STATION:  ST PAUL ISLAND AIRPORT (PASN), AK

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        |  28.6  29.3  29.9  34.0  40.1  46.7  51.0  52.3  49.6  42.8  37.3  32.0 |   39.5
Avg Min Temp        |  20.9  21.6  21.8  26.6  32.2  38.7  44.0  46.0  42.2  34.7  30.0  23.2 |   31.8
Avg Temperature     |  24.8  25.4  25.8  30.3  36.1  42.7  47.5  49.2  45.9  38.7  33.6  27.6 |   35.6
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    41    39    41    44    59    62    65    61    58    52    47    43 |     65
                    |                                                                         |
    Date of Ext-Day |    21    10    30    12    27    25    07    08    02    01    26    08 |
               -Year|  2003  2001  2003  1997  1997  2000  2008  1997  2004  2008  2007  2000 |
                    |                                                                         |
    Extreme Min Temp|    -8    -4    -4     1    18    25    30    32    28    14     4    -2 |     -8
                    |                                                                         |
    Date of Ext-Day |    11    01    20    01    08    06    07    16    17    30    26    20 |
               -Year|  2000  2006  2008  1997  2006  2006  2001  2008  2006  1999  2008  1999 |
                    |                                                                         |
Heating Degree Days |  1246  1118  1215  1041   895   669   541   491   572   814   941  1160 |  10703
Cooling Degree Days |     0     0     0     0     0     0     0     0     0     0     0     0 |      0
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   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 Temp >= 75  |   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 Temp <= 32  |  17.2  14.1  16.2  10.2   1.8   0.0   0.0   0.0   0.0   0.3   5.2  13.6 |   78.7
                    |                                                                         |
    Min Temp <= 32  |  27.1  25.7  28.9  25.2  15.8   2.1   0.2   0.2   0.6   9.7  18.8  24.8 |  179.0
    Min Temp <= 20  |  14.4  11.7  12.8   4.5   0.2   0.0   0.0   0.0   0.0   0.3   1.9  11.5 |   57.4
    Min Temp  <= 0  |   1.2   1.2   0.7   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2 |    3.3
                    |                                                                         |
Avg Dew Point Temp  |  20.4  22.0  21.2  25.4  32.0  39.5  44.6  46.4  42.6  33.0  28.7  22.9 |   31.6
Avg Wet Bulb Temp   |  23.5  24.8  24.5  28.1  34.3  41.0  45.7  47.5  44.5  36.1  32.0  26.4 |   34.0
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.37 30.49 30.32 30.21 30.09 30.00 30.00 30.03 30.05 30.18 30.28 30.31 |  30.19
(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   |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
    Heavy Fog       |   5.5   4.9   4.4   5.8   5.6   9.9   8.6   8.2   1.5   0.8   1.9   3.9 |   61.0
    Fog             |  22.7  23.4  21.9  21.8  24.4  25.6  22.8  21.8  20.1  21.5  23.1  23.0 |  272.0
    Hail            |   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.0   0.3   0.0 |    1.4
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  2.38  1.06  0.96  1.10  1.02  1.22  1.74  2.82  2.69  3.22  2.72  2.38 |  23.30
                    |                                                                         |
Maximum Daily       |  4.29  0.44  0.50  0.48  0.59  0.63  1.45  1.24  1.05  1.05  0.81  1.55 |   4.29
                    |                                                                         |
    Date of Ext-Day |    07    14    14    16    18    07    02    12    08    18    12    13 |
               -Year|  1997  2005  2005  2002  1997  2000  2001  2004  2000  2004  2000  1996 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  16.8  16.2  13.8  13.4  12.8  12.6  13.5  17.9  21.4  23.6  24.4  20.2 |  206.6
    >= 0.10         |   5.2   3.9   3.3   3.3   3.6   3.9   4.6   7.5   8.0   9.7   9.4   7.5 |   69.9
    >= 0.25         |   1.9   0.6   0.6   1.3   1.0   1.3   2.3   3.9   3.1   4.2   3.0   2.5 |   25.7
    >= 0.50         |   0.5   0.0   0.1   0.0   0.2   0.3   0.5   1.2   0.9   1.1   0.7   0.7 |    6.1
    >= 1.00         |   0.3   0.0   0.0   0.0   0.0   0.0   0.2   0.3   0.2   0.2   0.0   0.2 |    1.4
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|  18.6  17.8  16.0  16.0  13.6  11.9  10.8  11.7  14.7  16.4  17.7  17.6 |   15.2
Daily Avg Max 2-Min |  30.0  29.1  26.5  26.0  21.8  18.9  17.9  19.6  23.7  28.2  30.9  30.8 |   25.3
Daily Avg Peak Gust |  35.2  34.0  31.0  30.5  25.7  22.3  21.3  23.6  28.5  34.1  36.9  36.4 |   30.0
                    |                                                                         |
Maximum Daily Avg   |  39.8  39.3  37.8  33.9  34.6  27.9  26.2  30.9  33.3  35.7  40.0  42.6 |   42.6
                    |                                                                         |
Maximum 2-Minute Avg|    63    67    48    56    45    40    37    52    48    59    60    59 |     67
                    |                                                                         |
Date of Max 2min-Day|    31    01    17    06    15    05    17    29    22    17    04    23 |
               -Year|  2000  2000  1999  2001  1997  2008  2003  2000  2005  2005  1996  2001 |
                    |                                                                         |
Maximum Peak Gust   |    75    79    58    68    54    53    46    61    58    71    71    69 |     79
                    |                                                                         |
Date of Max Gust-Day|    13    01    08    06    15    05    17    29    22    17    04    01 |
               -Year|  2008  2000  2004  2001  1997  2008  2003  2000  2005  2005  1996  1996 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |  21.3  18.1  17.0  15.4   8.9   3.9   3.3   6.4  13.2  20.6  22.0  21.7 |  171.8
   Peak Gust >=40   |  10.2   8.2   5.6   5.2   1.9   0.3   0.2   1.4   3.8   8.3  11.1  11.0 |   67.3
   Peak Gust >=50   |   3.3   2.3   0.5   1.2   0.4   0.1   0.0   0.2   0.6   2.3   3.9   4.9 |   19.5
                    |                                                                         |
   Max 2-Minute >=30|  14.8  13.2  10.4   9.3   4.1   0.8   0.7   2.5   6.8  12.5  15.9   0.0 |   90.9
   Max 2-Minute >=40|   5.0   4.1   1.4   1.9   0.8   0.1   0.0   0.3   0.9   2.9   5.5   0.0 |   22.8
                    |                                                                         |
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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.