STATION:  HONOLULU INTERNATIONAL AIRPORT (PHNL), HI

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 1996 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        |  80.0  80.4  81.2  82.7  84.5  86.8  87.8  88.7  87.9  86.4  83.4  81.1 |   84.2
Avg Min Temp        |  67.0  67.2  68.6  70.1  71.6  74.0  75.0  75.5  74.5  73.7  71.3  68.7 |   71.4
Avg Temperature     |  73.5  73.8  74.9  76.4  78.1  80.4  81.4  82.1  81.2  80.1  77.4  74.9 |   77.8
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    87    87    88    88    90    90    92    96    93    92    89    87 |     96
                    |                                                                         |
    Date of Ext-Day |    15    19    20    18    05    05    29    04    02    08    01    27 |
               -Year|  1998  2004  1998  2005  2005  1997  1997  2003  2005  2004  1996  2006 |
                    |                                                                         |
    Extreme Min Temp|    53    56    58    62    60    67    70    69    68    66    64    56 |     53
                    |                                                                         |
    Date of Ext-Day |    31    06    16    01    02    13    14    13    27    18    21    28 |
               -Year|  1998  1998  2005  2002  2006  1999  1997  1997  1996  1999  1997  1996 |
                    |                                                                         |
Heating Degree Days |     0     0     0     0     0     0     0     0     0     0     0     0 |      0
Cooling Degree Days |   263   249   307   343   405   462   509   530   486   467   371   307 |   4699
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.6   0.8   5.1   9.4   4.4   1.9   0.0   0.0 |   22.1
    Max Temp >= 75  |  30.7  27.9  30.8  29.9  31.0  30.0  31.0  31.0  30.0  31.0  29.9  30.9 |  364.2
    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  |   0.0   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  |  64.0  62.3  63.7  63.4  65.0  65.7  66.9  67.2  68.0  67.6  66.9  64.9 |   65.5
Avg Wet Bulb Temp   |  67.5  66.5  67.6  67.9  69.5  70.5  71.5  71.9  72.2  71.4  70.4  68.5 |   69.6
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.01 30.05 30.04 30.08 30.04 30.03 30.03 30.01 29.99 29.99 30.00 30.02 |  30.02
(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   0.6   0.8   0.2   0.0   0.1   0.1   0.2   0.1   0.6   0.5   0.8 |    4.6
    Heavy Fog       |   0.1   0.2   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.0   0.0 |    0.3
    Fog             |   6.1   4.3   6.2   4.3   2.8   2.8   3.2   2.5   3.7   4.4   5.0   3.8 |   49.0
    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     |  2.71  1.54  2.57  0.46  0.71  0.30  0.35  0.50  0.50  1.19  3.71  2.27 |  16.81
                    |                                                                         |
Maximum Daily       |  3.76  5.43  2.94  0.46  1.03  0.99  0.42  1.71  0.33  1.86  4.51  3.35 |   5.43
                    |                                                                         |
    Date of Ext-Day |    02    27    30    04    15    05    20    31    06    19    05    11 |
               -Year|  2004  2004  2006  2003  2004  2001  2008  1996  2004  1999  1996  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.3   6.7   9.2   7.2   5.3   6.1   7.2   5.5   7.1   7.6   9.3   9.8 |   90.2
    >= 0.10         |   4.1   2.2   3.2   1.6   1.4   0.5   0.8   1.2   2.2   2.5   3.6   3.8 |   26.9
    >= 0.25         |   2.6   1.3   2.2   0.3   0.9   0.2   0.3   0.4   0.3   1.5   2.3   2.3 |   14.7
    >= 0.50         |   1.3   0.6   1.8   0.0   0.5   0.1   0.0   0.2   0.0   0.8   1.7   1.1 |    8.0
    >= 1.00         |   0.7   0.2   0.7   0.0   0.1   0.0   0.0   0.1   0.0   0.2   1.1   0.5 |    3.4
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   9.3   9.3   9.7  11.7  10.6  11.8  12.2  12.2  10.7  10.2   9.3   9.6 |   10.6
Daily Avg Max 2-Min |  18.1  18.5  19.1  21.5  19.3  21.0  21.2  21.0  20.2  19.0  18.1  18.7 |   19.6
Daily Avg Peak Gust |  22.4  23.1  23.8  26.4  24.0  26.3  26.8  26.4  25.1  23.7  22.7  23.2 |   24.5
                    |                                                                         |
Maximum Daily Avg   |  21.1  21.7  19.6  22.3  17.6  16.7  19.4  18.4  17.1  17.6  19.8  22.3 |   22.3
                    |                                                                         |
Maximum 2-Minute Avg|    40    37    32    35    29    30    30    31    30    31    31    39 |     40
                    |                                                                         |
Date of Max 2min-Day|    22    27    30    03    19    25    22    31    01    01    30    05 |
               -Year|  2004  2004  1998  2000  1998  1999  1998  2001  2003  2007  1998  2007 |
                    |                                                                         |
Maximum Peak Gust   |    47    47    41    44    37    37    38    37    37    37    38    48 |     48
                    |                                                                         |
Date of Max Gust-Day|    14    27    09    03    21    25    13    31    14    29    30    05 |
               -Year|  2004  2004  2007  2000  1998  1999  2005  2001  2002  2001  1998  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   4.8   5.1   6.7   8.5   4.2   6.2   8.1   8.7   5.1   5.3   4.9   6.8 |   74.4
   Peak Gust >=40   |   0.6   0.2   0.1   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.5 |    1.5
   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|   1.3   0.4   0.4   0.6   0.0   0.1   0.2   0.2   0.1   0.1   0.2   0.0 |    3.4
   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
                    |                                                                         |
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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.