Silver Lake, OR. Direct Normal Data Silver Lake, OR. Hourly Average Direct Normal Data For 2002 to 2013 Latitude: 43.12 degrees Longitude: 121.06 degrees Altitude: 1355 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 16 184 310 372 390 407 406 358 273 101 0 0 0 0 2817 Feb 0 0 0 0 139 355 456 484 490 488 505 456 388 259 35 0 0 0 4055 Mar 0 0 0 63 268 393 430 485 494 477 466 450 403 311 149 3 0 0 4392 Apr 0 0 51 256 389 452 498 504 509 508 483 445 410 372 268 58 0 0 5204 May 0 8 214 407 513 557 578 573 567 548 514 480 438 390 323 174 6 0 6288 Jun 0 47 368 528 616 660 699 712 691 678 660 633 590 563 499 374 81 0 8400 Jul 0 12 349 612 739 803 828 844 842 811 774 740 700 647 561 412 76 0 9749 Aug 0 0 137 502 657 742 793 816 803 791 747 706 649 585 475 211 2 0 8615 Sep 0 0 11 346 598 692 748 782 793 776 744 690 627 533 290 18 0 0 7649 Oct 0 0 0 88 380 506 585 632 631 605 567 514 442 265 23 0 0 0 5237 Nov 0 0 0 1 137 315 387 421 435 412 396 328 238 48 0 0 0 0 3119 Dec 0 0 0 0 23 203 317 375 393 383 352 300 206 16 0 0 0 0 2568 Values in Watt hours/meter^2 per hour Silver Lake, OR. Daily Average Direct Normal Data For 2002 to 2013 Latitude: 43.12 degrees Longitude: 121.06 degrees Altitude: 1355 meters Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly 2002 ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- 1.18 ---- 2003 1.88 5.28 4.25 2.90 6.03 9.84 9.70 7.90 8.10 5.27 2.05 1.42 5.38 2004 1.66 4.11 5.43 6.24 6.16 8.77 9.74 7.32 7.31 5.18 3.45 2.81 5.69 2005 2.54 4.58 4.73 3.91 4.40 7.46 10.57 9.73 7.61 5.56 3.45 1.74 5.53 2006 1.71 5.07 3.29 5.21 7.07 8.32 9.77 8.55 8.02 5.76 2.25 2.75 5.65 2007 4.18 2.89 4.74 5.93 7.59 8.89 9.28 9.80 7.89 4.61 4.60 2.14 6.07 2008 2.69 4.13 4.83 5.98 5.47 9.42 9.29 8.86 7.33 5.33 2.72 2.99 5.76 2009 3.90 3.68 4.58 6.35 7.90 7.06 9.49 8.59 8.00 4.36 4.14 3.04 5.94 2010 1.23 3.03 4.62 4.58 5.20 7.52 10.58 8.61 7.35 4.26 3.06 1.97 5.18 2011 3.26 3.29 3.17 5.21 5.21 8.13 9.47 9.59 7.70 4.86 2.78 4.14 5.59 2012 3.60 3.99 3.97 4.36 7.16 8.27 9.90 8.59 8.15 5.94 2.13 2.22 5.69 2013 3.96 4.56 4.50 6.56 6.98 8.73 9.44 7.22 6.36 6.41 3.85 3.66 6.03 Average 2.78 4.05 4.37 5.20 6.29 8.40 9.75 8.62 7.62 5.23 3.14 2.51 5.67 % SD 38 19 15 22 18 10 5 10 7 13 27 35 5 Values in average daily KWhr/meter^2 per Day * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.