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    Solar Data - Lynchburg, VA


    Average Climate Conditions
    Solar Radiation Data
    Altitude and Azimuth of the Sun


    Average Climate Conditions
        Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
    Element
    Units                          
    Average Temperature °F 34.2 37.2 46.4 55.7 64.1 71.7 75.6 74.6 68.1 57.0 47.7 38.4 55.9
    Daily Minimum °F 24.7 27.4 35.4 43.8 52.6 60.8 65.1 64.4 57.7 45.7 37.3 29.1 45.3
    Daily Maximum °F 43.6 47.1 57.3 67.6 75.6 82.6 86.0 84.9 78.5 68.3 58.1 47.6 66.4
    Record Low °F -10 0 7 20 31 40 49 45 36 21 8 -4 -10
    Record High °F 76 79 87 92 93 100 103 102 101 93 83 78 103
    Heating Degree Days note a 955 778 577 283 95 6 0 0 32 270 519 825 4340
    Cooling Degree Days note a 0 0 0 0 67 207 329 298 125 22 0 0 1048
    Average Humidity Ratio note b 0.28% 0.31% 0.41% 0.56% 0.88% 1.20% 1.38% 1.35% 1.10% 0.72% 0.49% 0.35% 0.75%
    Average Wind Speed mph 7.9 7.9 8.6 8.5 7.0 6.6 6.0 6.0 6.2 6.6 7.3 7.6 7.2
    Clearness note c 50% 52% 53% 54% 54% 56% 54% 54% 53% 53% 49% 48% 53%


    Note:
    1. Heating and cooling degree days calculated from 65 degree (F) base.
    2. expressed as pounds moisture per pound of air.
    3. Average atmospheric clarity to solar transmission, expressed as a percentage.

    Source:
  • National Renewable Energy Laboratory, Solar Radiation Data Manual for Buildings.


  • Average Incident Solar Radiation (Btu/sq.ft./day)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
    Horizontal
    Global 750 1010 1360 1700 1910 2050 1960 1780 1480 1160 810 660 1390
    Std Deviation 51 80 92 140 82 107 125 93 99 91 74 36 30
    Minimum 640 820 1180 1460 1750 1850 1750 1590 1240 1000 640 590 1320
    Maximum 860 1170 1540 2050 2080 2250 2210 1960 1660 1340 950 740 1440
    Diffuse 320 420 540 670 800 860 860 770 630 450 340 290 580
    North
    Global 210 280 350 450 550 620 590 490 390 310 230 190 390
    Diffuse 210 280 350 430 500 540 520 470 390 310 230 190 370
    East
    Global 500 650 820 980 1050 1110 1060 990 870 730 540 450 810
    Diffuse 260 340 430 530 600 640 630 580 490 380 280 230 450
    South
    Global 1180 1230 1180 1000 820 750 780 920 1090 1260 1190 1110 1040
    Diffuse 360 430 490 540 560 570 570 570 530 470 390 340 480
    West
    Global 510 650 840 990 1040 1100 1040 1000 870 740 540 450 810
    Diffuse 260 340 440 540 610 650 640 590 490 380 280 240 460


    Average Clear Day Incident Solar Radiation (Btu/sq.ft./day)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
    Horizontal Global 1020 1370 1820 2260 2520 2610 2530 2280 1890 1430 1050 900 1810
    North Global 200 260 330 430 580 680 620 480 370 290 220 180 390
    East Global 740 940 1160 1340 1410 1420 1380 1300 1150 940 750 670 1100
    South Global 1960 1990 1760 1340 1000 850 900 1160 1530 1800 1870 1890 1500
    West Global 740 940 1160 1340 1410 1420 1380 1300 1150 940 750 670 1100


    Average Transmitted Solar Radiation (Btu/sq.ft./day)
      Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
    Horizontal
    Unshaded 490 700 970 1230 1390 1490 1430 1290 1060 820 550 430 990
    North
    Unshaded 150 190 250 300 360 400 380 330 270 210 160 130 260
    Shaded 130 170 220 280 330 370 350 300 250 190 140 120 240
    East
    Unshaded 340 460 580 700 750 780 750 700 620 510 370 310 570
    Shaded 310 420 520 620 650 690 660 620 550 460 340 280 510
    South
    Unshaded 880 900 810 640 500 450 470 580 730 900 880 840 710
    Shaded 870 840 660 440 350 360 360 400 550 800 860 820 610
    West
    Unshaded 350 460 590 710 740 780 740 710 620 520 370 310 580
    Shaded 320 420 530 620 650 680 650 620 550 470 340 280 510


    Shading Geometry in Dimensionless Units
    Window

    1

    Horizontal Overhang (h):

    0.458

    Verical Gap (v):

    0.305



    Note:
    • Incident and transmitted radiation values are based on 30-year (1961-1990) averages for each month.
    • For explanation of shading geometry, see solar_shading.asp

    Source:
  • National Renewable Energy Laboratory, Solar Radiation Data Manual for Buildings.


