STATION:  SAN JOSE INTL APT (KSJC), CA

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 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        |  58.4  61.3  65.8  67.6  73.8  78.4  80.6  80.7  80.0  74.3  65.5  59.1 |   70.5
Avg Min Temp        |  41.3  43.5  45.7  47.5  52.0  55.5  58.2  58.2  56.9  52.2  46.4  41.7 |   49.9
Avg Temperature     |  49.8  52.4  55.8  57.5  62.9  66.9  69.4  69.5  68.4  63.2  56.0  50.4 |   60.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    70    79    86    92    99   106   104   101    99    91    84    75 |    106
                    |                                                                         |
    Date of Ext-Day |    15    22    11    26    30    14    23    28    04    10    01    20 |
               -Year|  2000  2002  2005  2004  2001  2000  2006  2008  2008  1999  2008  1999 |
                    |                                                                         |
    Extreme Min Temp|    27    31    35    36    42    45    50    51    46    41    33    24 |     24
                    |                                                                         |
    Date of Ext-Day |    14    11    28    09    08    08    04    15    30    31    23    24 |
               -Year|  2007  1999  1999  1999  1999  1999  1999  1999  2007  2002  2003  1998 |
                    |                                                                         |
Heating Degree Days |   471   356   289   234   107    30     6     3    14    87   272   453 |   2321
Cooling Degree Days |     0     0     2    10    41    87   142   142   117    32     1     0 |    575
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.3   1.2   2.8   3.4   3.1   4.4   0.6   0.0   0.0 |   15.7
    Max Temp >= 75  |   0.0   0.4   3.7   4.9  11.9  19.4  25.6  26.1  21.6  13.4   1.9   0.1 |  129.0
    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  |   1.5   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.1 |    2.8
    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  |  39.9  42.3  43.2  43.9  48.0  51.1  55.4  54.9  52.3  47.4  44.5  40.0 |   46.9
Avg Wet Bulb Temp   |  44.6  47.4  49.1  50.2  54.3  57.5  60.4  60.2  58.6  54.2  49.8  45.2 |   52.6
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.16 30.09 30.08 30.04 29.98 29.94 29.95 29.94 29.91 30.00 30.10 30.14 |  30.03
(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   |   0.2   0.4   0.3   0.1   0.1   0.0   0.0   0.7   1.4   1.2   1.5   0.3 |    6.2
    Heavy Fog       |   1.7   0.7   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.2   1.3   1.4 |    5.4
    Fog             |  17.3  12.4   9.6   7.3   4.5   2.4   4.6   5.5   6.1   7.5  12.2  15.1 |  104.4
    Hail            |   0.0   0.0   0.1   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  2.42  2.64  1.48  1.09  0.30  0.06  0.01  0.01  0.05  0.61  1.16  2.22 |  12.05
                    |                                                                         |
Maximum Daily       |  1.76  1.26  0.74  0.75  0.59  0.18  0.04  0.06  0.18  1.02  0.93  1.24 |   1.76
                    |                                                                         |
    Date of Ext-Day |    24    15    20    13    02    07    31    03    24    12    07    14 |
               -Year|  2000  2005  2006  2003  2003  2000  2000  1999  2001  2007  2002  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  10.2  11.2   8.1   6.6   2.8   0.7   0.4   0.5   1.3   3.4   8.1  10.5 |   63.8
    >= 0.10         |   5.1   7.0   5.2   4.2   0.8   0.3   0.0   0.0   0.1   1.4   2.8   5.3 |   32.1
    >= 0.25         |   2.9   4.2   2.1   1.7   0.4   0.0   0.0   0.0   0.0   0.6   1.5   3.0 |   16.4
    >= 0.50         |   1.5   1.7   0.7   0.3   0.1   0.0   0.0   0.0   0.0   0.5   0.6   1.5 |    7.0
    >= 1.00         |   0.4   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.5 |    1.2
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   5.3   6.3   6.9   7.8   8.0   8.1   7.5   7.1   6.3   5.6   5.1   5.8 |    6.7
Daily Avg Max 2-Min |  14.8  16.7  18.2  19.8  19.7  19.6  17.3  17.1  16.9  16.1  14.5  15.9 |   17.2
Daily Avg Peak Gust |  18.0  20.2  21.9  23.9  23.5  23.4  20.4  20.4  20.0  19.3  17.5  19.5 |   20.7
                    |                                                                         |
Maximum Daily Avg   |  20.5  20.4  18.0  17.1  14.6  13.8  14.3  13.1  15.2  14.2  16.9  20.8 |   20.8
                    |                                                                         |
Maximum 2-Minute Avg|    43    40    37    36    30    30    26    25    26    36    36    39 |     43
                    |                                                                         |
Date of Max 2min-Day|    01    27    13    03    21    13    08    05    18    19    24    19 |
               -Year|  2006  2006  2003  1999  2008  2004  2004  2002  2007  2004  2001  2002 |
                    |                                                                         |
Maximum Peak Gust   |    51    49    45    46    37    36    31    31    33    44    46    49 |     51
                    |                                                                         |
Date of Max Gust-Day|    01    27    13    03    21    07    08    02    21    19    07    15 |
               -Year|  2006  2006  2003  1999  2008  2004  2004  2008  2000  2004  2002  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   2.5   3.4   2.8   3.1   1.8   1.6   0.2   0.2   0.3   1.5   1.3   4.0 |   22.7
   Peak Gust >=40   |   0.4   0.7   0.2   0.2   0.0   0.0   0.0   0.0   0.0   0.2   0.3   0.9 |    2.9
   Peak Gust >=50   |   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
   Max 2-Minute >=30|   0.6   0.8   0.3   0.5   0.1   0.1   0.0   0.0   0.0   0.2   0.3   0.0 |    2.9
   Max 2-Minute >=40|   0.1   0.1   0.0   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.