9 335 -25 345 26.5 336 -25 355 34.7 337 -35 5 37.0 338 -35 15 19.6 339 -35 25 10.0 340 -35 35 14.1 341 -35 45 23.6 342 -35 55 25.0 343 -35 65 30.7 344 -35 75 36.3 345 -35 85 33.2 346 -35 95 29.4 347 -35 105 23.9 348 -35 115 20.0 349 -35 125 22.6 350 -35 135 24.8 351 -35 145 23.9 352 -35 155 16.1 353 -35 165 20.5 354 -35 175 18.3 355 -35 185 22.2 356 -35 195 21.5 357 -35 205 20.5 358 -35 215 27.1 359 -35 225 23.5 364 -35 275 39.9 365 -35 285 33.0 367 -35 305 21.0 368 -35 315 21.8 369 -35 325 32.3 370 -35 335 22.8 371 -35 345 23.7 372 -35 355 29.1 387 -45 145 21.3 388 -45 155 29.1 389 -45 165 25.5 390 -45 175 25.5 391 -45 185 36.2 393 -45 205 33.7 397 -45 245 48.2 400 -45 275 37.5 401 -45 285 26.9 402 -45 295 28.2 403 -45 305 25.8 404 -45 315 24.9 417 -55 170 60.7 423 -55 290 29.1 424 -55 310 30.9 425 -55 330 27.4