Seattle, WA. Global Data Seattle, WA. Hourly Average Global Data For 2000 to 2013 Latitude: 47.68 degrees Longitude: 122.25 degrees Altitude: 20 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 1 23 72 121 153 165 149 108 57 11 0 0 0 0 860 Feb 0 0 0 0 15 74 159 234 286 301 276 221 142 61 7 0 0 0 1777 Mar 0 0 0 12 66 149 239 326 376 392 366 305 225 130 42 2 0 1 2630 Apr 0 0 12 67 164 282 389 474 540 546 506 438 332 220 109 27 1 0 4107 May 0 5 47 135 239 361 466 558 608 622 581 510 409 296 174 71 10 0 5091 Jun 0 11 65 153 264 376 489 590 649 668 637 559 454 347 231 113 28 1 5634 Jul 0 6 57 152 268 395 521 634 711 736 712 644 544 401 265 126 27 0 6199 Aug 0 0 21 100 215 343 470 585 652 683 645 560 454 324 180 59 4 0 5296 Sep 0 0 2 42 136 246 362 458 512 531 493 411 304 177 61 5 0 0 3739 Oct 0 0 0 7 51 127 210 282 326 328 288 219 135 49 4 0 0 0 2026 Nov 0 0 0 0 11 56 115 162 189 193 164 111 50 6 0 0 0 0 1056 Dec 0 0 0 0 1 21 65 108 135 139 117 77 30 2 0 0 0 0 695 Values in Watt hours/meter^2 per hour Seattle, WA. Daily Average Global Data For 2000 to 2013 Latitude: 47.68 degrees Longitude: 122.25 degrees Altitude: 20 meters Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly 2000 1.00 1.71 2.46 4.39 4.76 5.63 5.88 5.25 3.60 ---- 1.25 0.72 ---- 2001 0.95 2.27 3.13* 4.20 5.50 5.47 6.16 5.17 3.59 1.81 0.90 0.75 3.33 2002 0.67 1.84 2.24 3.88 4.80 6.10 6.17 5.74 4.15 2.13 1.21 0.66 3.31 2003 0.96 1.71 2.38 3.68 5.24 6.23 7.11 5.79 3.95 1.89 1.19 0.64 3.41 2004 0.75 1.58 2.66 5.09 4.75 6.57 6.05 5.19 3.33 2.08 0.99 0.64 3.31 2005 0.98 2.51 3.16 4.41 4.82 5.04 ---- ---- 3.76 1.94 0.95 0.83 ---- 2006 0.62 1.98 2.99 4.30 5.36 5.95 6.35 5.62 4.03 2.26 0.82 0.76 3.42 2007 1.02 1.52 2.28 4.17 5.67 5.70 6.11 5.06 3.50 1.77 1.20 0.59 3.22 2008 0.95 1.68 2.52 3.92 4.28 4.97 6.03 4.79 3.93 2.06 0.95 0.66 3.06 2009 0.88 1.82 2.55 4.21 5.75 6.21 6.51 4.92 3.95 2.48 ---- ---- ---- 2010 ---- 1.71* 2.48 3.81 4.73 5.07 6.05 4.71 3.00 2.37 1.01 0.80 ---- 2011 0.80 1.66 2.42 3.68 4.85 5.01 5.71 5.60 3.93 1.80 1.12 0.71 3.11 2012 0.77 1.50 2.51 4.28 5.49 4.60 5.76 5.75 4.50 2.07 0.99 0.55 3.23 2013 0.83 1.34 2.86 3.57 5.26 6.09 6.65 5.25 3.05 1.90 1.11 0.74 3.23 Average 0.86 1.77 2.62 4.11 5.09 5.62 6.20 5.30 3.73 2.04 1.05 0.69 3.26 % SD 15 17 11 10 9 11 6 7 11 11 13 12 4 Values in average daily KWhr/meter^2 per Day * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.