Stratocumulus Amount-When-Present (%) June, July, August (1954 - 1997) Night, Ship Observations Only Global Average: 74.1 Zonal Averages 15 zones Lat.N Average 85 82.8 75 81.1 65 77.8 55 80.7 45 82.2 35 74.1 25 70.1 15 68.7 5 70.0 -5 70.5 -15 75.3 -25 73.6 -35 75.6 -45 77.4 -55 76.7 Grid Box Averages 335 filled boxes Box # Lat.N Lon.E Average 1 85 60 80.6 2 85 180 89.2 3 85 300 74.2 4 75 20 83.4 5 75 60 84.0 6 75 100 79.5 7 75 140 84.5 8 75 180 86.1 9 75 220 77.0 10 75 260 67.6 11 75 300 70.5 12 75 340 84.8 13 65 10 79.4 14 65 30 76.3 15 65 50 77.9 16 65 70 74.6 20 65 150 79.0 21 65 170 84.4 22 65 190 82.4 23 65 210 74.3 24 65 230 65.4 25 65 250 70.0 26 65 270 66.2 27 65 290 64.2 28 65 310 76.2 29 65 330 79.9 30 65 350 83.1 31 55 10 72.0 32 55 30 62.6 37 55 130 78.9 38 55 150 80.0 39 55 170 86.4 40 55 190 87.1 41 55 210 84.6 42 55 230 83.6 44 55 270 56.0 45 55 290 64.8 46 55 310 79.6 47 55 330 83.3 48 55 350 74.8 49 45 5 56.0 50 45 15 47.4 51 45 25 61.1 52 45 35 62.0 53 45 45 71.5 54 45 55 73.2 62 45 135 78.3 63 45 145 82.9 64 45 155 86.8 65 45 165 89.9 66 45 175 90.0 67 45 185 89.1 68 45 195 86.6 69 45 205 85.9 70 45 215 86.8 71 45 225 85.3 72 45 235 79.7 77 45 285 65.9 78 45 295 67.3 79 45 305 71.8 80 45 315 77.1 81 45 325 80.2 82 45 335 80.4 83 45 345 76.9 84 45 355 72.8 85 35 5 59.8 86 35 15 47.7 87 35 25 46.2 88 35 35 53.8 96 35 115 57.4 97 35 125 66.1 98 35 135 66.9 99 35 145 75.0 100 35 155 77.6 101 35 165 75.0 102 35 175 74.1 103 35 185 74.0 104 35 195 73.1 105 35 205 75.6 106 35 215 80.2 107 35 225 83.4 108 35 235 84.2 109 35 245 81.8 112 35 275 55.0 113 35 285 59.4 114 35 295 64.5 115 35 305 66.1 116 35 315 63.9 117 35 325 67.2 118 35 335 73.8 119 35 345 77.4 120 35 355 65.1 124 25 35 51.9 126 25 55 65.9 127 25 65 72.2 129 25 85 63.6 131 25 105 57.5 132 25 115 59.6 133 25 125 60.0 134 25 135 62.9 135 25 145 63.2 136 25 155 61.4 137 25 165 62.1 138 25 175 60.1 139 25 185 59.2 140 25 195 57.7 141 25 205 62.8 142 25 215 75.8 143 25 225 84.2 144 25 235 88.6 145 25 245 76.2 146 25 255 61.8 147 25 265 53.1 148 25 275 51.7 149 25 285 55.0 150 25 295 57.6 151 25 305 56.9 152 25 315 60.3 153 25 325 66.9 154 25 335 74.8 155 25 345 75.6 160 15 35 60.8 161 15 45 68.3 162 15 55 67.9 163 15 65 71.4 164 15 75 68.5 165 15 85 62.9 166 15 95 67.8 167 15 105 57.0 168 15 115 63.9 169 15 125 64.5 170 15 135 67.9 171 15 145 69.1 172 15 155 63.2 173 15 165 59.6 174 15 175 60.2 175 15 185 59.2 176 15 195 59.4 177 15 205 65.4 178 15 215 74.9 179 15 225 79.0 180 15 235 81.8 181 15 245 74.0 182 15 255 63.6 183 15 265 62.4 184 15 275 60.0 185 15 285 57.9 186 15 295 56.0 187 15 305 63.3 188 15 315 66.8 189 15 325 75.0 190 15 335 75.4 191 15 345 71.6 193 5 5 77.4 197 5 45 60.5 198 5 55 59.7 199 5 65 60.4 200 5 75 63.4 201 5 85 60.4 202 5 95 64.8 203 5 105 61.6 204 5 115 64.1 205 5 