Stratus Amount-When-Present (%) September, October, November (1954 - 1997) Day, Ship Observations Only Global Average: 83.1 Zonal Averages 17 zones Lat.N Average 85 84.6 75 87.5 65 85.8 55 88.6 45 87.4 35 82.3 25 78.2 15 77.7 5 80.4 -5 78.7 -15 80.9 -25 81.9 -35 84.7 -45 87.4 -55 90.2 -65 89.8 -75 86.3 Grid Box Averages 372 filled boxes Box # Lat.N Lon.E Average 1 85 60 84.2 2 85 180 91.1 3 85 300 79.2 4 75 20 89.0 5 75 60 92.3 6 75 100 91.0 7 75 140 90.0 8 75 180 89.1 9 75 220 85.1 10 75 260 74.7 11 75 300 78.3 12 75 340 90.3 13 65 10 84.8 14 65 30 90.0 15 65 50 90.4 16 65 70 90.8 20 65 150 88.4 21 65 170 92.9 22 65 190 93.6 23 65 210 92.4 25 65 250 82.8 26 65 270 84.2 27 65 290 85.0 28 65 310 85.9 29 65 330 80.8 30 65 350 85.0 31 55 10 83.0 32 55 30 88.0 37 55 130 77.1 38 55 150 89.1 39 55 170 91.2 40 55 190 90.3 41 55 210 89.5 42 55 230 90.5 44 55 270 84.5 45 55 290 87.1 46 55 310 88.6 47 55 330 88.2 48 55 350 85.7 49 45 5 73.5 50 45 15 70.9 51 45 25 78.0 52 45 35 82.5 53 45 45 72.5 54 45 55 68.8 62 45 135 84.3 63 45 145 87.7 64 45 155 88.9 65 45 165 89.6 66 45 175 89.8 67 45 185 89.5 68 45 195 89.0 69 45 205 89.0 70 45 215 88.8 71 45 225 88.6 72 45 235 86.5 77 45 285 83.0 78 45 295 84.9 79 45 305 85.5 80 45 315 86.4 81 45 325 85.7 82 45 335 85.3 83 45 345 84.7 84 45 355 82.4 85 35 5 70.5 86 35 15 70.4 87 35 25 68.4 88 35 35 62.6 96 35 115 73.1 97 35 125 76.7 98 35 135 81.9 99 35 145 86.5 100 35 155 86.3 101 35 165 84.9 102 35 175 85.4 103 35 185 84.6 104 35 195 85.1 105 35 205 84.3 106 35 215 83.8 107 35 225 84.0 108 35 235 84.0 109 35 245 76.7 112 35 275 75.6 113 35 285 79.8 114 35 295 81.4 115 35 305 80.1 116 35 315 78.6 117 35 325 78.0 118 35 335 78.2 119 35 345 75.7 120 35 355 70.8 124 25 35 51.5 126 25 55 60.4 127 25 65 63.5 129 25 85 73.4 132 25 115 82.1 133 25 125 83.3 134 25 135 80.5 135 25 145 79.7 136 25 155 79.0 137 25 165 79.4 138 25 175 78.8 139 25 185 79.0 140 25 195 79.1 141 25 205 77.3 142 25 215 78.7 143 25 225 81.4 144 25 235 84.1 145 25 245 73.5 146 25 255 74.0 147 25 265 77.5 148 25 275 75.7 149 25 285 75.1 150 25 295 74.9 151 25 305 75.5 152 25 315 74.7 153 25 325 74.1 154 25 335 67.3 155 25 345 69.0 160 15 35 54.6 161 15 45 53.4 162 15 55 70.3 163 15 65 71.4 164 15 75 73.6 165 15 85 72.3 166 15 95 76.4 167 15 105 80.6 168 15 115 80.3 169 15 125 80.3 170 15 135 81.5 171 15 145 81.8 172 15 155 79.1 173 15 165 81.3 174 15 175 76.3 175 15 185 80.1 176 15 195 76.5 177 15 205 77.7 178 15 215 79.6 179 15 225 82.0 180 15 235 82.5 181 15 245 80.8 182 15 255 76.4 183 15 265 75.5 184 15 275 77.2 185 15 285 72.4 186 15 295 71.8 187 15 305 74.5 188 15 315 74.2 189 15 325 76.7 190 15 335 71.9 191 15 345 70.5 193 5 5 78.0 197 5 45 68.5 198 5 55 67.3 199 5 65 72.9 200 5 75 74.1 201 5 85 75.4 202 5 95 79.0 203 5 105 78.5 204 5 115 80.0 205 5 125 78.1 206 5 135 78.1 207 5 145 82.0 208 5 155 80.8 209 5 165 76.7 210 5 175 78.1 211 5 185 82.6 212 5 195 81.1 213 5 205 81.9 214 5 215 84.8 215 5 225 84.8 216 5 235 81.7 217 5 245 81.3 218 5 255 85.8 219 5 265 85.0 220 5 275 84.5 221 5 285 83.7 223 5 305 75.2 224 5 315 75.8 225 5 325 76.9 226 5 335 79.7 227 5 345 78.4 228 5 