STATION:  SANTA ANA-J. WAYNE APT (KSNA), CA

CLIMATOLOGICAL SUMMARY.  Period of Record: Feb 1999 to Dec 2008

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

-----------------------------------------------------------------------------------------------

TEMPERATURE (F)     |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Avg Max Temp        |  66.7  66.1  67.3  68.8  71.9  74.5  78.8  79.4  78.8  75.5  71.2  66.3 |   72.1
Avg Min Temp        |  47.2  48.5  51.3  53.5  58.2  61.5  65.0  65.3  63.0  58.6  52.5  46.7 |   56.0
Avg Temperature     |  56.9  57.3  59.3  61.2  65.0  68.0  71.9  72.4  70.9  67.1  61.8  56.5 |   64.0
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    90    90    95    99    98    96    99    92   102    99    94    83 |    102
                    |                                                                         |
    Date of Ext-Day |    31    08    11    27    02    27    22    25    28    05    15    18 |
               -Year|  2003  2006  2007  2008  2004  2006  2006  2005  2005  2005  2008  2004 |
                    |                                                                         |
    Extreme Min Temp|    33    37    41    41    49    54    57    58    56    51    37    36 |     33
                    |                                                                         |
    Date of Ext-Day |    14    01    01    10    01    03    28    27    21    30    30    27 |
               -Year|  2007  2002  2007  1999  1999  1999  2007  2003  2007  2004  2004  2003 |
                    |                                                                         |
Heating Degree Days |   256   220   184   131    41     6     0     0     0    23   117   264 |   1242
Cooling Degree Days |     6     3     8    16    42    95   214   228   178    86    21     1 |    898
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.1   0.1   0.4   0.7   0.8   0.7   0.5   0.4   1.6   1.7   0.7   0.0 |    7.7
    Max Temp >= 75  |   5.3   3.2   4.0   4.2   6.2  11.6  26.3  28.6  22.8  13.0   6.8   3.4 |  135.4
    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  |   0.0   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 <= 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  |  42.1  44.8  46.7  48.7  53.9  57.5  61.3  61.6  59.3  53.6  47.4  42.0 |   51.6
Avg Wet Bulb Temp   |  49.8  50.9  52.3  54.2  58.3  61.3  64.8  65.1  63.3  58.7  54.0  49.5 |   56.8
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
Avg Sea Level Pres  | 30.09 30.06 30.02 29.99 29.94 29.90 29.92 29.90 29.88 29.95 30.04 30.10 |  29.98
(Inches of Mercury) |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WEATHER             |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
See disclaimer below|                                                                         |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Thunderstorms   |   0.3   0.3   0.2   0.2   0.1   0.1   0.3   0.0   0.2   1.0   0.1   0.0 |    2.8
    Heavy Fog       |   2.1   2.0   1.6   0.5   0.9   0.0   0.1   0.4   1.5   2.2   3.1   2.9 |   17.3
    Fog             |  14.8  13.1  14.6  10.4  13.6  15.1  14.3  15.4  13.0  14.3  13.7  13.0 |  165.3
    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
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  1.74  2.78  1.03  0.64  0.16  0.02  0.10  0.00  0.09  0.86  0.77  1.20 |   9.42
                    |                                                                         |
Maximum Daily       |  2.05  2.11  2.19  0.77  0.57  0.10  0.31  0.03  0.38  2.68  1.17  1.50 |   2.68
                    |                                                                         |
    Date of Ext-Day |    09    12    15    28    22    02    15    02    21    20    30    15 |
               -Year|  2005  2001  2003  2005  2006  1999  1999  1999  2007  2004  2007  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   6.1   7.7   5.5   3.8   1.6   0.8   1.6   0.1   1.0   3.6   5.4   7.4 |   44.6
    >= 0.10         |   3.1   4.9   2.1   1.6   0.4   0.1   0.3   0.0   0.3   1.3   1.5   2.5 |   18.1
    >= 0.25         |   2.0   3.4   1.4   0.8   0.3   0.0   0.1   0.0   0.1   0.7   0.9   1.2 |   10.9
    >= 0.50         |   1.1   2.2   0.6   0.4   0.1   0.0   0.0   0.0   0.0   0.5   0.4   0.7 |    6.0
    >= 1.00         |   0.3   0.7   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.2   0.2   0.3 |    1.9
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.2   4.6   5.2   5.8   6.1   6.3   6.0   5.4   4.8   4.2   3.7   3.6 |    5.0
Daily Avg Max 2-Min |  14.0  14.4  14.7  14.9  14.7  14.4  14.3  13.6  13.3  13.0  12.7  12.7 |   13.9
Daily Avg Peak Gust |  17.8  18.2  18.6  18.9  18.4  18.0  17.8  16.9  16.5  16.3  16.1  16.4 |   17.5
                    |                                                                         |
Maximum Daily Avg   |  22.2  13.1  15.8  10.6  10.0   9.7   9.3   8.9   9.8  18.9  13.6  17.1 |   22.2
                    |                                                                         |
Maximum 2-Minute Avg|    40    29    35    28    26    30    28    20    25    33    35    39 |     40
                    |                                                                         |
Date of Max 2min-Day|    06    20    28    01    03    27    27    28    28    13    25    22 |
               -Year|  2003  2000  2003  2000  2001  2006  2002  2001  2005  2008  2002  1999 |
                    |                                                                         |
Maximum Peak Gust   |    49    40    45    35    36    35    40    23    35    47    45    48 |     49
                    |                                                                         |
Date of Max Gust-Day|    06    20    28    18    03    27    27    29    28    13    25    22 |
               -Year|  2003  2000  2003  2007  2001  2006  2002  2008  2005  2008  2002  1999 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   2.8   1.5   1.0   0.7   0.3   0.2   0.1   0.0   0.2   1.0   1.7   2.1 |   11.6
   Peak Gust >=40   |   0.6   0.1   0.2   0.0   0.0   0.0   0.1   0.0   0.0   0.2   0.4   0.2 |    1.8
   Peak Gust >=50   |   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
                    |                                                                         |
   Max 2-Minute >=30|   0.7   0.0   0.2   0.0   0.0   0.1   0.0   0.0   0.0   0.2   0.4   0.0 |    1.6
   Max 2-Minute >=40|   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.1
                    |                                                                         |
------------------------------------------------------------------------------------------------------

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.