STATION:  ANCHORAGE-MERRILL FIELD AIRPORT (PAMR), AK

CLIMATOLOGICAL SUMMARY.  Period of Record: Nov 1997 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        |  22.2  28.4  34.2  46.4  57.5  65.0  67.6  65.4  56.3  42.0  29.1  24.5 |   44.9
Avg Min Temp        |   8.0  12.4  17.4  29.6  40.8  49.5  53.7  51.0  42.5  30.3  16.7  10.6 |   30.2
Avg Temperature     |  15.1  20.4  25.8  38.0  49.2  57.2  60.7  58.2  49.4  36.2  22.9  17.5 |   37.5
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    50    49    49    71    78    81    85    83    69    67    55    55 |     85
                    |                                                                         |
    Date of Ext-Day |    07    02    20    29    21    26    14    09    21    09    26    04 |
               -Year|  2001  2007  1998  2005  2002  2004  2003  2003  2000  2006  2002  2001 |
                    |                                                                         |
    Extreme Min Temp|   -22   -26   -10    -1    28    38    42    35    26     4   -15   -17 |    -26
                    |                                                                         |
    Date of Ext-Day |    17    04    09    01    03    05    01    28    29    26    26    16 |
               -Year|  2004  1999  1999  2004  2001  2006  2008  1998  2000  2001  2006  2001 |
                    |                                                                         |
Heating Degree Days |  1548  1260  1216   810   491   235   143   213   467   894  1264  1472 |  10013
Cooling Degree Days |     0     0     0     0     0     2     8     3     0     0     0     0 |     14
                    |                                                                         |
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   0.7   2.0   3.2   2.7   0.0   0.0   0.0   0.0 |    8.7
    Max Temp <= 32  |  24.5  17.6  11.1   0.9   0.0   0.0   0.0   0.0   0.0   4.2  19.5  24.0 |  101.9
                    |                                                                         |
    Min Temp <= 32  |  30.5  27.4  29.2  19.3   1.4   0.0   0.0   0.0   2.6  17.9  27.7  30.7 |  186.8
    Min Temp <= 20  |  25.3  20.0  16.4   3.2   0.0   0.0   0.0   0.0   0.0   3.2  17.5  24.0 |  109.6
    Min Temp  <= 0  |   8.7   4.9   3.8   0.1   0.0   0.0   0.0   0.0   0.0   0.0   3.9   6.9 |   28.4
                    |                                                                         |
Avg Dew Point Temp  |  11.1  15.4  16.4  25.9  34.9  45.1  50.6  49.8  41.8  29.7  18.5  13.8 |   29.4
Avg Wet Bulb Temp   |  14.8  19.6  23.5  33.5  42.9  51.0  55.0  53.6  45.9  33.7  22.0  17.2 |   34.4
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.21 30.19 30.20 30.08 30.01 29.97 29.94 29.98 30.04 30.11 30.10 30.32 |  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   0.3   0.2   0.5   0.1   0.0   0.0   0.0 |    1.1
    Heavy Fog       |   4.3   2.8   1.5   0.3   0.2   0.0   0.0   0.1   0.5   2.5   4.1   3.6 |   19.8
    Fog             |  17.0  10.9   8.2   4.6   3.0   3.8   7.1   9.8   9.6  11.7  14.5  16.1 |  116.3
    Hail            |   0.5   0.0   0.2   0.1   0.1   0.2   0.1   0.0   0.0   0.1   0.2   0.3 |    1.8
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.65  0.72  0.65  0.44  0.53  1.03  1.69  2.69  3.28  1.45  0.64  1.02 |  14.78
                    |                                                                         |
Maximum Daily       |  0.62  0.90  0.56  1.28  0.48  0.80  0.97  1.21  1.42  1.76  0.70  1.78 |   1.78
                    |                                                                         |
    Date of Ext-Day |    03    02    18    25    03    16    15    12    06    01    08    10 |
               -Year|  2005  2000  2002  2008  1998  2004  2006  1999  2005  2002  2004  2003 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   6.1   6.6   6.8   5.5   7.8  10.1  12.9  14.9  16.1  12.4   6.1   6.4 |  111.6
    >= 0.10         |   2.3   1.9   2.4   1.3   1.8   2.8   5.4   7.8   8.3   3.9   1.9   3.4 |   43.0
    >= 0.25         |   0.6   0.8   0.8   0.2   0.5   1.3   2.2   3.6   4.6   1.8   0.6   1.2 |   18.3
    >= 0.50         |   0.2   0.2   0.1   0.1   0.0   0.3   0.5   1.2   1.9   0.3   0.2   0.3 |    5.1
    >= 1.00         |   0.0   0.0   0.0   0.1   0.0   0.0   0.0   0.2   0.2   0.2   0.0   0.1 |    0.7
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   3.2   3.1   4.4   4.6   5.3   5.1   4.7   3.9   3.7   3.6   3.2   3.0 |    4.0
Daily Avg Max 2-Min |  10.6  10.6  12.3  12.8  14.2  13.2  12.2  11.3  11.6  11.4  10.5  10.5 |   11.8
Daily Avg Peak Gust |  13.4  13.3  15.8  16.3  17.9  16.6  15.3  14.4  14.9  14.5  13.2  13.3 |   14.9
                    |                                                                         |
Maximum Daily Avg   |  16.0  14.0  25.9  15.1  16.9   9.9  10.4  13.2  17.4  13.0  13.6  14.0 |   25.9
                    |                                                                         |
Maximum 2-Minute Avg|    32    32    46    31    29    25    22    32    31    31    36    32 |     46
                    |                                                                         |
Date of Max 2min-Day|    09    02    12    03    01    05    02    17    24    17    19    02 |
               -Year|  2002  2000  2003  2001  2001  2007  2003  1998  2005  2005  2004  2007 |
                    |                                                                         |
Maximum Peak Gust   |    44    47    61    43    37    35    31    40    40    48    47    48 |     61
                    |                                                                         |
Date of Max Gust-Day|    09    02    12    20    01    18    24    16    24    17    19    02 |
               -Year|  2002  2000  2003  2002  2001  2005  2003  1998  2005  2005  2004  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   1.5   1.2   2.2   1.2   0.8   0.4   0.1   0.5   0.8   1.1   1.4   1.6 |   12.7
   Peak Gust >=40   |   0.5   0.2   0.7   0.1   0.0   0.0   0.0   0.1   0.1   0.2   0.2   0.3 |    2.3
   Peak Gust >=50   |   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
   Max 2-Minute >=30|   0.2   0.2   0.6   0.2   0.0   0.0   0.0   0.2   0.1   0.2   0.2   0.0 |    1.8
   Max 2-Minute >=40|   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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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.