Stratus Amount-When-Present (%) June, July, August (1954 - 1997) Night, Ship Observations Only Global Average: 84.0 Zonal Averages 15 zones Lat.N Average 85 89.1 75 89.0 65 87.6 55 92.2 45 91.9 35 84.2 25 79.3 15 78.5 5 80.6 -5 81.3 -15 83.5 -25 83.3 -35 84.9 -45 88.2 -55 88.1 Grid Box Averages 301 filled boxes Box # Lat.N Lon.E Average 1 85 60 87.3 2 85 180 92.0 3 85 300 88.1 4 75 20 90.5 5 75 60 91.8 6 75 100 94.7 7 75 140 91.2 8 75 180 89.2 9 75 220 84.9 10 75 260 78.9 11 75 300 84.7 12 75 340 92.0 13 65 10 86.9 14 65 30 88.9 15 65 50 88.6 20 65 150 82.7 21 65 170 95.5 22 65 190 92.7 23 65 210 91.2 24 65 230 84.5 25 65 250 81.7 26 65 270 82.2 27 65 290 82.6 28 65 310 88.1 29 65 330 85.5 30 65 350 89.2 31 55 10 82.2 32 55 30 79.9 37 55 130 89.8 38 55 150 91.4 39 55 170 95.4 40 55 190 94.9 41 55 210 94.2 42 55 230 92.6 44 55 270 87.5 45 55 290 80.6 46 55 310 90.8 47 55 330 92.5 48 55 350 88.3 49 45 5 65.9 50 45 15 58.2 51 45 25 74.1 52 45 35 72.0 62 45 135 87.6 63 45 145 90.9 64 45 155 93.8 65 45 165 95.4 66 45 175 95.8 67 45 185 95.6 68 45 195 93.7 69 45 205 93.7 70 45 215 94.1 71 45 225 93.6 72 45 235 88.8 77 45 285 77.3 78 45 295 81.2 79 45 305 84.9 80 45 315 89.2 81 45 325 90.5 82 45 335 89.6 83 45 345 88.4 84 45 355 84.2 85 35 5 67.1 86 35 15 54.2 87 35 25 51.0 88 35 35 55.0 97 35 125 76.1 98 35 135 78.3 99 35 145 85.2 100 35 155 88.9 101 35 165 87.6 102 35 175 86.8 103 35 185 87.6 104 35 195 86.5 105 35 205 86.2 106 35 215 88.3 107 35 225 89.4 108 35 235 90.2 109 35 245 87.1 112 35 275 66.6 113 35 285 72.4 114 35 295 76.3 115 35 305 77.7 116 35 315 77.7 117 35 325 80.5 118 35 335 84.1 119 35 345 84.8 120 35 355 72.8 124 25 35 54.8 126 25 55 72.3 127 25 65 79.2 132 25 115 77.8 133 25 125 77.7 134 25 135 74.9 135 25 145 80.3 136 25 155 77.7 137 25 165 78.9 138 25 175 76.8 139 25 185 78.0 140 25 195 72.7 141 25 205 76.1 142 25 215 83.9 143 25 225 88.0 144 25 235 90.3 145 25 245 84.5 146 25 255 72.1 147 25 265 68.0 148 25 275 68.6 149 25 285 68.8 150 25 295 70.3 151 25 305 70.5 152 25 315 74.5 153 25 325 77.2 154 25 335 78.4 155 25 345 79.7 161 15 45 70.0 162 15 55 68.6 163 15 65 79.0 164 15 75 77.7 165 15 85 72.0 166 15 95 78.1 167 15 105 73.0 168 15 115 78.7 169 15 125 79.5 170 15 135 84.1 171 15 145 82.6 172 15 155 81.8 173 15 165 78.7 174 15 175 76.4 175 15 185 72.8 176 15 195 73.5 177 15 205 80.4 178 15 215 81.9 179 15 225 87.1 180 15 235 85.2 181 15 245 82.3 182 15 255 77.1 183 15 265 77.2 184 15 275 73.2 185 15 285 66.0 186 15 295 68.0 187 15 305 73.2 188 15 315 78.7 189 15 325 