Stratus Amount-When-Present (%) September, October, November (1954 - 1997) Night, Ship Observations Only Global Average: 84.7 Zonal Averages 17 zones Lat.N Average 85 88.5 75 89.1 65 87.3 55 89.6 45 88.8 35 84.0 25 79.7 15 78.7 5 82.3 -5 82.3 -15 83.2 -25 84.3 -35 86.3 -45 87.8 -55 90.8 -65 89.8 -75 87.6 Grid Box Averages 323 filled boxes Box # Lat.N Lon.E Average 1 85 60 88.7 2 85 180 92.3 3 85 300 84.4 4 75 20 90.0 5 75 60 92.4 6 75 100 91.5 7 75 140 90.4 8 75 180 91.9 9 75 220 88.1 10 75 260 77.9 11 75 300 80.6 12 75 340 90.5 13 65 10 85.6 14 65 30 88.6 15 65 50 88.3 21 65 170 94.8 22 65 190 93.3 23 65 210 92.6 25 65 250 81.7 26 65 270 84.5 27 65 290 88.0 28 65 310 87.3 29 65 330 83.7 30 65 350 87.8 31 55 10 83.4 32 55 30 85.0 38 55 150 89.3 39 55 170 92.2 40 55 190 91.3 41 55 210 90.9 42 55 230 90.8 44 55 270 85.7 45 55 290 85.6 46 55 310 89.4 47 55 330 89.1 48 55 350 87.3 49 45 5 75.0 50 45 15 72.2 51 45 25 80.3 52 45 35 80.2 62 45 135 83.1 63 45 145 88.3 64 45 155 90.9 65 45 165 91.3 66 45 175 91.1 67 45 185 90.1 68 45 195 90.2 69 45 205 90.1 70 45 215 90.4 71 45 225 90.1 72 45 235 87.9 77 45 285 83.9 78 45 295 86.4 79 45 305 87.6 80 45 315 87.5 81 45 325 86.9 82 45 335 87.4 83 45 345 86.3 84 45 355 83.6 85 35 5 71.1 86 35 15 73.5 87 35 25 72.3 88 35 35 70.0 97 35 125 80.0 98 35 135 80.7 99 35 145 86.9 100 35 155 87.2 101 35 165 86.3 102 35 175 85.6 103 35 185 86.6 104 35 195 86.8 105 35 205 86.5 106 35 215 85.5 107 35 225 86.5 108 35 235 86.8 109 35 245 82.4 112 35 275 77.4 113 35 285 80.1 114 35 295 82.1 115 35 305 81.5 116 35 315 81.0 117 35 325 81.4 118 35 335 81.8 119 35 345 79.4 120 35 355 72.0 124 25 35 54.1 126 25 55 67.0 127 25 65 71.8 132 25 115 84.2 133 25 125 83.6 134 25 135 80.7 135 25 145 80.1 136 25 155 80.4 137 25 165 76.9 138 25 175 79.6 139 25 185 78.4 140 25 195 80.5 141 25 205 80.0 142 25 215 83.1 143 25 225 86.5 144 25 235 89.5 145 25 245 78.4 146 25 255 69.5 147 25 265 76.7 148 25 275 74.2 149 25 285 74.6 150 25 295 75.7 151 25 305 75.3 152 25 315 75.3 153 25 325 76.2 154 25 335 70.7 155 25 345 71.3 161 15 45 56.9 162 15 55 73.8 163 15 65 72.3 164 15 75 76.2 165 15 85 69.9 166 15 95 72.0 167 15 105 83.3 168 15 115 80.5 169 15 125 79.6 170 15 135 81.8 171 15 145 81.3 172 15 155 81.6 173 15 165 81.3 174 15 175 74.9 175 15 185 75.2 176 15 195 76.7 177 15 205 80.8 178 15 215 81.1 179 15 225 85.8 180 15 235 84.1 181 15 245 81.6 182 15 255 79.2 183 15 265 77.9 184 15 275 76.7 185 15 285 70.5 186 15 295 73.0 187 15 305 77.4 188 15 315 76.0 189 15 325 80.8 190 15 335 72.2 191 15 345 71.9 193 5 5 77.8 198 5 55 74.2 199 5 65 73.1 200 5 75 77.3 201 5 85 77.0 202 5 95 79.2 203 5 105 77.5 204 5 115 79.4 205 5 125 81.1 206 5 135 77.7 207 5 145 83.5 208 5 155 81.7 209 5 165 