Stratus Amount-When-Present (%) June, July, August (1954 - 1997) Day, Ship Observations Only Global Average: 83.0 Zonal Averages 16 zones Lat.N Average 85 88.4 75 87.5 65 86.4 55 91.7 45 90.9 35 83.4 25 78.3 15 78.1 5 80.0 -5 77.6 -15 80.1 -25 80.2 -35 83.4 -45 86.8 -55 89.2 -65 93.5 Grid Box Averages 355 filled boxes Box # Lat.N Lon.E Average 1 85 60 87.4 2 85 180 90.6 3 85 300 87.3 4 75 20 90.1 5 75 60 92.3 6 75 100 93.3 7 75 140 91.4 8 75 180 87.9 9 75 220 81.6 10 75 260 75.4 11 75 300 82.8 12 75 340 88.9 13 65 10 85.8 14 65 30 89.5 15 65 50 89.6 20 65 150 84.4 21 65 170 95.1 22 65 190 92.5 23 65 210 89.4 24 65 230 84.8 25 65 250 77.3 26 65 270 80.2 27 65 290 81.9 28 65 310 87.6 29 65 330 84.1 30 65 350 86.7 31 55 10 81.8 32 55 30 81.8 37 55 130 90.9 38 55 150 91.9 39 55 170 94.4 40 55 190 94.3 41 55 210 93.4 42 55 230 92.7 44 55 270 84.7 45 55 290 83.0 46 55 310 90.3 47 55 330 91.2 48 55 350 87.5 49 45 5 64.0 50 45 15 61.3 51 45 25 77.5 52 45 35 77.7 53 45 45 69.5 54 45 55 71.7 62 45 135 89.8 63 45 145 90.2 64 45 155 92.5 65 45 165 93.8 66 45 175 94.3 67 45 185 93.9 68 45 195 93.5 69 45 205 92.7 70 45 215 92.0 71 45 225 91.2 72 45 235 87.7 77 45 285 80.2 78 45 295 84.0 79 45 305 86.1 80 45 315 88.0 81 45 325 87.9 82 45 335 88.3 83 45 345 87.5 84 45 355 83.7 85 35 5 64.9 86 35 15 58.8 87 35 25 53.0 88 35 35 55.9 96 35 115 78.3 97 35 125 78.5 98 35 135 80.3 99 35 145 84.5 100 35 155 86.9 101 35 165 85.8 102 35 175 86.4 103 35 185 85.9 104 35 195 86.3 105 35 205 85.1 106 35 215 85.0 107 35 225 86.3 108 35 235 89.4 109 35 245 85.9 112 35 275 66.1 113 35 285 76.5 114 35 295 79.3 115 35 305 78.5 116 35 315 77.7 117 35 325 78.6 118 35 335 79.8 119 35 345 82.0 120 35 355 71.1 124 25 35 50.0 126 25 55 70.8 127 25 65 80.5 128 25 75 76.6 129 25 85 77.9 131 25 105 70.3 132 25 115 78.9 133 25 125 79.3 134 25 135 77.2 135 25 145 79.5 136 25 155 77.8 137 25 165 78.2 138 25 175 76.9 139 25 185 75.7 140 25 195 74.2 141 25 205 74.1 142 25 215 80.0 143 25 225 85.7 144 25 235 88.0 145 25 245 79.3 146 25 255 67.0 147 25 265 71.3 148 25 275 71.2 149 25 285 71.5 150 25 295 71.6 151 25 305 70.6 152 25 315 70.7 153 25 325 73.8 154 25 335 76.6 155 25 345 78.2 160 15 35 63.7 161 15 45 67.5 162 15 55 70.0 163 15 65 80.1 164 15 75 79.2 165 15 85 74.1 166 15 95 77.9 167 15 105 73.7 168 15 115 79.7 169 15 125 81.4 170 15 135 84.4 171 15 145 82.7 172 15 155 80.0 173 15 165 78.8 174 15 175 77.4 175 15 185 77.2 176 15 195 73.3 177 15 205 74.2 178 15 215 77.2 179 15 225 83.6 180 15 235 83.9 181 15 245 81.5 182 15 255 77.4 183 15 265 76.4 184 15 275 73.0 185 15 285 68.9 186 15 295 69.2 187 15 305 73.1 188 15 315 74.9 189 15 325 80.3 190 15 335 77.6 191 15 345 77.0 193 5 5 81.2 197 5 45 68.6 198 5 55 62.4 199 5 65 71.6 200 5 75 74.7 201 5 85 70.2 202 5 95 75.4 203 5 105 76.5 204 5 115 77.9 205 5 125 78.0 206 5 135 80.6 207 5 145 83.2 208 5 155 82.2 209 5 165 80.6 210 5 175 80.9 211 5 185 82.8 212 5 195 80.0 213 5 205 81.8 214 5 215 82.9 215 5 225 85.6 216 5 