STATION:  LANCASTER-GENERAL WILLIAM J. FOX AIRFIELD AIRPORT

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 1996 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        |  58.8  60.3  68.4  71.5  83.1  91.1  98.3  98.3  90.5  79.4  67.5  57.5 |   77.0
Avg Min Temp        |  30.7  33.9  39.5  44.0  54.5  61.9  67.4  64.3  56.0  45.9  36.7  29.2 |   47.0
Avg Temperature     |  44.7  47.1  53.9  57.7  68.8  76.5  82.9  81.3  73.2  62.7  52.1  43.3 |   62.0
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    78    81    91    96   106   107   113   109   107    97    85    76 |    113
                    |                                                                         |
    Date of Ext-Day |    31    05    22    28    28    06    05    05    01    03    04    22 |
               -Year|  2003  2001  2004  2007  2003  2002  2007  1998  2007  2001  1999  2005 |
                    |                                                                         |
    Extreme Min Temp|     3    14    17    27    36    44    51    50    39    27    15     8 |      3
                    |                                                                         |
    Date of Ext-Day |    14    06    04    10    02    10    22    16    21    27    30    22 |
               -Year|  2007  2003  2002  1999  2008  2002  1999  1999  2004  2006  2004  1998 |
                    |                                                                         |
Heating Degree Days |   629   506   346   239    59     8     0     0     9   120   388   672 |   2975
Cooling Degree Days |     0     0     3    21   176   353   553   506   255    48     0     0 |   1917
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.2   1.3  10.2  18.8  28.2  28.9  18.6   4.7   0.0   0.0 |  110.8
    Max Temp >= 75  |   0.1   1.5   9.2  12.3  23.9  28.3  31.0  31.0  27.7  22.0   6.2   0.3 |  193.5
    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  |  18.3  11.8   5.5   1.1   0.0   0.0   0.0   0.0   0.0   0.4   8.9  20.4 |   66.4
    Min Temp <= 20  |   3.3   1.7   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.5   4.8 |   10.6
    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  |  26.4  28.7  32.4  34.1  37.3  38.3  44.4  42.1  37.4  32.6  29.8  26.1 |   34.1
Avg Wet Bulb Temp   |  36.6  39.1  44.2  46.7  52.6  55.8  60.5  59.4  54.5  48.2  42.1  36.4 |   48.0
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.17 30.09 30.04 29.97 29.89 29.85 29.87 29.88 29.89 29.98 30.10 30.16 |  29.99
(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   |   0.5   0.5   0.5   0.5   0.5   0.0   0.9   0.6   0.3   0.5   0.1   0.2 |    5.1
    Heavy Fog       |   0.3   0.1   0.0   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.3   0.1 |    0.9
    Fog             |   3.7   4.3   3.4   2.0   0.3   0.0   0.0   0.0   0.2   2.1   2.5   2.4 |   20.9
    Hail            |   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
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  1.37  2.09  0.48  0.54  0.15  0.02  0.09  0.02  0.15  0.43  0.43  0.84 |   6.59
                    |                                                                         |
Maximum Daily       |  1.56  2.67  0.90  1.63  0.49  0.16  0.72  0.14  0.80  1.07  0.99  1.20 |   2.67
                    |                                                                         |
    Date of Ext-Day |    10    12    05    17    05    01    12    31    20    17    26    06 |
               -Year|  2005  2003  2000  2000  2005  1999  1999  1998  2005  2005  2008  1997 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   5.9   6.0   3.6   3.1   1.2   0.2   0.6   0.4   0.7   2.1   2.5   4.9 |   31.2
    >= 0.10         |   3.0   3.7   1.7   1.4   0.5   0.1   0.2   0.1   0.3   0.9   1.1   1.7 |   14.7
    >= 0.25         |   1.9   2.7   0.4   0.5   0.2   0.0   0.1   0.0   0.2   0.5   0.5   0.9 |    8.0
    >= 0.50         |   1.0   1.2   0.3   0.2   0.0   0.0   0.1   0.0   0.2   0.4   0.2   0.6 |    4.1
    >= 1.00         |   0.3   0.6   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.3 |    1.4
                    |                                                                         |
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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   9.2  11.7  14.1  14.1  14.6  12.7  11.6   9.7   9.1   8.0   8.1 |   10.9
Daily Avg Max 2-Min |  19.3  22.1  25.5  27.7  28.4  27.9  26.0  24.9  23.0  21.8  20.3  19.8 |   23.9
Daily Avg Peak Gust |  22.8  26.1  30.0  33.0  33.8  33.2  31.5  29.9  27.7  25.9  23.8  23.6 |   28.4
                    |                                                                         |
Maximum Daily Avg   |  22.3  24.4  26.6  31.4  27.8  26.8  22.6  23.5  24.4  27.8  27.1  24.6 |   31.4
                    |                                                                         |
Maximum 2-Minute Avg|    41    64    48    45    53    48    36    35    39    51    44    53 |     64
                    |                                                                         |
Date of Max 2min-Day|    29    26    27    22    04    12    03    20    17    17    22    21 |
               -Year|  2001  2008  2007  2004  2007  2001  2001  2002  2002  2007  2001  2008 |
                    |                                                                         |
Maximum Peak Gust   |    48    82    58    52    62    58    52    40    46    59    48    83 |     83
                    |                                                                         |
Date of Max Gust-Day|    29    26    27    15    04    12    03    26    17    17    22    26 |
               -Year|  2001  2008  2007  2008  2007  2001  2001  2004  2002  2007  2001  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   8.2   9.9  16.8  20.6  23.3  23.7  21.9  17.1  12.0  10.2   8.7   9.9 |  182.3
   Peak Gust >=40   |   2.0   2.3   3.4   4.7   4.8   3.9   0.8   0.1   0.9   1.4   2.1   2.0 |   28.5
   Peak Gust >=50   |   0.0   0.1   0.4   0.1   0.6   0.3   0.1   0.0   0.0   0.3   0.0   0.6 |    2.5
                    |                                                                         |
   Max 2-Minute >=30|   4.0   5.9   9.2  12.7  11.8  10.1   4.6   2.8   3.3   4.6   5.0   0.0 |   74.1
   Max 2-Minute >=40|   0.3   0.4   0.9   1.3   1.5   0.4   0.0   0.0   0.0   0.6   0.3   0.0 |    5.6
                    |                                                                         |
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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.