STATION:  PALMDALE-PRODN FLT/TST AF PLT (KPMD), CA

CLIMATOLOGICAL SUMMARY.  Period of Record: Apr 1998 to Dec 2008

Summaries based on unedited daily ASOS data.  Errors may be present.

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TEMPERATURE (F)     |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Avg Max Temp        |  59.0  61.0  67.6  72.2  82.7  91.3  98.4  98.0  90.5  79.1  67.2  58.3 |   77.1
Avg Min Temp        |  32.1  35.1  39.6  43.6  52.2  59.2  66.4  64.9  57.5  47.6  37.5  30.7 |   47.2
Avg Temperature     |  45.5  48.1  53.6  57.9  67.5  75.3  82.4  81.4  74.0  63.3  52.3  44.5 |   62.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    79    81    90    95   106   106   113   110   105    96    85    87 |    113
                    |                                                                         |
    Date of Ext-Day |    31    28    16    28    28    21    05    05    01    01    07    21 |
               -Year|  2003  1999  2007  2007  2003  2008  2007  1998  2007  1999  2006  2003 |
                    |                                                                         |
    Extreme Min Temp|    10    20    22    26    38    44    48    48    43    31    19    11 |     10
                    |                                                                         |
    Date of Ext-Day |    14    12    04    10    18    03    06    08    25    12    30    24 |
               -Year|  2007  1999  2002  1999  1998  1999  1998  2006  2000  2008  2004  1998 |
                    |                                                                         |
Heating Degree Days |   604   479   356   234    69     9     0     0     9   108   380   637 |   2884
Cooling Degree Days |     0     0     3    22   145   317   540   510   279    57     0     0 |   1872
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.1   1.2   9.7  20.0  29.2  29.1  19.3   3.6   0.0   0.0 |  112.2
    Max Temp >= 75  |   0.1   1.7   8.8  12.8  23.3  28.7  31.0  31.0  28.1  21.9   6.5   0.5 |  194.3
    Max Temp <= 32  |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
                    |                                                                         |
    Min Temp <= 32  |  16.8   9.2   3.8   1.3   0.0   0.0   0.0   0.0   0.0   0.2   6.8  19.7 |   57.9
    Min Temp <= 20  |   1.3   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   1.7 |    3.4
    Min Temp  <= 0  |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
                    |                                                                         |
Avg Dew Point Temp  |  26.7  29.7  32.4  34.2  38.0  40.3  43.9  43.8  41.6  34.1  29.2  25.2 |   34.9
Avg Wet Bulb Temp   |  37.5  40.1  43.9  46.7  52.3  56.5  60.6  60.1  56.3  48.9  41.9  36.5 |   48.4
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.12 30.05 30.00 29.94 29.87 29.83 29.85 29.85 29.85 29.95 30.07 30.14 |  29.96
(Inches of Mercury) |                                                                         |
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                    |                                                                         |
WEATHER             |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
See disclaimer below|                                                                         |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Thunderstorms   |   0.3   0.5   0.3   0.5   0.4   0.3   1.7   1.1   0.5   0.6   0.1   0.4 |    6.7
    Heavy Fog       |   0.1   0.0   0.3   0.2   0.0   0.0   0.0   0.0   0.0   0.1   0.2   0.0 |    0.9
    Fog             |   5.2   6.6   4.3   3.5   2.0   0.6   0.1   0.2   1.3   3.1   2.4   4.2 |   33.5
    Hail            |   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.0   0.0   0.1 |    0.2
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.76  1.69  0.47  0.29  0.16  0.04  0.05  0.03  0.12  0.56  0.34  0.73 |   5.25
                    |                                                                         |
Maximum Daily       |  0.90  2.79  0.95  0.54  0.29  0.26  0.42  0.09  0.64  2.14  0.76  2.10 |   2.79
                    |                                                                         |
    Date of Ext-Day |    09    12    15    14    13    02    13    29    20    17    26    28 |
               -Year|  2005  2003  2003  2003  1998  1999  1999  2000  2005  2005  2008  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   4.5   5.8   3.6   2.7   1.3   0.4   0.6   0.9   1.0   1.6   2.4   4.4 |   29.2
    >= 0.10         |   2.0   3.0   1.5   0.9   0.8   0.2   0.1   0.0   0.4   0.7   1.2   1.2 |   11.9
    >= 0.25         |   0.9   2.1   0.5   0.4   0.2   0.1   0.1   0.0   0.1   0.5   0.2   0.7 |    5.8
    >= 0.50         |   0.4   1.0   0.1   0.1   0.0   0.0   0.0   0.0   0.1   0.5   0.2   0.5 |    2.8
    >= 1.00         |   0.0   0.4   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.2 |    0.7
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   7.5   8.7  10.2  11.8  11.9  11.9  10.7   9.6   8.4   8.3   7.2   7.7 |    9.5
Daily Avg Max 2-Min |  19.0  21.4  24.0  25.4  25.3  25.4  24.2  23.2  20.9  20.2  18.4  19.6 |   22.2
Daily Avg Peak Gust |  22.4  25.4  28.6  30.5  30.5  30.5  29.0  27.9  25.2  24.2  21.6  23.1 |   26.6
                    |                                                                         |
Maximum Daily Avg   |  24.6  22.8  23.5  26.8  24.4  25.0  21.7  16.5  21.0  23.2  21.5  21.9 |   26.8
                    |                                                                         |
Maximum 2-Minute Avg|    47    46    48    47    53    49    38    44    37    43    40    46 |     53
                    |                                                                         |
Date of Max 2min-Day|    02    03    20    21    04    12    13    31    22    17    22    27 |
               -Year|  2006  2008  2000  1999  2007  2001  1999  1998  2000  2007  2001  2006 |
                    |                                                                         |
Maximum Peak Gust   |    53    59    55    54    62    55    46    55    44    49    46    56 |     62
                    |                                                                         |
Date of Max Gust-Day|    02    03    20    12    04    12    13    31    19    17    22    16 |
               -Year|  2006  2008  2000  2007  2007  2001  1999  1998  2007  2007  2001  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   7.0   9.6  14.8  16.8  16.4  17.4  13.6  11.7   6.6   7.8   7.0   8.7 |  137.4
   Peak Gust >=40   |   1.8   2.1   2.7   2.9   2.3   1.2   0.2   0.4   0.3   1.7   1.0   2.5 |   19.1
   Peak Gust >=50   |   0.1   0.1   0.3   0.3   0.1   0.2   0.0   0.2   0.0   0.0   0.0   0.6 |    1.8
                    |                                                                         |
   Max 2-Minute >=30|   3.6   5.4   6.8   7.2   5.9   4.9   1.9   1.5   1.0   3.1   3.2   0.0 |   44.6
   Max 2-Minute >=40|   0.1   0.2   0.7   0.7   0.5   0.3   0.0   0.1   0.0   0.3   0.1   0.0 |    3.0
                    |                                                                         |
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Observations of WEATHER may me innacurate due to early ASOS inconsistancies.  Average days
with Thunderstorms may be low due to early mis-detection.

Heavy Fog = Visibility less than or equal to 1/4 mile.
Fog = Visibility greater than 1/4 mile or less than 7 miles.
Peak Gust = Maximum 5-second average.
Snowfall data not observed at ASOS stations.

Copyright ©2009 Western Regional Climate Center - Desert Research Institute - Reno, Nevada.