STATION:  VAN NUYS AIRPORT (KVNY), 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        |  66.6  66.3  70.3  71.8  78.3  83.5  90.5  91.5  87.6  80.2  73.1  66.8 |   77.2
Avg Min Temp        |  44.8  45.3  47.9  49.6  55.4  59.2  63.9  63.9  60.8  55.2  48.5  43.7 |   53.2
Avg Temperature     |  55.7  55.8  59.1  60.7  66.8  71.3  77.2  77.7  74.2  67.7  60.8  55.3 |   65.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    92    87    93   101   103   110   112   108   110   101    95    88 |    112
                    |                                                                         |
    Date of Ext-Day |    31    22    11    27    03    20    22    30    02    13    07    02 |
               -Year|  2003  2002  2007  2004  2004  2008  2006  1998  2007  1999  2006  2003 |
                    |                                                                         |
    Extreme Min Temp|    26    33    32    37    46    47    56    57    51    46    31    28 |     26
                    |                                                                         |
    Date of Ext-Day |    14    01    12    04    01    04    27    08    28    30    30    22 |
               -Year|  2007  2002  2006  1999  1999  1999  1999  1999  1998  2000  2004  1998 |
                    |                                                                         |
Heating Degree Days |   295   266   202   163    44     8     0     0     3    39   154   306 |   1480
Cooling Degree Days |     8     6    19    34   100   197   378   391   274   123    28     4 |   1563
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.1   0.0   0.7   1.7   4.0   7.2  17.5  18.7  12.5   6.7   1.0   0.0 |   70.2
    Max Temp >= 75  |   6.5   5.0  10.7  10.4  19.0  25.6  31.0  30.9  27.3  20.7  12.0   6.4 |  205.5
    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  |   0.2   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.2 |    0.6
    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  |  34.8  37.9  41.5  43.8  50.1  54.6  57.3  55.8  53.4  46.7  39.4  33.3 |   45.7
Avg Wet Bulb Temp   |  46.4  47.5  50.2  51.8  57.0  60.9  64.4  63.8  61.4  56.0  50.3  45.6 |   54.6
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.08 30.05 30.00 29.97 29.91 29.88 29.89 29.88 29.86 29.93 30.03 30.09 |  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   |   4.4   4.3   3.5   2.2   3.2   1.6   1.7   1.0   1.5   1.7   3.1   2.7 |   30.9
    Heavy Fog       |   1.1   1.0   2.2   0.1   0.1   0.1   0.0   0.4   0.5   1.6   1.1   0.6 |    8.8
    Fog             |  10.8  11.3  13.9  10.6  13.7  14.6  10.1   8.7  10.5  13.4  10.0   9.0 |  136.6
    Hail            |   0.1   0.2   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    0.5
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  2.17  3.58  1.23  1.01  0.25  0.05  0.00  0.03  0.13  0.65  0.62  0.96 |  10.67
                    |                                                                         |
Maximum Daily       |  2.83  3.20  1.48  1.98  0.92  0.21  0.02  0.30  0.59  1.23  1.18  2.57 |   3.20
                    |                                                                         |
    Date of Ext-Day |    10    12    28    04    03    02    23    29    22    17    26    28 |
               -Year|  2001  2003  2006  2006  2003  1999  2007  2000  2007  2005  2008  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   5.0   6.9   4.4   3.6   1.3   0.5   0.1   0.1   0.8   2.7   3.3   4.9 |   33.5
    >= 0.10         |   3.1   5.1   2.2   1.7   0.7   0.2   0.0   0.1   0.3   1.5   1.5   1.7 |   18.0
    >= 0.25         |   2.2   3.8   1.6   1.2   0.3   0.0   0.0   0.1   0.2   0.8   0.8   1.1 |   12.1
    >= 0.50         |   1.7   2.2   0.9   0.6   0.2   0.0   0.0   0.0   0.1   0.5   0.5   0.5 |    7.2
    >= 1.00         |   0.6   1.2   0.2   0.2   0.0   0.0   0.0   0.0   0.0   0.2   0.1   0.2 |    2.6
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   6.3   5.6   5.5   5.5   5.5   5.4   5.2   4.7   4.3   4.4   4.8   5.9 |    5.3
Daily Avg Max 2-Min |  16.9  16.5  16.4  15.8  14.9  14.2  14.1  13.6  13.4  14.0  14.9  16.6 |   15.1
Daily Avg Peak Gust |  21.1  20.5  20.5  19.8  18.3  17.4  17.2  16.6  16.7  17.3  18.4  20.8 |   18.7
                    |                                                                         |
Maximum Daily Avg   |  24.1  20.6  22.6  19.4  17.2   8.8   7.9   7.4  14.0  22.1  18.3  21.5 |   24.1
                    |                                                                         |
Maximum 2-Minute Avg|    43    33    41    38    31    30    22    18    29    39    36    44 |     44
                    |                                                                         |
Date of Max 2min-Day|    06    23    27    12    21    06    11    02    03    20    26    14 |
               -Year|  2003  2007  2003  2007  2008  2007  1999  2000  1998  2007  2002  2001 |
                    |                                                                         |
Maximum Peak Gust   |    49    44    52    53    41    38    35    24    37    49    45    51 |     53
                    |                                                                         |
Date of Max Gust-Day|    06    23    27    12    21    06    17    30    28    20    21    14 |
               -Year|  2003  2007  2003  2007  2008  2007  2006  2005  2005  2007  1999  2001 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   6.9   4.2   4.7   2.2   1.4   0.5   0.1   0.0   0.5   2.0   4.4   6.8 |   33.6
   Peak Gust >=40   |   1.1   0.5   0.8   0.1   0.1   0.0   0.0   0.0   0.0   0.5   0.5   1.0 |    4.6
   Peak Gust >=50   |   0.0   0.0   0.1   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    0.3
                    |                                                                         |
   Max 2-Minute >=30|   2.2   1.2   1.2   0.4   0.2   0.1   0.0   0.0   0.0   0.5   0.9   0.0 |    6.6
   Max 2-Minute >=40|   0.1   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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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.