High Level (Cirriform) Average Cloud Amount (%) June (1954 - 1997) Day, Ship Observations Only Global Average: 13.1 Zonal Averages 15 zones Lat.N Average 85 18.1 75 19.2 65 14.6 55 17.2 45 16.8 35 15.0 25 11.8 15 16.7 5 18.4 -5 12.5 -15 8.3 -25 9.1 -35 10.8 -45 11.8 -55 10.6 Grid Box Averages 331 filled boxes Box # Lat.N Lon.E Average 1 85 60 13.2 2 85 180 24.0 3 85 300 16.3 4 75 20 13.6 5 75 60 15.1 8 75 180 26.3 9 75 220 26.9 10 75 260 17.1 11 75 300 15.9 12 75 340 11.9 13 65 10 13.5 14 65 30 13.8 15 65 50 13.7 20 65 150 11.9 21 65 170 14.2 22 65 190 13.9 23 65 210 12.4 29 65 330 16.1 30 65 350 15.1 31 55 10 16.3 32 55 30 15.8 37 55 130 15.0 38 55 150 14.5 39 55 170 15.1 40 55 190 17.2 41 55 210 16.8 42 55 230 17.4 46 55 310 20.5 47 55 330 18.0 48 55 350 18.2 49 45 5 17.4 50 45 15 13.1 51 45 25 9.8 52 45 35 8.6 53 45 45 8.4 54 45 55 8.3 62 45 135 17.7 63 45 145 17.2 64 45 155 17.8 65 45 165 16.6 66 45 175 18.6 67 45 185 19.1 68 45 195 19.3 69 45 205 17.6 70 45 215 16.2 71 45 225 14.8 72 45 235 13.2 77 45 285 18.8 78 45 295 20.0 79 45 305 19.2 80 45 315 19.7 81 45 325 15.8 82 45 335 15.4 83 45 345 14.1 84 45 355 14.4 85 35 5 13.1 86 35 15 9.3 87 35 25 5.7 88 35 35 3.7 89 35 45 10.9 90 35 55 8.1 96 35 115 13.5 97 35 125 21.4 98 35 135 28.0 99 35 145 21.9 100 35 155 19.6 101 35 165 25.4 102 35 175 17.7 103 35 185 16.7 104 35 195 15.4 105 35 205 13.8 106 35 215 12.7 107 35 225 10.8 108 35 235 8.3 109 35 245 6.7 112 35 275 23.4 113 35 285 19.6 114 35 295 17.6 115 35 305 14.6 116 35 315 13.7 117 35 325 10.8 118 35 335 10.4 119 35 345 7.4 120 35 355 10.6 124 25 35 5.2 125 25 45 3.4 126 25 55 5.8 127 25 65 11.9 128 25 75 9.2 129 25 85 19.4 131 25 105 30.9 132 25 115 21.6 133 25 125 21.8 134 25 135 20.6 135 25 145 15.5 136 25 155 14.6 137 25 165 13.2 138 25 175 12.7 139 25 185 10.7 140 25 195 8.1 141 25 205 9.0 142 25 215 8.0 143 25 225 9.1 144 25 235 7.4 145 25 245 7.4 146 25 255 10.0 147 25 265 13.0 148 25 275 15.2 149 25 285 16.6 150 25 295 14.9 151 25 305 11.7 152 25 315 8.3 153 25 325 7.0 154 25 335 6.7 155 25 345 8.3 160 15 35 11.0 161 15 45 14.9 162 15 55 15.9 163 15 65 20.7 164 15 75 25.3 165 15 85 28.2 166 15 95 25.9 167 15 105 34.5 168 15 115 21.6 169 15 125 20.4 170 15 135 16.7 171 15 145 14.1 172 15 155 14.7 173 15 165 19.2 174 15 175 14.6 175 15 185 12.6 176 15 195 11.5 177 15 205 11.6 178 15 215 13.1 179 15 225 9.8 180 15 235 9.6 181 15 245 12.0 182 15 255 18.0 183 15 265 25.6 184 15 275 23.7 185 15 285 19.5 186 15 295 17.9 187 15 305 15.7 188 15 315 13.8 189 15 325 13.9 190 15 335 15.7 191 15 345 19.6 193 5 5 17.3 197 5 45 17.5 198 5 55 19.0 199 5 65 25.9 200 5 75 27.2 201 5 85 27.4 202 5 95 30.2 203 5 105 24.3 204 5 115 26.2 205 5 125 22.5 206 5 135 22.2 207 5 145 19.4 208 