Stratocumulus Average Cloud Amount (%) June, July, August (1954 - 1997) Night, Ship Observations Only Global Average: 23.2 Zonal Averages 15 zones Lat.N Average 85 21.1 75 26.8 65 29.2 55 29.5 45 28.2 35 23.7 25 17.7 15 16.5 5 16.8 -5 16.0 -15 22.7 -25 25.5 -35 26.2 -45 30.2 -55 33.5 Grid Box Averages 351 filled boxes Box # Lat.N Lon.E Average 1 85 60 20.4 2 85 180 25.2 3 85 300 16.1 4 75 20 34.4 5 75 60 33.5 6 75 100 26.4 7 75 140 22.1 8 75 180 22.8 9 75 220 23.6 10 75 260 30.2 11 75 300 19.2 12 75 340 26.2 13 65 10 31.3 14 65 30 32.1 15 65 50 31.6 16 65 70 30.0 20 65 150 23.6 21 65 170 35.7 22 65 190 31.0 23 65 210 28.9 24 65 230 20.5 25 65 250 26.8 26 65 270 25.6 27 65 290 21.9 28 65 310 21.6 29 65 330 30.3 30 65 350 33.6 31 55 10 20.8 32 55 30 16.6 37 55 130 21.9 38 55 150 22.9 39 55 170 28.9 40 55 190 31.3 41 55 210 34.3 42 55 230 33.6 44 55 270 19.2 45 55 290 20.2 46 55 310 27.0 47 55 330 35.6 48 55 350 33.8 49 45 5 7.8 50 45 15 5.9 51 45 25 9.1 52 45 35 10.6 53 45 45 14.3 54 45 55 14.9 62 45 135 21.6 63 45 145 22.8 64 45 155 25.9 65 45 165 26.6 66 45 175 29.1 67 45 185 31.1 68 45 195 32.6 69 45 205 34.8 70 45 215 39.0 71 45 225 42.3 72 45 235 33.3 77 45 285 12.5 78 45 295 13.1 79 45 305 17.2 80 45 315 22.8 81 45 325 31.0 82 45 335 33.8 83 45 345 33.8 84 45 355 22.6 85 35 5 8.9 86 35 15 3.7 87 35 25 2.6 88 35 35 5.8 96 35 115 15.5 97 35 125 15.2 98 35 135 15.9 99 35 145 25.3 100 35 155 29.6 101 35 165 27.5 102 35 175 25.4 103 35 185 25.2 104 35 195 26.2 105 35 205 32.2 106 35 215 39.4 107 35 225 50.0 108 35 235 35.9 109 35 245 35.2 112 35 275 8.6 113 35 285 11.9 114 35 295 14.6 115 35 305 14.2 116 35 315 11.9 117 35 325 17.7 118 35 335 28.4 119 35 345 31.7 120 35 355 12.1 124 25 35 1.5 125 25 45 1.7 126 25 55 4.5 127 25 65 20.9 128 25 75 14.8 129 25 85 20.2 130 25 95 15.9 131 25 105 12.0 132 25 115 13.3 133 25 125 13.7 134 25 135 11.9 135 25 145 12.2 136 25 155 11.4 137 25 165 11.4 138 25 175 10.3 139 25 185 9.6 140 25 195 9.9 141 25 205 16.7 142 25 215 34.0 143 25 225 50.8 144 25 235 56.7 145 25 245 28.1 146 25 255 16.6 147 25 265 7.3 148 25 275 6.7 149 25 285 9.2 150 25 295 8.0 151 25 305 6.8 152 25 315 9.0 153 25 325 15.6 154 25 335 29.8 155 25 345 21.8 160 15 35 4.9 161 15 45 7.7 162 15 55 9.4 163 15 65 18.1 164 15 75 17.8 165 15 85 15.7 166 15 95 15.2 167 15 105 11.0 168 15 115 15.8 169 15 125 15.2 170 15 135 14.0 171 15 145 13.0 172 15 155 10.4 173 15 165 8.1 174 15 175 10.2 175 15 185 9.7 176 15 195 11.2 177 15 205 15.6 178 15 215 26.1 179 15 225 33.9 180 15 235 38.2 181 15 245 23.7 182 15 255 15.5 183 15 265 14.9 184 15 275 11.9 185 15 285 11.4 186 15 295 8.1 187 15 305 10.1 188 15 315 15.4 189 15 325 25.4 190 15 335 26.2 191 15 345 14.3 193 5 5 25.4 197 5 45 8.8 198 5 55 7.9 199 5 65 9.1 200 5 75 12.1 201 5 85 13.1 202 5 95 14.7 203 5 105 14.3 204 5 115 14.6 205 5 125 16.6 206 5 135 11.5 207 5 145 17.1 208 5 155 16.3 209 5 165 14.0 210 5 175 12.9 211 5 