Portland-PSU, OR. Ambient Temperature Portland-PSU, OR. Hourly Average Ambient Temperature For 2004 to 2010 Latitude: 45.51 degrees Longitude: 122.69 degrees Altitude: 70 meters Mon\Hr 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 Avg Jan 5.2 5.1 5.0 4.9 4.8 4.8 4.7 4.8 5.1 5.7 6.4 7.0 7.5 7.9 8.0 7.8 7.2 6.8 6.4 6.2 6.0 5.8 5.5 5.3 6.0 Feb 6.2 5.9 5.8 5.6 5.5 5.3 5.2 5.3 6.0 6.9 8.1 9.1 10.0 10.6 10.9 10.8 10.3 9.3 8.6 8.1 7.6 7.3 7.0 6.6 7.6 Mar 7.8 7.4 7.2 6.9 6.7 6.6 6.6 7.0 8.0 9.1 10.3 11.2 12.0 12.7 12.9 13.0 12.6 11.8 10.7 10.0 9.4 8.9 8.4 8.0 9.4 Apr 9.1 8.7 8.3 8.0 7.8 7.8 8.1 9.1 10.2 11.5 12.7 13.8 14.6 15.3 15.6 15.6 15.3 14.7 13.5 12.3 11.5 10.8 10.2 9.7 11.4 May 12.3 11.8 11.4 11.1 10.9 11.1 11.7 12.7 13.9 15.2 16.4 17.6 18.4 19.1 19.5 19.5 19.3 18.7 17.6 16.2 15.1 14.3 13.6 12.9 15.0 Jun 14.5 14.0 13.6 13.3 13.1 13.5 14.2 15.1 16.2 17.3 18.5 19.6 20.6 21.3 21.7 22.0 21.7 21.2 20.4 19.0 17.6 16.7 15.9 15.2 17.3 Jul 17.8 17.2 16.6 16.2 15.8 16.1 16.8 17.8 19.0 20.5 22.0 23.5 24.9 26.0 26.9 27.4 27.3 26.7 25.5 23.7 22.0 20.7 19.6 18.7 21.2 Aug 17.5 17.0 16.5 16.1 15.8 15.8 16.2 17.2 18.3 19.7 21.1 22.7 24.1 25.2 26.1 26.4 26.4 25.6 24.1 22.3 21.1 19.9 19.0 18.1 20.5 Sep 15.2 14.8 14.4 14.0 13.7 13.6 13.8 14.7 16.0 17.4 18.9 20.3 21.5 22.4 22.9 23.1 22.7 21.3 19.7 18.7 17.9 17.1 16.4 15.7 17.7 Oct 11.2 11.0 10.7 10.5 10.4 10.4 10.4 10.8 11.6 12.6 13.8 14.7 15.7 16.3 16.6 16.5 15.6 14.4 13.7 13.1 12.7 12.2 11.8 11.4 12.8 Nov 7.6 7.5 7.3 7.2 7.1 7.1 7.1 7.2 7.7 8.4 9.2 9.9 10.5 10.8 10.9 10.5 9.8 9.2 8.8 8.5 8.2 8.0 7.9 7.7 8.5 Dec 4.4 4.3 4.3 4.1 4.0 4.0 4.0 4.0 4.2 4.7 5.4 6.0 6.4 6.7 6.7 6.3 5.8 5.5 5.3 5.1 4.9 4.8 4.6 4.5 5.0 Values in Degrees Celsius Portland-PSU, OR. Daily Average Ambient Temperature For 2004 to 2010 Latitude: 45.51 degrees Longitude: 122.69 degrees Altitude: 70 meters Year\Mth Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Yearly 2004 ---- 8.9* 11.3 13.8 15.2 18.7 21.9 21.4 16.9 13.6 8.7 5.5* ---- 2005 6.9 7.7 11.2 11.6 15.8 16.4 21.1 21.1 16.9 13.5 7.5 5.1 12.9 2006 8.0 6.6 8.3 12.1 15.7 18.8 21.2 20.0 18.3 12.6 8.7 5.5 13.0 2007 4.4 7.4 10.6 11.5 15.0 17.1 21.3 19.9 17.0 11.8 7.8 5.5 12.5 2008 3.9 7.7 7.2 9.0 14.9 16.2 20.2 20.4 18.4 12.5 10.3 3.5 12.0 2009 4.8 6.2 7.3 11.2 15.6 18.0 22.5 20.3 18.9 12.6 8.9 3.6 12.5 2010 8.4 9.4 9.8 10.8 12.9 16.1 20.2 20.3 17.9 13.4 7.9 6.5 12.8 Average 6.1 7.7 9.4 11.4 15.0 17.3 21.2 20.5 17.7 12.8 8.5 5.0 12.8 % SD 32 15 19 13 7 7 4 3 5 5 11 21 3 Values in average daily Degrees Celsius * Less than 15 days of data in month. Univ. of Oregon Solar Radiation Monitoring Lab.