5 155 21.0 209 5 165 17.1 210 5 175 20.7 211 5 185 16.9 212 5 195 15.5 213 5 205 11.8 214 5 215 11.0 215 5 225 14.8 216 5 235 11.2 217 5 245 9.4 218 5 255 14.2 219 5 265 18.1 220 5 275 25.2 221 5 285 27.1 223 5 305 18.5 224 5 315 14.1 225 5 325 10.3 226 5 335 14.2 227 5 345 17.8 228 5 355 12.8 229 -5 5 7.8 230 -5 15 6.0 232 -5 35 6.2 233 -5 45 11.2 234 -5 55 19.0 235 -5 65 22.7 236 -5 75 22.5 237 -5 85 23.9 238 -5 95 22.4 239 -5 105 20.2 240 -5 115 13.4 241 -5 125 15.0 242 -5 135 14.9 243 -5 145 17.1 244 -5 155 17.7 245 -5 165 18.1 246 -5 175 14.4 247 -5 185 12.3 248 -5 195 12.3 249 -5 205 10.7 250 -5 215 8.2 251 -5 225 3.9 252 -5 235 3.5 253 -5 245 5.3 254 -5 255 5.9 255 -5 265 7.2 256 -5 275 13.5 257 -5 285 12.0 260 -5 315 9.9 261 -5 325 7.4 262 -5 335 6.1 263 -5 345 6.0 264 -5 355 6.8 265 -15 5 4.3 266 -15 15 5.1 268 -15 35 3.4 269 -15 45 3.9 270 -15 55 6.2 271 -15 65 7.0 272 -15 75 11.9 273 -15 85 9.5 274 -15 95 12.3 275 -15 105 11.3 276 -15 115 7.1 277 -15 125 8.2 278 -15 135 10.0 279 -15 145 10.0 280 -15 155 9.5 281 -15 165 13.1 282 -15 175 11.5 283 -15 185 14.5 284 -15 195 10.8 285 -15 205 8.0 286 -15 215 6.8 287 -15 225 6.4 288 -15 235 4.8 289 -15 245 4.2 290 -15 255 4.7 291 -15 265 7.2 292 -15 275 7.0 293 -15 285 13.5 297 -15 325 9.7 298 -15 335 6.6 299 -15 345 7.6 300 -15 355 4.8 301 -25 5 5.5 302 -25 15 5.4 304 -25 35 4.4 305 -25 45 4.7 306 -25 55 4.3 307 -25 65 6.9 308 -25 75 4.8 309 -25 85 5.5 310 -25 95 5.6 311 -25 105 5.3 312 -25 115 6.1 315 -25 145 4.7 316 -25 155 6.8 317 -25 165 9.8 318 -25 175 10.9 319 -25 185 12.0 320 -25 195 11.3 321 -25 205 12.8 322 -25 215 15.7 323 -25 225 14.9 324 -25 235 11.7 325 -25 245 11.9 326 -25 255 10.3 327 -25 265 11.8 328 -25 275 7.0 329 -25 285 8.7 332 -25 315 13.9 333 -25 325 10.8 334 -25 335 10.2 335 -25 345 11.1 336 -25 355 8.8 337 -35 5 10.9 338 -35 15 9.7 339 -35 25 11.0 340 -35 35 7.5 341 -35 45 7.0 342 -35 55 8.0 343 -35 65 7.7 344 -35 75 8.8 345 -35 85 3.9 346 -35 95 5.8 347 -35 105 8.0 348 -35 115 10.0 349 -35 125 12.3 350 -35 135 13.1 351 -35 145 14.2 352 -35 155 11.3 353 -35 165 10.3 354 -35 175 10.7 355 -35 185 11.0 356 -35 195 10.8 357 -35 205 14.6 358 -35 215 11.9 359 -35 225 13.2 360 -35 235 11.8 362 -35 255 17.1 364 -35 275 10.5 365 -35 285 9.9 367 -35 305 15.7 368 -35 315 15.5 369 -35 325 14.0 370 -35 335 10.2 371 -35 345 13.5 372 -35 355 12.1 380 -45 75 13.4 387 -45 145 16.5 388 -45 155 13.8 389 -45 165 14.4 390 -45 175 10.7 391 -45 185 11.2 392 -45 195 11.0 393 -45 205 9.3 394 -45 215 11.8 395 -45 225 20.9 397 -45 245 9.8 398 -45 255 7.8 399 -45 265 11.7 400 -45 275 7.9 401 -45 285 6.9 402 -45 295 14.2 403 -45 305 11.0 404 -45 315 13.3 405 -45 325 8.7 417 -55 170 10.9 423 -55 290 9.9 424 -55 310 13.6 425 -55 330 7.8