235 81.1 217 5 245 83.8 218 5 255 83.7 219 5 265 82.7 220 5 275 82.0 221 5 285 81.4 223 5 305 77.2 224 5 315 78.1 225 5 325 77.8 226 5 335 80.6 227 5 345 82.5 228 5 355 79.5 229 -5 5 80.2 230 -5 15 77.5 233 -5 45 72.0 234 -5 55 74.8 235 -5 65 76.7 236 -5 75 78.4 237 -5 85 77.3 238 -5 95 81.2 239 -5 105 74.1 240 -5 115 71.0 241 -5 125 70.5 242 -5 135 79.6 243 -5 145 78.0 244 -5 155 82.6 245 -5 165 78.1 246 -5 175 75.5 247 -5 185 70.1 248 -5 195 78.0 249 -5 205 72.8 250 -5 215 73.5 251 -5 225 74.8 252 -5 235 68.3 253 -5 245 68.8 254 -5 255 75.0 255 -5 265 81.2 256 -5 275 88.1 257 -5 285 94.8 260 -5 315 69.9 261 -5 325 74.0 262 -5 335 73.2 263 -5 345 72.4 264 -5 355 78.1 265 -15 5 87.8 266 -15 15 85.3 268 -15 35 73.8 269 -15 45 70.1 270 -15 55 73.3 271 -15 65 75.9 272 -15 75 78.8 273 -15 85 81.1 274 -15 95 81.3 275 -15 105 78.2 276 -15 115 68.2 277 -15 125 66.3 278 -15 135 76.7 279 -15 145 75.3 280 -15 155 79.5 281 -15 165 81.6 282 -15 175 82.5 283 -15 185 82.5 284 -15 195 77.3 285 -15 205 78.8 286 -15 215 79.5 287 -15 225 76.1 288 -15 235 75.3 289 -15 245 77.6 290 -15 255 76.8 291 -15 265 79.8 292 -15 275 86.7 293 -15 285 91.5 297 -15 325 72.8 298 -15 335 74.1 299 -15 345 76.5 300 -15 355 84.5 301 -25 5 80.7 302 -25 15 80.7 304 -25 35 74.6 305 -25 45 74.0 306 -25 55 76.2 307 -25 65 76.0 308 -25 75 79.5 309 -25 85 79.7 310 -25 95 82.1 311 -25 105 77.9 312 -25 115 77.6 315 -25 145 81.0 316 -25 155 79.2 317 -25 165 79.8 318 -25 175 81.9 319 -25 185 81.5 320 -25 195 83.6 321 -25 205 81.0 322 -25 215 84.0 323 -25 225 83.5 324 -25 235 81.2 325 -25 245 79.9 326 -25 255 77.3 327 -25 265 81.2 328 -25 275 78.5 329 -25 285 87.8 332 -25 315 74.4 333 -25 325 75.8 334 -25 335 79.7 335 -25 345 79.3 336 -25 355 78.9 337 -35 5 82.3 338 -35 15 78.2 339 -35 25 78.2 340 -35 35 75.1 341 -35 45 78.5 342 -35 55 79.6 343 -35 65 80.4 344 -35 75 81.3 345 -35 85 81.9 346 -35 95 83.9 347 -35 105 82.7 348 -35 115 78.8 349 -35 125 77.3 350 -35 135 78.4 351 -35 145 79.4 352 -35 155 80.3 353 -35 165 82.3 354 -35 175 84.5 355 -35 185 85.9 356 -35 195 85.5 357 -35 205 85.5 358 -35 215 86.0 359 -35 225 86.9 360 -35 235 87.2 361 -35 245 89.3 362 -35 255 86.7 363 -35 265 85.8 364 -35 275 88.3 365 -35 285 86.1 367 -35 305 85.1 368 -35 315 83.9 369 -35 325 83.9 370 -35 335 84.6 371 -35 345 82.7 372 -35 355 81.8 376 -45 35 83.6 377 -45 45 88.2 378 -45 55 88.2 379 -45 65 87.1 380 -45 75 88.7 384 -45 115 87.3 385 -45 125 87.0 386 -45 135 84.3 387 -45 145 81.5 388 -45 155 81.9 389 -45 165 85.4 390 -45 175 86.9 391 -45 185 86.3 392 -45 195 86.7 393 -45 205 87.7 394 -45 215 89.6 395 -45 225 84.4 396 -45 235 89.7 397 -45 245 93.5 398 -45 255 89.7 399 -45 265 89.2 400 -45 275 88.4 401 -45 285 89.7 402 -45 295 78.2 403 -45 305 83.1 404 -45 315 84.2 405 -45 325 86.0 406 -45 335 88.1 407 -45 345 86.3 411 -55 50 94.0 412 -55 70 81.9 417 -55 170 86.5 419 -55 210 91.1 420 -55 230 92.5 421 -55 250 90.8 422 -55 270 90.9 423 -55 290 84.2 424 -55 310 85.3 425 -55 330 88.2 427 -65 10 93.5