Dillon, MT. Direct Normal Data Dillon, MT. Hourly Average Direct Normal Data For 2002 to 2013 Latitude: 45.21 degrees Longitude: 112.64 degrees Altitude: 1590 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 93 303 388 413 434 426 386 321 188 11 0 0 0 2962 Feb 0 0 0 0 32 231 382 450 500 526 505 455 390 318 127 0 0 0 3918 Mar 0 0 0 15 175 341 447 500 483 496 484 440 398 352 227 42 0 0 4400 Apr 0 0 8 153 324 428 486 517 504 497 459 456 400 345 288 148 7 0 5018 May 0 0 106 312 423 505 541 542 552 526 487 460 418 390 327 227 62 0 5877 Jun 0 6 213 398 506 581 632 634 633 618 567 535 489 434 381 326 169 0 7121 Jul 0 0 200 491 641 727 777 793 795 762 696 643 579 525 485 387 194 0 8695 Aug 0 0 31 317 529 630 670 703 712 668 630 595 535 482 405 253 38 0 7198 Sep 0 0 0 122 400 542 618 654 666 663 636 616 546 464 334 70 0 0 6331 Oct 0 0 0 7 210 386 483 523 557 548 523 482 426 323 90 0 0 0 4557 Nov 0 0 0 0 37 246 391 464 480 501 460 401 325 145 1 0 0 0 3452 Dec 0 0 0 0 0 80 264 369 412 410 392 344 250 78 0 0 0 0 2599 Values in Watt hours/meter^2 per hour Dillon, MT. Daily Average Direct Normal Data For 2002 to 2013 Latitude: 45.21 degrees Longitude: 112.64 degrees Altitude: 1590 meters Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly 2002 ---- ---- ---- ---- ---- ---- ---- ---- ---- 5.50 3.45 2.13 ---- 2003 2.29 4.04 3.35 4.08 6.15 8.05 9.61 7.03 6.80 5.10 4.18 2.25 5.25 2004 2.72 3.52 5.13 5.85 4.59 7.15 8.05 6.91 5.96 4.66 4.01 2.05 5.06 2005 3.11 6.00 4.40 4.98 5.60 6.24 9.01 8.06 5.85 4.48 3.40 2.84 5.32 2006 2.44 4.50 4.24 4.99 7.21 6.95 8.72 7.21 6.05 4.34 3.03 2.96 5.22 2007 4.30 2.42 5.62 5.55 6.60 8.16 8.00 6.15 5.55 4.56 3.94 2.01 5.26 2008 2.72 4.27 2.58* ---- 4.86 7.56 9.21 8.20 6.52 5.09* 2.89 2.19 ---- 2009 3.39 3.86* 0.67* 3.74* 8.00 5.15 7.92 6.51 7.48 3.39 4.35 3.08 4.81 2010 2.94 3.82 4.83 5.18 4.67 6.22 9.71 6.95 7.02 4.70 2.63 3.04 5.15 2011 2.36 3.83 3.30 4.13 5.06 6.39 9.53 7.81 7.58 3.83 3.40 3.38 5.06 2012 3.31 2.96 3.76 5.12 6.90 8.97 7.72 7.03 6.06 4.50 2.75 2.47 5.14 2013 3.00 3.97 5.53 5.66 5.21 7.25 8.15 7.32 4.74 5.32 3.40 2.77 5.20 Average 2.96 3.93 3.95 4.93 5.90 7.10 8.70 7.20 6.33 4.62 3.45 2.60 5.14 % SD 20 23 37 15 20 15 9 9 13 13 16 18 3 Values in average daily KWhr/meter^2 per Day * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.