185 11.9 212 5 195 11.5 213 5 205 13.8 214 5 215 19.8 215 5 225 19.5 216 5 235 21.9 217 5 245 24.8 218 5 255 27.3 219 5 265 30.9 220 5 275 24.4 221 5 285 22.9 223 5 305 12.9 224 5 315 13.1 225 5 325 12.0 226 5 335 16.9 227 5 345 22.4 228 5 355 26.9 229 -5 5 35.8 230 -5 15 30.1 232 -5 35 10.6 233 -5 45 10.1 234 -5 55 12.6 235 -5 65 12.1 236 -5 75 14.0 237 -5 85 14.1 238 -5 95 13.7 239 -5 105 11.9 240 -5 115 8.0 241 -5 125 9.9 242 -5 135 14.0 243 -5 145 13.5 244 -5 155 18.5 245 -5 165 11.2 246 -5 175 8.5 247 -5 185 7.5 248 -5 195 9.1 249 -5 205 6.4 250 -5 215 7.6 251 -5 225 8.3 252 -5 235 6.7 253 -5 245 12.1 254 -5 255 27.6 255 -5 265 43.3 256 -5 275 49.3 257 -5 285 41.9 260 -5 315 7.7 261 -5 325 10.3 262 -5 335 10.6 263 -5 345 15.5 264 -5 355 32.0 265 -15 5 60.1 266 -15 15 30.1 268 -15 35 5.6 269 -15 45 7.1 270 -15 55 12.3 271 -15 65 15.7 272 -15 75 18.2 273 -15 85 21.9 274 -15 95 20.9 275 -15 105 17.9 276 -15 115 7.6 277 -15 125 2.5 278 -15 135 12.1 279 -15 145 15.4 280 -15 155 20.6 281 -15 165 20.3 282 -15 175 20.7 283 -15 185 17.6 284 -15 195 15.2 285 -15 205 15.1 286 -15 215 12.8 287 -15 225 10.2 288 -15 235 14.6 289 -15 245 17.2 290 -15 255 27.9 291 -15 265 38.8 292 -15 275 63.1 293 -15 285 56.5 297 -15 325 10.8 298 -15 335 17.4 299 -15 345 23.8 300 -15 355 54.4 301 -25 5 45.8 302 -25 15 20.0 304 -25 35 9.5 305 -25 45 14.2 306 -25 55 17.1 307 -25 65 26.1 308 -25 75 28.7 309 -25 85 33.6 310 -25 95 31.7 311 -25 105 24.0 312 -25 115 13.8 315 -25 145 8.3 316 -25 155 11.4 317 -25 165 19.2 318 -25 175 22.4 319 -25 185 23.5 320 -25 195 23.1 321 -25 205 24.6 322 -25 215 25.2 323 -25 225 22.2 324 -25 235 20.2 325 -25 245 17.3 326 -25 255 17.4 327 -25 265 38.9 328 -25 275 44.6 329 -25 285 46.5 332 -25 315 14.4 333 -25 325 16.2 334 -25 335 23.3 335 -25 345 28.2 336 -25 355 35.8 337 -35 5 35.0 338 -35 15 19.1 339 -35 25 11.8 340 -35 35 14.9 341 -35 45 24.7 342 -35 55 27.2 343 -35 65 32.5 344 -35 75 36.9 345 -35 85 35.2 346 -35 95 32.4 347 -35 105 29.1 348 -35 115 19.9 349 -35 125 21.0 350 -35 135 24.8 351 -35 145 23.7 352 -35 155 15.9 353 -35 165 21.7 354 -35 175 20.5 355 -35 185 22.3 356 -35 195 22.1 357 -35 205 23.2 358 -35 215 26.8 359 -35 225 26.8 360 -35 235 23.7 361 -35 245 30.0 363 -35 265 33.0 364 -35 275 38.2 365 -35 285 31.1 367 -35 305 18.3 368 -35 315 21.6 369 -35 325 29.1 370 -35 335 27.0 371 -35 345 24.4 372 -35 355 30.5 377 -45 45 27.8 378 -45 55 27.7 379 -45 65 20.3 380 -45 75 26.3 385 -45 125 27.9 386 -45 135 31.1 387 -45 145 21.7 388 -45 155 28.0 389 -45 165 24.8 390 -45 175 26.9 391 -45 185 33.1 392 -45 195 32.9 393 -45 205 33.0 394 -45 215 27.1 395 -45 225 28.9 396 -45 235 33.0 397 -45 245 39.6 398 -45 255 35.4 399 -45 265 38.8 400 -45 275 37.7 401 -45 285 36.0 402 -45 295 23.1 403 -45 305 23.5 404 -45 315 24.5 405 -45 325 29.8 408 -45 355 44.1 412 -55 70 25.6 417 -55 170 54.9 420 -55 230 31.8 422 -55 270 31.6 423 -55 290 32.0 424 -55 310 32.1 425 -55 330 26.0