Stratus Amount-When-Present (%) December, January, February (1954 - 1997) Day, Ship Observations Only Global Average: 83.0 Zonal Averages 17 zones Lat.N Average 85 85.7 75 89.0 65 84.9 55 89.5 45 88.3 35 84.0 25 80.9 15 76.6 5 79.4 -5 78.0 -15 79.1 -25 80.6 -35 85.0 -45 88.0 -55 90.3 -65 88.8 -75 87.0 Grid Box Averages 371 filled boxes Box # Lat.N Lon.E Average 2 85 180 85.7 4 75 20 88.6 5 75 60 90.5 12 75 340 87.0 13 65 10 84.8 14 65 30 85.1 15 65 50 87.9 21 65 170 95.8 22 65 190 95.3 23 65 210 88.8 27 65 290 89.0 29 65 330 76.5 30 65 350 81.3 31 55 10 85.7 32 55 30 89.4 38 55 150 90.4 39 55 170 92.0 40 55 190 91.4 41 55 210 91.0 42 55 230 91.3 46 55 310 88.3 47 55 330 87.0 48 55 350 86.3 49 45 5 78.7 50 45 15 79.1 51 45 25 86.5 52 45 35 88.8 53 45 45 78.7 54 45 55 81.4 62 45 135 86.0 63 45 145 88.5 64 45 155 89.4 65 45 165 88.1 66 45 175 89.0 67 45 185 88.7 68 45 195 89.2 69 45 205 90.0 70 45 215 89.5 71 45 225 89.5 72 45 235 89.3 77 45 285 87.4 78 45 295 87.9 79 45 305 89.2 80 45 315 88.5 81 45 325 87.0 82 45 335 86.0 83 45 345 85.6 84 45 355 85.6 85 35 5 76.8 86 35 15 77.3 87 35 25 77.1 88 35 35 74.1 96 35 115 82.8 97 35 125 82.8 98 35 135 85.5 99 35 145 86.5 100 35 155 86.3 101 35 165 84.4 102 35 175 85.2 103 35 185 85.9 104 35 195 85.5 105 35 205 86.1 106 35 215 85.9 107 35 225 85.2 108 35 235 84.0 109 35 245 73.4 112 35 275 80.9 113 35 285 84.8 114 35 295 85.2 115 35 305 82.7 116 35 315 81.0 117 35 325 81.5 118 35 335 80.5 119 35 345 79.9 120 35 355 77.4 124 25 35 63.6 125 25 45 77.3 126 25 55 69.5 127 25 65 54.8 131 25 105 94.5 132 25 115 87.6 133 25 125 87.8 134 25 135 84.8 135 25 145 83.9 136 25 155 81.5 137 25 165 81.1 138 25 175 80.7 139 25 185 81.6 140 25 195 80.7 141 25 205 80.3 142 25 215 81.5 143 25 225 81.0 144 25 235 83.3 145 25 245 71.4 146 25 255 67.7 147 25 265 82.7 148 25 275 79.6 149 25 285 77.3 150 25 295 75.4 151 25 305 76.9 152 25 315 76.6 153 25 325 75.6 154 25 335 72.2 155 25 345 68.3 160 15 35 67.8 161 15 45 68.0 162 15 55 64.0 163 15 65 58.2 164 15 75 48.9 165 15 85 66.8 166 15 95 61.5 167 15 105 87.6 168 15 115 77.7 169 15 125 82.3 170 15 135 83.2 171 15 145 78.8 172 15 155 77.8 173 15 165 75.3 174 15 175 76.5 175 15 185 76.5 176 15 195 77.0 177 15 205 76.5 178 15 215 79.5 179 15 225 82.4 180 15 235 82.2 181 15 245 79.8 182 15 255 66.2 183 15 265 54.6 184 15 275 72.7 185 15 285 67.8 186 15 295 68.9 187 15 305 71.9 188 15 315 74.2 189 15 325 74.4 190 15 335 70.9 191 15 345 65.4 193 5 5 69.8 197 5 45 69.7 198 5 55 74.0 199 5 65 72.3 200 5 75 67.9 201 5 85 75.7 202 5 95 75.1 203 5 105 77.9 204 5 115 79.2 205 5 125 80.5 206 5 135 77.7 207 5 145 80.5 208 5 155 81.6 209 5 165 77.8 210 5 175 77.3 211 5 185 83.2 212 5 195 81.2 213 5 205 83.5 214 5 215 85.1 215 5 225 82.8 216 5 235 83.6 217 5 245 80.9 218 5 255 82.3 219 5 265 80.4 220 5 275 77.1 221 5 285 79.4 223 5 305 73.6 224 5 315 78.3 225 5 325 80.2 226 5 335 78.2 227 5 345 73.3 228 5 355 70.0 229 -5 5 72.6 230 -5 15 76.0 233 -5 45 71.3 234 -5 55 74.6 235 -5 65 78.3 236 -5 75 78.7 237 -5 85 77.6 238 -5 95 80.4 239 -5 105 80.6 240 -5 115 78.9 241 -5 125 75.4 242 -5 135 77.2 243 -5 145 79.2 244 -5 155 81.0 245 -5 165 80.3 246 -5 175 80.3 247 -5 185 78.7 248 -5 195 83.5 249 -5 205 81.5 250 -5 215 80.0 252 -5 235 71.9 253 -5 245 77.2 254 -5 255 79.2 255 -5 265 80.7 256 -5 275 71.1 257 -5 285 67.5 260 -5 315 74.5 261 -5 325 71.7 262 -5 335 74.1 263 -5 345 74.0 264 -5 355 72.5 265 -15 5 82.7 266 -15 15 79.6 268 -15 35 77.5 269 -15 45 77.3 270 -15 55 74.2 271 -15 65 78.3 272 -15 75 79.5 273 -15 85 79.5 274 -15 95 77.8 275 -15 105 77.9 276 -15 115 80.9 277 -15 125 79.3 278 -15 135 82.0 279 -15 145 81.8 280 -15 155 80.4 281 -15 165 80.5 282 -15 175 78.4 283 -15 185 79.3 284 -15 195 81.0 285 -15 205 82.0 286 -15 215 80.8 287 -15 225 80.1 288 -15 235 74.5 289 -15 245 73.4 290 -15 255 72.6 291 -15 265 79.6 292 -15 275 81.0 293 -15 285 78.0 297 -15 325 76.1 298 -15 335 69.5 299 -15 345 75.5 300 -15 355 80.8 301 -25 5 82.0 302 -25 15 84.1 304 -25 35 80.7 305 -25 45 77.6 306 -25 55 79.8 307 -25 65 75.2 308 -25 75 79.7 309 -25 85 80.0 310 -25 95 81.3 311 -25 105 81.0 312 -25 115 68.3 315 -25 145 85.3 316 -25 155 81.2 317 -25 165 80.4 318 -25 175 80.5 319 -25 185 80.9 320 -25 195 83.3 321 -25 205 85.3 322 -25 215 85.1 323 -25 225 82.1 324 -25 235 81.8 325 -25 245 74.4 328 -25 275 76.3 329 -25 285 85.4 332 -25 315 73.0 333 -25 325 78.3 334 -25 335 80.6 335 -25 345 76.0 336 -25 355 76.7 337 -35 5 82.9 338 -35 15 80.3 339 -35 25 82.6 340 -35 35 83.4 341 -35 45 84.6 342 -35 55 83.0 343 -35 65 86.5 344 -35 75 87.9 345 -35 85 83.5 346 -35 95 84.1 347 -35 105 85.5 348 -35 115 80.0 349 -35 125 81.8 350 -35 135 81.3 351 -35 145 80.7 352 -35 155 83.4 353 -35 165 85.6 354 -35 175 84.6 355 -35 185 86.4 356 -35 195 86.6 357 -35 205 87.8 358 -35 215 87.9 359 -35 225 88.8 360 -35 235 85.8 361 -35 245 86.3 363 -35 265 90.1 364 -35 275 86.0 365 -35 285 88.4 367 -35 305 76.2 368 -35 315 80.4 369 -35 325 85.9 370 -35 335 83.7 371 -35 345 85.0 372 -35 355 82.5 373 -45 5 89.2 374 -45 15 87.7 375 -45 25 87.7 376 -45 35 89.5 377 -45 45 87.7 378 -45 55 87.9 379 -45 65 88.9 380 -45 75 87.5 381 -45 85 89.3 382 -45 95 89.8 383 -45 105 89.0 384 -45 115 88.5 385 -45 125 88.9 386 -45 135 86.4 387 -45 145 80.8 388 -45 155 86.9 389 -45 165 87.9 390 -45 175 83.4 391 -45 185 87.3 392 -45 195 89.3 393 -45 205 92.2 394 -45 215 90.9 395 -45 225 87.9 396 -45 235 88.7 397 -45 245 89.4 398 -45 255 88.3 399 -45 265 88.5 400 -45 275 88.2 401 -45 285 89.2 402 -45 295 76.8 403 -45 305 82.0 404 -45 315 84.5 405 -45 325 87.8 406 -45 335 87.0 407 -45 345 88.6 408 -45 355 87.8 409 -55 10 91.1 410 -55 30 91.4 411 -55 50 89.8 412 -55 70 87.7 413 -55 90 89.0 414 -55 110 88.2 415 -55 130 88.5 416 -55 150 90.9 417 -55 170 91.3 418 -55 190 91.8 419 -55 210 96.1 420 -55 230 91.3 421 -55 250 91.7 422 -55 270 91.6 423 -55 290 84.7 424 -55 310 87.1 425 -55 330 90.2 426 -55 350 89.0 427 -65 10 87.8 428 -65 30 72.4 429 -65 50 83.4 430 -65 70 88.1 431 -65 90 89.7 432 -65 110 87.1 433 -65 130 89.2 434 -65 150 90.0 435 -65 170 91.1 436 -65 190 90.4 437 -65 210 92.4 438 -65 230 92.8 439 -65 250 91.7 440 -65 270 90.6 441 -65 290 85.3 442 -65 310 88.7 443 -65 330 92.0 444 -65 350 88.2 449 -75 180 81.5 450 -75 220 95.6 451 -75 260 86.8 452 -75 300 79.2 453 -75 340 86.5