STATION:  FULLERTON MUNICIPAL ARPT (KFUL), 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        |  68.2  68.0  70.1  71.7  75.7  79.1  84.3  85.6  83.5  78.9  73.1  67.8 |   75.5
Avg Min Temp        |  45.5  47.1  50.1  52.3  57.9  61.8  65.2  65.3  62.6  57.2  50.3  44.5 |   55.0
Avg Temperature     |  56.9  57.6  60.1  62.0  66.8  70.4  74.7  75.4  73.0  68.0  61.7  56.2 |   65.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    94    92    97   102   104   102   106   104   108   100    96    86 |    108
                    |                                                                         |
    Date of Ext-Day |    31    22    11    27    02    21    22    31    03    07    06    16 |
               -Year|  2003  2002  2007  2004  2004  2008  2006  2007  2007  2008  2006  1998 |
                    |                                                                         |
    Extreme Min Temp|    28    35    36    39    46    52    58    57    55    46    36    31 |     28
                    |                                                                         |
    Date of Ext-Day |    14    02    12    10    01    05    24    24    28    12    30    24 |
               -Year|  2007  2002  2006  1999  1999  1999  1999  2002  1998  2008  2004  1998 |
                    |                                                                         |
Heating Degree Days |   259   213   167   119    25     3     0     0     0    20   120   274 |   1201
Cooling Degree Days |     6     4    16    28    82   166   302   324   240   114    21     0 |   1303
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.1   0.4   0.9   1.2   1.7   2.2   5.1   7.6   6.3   4.5   1.2   0.0 |   31.2
    Max Temp >= 75  |   6.7   5.2   7.2   8.0  14.7  23.9  30.6  30.7  27.7  19.8  10.6   6.1 |  191.2
    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  |   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2 |    0.5
    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  |  40.7  43.0  45.9  47.2  52.9  57.4  60.8  60.7  58.4  51.9  45.6  39.8 |   50.3
Avg Wet Bulb Temp   |  48.9  50.2  52.4  53.8  58.4  62.0  65.4  65.3  63.5  58.5  53.1  48.2 |   56.6
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.09 30.05 30.01 29.99 29.93 29.89 29.90 29.89 29.87 29.94 30.03 30.09 |  29.97
(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   |   0.8   1.2   1.2   1.0   0.3   0.1   0.3   0.3   0.2   1.0   0.3   0.9 |    7.5
    Heavy Fog       |   1.8   1.1   1.0   0.5   0.3   0.0   0.2   0.5   0.9   1.7   1.9   1.9 |   11.8
    Fog             |  16.5  13.5  15.4   9.5  12.2  12.4  11.4  12.9  12.8  15.7  15.1  14.4 |  161.8
    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     |  2.02  3.28  1.09  0.90  0.21  0.05  0.02  0.00  0.16  0.69  0.75  1.11 |  10.29
                    |                                                                         |
Maximum Daily       |  2.31  2.50  2.05  1.17  0.76  0.25  0.08  0.04  0.49  1.94  1.16  1.59 |   2.50
                    |                                                                         |
    Date of Ext-Day |    09    21    15    04    22    02    23    25    22    20    30    15 |
               -Year|  2005  2005  2003  2006  2006  1999  2006  2003  2007  2004  2007  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   5.7   7.7   5.2   3.7   1.3   0.5   0.5   0.1   1.3   3.1   5.5   6.3 |   40.9
    >= 0.10         |   3.5   5.6   2.1   1.8   0.5   0.2   0.0   0.0   0.4   1.0   1.3   2.5 |   18.9
    >= 0.25         |   2.7   3.9   1.4   1.0   0.3   0.1   0.0   0.0   0.3   0.7   0.9   1.3 |   12.6
    >= 0.50         |   1.3   2.4   0.5   0.6   0.1   0.0   0.0   0.0   0.0   0.4   0.5   0.7 |    6.6
    >= 1.00         |   0.5   0.8   0.3   0.3   0.0   0.0   0.0   0.0   0.0   0.3   0.2   0.2 |    2.5
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   3.5   4.1   4.2   4.7   4.5   4.6   4.2   3.8   3.6   3.2   2.9   3.0 |    3.9
Daily Avg Max 2-Min |  12.0  13.3  13.2  13.6  13.0  12.2  12.0  11.5  11.4  11.4  11.0  11.4 |   12.2
Daily Avg Peak Gust |  15.5  17.1  16.9  17.8  16.7  15.7  15.6  15.0  15.0  14.9  14.5  14.7 |   15.8
                    |                                                                         |
Maximum Daily Avg   |  16.6  14.8  14.7  10.4   9.2   7.3   6.7   6.3   7.7   9.2  10.1  16.1 |   16.6
                    |                                                                         |
Maximum 2-Minute Avg|    33    36    28    23    28    17    20    22    22    26    26    32 |     36
                    |                                                                         |
Date of Max 2min-Day|    02    11    28    01    03    03    29    31    02    05    15    21 |
               -Year|  2006  1999  2003  2005  2001  1999  2003  1998  1998  2005  2008  1999 |
                    |                                                                         |
Maximum Peak Gust   |    44    43    37    38    33    22    25    28    28    37    39    43 |     44
                    |                                                                         |
Date of Max Gust-Day|    07    11    27    18    03    03    17    31    02    21    28    21 |
               -Year|  2003  1999  2007  2007  2001  1999  2006  1998  1998  2007  2007  1999 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   1.4   1.0   1.0   0.5   0.2   0.0   0.0   0.0   0.0   0.6   0.9   1.3 |    7.0
   Peak Gust >=40   |   0.3   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    0.5
   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|   0.4   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.7
   Max 2-Minute >=40|   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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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.