Portland-PSU, OR. Diffuse Values Portland-PSU, OR. Hourly Average Diffuse Values For 2004 to 2013 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 1 23 61 95 112 113 104 82 49 15 0 0 0 0 657 Feb 0 0 0 0 13 57 106 144 164 167 153 129 93 49 9 0 0 0 1085 Mar 0 0 0 9 53 112 163 199 218 220 204 182 142 89 38 3 0 0 1633 Apr 0 0 8 50 111 172 221 251 260 259 243 217 175 126 76 23 1 0 2192 May 0 2 33 83 145 195 227 252 270 273 258 227 191 146 101 51 9 0 2465 Jun 0 6 40 91 152 207 241 263 271 277 261 233 197 156 112 64 20 1 2591 Jul 0 3 30 73 122 160 192 207 210 196 181 155 136 113 85 54 17 0 1935 Aug 0 0 12 52 103 152 183 201 215 199 182 157 126 101 71 33 4 0 1790 Sep 0 0 1 26 76 123 159 175 177 166 156 137 110 75 35 5 0 0 1421 Oct 0 0 0 6 43 91 137 166 168 162 144 118 78 36 5 0 0 0 1154 Nov 0 0 0 0 12 48 89 116 130 127 108 81 43 9 0 0 0 0 764 Dec 0 0 0 0 2 24 57 87 101 100 86 65 32 4 0 0 0 0 558 Values in Watt hours/meter^2 per hour Portland-PSU, OR. Daily Average Diffuse Values For 2004 to 2013 Latitude: 45.51 degrees Longitude: 122.69 degrees Altitude: 70 meters Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly 2004 ---- 1.42* 1.74 2.03 2.84 2.14 2.09 1.76 1.71 1.08 0.83 0.59* ---- 2005 0.80 0.89 1.51 2.23 2.59 2.83 1.83 1.49 1.26 1.34 0.70 0.51 1.50 2006 0.60 1.10 1.72 2.04 2.30 2.57 1.75 1.78 1.32 1.07 0.71 0.68 1.47 2007 0.63 1.06 1.57 2.34 2.66 2.84 2.15 1.83 1.45 1.25 0.73 0.53 1.59 2008 0.62 1.15 1.76 2.37 2.38 2.28 1.98 1.96 1.32 1.21 0.75 0.55 1.52 2009 0.69 1.10 1.62 2.15 2.01 2.65 1.86 1.93 1.57 1.23 0.80 0.49 1.51 2010 0.61 1.16* 1.54 ---- 2.79 2.45 1.81 1.75 1.57 1.04 0.74 0.52 ---- 2011 0.68 1.03 1.62 2.07 2.41 2.77 2.08 1.65 1.39 1.29 0.80 0.53 1.53 2012 0.69 1.07 1.51 2.26 2.52 2.86 2.19 1.70 1.25 0.98 0.81 0.59 1.54 2013 0.65 1.13 1.73 2.23 2.26 2.49 1.62 2.07 1.44 1.04 0.78 0.62 1.50 Average 0.66 1.11 1.63 2.19 2.48 2.59 1.93 1.79 1.43 1.15 0.76 0.56 1.53 % SD 10 12 6 6 10 10 10 9 11 11 6 10 2 Values in average daily KWhr/meter^2 per Day * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.