STATION:  JUNEAU INTERNATIONAL AIRPORT (PAJN), 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        |  32.7  36.0  38.6  48.0  56.7  62.7  63.4  62.4  54.8  47.2  38.3  35.1 |   48.0
Avg Min Temp        |  23.8  25.8  26.6  32.1  39.9  46.6  49.9  48.6  44.3  37.5  29.0  26.5 |   35.9
Avg Temperature     |  28.3  30.9  32.6  40.1  48.3  54.6  56.6  55.5  49.5  42.4  33.7  30.8 |   41.9
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    52    53    61    74    75    85    83    84    73    61    62    54 |     85
                    |                                                                         |
    Date of Ext-Day |    07    23    21    26    21    19    15    10    03    03    24    23 |
               -Year|  2001  2004  1998  2003  1997  2004  2004  2004  1996  2003  2004  1999 |
                    |                                                                         |
    Extreme Min Temp|    -5    -8    -3    13    26    33    39    37    28    20    -5    -2 |     -8
                    |                                                                         |
    Date of Ext-Day |    12    08    17    03    03    09    21    28    30    30    27    31 |
               -Year|  2005  2008  2006  2007  2002  2008  2008  2007  1996  2003  2006  1996 |
                    |                                                                         |
Heating Degree Days |  1138   963  1004   748   519   313   261   295   464   702   940  1060 |   8406
Cooling Degree Days |     0     0     0     0     0     2     1     1     0     0     0     0 |      3
                    |                                                                         |
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   0.2   2.3   2.3   2.8   0.0   0.0   0.0   0.0 |    7.6
    Max Temp <= 32  |  12.3   6.3   4.9   0.0   0.0   0.0   0.0   0.0   0.0   0.0   5.1  10.0 |   38.7
                    |                                                                         |
    Min Temp <= 32  |  23.2  20.7  21.3  14.6   2.6   0.0   0.0   0.0   1.2   7.5  17.2  21.3 |  129.5
    Min Temp <= 20  |  10.4   6.6   6.5   1.5   0.0   0.0   0.0   0.0   0.0   0.4   5.4   7.2 |   38.1
    Min Temp  <= 0  |   0.7   0.3   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.3   0.4 |    2.1
                    |                                                                         |
Avg Dew Point Temp  |  25.4  26.3  25.7  32.2  39.4  47.1  51.3  50.6  46.2  39.3  31.2  27.4 |   36.8
Avg Wet Bulb Temp   |  28.2  28.9  30.6  37.1  44.2  50.7  53.5  52.8  47.9  41.0  33.3  29.9 |   39.8
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.20 30.14 30.12 30.04 30.04 30.02 30.01 29.99 30.06 30.10 30.09 30.23 |  30.09
(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   |   0.1   0.0   0.0   0.0   0.0   0.2   0.2   0.2   0.0   0.0   0.0   0.2 |    0.8
    Heavy Fog       |   3.1   3.5   2.3   1.4   0.9   0.8   0.5   1.2   3.1   4.3   3.5   3.8 |   28.3
    Fog             |  18.8  16.9  16.9  16.4  12.6  11.9  14.2  16.9  20.1  22.8  19.0  18.2 |  204.6
    Hail            |   0.5   0.2   0.6   0.5   0.3   0.0   0.0   0.0   0.0   0.0   0.2   0.4 |    2.6
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  5.05  3.98  3.75  3.45  3.29  3.08  5.58  6.19  9.63 10.05  5.88  6.84 |  66.78
                    |                                                                         |
Maximum Daily       |  2.06  1.48  1.18  1.49  1.29  1.61  2.39  1.60  3.35  3.47  3.45  2.67 |   3.47
                    |                                                                         |
    Date of Ext-Day |    27    13    29    15    16    28    22    31    25    20    21    27 |
               -Year|  2000  2001  1998  1999  2008  2000  2001  1998  1996  1998  2005  1999 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  20.3  17.9  19.0  17.6  16.7  16.0  20.2  20.7  24.5  24.7  20.0  20.8 |  238.4
    >= 0.10         |  12.3  10.5  11.3   9.5   9.4   7.6  12.4  13.5  18.6  19.5  13.2  13.5 |  151.3
    >= 0.25         |   7.2   5.9   5.1   4.7   4.5   4.5   6.7   9.1  13.2  12.4   7.2   9.2 |   89.7
    >= 0.50         |   3.2   2.2   1.8   1.6   1.7   1.8   3.5   4.2   7.0   6.8   3.4   4.4 |   41.7
    >= 1.00         |   0.7   0.4   0.1   0.4   0.3   0.2   0.9   1.2   1.9   2.1   1.0   1.3 |   10.4
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   7.1   6.4   7.7   7.7   7.5   6.1   6.2   6.3   7.7   8.1   6.9   7.4 |    7.1
Daily Avg Max 2-Min |  17.5  16.5  19.0  18.5  17.5  14.9  14.7  15.4  17.8  19.4  17.7  18.7 |   17.3
Daily Avg Peak Gust |  21.4  20.2  23.4  22.6  21.2  18.2  17.8  18.8  22.3  24.3  22.2  23.2 |   21.3
                    |                                                                         |
Maximum Daily Avg   |  25.4  24.7  26.5  22.2  22.3  14.7  16.7  21.8  24.2  28.2  27.3  25.1 |   28.2
                    |                                                                         |
Maximum 2-Minute Avg|    45    46    40    37    36    26    30    38    41    47    47    48 |     48
                    |                                                                         |
Date of Max 2min-Day|    03    10    28    01    06    21    20    28    07    29    03    10 |
               -Year|  2001  2002  2004  1999  1999  2006  2003  1999  2001  2004  2001  1998 |
                    |                                                                         |
Maximum Peak Gust   |    56    54    49    49    47    33    39    48    53    61    61    68 |     68
                    |                                                                         |
Date of Max Gust-Day|    03    10    25    02    06    21    19    28    14    21    03    10 |
               -Year|  2001  2002  2000  2005  1999  2006  2008  1999  2000  2007  2001  1998 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   6.9   5.6   8.5   6.5   3.7   0.7   1.4   3.0   6.3   9.6   7.6   8.8 |   68.7
   Peak Gust >=40   |   2.6   1.6   1.8   1.1   0.6   0.0   0.0   0.5   1.8   3.3   1.7   2.9 |   17.9
   Peak Gust >=50   |   0.8   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.2   1.0   0.5   0.7 |    3.5
                    |                                                                         |
   Max 2-Minute >=30|   3.2   2.3   3.4   1.9   1.0   0.0   0.1   0.9   2.6   4.9   2.9   0.0 |   23.1
   Max 2-Minute >=40|   0.8   0.3   0.1   0.0   0.0   0.0   0.0   0.0   0.2   0.9   0.6   0.0 |    2.8
                    |                                                                         |
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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.