125 70.3 206 5 135 65.9 207 5 145 72.5 208 5 155 71.6 209 5 165 60.5 210 5 175 65.0 211 5 185 66.4 212 5 195 66.4 213 5 205 63.9 214 5 215 71.0 215 5 225 69.5 216 5 235 74.8 217 5 245 77.5 218 5 255 78.3 219 5 265 78.0 220 5 275 74.4 221 5 285 68.4 223 5 305 64.8 224 5 315 65.7 225 5 325 68.4 226 5 335 72.4 227 5 345 77.3 228 5 355 77.5 229 -5 5 81.7 230 -5 15 81.9 233 -5 45 64.6 234 -5 55 63.8 235 -5 65 62.9 236 -5 75 65.4 237 -5 85 65.8 238 -5 95 65.0 239 -5 105 63.2 240 -5 115 54.5 241 -5 125 58.5 242 -5 135 67.8 243 -5 145 64.8 244 -5 155 73.4 245 -5 165 63.5 246 -5 175 59.6 247 -5 185 56.7 248 -5 195 58.7 249 -5 205 53.4 250 -5 215 58.3 251 -5 225 62.7 252 -5 235 61.0 253 -5 245 65.4 254 -5 255 77.8 255 -5 265 80.5 256 -5 275 87.6 257 -5 285 86.1 260 -5 315 56.6 261 -5 325 63.2 262 -5 335 63.4 263 -5 345 70.7 264 -5 355 80.0 265 -15 5 88.5 266 -15 15 81.4 268 -15 35 55.1 269 -15 45 61.0 270 -15 55 66.3 271 -15 65 68.9 272 -15 75 69.9 273 -15 85 72.4 274 -15 95 70.0 275 -15 105 68.2 276 -15 115 64.7 277 -15 125 50.3 278 -15 135 66.2 279 -15 145 71.0 280 -15 155 73.7 281 -15 165 70.1 282 -15 175 68.7 283 -15 185 67.1 284 -15 195 70.5 285 -15 205 66.7 286 -15 215 65.4 287 -15 225 66.1 288 -15 235 68.6 289 -15 245 72.4 290 -15 255 75.7 291 -15 265 78.7 292 -15 275 88.0 293 -15 285 89.3 297 -15 325 61.0 298 -15 335 67.0 299 -15 345 74.0 300 -15 355 87.2 301 -25 5 81.7 302 -25 15 74.9 304 -25 35 66.2 305 -25 45 66.2 306 -25 55 68.4 307 -25 65 73.9 308 -25 75 77.8 309 -25 85 79.1 310 -25 95 74.2 311 -25 105 72.1 312 -25 115 67.3 316 -25 155 67.4 317 -25 165 68.4 318 -25 175 69.2 319 -25 185 68.4 320 -25 195 71.4 321 -25 205 67.8 322 -25 215 67.6 323 -25 225 66.3 324 -25 235 66.0 325 -25 245 72.8 326 -25 255 68.6 327 -25 265 79.0 328 -25 275 80.8 329 -25 285 86.5 332 -25 315 61.4 333 -25 325 66.2 334 -25 335 73.5 335 -25 345 73.2 336 -25 355 78.2 337 -35 5 77.2 338 -35 15 69.3 339 -35 25 67.4 340 -35 35 72.9 341 -35 45 74.5 342 -35 55 75.2 343 -35 65 82.0 344 -35 75 80.2 345 -35 85 80.9 346 -35 95 75.5 347 -35 105 76.7 348 -35 115 70.0 349 -35 125 70.3 350 -35 135 73.7 351 -35 145 72.4 352 -35 155 66.3 353 -35 165 72.2 354 -35 175 69.8 355 -35 185 70.8 356 -35 195 73.7 357 -35 205 71.8 358 -35 215 80.3 359 -35 225 74.0 360 -35 235 75.0 363 -35 265 81.3 364 -35 275 79.1 365 -35 285 75.4 367 -35 305 74.1 368 -35 315 74.3 369 -35 325 77.0 370 -35 335 78.4 371 -35 345 76.2 372 -35 355 75.8 377 -45 45 76.8 386 -45 135 82.2 387 -45 145 66.1 388 -45 155 78.0 389 -45 165 75.9 390 -45 175 73.0 391 -45 185 78.2 392 -45 195 77.1 393 -45 205 82.0 394 -45 215 80.5 397 -45 245 82.7 398 -45 255 79.1 400 -45 275 78.5 401 -45 285 78.7 402 -45 295 67.9 403 -45 305 72.3 404 -45 315 76.2 405 -45 325 78.1 417 -55 170 79.6 422 -55 270 80.1 423 -55 290 77.9 424 -55 310 70.3 425 -55 330 74.3