80.6 190 15 335 79.5 191 15 345 75.0 193 5 5 81.6 197 5 45 66.9 198 5 55 62.3 199 5 65 70.8 200 5 75 73.4 201 5 85 69.7 202 5 95 75.7 203 5 105 74.7 204 5 115 78.8 205 5 125 80.2 206 5 135 83.0 207 5 145 83.3 208 5 155 82.8 209 5 165 79.3 210 5 175 78.4 211 5 185 75.5 212 5 195 83.6 213 5 205 84.5 214 5 215 84.1 215 5 225 87.0 216 5 235 79.4 217 5 245 85.8 218 5 255 88.2 219 5 265 85.3 220 5 275 82.4 221 5 285 76.8 223 5 305 77.4 224 5 315 77.5 225 5 325 81.4 226 5 335 81.9 227 5 345 82.8 228 5 355 81.7 229 -5 5 78.9 233 -5 45 74.8 234 -5 55 81.6 235 -5 65 78.4 236 -5 75 78.8 237 -5 85 78.4 238 -5 95 78.4 239 -5 105 76.6 240 -5 115 74.1 241 -5 125 81.3 242 -5 135 75.7 243 -5 145 80.7 244 -5 155 82.6 245 -5 165 84.6 247 -5 185 78.2 248 -5 195 77.3 254 -5 255 85.4 255 -5 265 87.7 256 -5 275 90.9 257 -5 285 94.3 260 -5 315 60.5 261 -5 325 77.5 262 -5 335 78.5 263 -5 345 79.9 264 -5 355 81.8 265 -15 5 89.7 266 -15 15 85.7 269 -15 45 73.5 270 -15 55 80.8 271 -15 65 83.8 272 -15 75 83.4 273 -15 85 80.6 274 -15 95 82.0 275 -15 105 82.4 279 -15 145 78.0 280 -15 155 84.3 281 -15 165 85.4 282 -15 175 81.6 283 -15 185 82.6 284 -15 195 80.2 285 -15 205 80.6 286 -15 215 80.3 287 -15 225 82.5 289 -15 245 85.0 290 -15 255 82.7 292 -15 275 89.6 293 -15 285 93.8 297 -15 325 74.4 299 -15 345 83.8 300 -15 355 87.9 301 -25 5 85.3 302 -25 15 83.2 304 -25 35 78.7 305 -25 45 77.2 306 -25 55 79.5 307 -25 65 81.0 308 -25 75 85.2 309 -25 85 85.2 310 -25 95 81.6 311 -25 105 80.1 312 -25 115 81.9 316 -25 155 81.6 317 -25 165 81.1 318 -25 175 85.2 319 -25 185 82.3 320 -25 195 85.6 321 -25 205 87.3 322 -25 215 87.6 323 -25 225 86.3 324 -25 235 85.8 328 -25 275 83.5 329 -25 285 88.0 332 -25 315 75.3 333 -25 325 77.1 334 -25 335 83.3 336 -25 355 81.9 337 -35 5 83.4 338 -35 15 81.8 339 -35 25 83.0 340 -35 35 80.9 341 -35 45 84.1 342 -35 55 82.3 343 -35 65 85.4 344 -35 75 89.9 345 -35 85 85.4 346 -35 95 86.0 347 -35 105 86.9 348 -35 115 83.2 349 -35 125 80.7 350 -35 135 81.9 351 -35 145 84.0 352 -35 155 84.1 353 -35 165 84.2 354 -35 175 86.5 355 -35 185 84.5 356 -35 195 85.7 357 -35 205 88.7 358 -35 215 87.8 359 -35 225 86.7 364 -35 275 89.2 365 -35 285 81.9 367 -35 305 86.2 368 -35 315 82.5 369 -35 325 85.1 370 -35 335 83.7 371 -35 345 83.8 372 -35 355 83.4 387 -45 145 86.4 388 -45 155 85.9 389 -45 165 86.1 390 -45 175 86.6 391 -45 185 90.7 392 -45 195 89.3 394 -45 215 91.4 398 -45 255 88.4 400 -45 275 89.0 401 -45 285 92.6 402 -45 295 84.6 403 -45 305 88.3 404 -45 315 85.3 423 -55 290 89.3 424 -55 310 89.2 425 -55 330 86.0