STATION:  SITKA ROCKY GUTIERREZ ARPT (PASI), 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        |  40.1  41.6  41.6  47.4  52.3  57.5  60.0  61.9  57.1  50.7  44.3  41.9 |   49.7
Avg Min Temp        |  31.9  32.8  32.0  36.2  42.2  48.2  52.0  52.6  48.2  41.7  35.6  33.2 |   40.5
Avg Temperature     |  36.0  37.2  36.8  41.8  47.3  52.8  56.0  57.2  52.6  46.2  40.0  37.6 |   45.1
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    54    58    61    70    73    81    79    89    74    61    62    56 |     89
                    |                                                                         |
    Date of Ext-Day |    15    10    22    24    20    19    16    15    29    02    26    22 |
               -Year|  2002  2006  1998  2003  2002  2004  1996  2004  2003  2008  2002  2002 |
                    |                                                                         |
    Extreme Min Temp|    11    11     5    15    29    38    43    42    33    11    13     6 |      5
                    |                                                                         |
    Date of Ext-Day |    26    28    15    07    06    01    03    27    30    06    24    14 |
               -Year|  2004  2007  2006  2006  2002  1999  1996  1999  1996  2007  2006  2004 |
                    |                                                                         |
Heating Degree Days |   899   785   875   695   550   366   278   243   371   583   751   851 |   7245
Cooling Degree Days |     0     0     0     0     0     1     0     2     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   0.0   0.4   0.2   0.5   0.0   0.0   0.0   0.0 |    1.2
    Max Temp <= 32  |   4.3   0.9   1.9   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.2   2.0 |   10.4
                    |                                                                         |
    Min Temp <= 32  |  14.1  12.8  14.4   5.8   0.5   0.0   0.0   0.0   0.0   1.5   8.5  12.3 |   70.0
    Min Temp <= 20  |   3.5   0.9   1.7   0.3   0.0   0.0   0.0   0.0   0.0   0.1   1.1   1.7 |    9.2
    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  |  30.3  31.0  28.8  34.1  40.4  47.1  51.7  52.4  47.8  40.5  34.3  31.4 |   39.1
Avg Wet Bulb Temp   |  34.1  34.7  34.1  38.7  44.1  49.8  53.6  54.5  50.1  43.7  38.1  35.4 |   42.6
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.28 30.19 30.16 30.07 30.05 30.03 30.02 30.02 30.08 30.11 30.14 30.22 |  30.11
(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   |   0.3   0.1   0.1   0.2   0.1   0.1   0.0   0.2   0.4   1.0   0.4   0.7 |    3.5
    Heavy Fog       |   1.3   1.3   1.6   0.8   0.4   0.3   0.5   0.5   0.5   0.5   0.8   1.3 |    9.8
    Fog             |  19.0  15.6  16.2  13.5  13.5  14.5  17.1  15.9  17.2  18.3  14.5  18.7 |  194.1
    Hail            |   0.5   0.3   0.9   0.6   0.0   0.0   0.0   0.0   0.1   0.7   0.8   0.9 |    4.8
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  7.61  5.35  5.31  4.36  3.89  2.36  4.55  6.76 12.26 13.37  8.85  9.48 |  84.15
                    |                                                                         |
Maximum Daily       |  2.49  1.87  2.16  1.60  1.79  0.78  2.22  3.33  3.74  3.36  4.74  3.15 |   4.74
                    |                                                                         |
    Date of Ext-Day |    27    11    10    01    11    14    18    31    20    19    22    27 |
               -Year|  2000  2002  2001  1997  1997  2005  2008  2006  2004  1998  2005  1999 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  21.1  18.6  18.9  16.7  16.9  16.3  21.5  20.4  24.6  24.7  20.3  22.2 |  242.2
    >= 0.10         |  15.1  11.7  13.1  10.8  10.2   7.8  12.1  13.0  18.7  20.5  15.2  17.3 |  165.6
    >= 0.25         |  10.6   7.5   7.7   6.1   4.8   3.1   5.9   8.3  14.0  16.2  11.4  11.9 |  107.5
    >= 0.50         |   5.5   2.7   3.2   3.0   2.4   0.8   2.5   4.8   9.1  10.3   6.2   6.1 |   56.5
    >= 1.00         |   1.5   0.8   0.7   0.4   0.5   0.0   0.4   1.6   3.3   3.4   1.8   2.2 |   16.7
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   8.9   8.2   8.6   7.5   7.1   6.1   5.6   5.6   6.9   8.7   9.0   9.9 |    7.7
Daily Avg Max 2-Min |  20.7  19.2  20.3  18.1  16.9  15.1  14.4  14.7  17.5  20.8  20.9  22.8 |   18.5
Daily Avg Peak Gust |  25.9  23.9  25.5  22.2  20.4  18.0  17.2  17.9  21.7  26.4  26.4  29.2 |   22.9
                    |                                                                         |
Maximum Daily Avg   |  25.4  23.0  23.4  22.2  18.4  15.6  15.9  20.4  20.3  23.2  22.7  25.6 |   25.6
                    |                                                                         |
Maximum 2-Minute Avg|    49    44    48    36    33    26    30    41    40    47    48    52 |     52
                    |                                                                         |
Date of Max 2min-Day|    03    10    28    01    06    21    11    28    22    22    01    16 |
               -Year|  2001  2002  2004  2005  2001  2008  1999  1998  1997  2008  1999  2004 |
                    |                                                                         |
Maximum Peak Gust   |    69    61    70    53    40    36    38    53    52    70    70    77 |     77
                    |                                                                         |
Date of Max Gust-Day|    03    05    28    28    06    04    20    28    22    31    01    16 |
               -Year|  2001  2004  2004  2006  2001  2004  2006  1998  1997  1999  1999  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |  10.8   7.3   9.1   5.3   3.2   0.9   0.7   2.2   5.5  11.6  10.9  15.5 |   83.2
   Peak Gust >=40   |   3.9   2.1   2.3   0.8   0.3   0.0   0.0   0.3   1.4   4.0   3.4   6.1 |   24.6
   Peak Gust >=50   |   1.0   0.7   0.3   0.1   0.0   0.0   0.0   0.1   0.1   1.4   0.9   1.3 |    5.9
                    |                                                                         |
   Max 2-Minute >=30|   5.2   2.4   2.8   1.4   0.3   0.0   0.1   0.4   1.9   4.5   4.3   0.0 |   23.4
   Max 2-Minute >=40|   0.6   0.3   0.2   0.0   0.0   0.0   0.0   0.1   0.1   0.9   0.5   0.0 |    2.7
                    |                                                                         |
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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.