Portland-PSU, OR. Direct Normal Data Portland-PSU, OR. Hourly Average Direct Normal Data For 2004 to 2013 Latitude: 45.51 degrees Longitude: 122.69 degrees Altitude: 70 meters Mon\Hr 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 Total Jan 0 0 0 0 0 46 100 146 174 182 192 178 87 0 0 0 0 0 1104 Feb 0 0 0 0 17 106 165 220 249 257 251 229 201 74 0 0 0 0 1771 Mar 0 0 0 2 47 143 184 202 219 226 243 217 183 134 31 0 0 0 1833 Apr 0 0 0 38 154 201 237 284 304 326 309 299 269 233 162 25 0 0 2841 May 0 0 42 133 201 257 304 323 340 339 359 357 328 282 225 113 4 0 3605 Jun 0 1 64 157 212 244 291 317 351 370 356 354 342 306 273 204 43 0 3884 Jul 0 0 87 211 307 371 423 486 541 583 608 611 586 549 474 350 56 0 6245 Aug 0 0 7 85 237 311 374 435 473 528 546 551 533 493 391 139 0 0 5102 Sep 0 0 0 23 189 300 373 433 479 499 495 474 426 350 129 0 0 0 4171 Oct 0 0 0 4 80 152 211 263 294 332 320 299 254 69 0 0 0 0 2278 Nov 0 0 0 0 11 71 128 163 170 193 175 155 48 0 0 0 0 0 1113 Dec 0 0 0 0 0 37 91 145 160 166 158 124 11 0 0 0 0 0 892 Values in Watt hours/meter^2 per hour Portland-PSU, OR. Daily Average Direct Normal Data For 2004 to 2013 Latitude: 45.51 degrees Longitude: 122.69 degrees Altitude: 70 meters Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly 2004 ---- 1.12* 2.84 4.48 2.46 5.28 6.15 4.97 3.07 2.57 1.20 0.78* ---- 2005 0.99 3.67 2.60 2.10 2.64 3.03 6.89 6.59 4.95 1.34 1.88 1.13 3.14 2006 0.46 2.25 1.65 3.58 4.51 4.63 6.78 5.77 5.18 3.13 0.55 0.87 3.28 2007 1.92 1.02 1.77 2.49 4.46 3.90 5.55 4.98 3.99 1.75 1.83 0.33 2.84 2008 1.13 1.79 1.38 2.20 2.69 4.35 6.05 4.11 4.91 2.58 0.91 0.78 2.75 2009 1.70 1.58 1.64 3.35 5.90 3.60 6.59 4.06 4.05 1.55 0.93 1.56 3.05 2010 0.03 2.20* 2.11 ---- 2.40 3.23 6.11 4.75 2.89 2.32 0.65 0.55 ---- 2011 0.69 1.43 0.57 2.51 2.74 2.72 5.15 5.63 4.22 1.25 0.90 1.38 2.44 2012 0.83 1.49 1.58 2.08 3.81 3.11 5.47 5.99 5.51 2.71 0.72 0.53 2.82 2013 1.34 0.96 2.21 2.79 4.11 4.99 7.70 4.10 2.81 3.53 1.51 0.92 3.09 Average 1.01 1.75 1.83 2.84 3.57 3.88 6.24 5.10 4.16 2.27 1.11 0.88 2.89 % SD 59 46 35 29 33 23 12 17 24 34 43 44 9 Values in average daily KWhr/meter^2 per Day * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.