Dillon, MT. Direct Normal Data Dillon, MT. Hourly Average Direct Normal Data For 2002 to 2010 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 94 307 390 422 444 423 384 328 187 11 0 0 0 2989 Feb 0 0 0 0 36 253 407 467 518 534 504 470 407 331 134 0 0 0 4060 Mar 0 0 0 15 176 349 452 502 496 508 494 460 412 358 234 43 0 0 4498 Apr 0 0 7 149 311 424 496 525 526 510 463 456 396 340 283 148 7 0 5040 May 0 0 111 317 436 521 548 537 552 532 495 478 422 397 337 229 66 0 5976 Jun 0 5 203 389 497 571 623 626 629 615 552 519 473 416 363 313 159 0 6956 Jul 0 0 197 493 642 729 779 794 802 765 704 657 600 545 491 389 193 0 8781 Aug 0 0 30 314 527 626 653 685 701 663 618 580 526 486 420 261 38 0 7128 Sep 0 0 0 126 411 555 626 654 668 666 633 626 550 474 348 72 0 0 6407 Oct 0 0 0 7 214 378 483 540 565 554 515 479 423 315 84 0 0 0 4559 Nov 0 0 0 0 41 257 402 483 487 507 472 405 330 154 1 0 0 0 3540 Dec 0 0 0 0 0 74 244 351 402 399 374 339 249 74 0 0 0 0 2507 Values in Watt hours/meter^2 per hour Dillon, MT. Daily Average Direct Normal Data For 2002 to 2010 Latitude: 45.21 degrees Longitude: 112.64 degrees Altitude: 1590 meters Year\Mth 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 Average 2.99 4.05 3.85 4.91 5.96 6.94 8.78 7.13 6.40 4.65 3.54 2.50 5.15 % SD 21 25 42 15 21 15 8 10 10 13 17 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.