77.1 210 5 175 83.0 211 5 185 75.6 212 5 195 84.0 213 5 205 81.9 214 5 215 87.2 215 5 225 87.4 216 5 235 86.8 217 5 245 87.3 218 5 255 88.0 219 5 265 87.4 220 5 275 83.9 221 5 285 79.6 223 5 305 73.5 224 5 315 76.5 225 5 325 81.3 226 5 335 82.2 227 5 345 81.2 228 5 355 78.2 229 -5 5 82.4 230 -5 15 72.2 233 -5 45 69.6 234 -5 55 82.3 235 -5 65 82.5 236 -5 75 82.4 237 -5 85 80.9 238 -5 95 80.7 239 -5 105 81.0 240 -5 115 62.7 241 -5 125 67.7 243 -5 145 73.6 244 -5 155 77.5 245 -5 165 77.5 246 -5 175 75.0 247 -5 185 82.3 254 -5 255 86.1 255 -5 265 88.7 256 -5 275 91.1 261 -5 325 70.7 262 -5 335 77.1 263 -5 345 86.6 264 -5 355 87.6 265 -15 5 92.3 266 -15 15 82.9 269 -15 45 65.6 270 -15 55 81.0 271 -15 65 81.2 272 -15 75 80.1 273 -15 85 81.5 274 -15 95 80.4 275 -15 105 75.8 279 -15 145 81.2 280 -15 155 81.0 281 -15 165 82.1 282 -15 175 78.7 283 -15 185 79.3 284 -15 195 81.1 285 -15 205 81.4 286 -15 215 85.3 287 -15 225 80.8 289 -15 245 80.6 290 -15 255 84.7 291 -15 265 82.8 292 -15 275 89.9 293 -15 285 90.5 297 -15 325 77.5 298 -15 335 83.2 299 -15 345 85.8 300 -15 355 92.1 301 -25 5 88.7 302 -25 15 83.8 304 -25 35 84.1 305 -25 45 80.9 306 -25 55 83.6 307 -25 65 83.8 308 -25 75 84.0 309 -25 85 85.7 310 -25 95 84.4 311 -25 105 80.7 312 -25 115 70.2 316 -25 155 78.7 317 -25 165 79.6 318 -25 175 82.3 319 -25 185 83.0 320 -25 195 85.9 321 -25 205 86.5 322 -25 215 88.3 323 -25 225 85.2 324 -25 235 86.8 328 -25 275 88.0 329 -25 285 89.6 332 -25 315 79.8 333 -25 325 83.3 334 -25 335 87.7 335 -25 345 81.3 336 -25 355 82.9 337 -35 5 87.2 338 -35 15 79.6 339 -35 25 84.6 340 -35 35 86.1 341 -35 45 87.5 342 -35 55 87.5 343 -35 65 88.2 344 -35 75 86.3 345 -35 85 87.4 346 -35 95 87.1 347 -35 105 82.2 348 -35 115 83.2 349 -35 125 82.8 350 -35 135 83.1 351 -35 145 81.9 352 -35 155 84.4 353 -35 165 86.6 354 -35 175 85.5 355 -35 185 84.4 356 -35 195 87.0 357 -35 205 89.8 358 -35 215 89.5 359 -35 225 89.9 363 -35 265 88.7 364 -35 275 89.3 365 -35 285 83.7 367 -35 305 81.5 368 -35 315 83.1 369 -35 325 88.9 370 -35 335 86.1 371 -35 345 85.0 372 -35 355 86.6 379 -45 65 83.1 380 -45 75 83.1 381 -45 85 90.5 382 -45 95 86.2 383 -45 105 86.4 387 -45 145 78.8 388 -45 155 88.1 389 -45 165 89.2 390 -45 175 85.4 391 -45 185 88.8 392 -45 195 91.1 393 -45 205 93.8 400 -45 275 91.8 401 -45 285 87.8 402 -45 295 71.9 403 -45 305 83.3 404 -45 315 90.3 408 -45 355 93.8 410 -55 30 89.0 411 -55 50 92.0 412 -55 70 88.2 413 -55 90 89.2 414 -55 110 90.5 415 -55 130 93.5 416 -55 150 89.6 417 -55 170 92.1 421 -55 250 95.2 422 -55 270 92.4 423 -55 290 87.5 424 -55 310 87.7 425 -55 330 89.2 430 -65 70 90.6 431 -65 90 81.1 432 -65 110 90.0 433 -65 130 91.7 434 -65 150 92.5 435 -65 170 93.0 441 -65 290 87.4 442 -65 310 92.2 449 -75 180 87.6