Portland-PSU, OR. Direct Normal Data Portland-PSU, OR. Hourly Average Direct Normal Data For 2004 to 2010 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 61 118 161 184 194 205 179 89 0 0 0 0 0 1190 Feb 0 0 0 0 21 126 196 256 289 292 282 253 225 84 0 0 0 0 2025 Mar 0 0 0 0 42 157 203 225 249 249 263 238 195 144 32 0 0 0 1998 Apr 0 0 0 35 158 209 262 299 324 345 325 315 289 255 185 33 0 0 3033 May 0 0 47 140 201 263 313 327 351 347 352 340 307 281 229 128 5 0 3628 Jun 0 1 69 162 216 249 302 327 363 372 365 359 352 322 284 213 47 0 4003 Jul 0 0 95 223 315 380 438 501 549 582 610 610 582 546 468 350 53 0 6303 Aug 0 0 6 82 236 303 362 421 472 525 541 540 522 487 388 157 0 0 5043 Sep 0 0 0 2 178 302 373 439 482 500 506 481 426 355 123 0 0 0 4166 Oct 0 0 0 0 74 140 207 259 283 321 307 288 248 54 0 0 0 0 2179 Nov 0 0 0 0 13 73 129 163 174 201 179 162 48 0 0 0 0 0 1142 Dec 0 0 0 0 0 36 85 149 161 165 152 119 1 0 0 0 0 0 868 Values in Watt hours/meter^2 per hour Portland-PSU, OR. Daily Average Direct Normal Data For 2004 to 2010 Latitude: 45.51 degrees Longitude: 122.69 degrees Altitude: 70 meters Year\Mth 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 ---- Average 1.04 1.95 2.00 3.03 3.58 4.00 6.30 5.03 4.15 2.18 1.14 0.86 2.94 % SD 69 46 27 31 38 20 7 18 22 30 47 47 7 Values in average daily KWhr/meter^2 per Day * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.