STATION:  ILIAMNA AIRPORT (PAIL), AK

CLIMATOLOGICAL SUMMARY.  Period of Record: Jan 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        |  22.0  29.3  29.3  40.5  51.6  59.9  62.8  62.0  54.3  41.3  31.6  26.4 |   42.6
Avg Min Temp        |   9.1  16.8  14.8  26.4  35.7  43.9  49.5  48.5  41.9  30.1  19.9  12.9 |   29.1
Avg Temperature     |  15.6  23.0  22.1  33.4  43.7  51.9  56.2  55.3  48.1  35.7  25.8  19.7 |   35.9
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    49    57    48    67    80    81    84    80    66    58    52    50 |     84
                    |                                                                         |
    Date of Ext-Day |    30    16    21    28    26    20    17    09    10    01    03    20 |
               -Year|  2007  1999  1998  2005  2006  2007  2002  2003  2003  2003  2002  2001 |
                    |                                                                         |
    Extreme Min Temp|   -32   -34   -16    -5    13    33    41    33    27    -1   -15   -25 |    -34
                    |                                                                         |
    Date of Ext-Day |    31    01    08    01    04    10    01    29    30    29    21    19 |
               -Year|  1999  1999  2004  2004  2001  1998  2008  1998  1998  2001  2008  2001 |
                    |                                                                         |
Heating Degree Days |  1532  1186  1331   948   661   393   277   303   507   908  1176  1411 |  10633
Cooling Degree Days |     0     0     0     0     0     0     3     1     0     0     0     0 |      5
                    |                                                                         |
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   0.7   1.7   1.2   0.0   0.0   0.0   0.0 |    3.8
    Max Temp <= 32  |  18.9  11.9  15.5   3.5   0.3   0.0   0.0   0.0   0.0   4.5  13.1  16.3 |   83.9
                    |                                                                         |
    Min Temp <= 32  |  27.3  23.0  27.1  23.1   7.5   0.0   0.0   0.0   2.3  17.2  22.9  26.4 |  176.9
    Min Temp <= 20  |  20.4  13.8  18.2   5.9   0.3   0.0   0.0   0.0   0.0   4.8  15.4  19.3 |   98.2
    Min Temp  <= 0  |  10.5   5.3   6.4   0.4   0.0   0.0   0.0   0.0   0.0   0.1   2.3   8.7 |   33.6
                    |                                                                         |
Avg Dew Point Temp  |   9.9  18.0  14.1  25.4  34.0  42.5  48.9  48.5  40.9  29.3  19.9  14.1 |   28.8
Avg Wet Bulb Temp   |  14.7  21.7  20.2  30.7  39.5  47.1  52.1  51.7  44.6  33.1  24.2  18.6 |   33.2
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.27 30.16 30.17 30.15 30.02 29.98 29.96 29.97 30.03 30.09 30.11 30.36 |  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   |   0.0   0.0   0.0   0.0   0.0   0.0   0.3   0.0   0.0   0.2   0.0   0.0 |    0.5
    Heavy Fog       |   0.9   2.0   1.8   1.4   0.7   1.0   0.7   0.6   0.1   0.2   0.8   0.3 |   10.6
    Fog             |  11.4  11.9   9.2  10.3   7.6   7.1  11.0  12.5  10.2  10.7  10.8  10.4 |  123.1
    Hail            |   0.0   0.1   0.0   0.4   0.1   0.0   0.0   0.1   0.0   0.5   0.0   0.0 |    1.1
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.98  1.15  0.60  1.00  1.08  1.66  2.98  4.25  5.28  3.46  2.15  1.33 |  25.91
                    |                                                                         |
Maximum Daily       |  0.99  0.91  0.70  0.56  0.72  1.08  1.08  2.08  2.39  2.32  1.24  1.21 |   2.39
                    |                                                                         |
    Date of Ext-Day |    20    07    31    30    23    23    19    23    29    01    19    26 |
               -Year|  2008  2003  2006  1999  1998  2007  2001  1998  2004  2003  2000  2001 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   8.3   9.4   6.9   8.7  10.3  11.7  16.0  16.5  17.9  14.7  12.0   9.9 |  142.3
    >= 0.10         |   3.3   3.5   1.9   3.8   3.6   4.3   7.9  11.0  10.5   7.8   5.8   3.9 |   67.3
    >= 0.25         |   0.8   1.2   0.4   1.1   1.2   2.3   4.3   5.6   7.0   4.4   2.5   1.5 |   32.2
    >= 0.50         |   0.4   0.5   0.1   0.2   0.3   1.0   1.8   2.8   4.0   2.0   0.9   0.6 |   14.6
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.2   0.1   0.5   0.7   0.5   0.5   0.1 |    2.4
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|  11.4  10.9  10.1   9.7   9.1   8.7   8.3   8.3   9.4  10.4  11.6  11.7 |   10.0
Daily Avg Max 2-Min |  22.1  22.3  20.6  19.9  19.0  18.3  17.4  17.5  19.5  20.5  22.3  23.2 |   20.2
Daily Avg Peak Gust |  27.0  27.1  25.1  24.3  23.2  22.7  21.5  21.7  24.5  25.4  27.5  28.5 |   24.9
                    |                                                                         |
Maximum Daily Avg   |  30.2  32.9  28.0  26.6  26.4  24.6  20.0  27.4  26.5  29.4  26.1  31.5 |   32.9
                    |                                                                         |
Maximum 2-Minute Avg|    46    54    45    46    43    39    31    44    46    48    45    51 |     54
                    |                                                                         |
Date of Max 2min-Day|    28    16    05    02    23    08    25    04    19    04    14    17 |
               -Year|  1999  2001  2000  2001  2008  2002  2004  1999  1998  2001  2006  2000 |
                    |                                                                         |
Maximum Peak Gust   |    62    66    54    60    58    51    39    54    56    58    60    62 |     66
                    |                                                                         |
Date of Max Gust-Day|    30    02    05    02    23    08    25    04    19    04    14    17 |
               -Year|  2007  2000  2000  2001  2008  2002  2004  1999  1998  2001  2006  2000 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |  10.4  10.0   9.4   8.3   5.4   4.3   3.3   4.0   8.2   8.8  11.2  13.2 |   96.4
   Peak Gust >=40   |   4.5   5.2   3.1   1.8   1.5   0.6   0.0   0.8   2.2   3.4   4.4   4.8 |   32.3
   Peak Gust >=50   |   1.1   1.5   0.3   0.4   0.1   0.1   0.0   0.1   0.4   0.5   1.0   0.8 |    6.2
                    |                                                                         |
   Max 2-Minute >=30|   6.6   6.7   4.6   3.4   1.8   0.9   0.5   1.0   3.2   4.5   6.0   0.0 |   39.2
   Max 2-Minute >=40|   1.3   2.1   0.6   0.5   0.3   0.0   0.0   0.1   0.1   0.7   0.9   0.0 |    6.6
                    |                                                                         |
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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.