  • Altitude of the Sun
      15-Jan 15-Feb 15-Mar 15-Apr 15-May 15-Jun 15-Jul 15-Aug 15-Sep 15-Oct 15-Nov 15-Dec
    Time of Day
    4:00           -9.8 -12          
    5:00       -8.9 -2.2 0.5 -2.2 -6.9        
    6:00     -6.4 2.9 9.0 10.8 8.7 4.5 0 -5.7 -11.3  
    7:00 -6.3 -2.0 5.7 14.6 20.5 22.1 20.1 16.1 11.4 6.1 0.4 -5.0
    8:00 4.6 9.4 17.3 26.4 32.4 33.9 31.9 28.0 23.1 17.2 10.5 5.4
    9:00 14.1 19.7 28.3 38.0 44.2 45.8 43.7 39.8 34.2 27.3 19.7 14.5
    10:00 22.2 28.8 38.1 48.7 55.6 57.5 55.4 50.9 44.2 35.8 27.2 21.9
    11:00 28.1 35.7 45.9 57.5 65.6 68.3 66.1 60.4 51.8 41.7 32.2 27.0
    12:00 31.2 39.5 50.1 62.2 71.3 75.4 73.3 66.1 55.4 44.0 34.0 29.3
    13:00 31.0 39.6 49.8 60.8 68.9 73.2 72.1 65.0 53.8 42.0 32.4 28.3
    14:00 27.5 35.9 45.0 54.0 60.2 63.9 63.6 57.8 47.5 36.4 27.4 24.2
    15:00 21.3 29.0 36.8 44.2 49.3 52.5 52.6 47.7 38.3 28.0 20.0 17.6
    16:00 13.0 20.1 26.8 33.0 37.6 40.7 40.8 36.3 27.5 18.0 10.8 9.1
    17:00 3.3 9.7 15.6 21.2 25.7 28.8 28.9 24.4 16.0 7.0 0.7 -0.9
    18:00 -7.7 -1.6 4.1 9.4 14.0 17.2 17.2 12.6 4.2 -4.8 -10.9 -11.7
    19:00     -8.0 -2.4 2.8 6.2 6.0 1.2 -7.8      
    20:00         -8.1 -4.3 -4.8 -10.2        


    Azimuth of the Sun
      15-Jan 15-Feb 15-Mar 15-Apr 15-May 15-Jun 15-Jul 15-Aug 15-Sep 15-Oct 15-Nov 15-Dec
    Time of Day
    4:00           50.4 50.6          
    5:00       70.4 64.1 60.1 60.6 66.4        
    6:00     87.8 79.7 73.0 68.8 69.5 75.7 85.8 96.4 104.7  
    7:00 111.8 104.4 96.9 88.7 81.4 76.9 77.7 84.5 95.0 105.6 113.5 115.6
    8:00 120.9 113.8 106.5 98.0 90.1 85.0 86.1 93.5 104.8 115.6 123.1 124.8
    9:00 131.2 124.5 117.6 108.9 100.1 94.1 95.4 103.9 116.2 127.3 134.3 135.2
    10:00 143.2 137.1 131.1 123.0 113.3 105.8 107.3 117.3 130.8 141.6 147.5 147.4
    11:00 157.2 152.4 148.4 143.0 134.2 125.0 126.0 137.1 150.2 159.1 162.8 161.5
    12:00 172.9 170.3 170.0 171.2 170.4 164.2 161.4 167.3 174.8 179.2 179.6 176.9
    13:00 189.2 189.3 193.4 202.3 212.3 216.2 209.5 202.8 200.6 199.3 196.5 192.6
    14:00 204.8 207.2 214.4 226.9 239.1 244.7 239.7 229.7 222.2 217.0 211.9 207.2
    15:00 218.5 222.6 231.2 243.9 254.9 259.8 256.0 247.1 238.4 231.6 225.2 220.2
    16:00 230.3 235.3 244.3 256.3 265.9 270.0 267.0 259.3 250.9 243.4 236.4 231.3
    17:00 240.4 246.0 255.1 266.4 275.0 278.6 276.0 269.1 261.2 253.5 246.1 240.9
    18:00 249.3 255.5 264.6 275.5 283.5 286.6 284.2 278.0 270.5 262.7 254.8 249.5
    19:00     273.8 284.5 292.1 294.9 292.6 286.9 279.6      
    20:00         301.5 303.9 301.7 296.4        


    Get the data in CSV format

    Note:
  • Altitude are listed in degrees above the horizon. Azimuth values are listed in degrees, referenced to East of North.
  • Negative values indicate the sun is below the horizon
  • For further information, see solar_alt-az.asp

  • Source:
  • U.S.Naval Observatory.




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