355 76.7 229 -5 5 79.8 230 -5 15 78.7 233 -5 45 69.6 234 -5 55 73.6 235 -5 65 77.5 236 -5 75 80.5 237 -5 85 79.2 238 -5 95 80.0 239 -5 105 77.7 240 -5 115 71.2 241 -5 125 61.9 242 -5 135 72.9 243 -5 145 77.1 244 -5 155 79.8 245 -5 165 79.4 246 -5 175 81.5 247 -5 185 71.9 248 -5 195 78.3 249 -5 205 79.6 252 -5 235 65.1 253 -5 245 73.9 254 -5 255 77.1 255 -5 265 81.8 256 -5 275 87.3 257 -5 285 89.9 260 -5 315 55.3 261 -5 325 65.8 262 -5 335 71.1 263 -5 345 80.7 264 -5 355 83.0 265 -15 5 89.9 266 -15 15 82.8 268 -15 35 76.2 269 -15 45 66.7 270 -15 55 73.6 271 -15 65 75.9 272 -15 75 79.6 273 -15 85 80.3 274 -15 95 82.1 275 -15 105 76.7 276 -15 115 62.2 277 -15 125 57.3 278 -15 135 63.7 279 -15 145 72.9 280 -15 155 78.1 281 -15 165 77.8 282 -15 175 80.3 283 -15 185 81.7 284 -15 195 80.8 285 -15 205 83.0 286 -15 215 77.7 287 -15 225 82.1 288 -15 235 75.8 289 -15 245 76.0 290 -15 255 77.8 291 -15 265 81.9 292 -15 275 86.4 293 -15 285 91.1 297 -15 325 76.6 298 -15 335 77.4 299 -15 345 82.0 300 -15 355 88.3 301 -25 5 83.8 302 -25 15 84.3 304 -25 35 81.4 305 -25 45 77.5 306 -25 55 77.2 307 -25 65 79.7 308 -25 75 79.0 309 -25 85 79.4 310 -25 95 82.0 311 -25 105 76.1 312 -25 115 72.0 316 -25 155 75.9 317 -25 165 78.5 318 -25 175 82.1 319 -25 185 82.8 320 -25 195 85.6 321 -25 205 85.5 322 -25 215 83.8 323 -25 225 83.2 324 -25 235 85.0 325 -25 245 80.9 326 -25 255 83.1 328 -25 275 79.7 329 -25 285 90.2 332 -25 315 78.0 333 -25 325 80.6 334 -25 335 82.6 335 -25 345 80.9 336 -25 355 81.3 337 -35 5 82.1 338 -35 15 79.4 339 -35 25 82.2 340 -35 35 84.5 341 -35 45 83.5 342 -35 55 85.3 343 -35 65 83.5 344 -35 75 84.3 345 -35 85 85.5 346 -35 95 85.3 347 -35 105 83.6 348 -35 115 80.7 349 -35 125 80.1 350 -35 135 81.4 351 -35 145 80.9 352 -35 155 82.3 353 -35 165 85.0 354 -35 175 84.8 355 -35 185 85.8 356 -35 195 85.3 357 -35 205 87.9 358 -35 215 85.7 359 -35 225 86.7 360 -35 235 84.4 361 -35 245 83.7 362 -35 255 90.3 363 -35 265 87.5 364 -35 275 88.9 365 -35 285 88.7 367 -35 305 80.1 368 -35 315 83.6 369 -35 325 86.1 370 -35 335 86.2 371 -35 345 83.9 372 -35 355 84.8 373 -45 5 91.4 374 -45 15 90.7 376 -45 35 83.9 377 -45 45 88.5 378 -45 55 89.5 379 -45 65 81.2 380 -45 75 86.0 381 -45 85 90.7 382 -45 95 89.5 383 -45 105 87.1 384 -45 115 88.0 385 -45 125 83.0 386 -45 135 85.2 387 -45 145 77.6 388 -45 155 83.5 389 -45 165 87.0 390 -45 175 84.4 391 -45 185 87.4 392 -45 195 89.6 393 -45 205 89.9 394 -45 215 90.9 395 -45 225 90.3 396 -45 235 85.3 397 -45 245 89.9 400 -45 275 92.2 401 -45 285 90.7 402 -45 295 76.4 403 -45 305 80.1 404 -45 315 85.6 405 -45 325 87.6 406 -45 335 84.4 407 -45 345 87.8 408 -45 355 89.2 409 -55 10 89.8 410 -55 30 92.7 411 -55 50 90.4 412 -55 70 85.9 413 -55 90 88.0 414 -55 110 91.2 415 -55 130 87.4 416 -55 150 90.7 417 -55 170 91.7 419 -55 210 89.8 420 -55 230 92.3 421 -55 250 93.5 422 -55 270 90.4 423 -55 290 85.9 424 -55 310 86.9 425 -55 330 88.0 426 -55 350 93.1 430 -65 70 88.3 431 -65 90 78.0 432 -65 110 88.1 433 -65 130 90.0 434 -65 150 89.3 435 -65 170 89.2 436 -65 190 87.0 441 -65 290 90.0 442 -65 310 88.7 443 -65 330 96.7 444 -65 350 91.9 449 -75 180 83.5 453 -75 340 88.1