STATION:  ANCHORAGE-LAKE HOOD SEAPLANE BASE (PALH), AK

CLIMATOLOGICAL SUMMARY.  Period of Record: Feb 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        |  23.0  28.3  33.8  45.9  57.8  65.5  68.0  65.8  56.9  42.5  29.6  25.0 |   45.2
Avg Min Temp        |  11.2  15.2  19.0  29.8  41.6  49.8  54.1  51.9  43.8  32.2  19.1  13.5 |   31.8
Avg Temperature     |  17.1  21.7  26.4  37.8  49.7  57.7  61.1  58.8  50.3  37.3  24.4  19.2 |   38.5
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    48    51    50    72    80    83    85    85    69    68    56    49 |     85
                    |                                                                         |
    Date of Ext-Day |    07    06    20    29    27    26    08    16    21    09    26    26 |
               -Year|  2001  2006  1998  2005  2006  2004  2003  2004  2000  2006  2002  1999 |
                    |                                                                         |
    Extreme Min Temp|   -18   -25    -7     0    25    38    45    37    28     7    -9   -17 |    -25
                    |                                                                         |
    Date of Ext-Day |    17    04    10    01    03    03    01    28    24    27    27    16 |
               -Year|  2004  1999  1999  2004  2001  1999  2008  1998  2004  2001  2003  2001 |
                    |                                                                         |
Heating Degree Days |  1484  1222  1197   815   475   223   133   195   440   857  1219  1419 |   9679
Cooling Degree Days |     0     0     0     0     0     2    11     4     0     0     0     0 |     18
                    |                                                                         |
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   0.8   2.3   3.9   3.0   0.0   0.0   0.0   0.0 |   10.0
    Max Temp <= 32  |  24.4  18.1  12.5   1.1   0.1   0.0   0.0   0.0   0.0   3.6  19.0  23.7 |  102.4
                    |                                                                         |
    Min Temp <= 32  |  30.6  26.6  29.3  19.0   1.5   0.0   0.0   0.0   1.6  14.9  26.6  30.3 |  180.3
    Min Temp <= 20  |  22.3  17.3  15.2   3.0   0.0   0.0   0.0   0.0   0.0   2.2  15.5  22.5 |   98.1
    Min Temp  <= 0  |   7.0   4.3   1.1   0.1   0.0   0.0   0.0   0.0   0.0   0.0   1.7   4.2 |   18.4
                    |                                                                         |
Avg Dew Point Temp  |  11.4  15.4  15.9  25.5  34.5  44.2  49.9  49.7  41.6  29.8  18.4  14.0 |   29.2
Avg Wet Bulb Temp   |  16.1  20.3  23.5  33.1  42.8  50.6  54.7  53.7  46.1  34.3  22.8  18.2 |   34.7
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.22 30.19 30.20 30.09 30.01 29.97 29.94 29.98 30.03 30.11 30.07 30.28 |  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   |   0.0   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       |   4.0   4.2   2.3   0.5   0.1   0.0   0.1   0.4   0.5   1.5   3.3   3.1 |   19.8
    Fog             |  13.8  11.5   9.7   5.2   3.7   5.3   7.0  11.3   8.2  11.1  11.8  14.2 |  112.8
    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     |  0.66  0.61  0.53  0.50  0.55  1.09  1.86  2.63  3.48  1.73  0.88  0.98 |  15.50
                    |                                                                         |
Maximum Daily       |  0.50  0.56  0.39  1.34  0.46  0.87  1.06  1.86  1.24  1.38  0.88  0.54 |   1.86
                    |                                                                         |
    Date of Ext-Day |    03    14    13    25    26    24    04    18    30    01    10    20 |
               -Year|  2005  2005  2005  2008  1999  2007  2001  2006  2004  2002  2004  1999 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   6.9   5.6   5.2   5.2   7.1   9.1  13.1  15.8  15.8  13.5   7.4   7.9 |  112.7
    >= 0.10         |   2.3   2.0   1.8   1.3   1.8   3.1   5.7   7.5   9.2   5.2   2.8   3.2 |   45.9
    >= 0.25         |   0.6   1.0   0.5   0.5   0.5   1.5   2.2   3.5   4.5   2.4   1.1   1.5 |   19.7
    >= 0.50         |   0.1   0.1   0.0   0.1   0.0   0.5   0.8   1.0   1.8   0.5   0.2   0.1 |    5.2
    >= 1.00         |   0.0   0.0   0.0   0.1   0.0   0.0   0.1   0.3   0.5   0.2   0.0   0.0 |    1.2
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.9   4.4   5.8   5.4   6.3   6.0   5.4   4.6   5.0   5.1   4.8   4.6 |    5.2
Daily Avg Max 2-Min |  13.7  12.8  14.9  14.4  15.7  14.8  14.0  12.8  13.7  13.5  13.3  13.4 |   13.9
Daily Avg Peak Gust |  16.9  15.8  18.6  18.6  20.6  19.7  18.5  16.7  17.8  17.0  16.5  16.6 |   17.8
                    |                                                                         |
Maximum Daily Avg   |  20.0  16.6  28.4  17.4  18.5  14.9  15.6  16.8  17.4  14.1  20.8  18.1 |   28.4
                    |                                                                         |
Maximum 2-Minute Avg|    33    37    53    33    29    29    25    29    31    31    32    38 |     53
                    |                                                                         |
Date of Max 2min-Day|    06    02    12    02    27    05    19    16    22    17    14    08 |
               -Year|  2004  2000  2003  2001  2006  2007  2001  1998  1999  2005  2006  2008 |
                    |                                                                         |
Maximum Peak Gust   |    46    52    67    44    37    40    36    38    45    49    43    48 |     67
                    |                                                                         |
Date of Max Gust-Day|    09    02    13    02    14    05    02    23    21    10    26    08 |
               -Year|  2002  2000  2003  2001  2004  2007  2003  2005  2000  2008  2002  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   3.3   1.9   3.3   2.2   3.0   2.1   1.4   0.9   1.8   1.9   2.1   2.5 |   26.4
   Peak Gust >=40   |   0.4   0.4   0.8   0.1   0.0   0.1   0.0   0.0   0.1   0.2   0.3   0.5 |    2.8
   Peak Gust >=50   |   0.0   0.1   0.4   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.5
                    |                                                                         |
   Max 2-Minute >=30|   0.3   0.3   1.4   0.1   0.0   0.0   0.0   0.0   0.3   0.2   0.4   0.0 |    2.9
   Max 2-Minute >=40|   0.0   0.0   0.4   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.4
                    |                                                                         |
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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.