STATION:  PHOENIX DEER VALLEY ARPT (KDVT), AZ

CLIMATOLOGICAL SUMMARY.  Period of Record: Sep 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        |  65.8  68.0  74.7  81.9  93.3 102.3 104.2 101.8  97.9  86.3  74.3  64.2 |   84.6
Avg Min Temp        |  43.7  45.5  50.3  56.1  65.7  74.4  81.2  80.3  74.7  62.9  51.2  42.3 |   60.7
Avg Temperature     |  54.8  56.8  62.5  69.0  79.5  88.3  92.7  91.1  86.3  74.6  62.7  53.2 |   72.6
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    82    85    97   100   110   113   116   111   109   102    93    79 |    116
                    |                                                                         |
    Date of Ext-Day |    31    08    16    28    29    29    21    26    14    01    04    16 |
               -Year|  2003  2006  2007  2007  2000  2001  2006  2001  2000  2003  2001  1998 |
                    |                                                                         |
    Extreme Min Temp|    22    33    32    37    47    57    66    69    58    43    32    28 |     22
                    |                                                                         |
    Date of Ext-Day |    14    05    03    02    01    05    01    31    21    13    30    29 |
               -Year|  2007  2008  2002  1999  1999  1999  2004  2000  2004  2008  2006  2003 |
                    |                                                                         |
Heating Degree Days |   319   234   135    40     2     0     0     0     0    10   124   366 |   1230
Cooling Degree Days |     1     2    57   160   450   700   859   808   640   306    56     1 |   4041
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   1.0   6.2  22.1  29.2  30.8  30.5  27.9  12.6   0.9   0.0 |  161.3
    Max Temp >= 75  |   4.3   6.2  16.1  24.5  30.5  29.9  31.0  31.0  30.0  28.4  15.5   1.8 |  249.2
    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  |   0.8   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   1.0 |    2.0
    Min Temp <= 20  |   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  <= 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  |  28.5  29.7  31.7  30.5  32.8  37.8  54.7  57.5  48.8  38.8  30.6  28.0 |   37.4
Avg Wet Bulb Temp   |  43.5  45.2  48.5  51.1  56.2  61.1  68.9  69.7  64.4  55.7  48.0  42.3 |   54.5
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.05 30.00 29.92 29.86 29.78 29.76 29.78 29.79 29.77 29.86 29.98 30.05 |  29.88
(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   |   1.1   1.4   1.6   1.1   0.5   1.4   5.5   5.2   2.6   1.9   0.8   0.5 |   23.6
    Heavy Fog       |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.1   0.0   0.0 |    0.2
    Fog             |   2.7   2.8   2.3   1.2   0.0   0.1   1.4   1.1   0.7   1.6   1.2   2.4 |   17.4
    Hail            |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.0   0.0 |    0.1
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  1.00  1.16  0.90  0.48  0.11  0.05  1.00  0.88  0.65  0.63  0.56  0.68 |   8.09
                    |                                                                         |
Maximum Daily       |  1.40  2.24  1.41  1.75  0.68  0.24  1.56  1.53  1.09  0.75  1.86  0.99 |   2.24
                    |                                                                         |
    Date of Ext-Day |    27    13    11    02    23    02    26    24    03    22    30    29 |
               -Year|  2008  2003  2006  2004  2008  1999  2005  2006  2005  2000  2007  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   3.7   4.8   3.6   2.1   0.7   0.5   3.9   4.5   3.1   2.8   2.5   3.6 |   35.8
    >= 0.10         |   1.6   2.7   1.6   1.2   0.3   0.3   2.2   1.9   1.5   1.9   1.0   2.1 |   18.4
    >= 0.25         |   1.2   1.3   1.0   0.4   0.1   0.0   1.0   0.9   0.9   1.1   0.6   1.0 |    9.5
    >= 0.50         |   0.6   0.7   0.7   0.2   0.1   0.0   0.7   0.4   0.5   0.3   0.2   0.3 |    4.6
    >= 1.00         |   0.3   0.1   0.2   0.1   0.0   0.0   0.2   0.3   0.1   0.0   0.2   0.0 |    1.5
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.8   5.1   5.9   6.9   6.6   6.7   6.9   6.3   6.2   5.6   4.8   4.4 |    5.8
Daily Avg Max 2-Min |  14.6  15.6  16.6  18.4  17.9  18.6  20.6  19.5  17.4  15.5  14.3  14.2 |   16.9
Daily Avg Peak Gust |  17.3  18.7  20.4  23.3  23.0  24.0  26.3  24.7  21.6  18.9  17.2  17.0 |   21.0
                    |                                                                         |
Maximum Daily Avg   |  15.6  14.3  13.7  15.6  15.0  13.6  12.3  11.7  12.7  15.7  14.2  12.5 |   15.7
                    |                                                                         |
Maximum 2-Minute Avg|    30    44    33    47    36    43    56    45    48    35    30    32 |     56
                    |                                                                         |
Date of Max 2min-Day|    21    21    27    28    13    07    14    10    03    05    22    20 |
               -Year|  1999  2000  2007  2007  2008  2006  2002  1999  2006  2006  2003  2002 |
                    |                                                                         |
Maximum Peak Gust   |    40    49    43    60    45    54    72    55    58    43    39    43 |     72
                    |                                                                         |
Date of Max Gust-Day|    21    21    27    28    13    23    14    10    03    21    09    25 |
               -Year|  1999  2000  2007  2007  2008  2005  2002  1999  2006  2007  1998  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   0.9   1.9   2.8   4.9   3.9   3.9   8.0   6.6   3.8   2.1   1.5   1.6 |   41.8
   Peak Gust >=40   |   0.1   0.4   0.2   1.2   0.5   0.5   2.9   2.0   1.0   0.4   0.0   0.2 |    9.4
   Peak Gust >=50   |   0.0   0.0   0.0   0.4   0.0   0.1   1.0   0.9   0.2   0.0   0.0   0.0 |    2.6
                    |                                                                         |
   Max 2-Minute >=30|   0.3   0.6   0.8   1.9   0.6   0.7   3.6   2.8   1.5   0.4   0.1   0.0 |   13.2
   Max 2-Minute >=40|   0.0   0.1   0.0   0.2   0.0   0.1   0.8   0.5   0.1   0.0   0.0   0.0 |    1.8
                    |                                                                         |
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Observations of WEATHER may me innacurate due to early ASOS inconsistancies.  Average days
with Thunderstorms may be low due to poor 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.