STATION:  BETTLES AIRPORT (PABT), 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        |  -2.5   7.5  15.1  35.0  54.5  70.2  69.2  62.6  49.4  27.4   9.4   2.7 |   33.4
Avg Min Temp        | -18.8 -11.7 -11.5  12.7  33.3  47.5  48.8  42.0  32.8  13.5  -5.2 -13.4 |   14.2
Avg Temperature     | -10.6  -2.1   1.8  23.9  43.9  58.8  59.0  52.3  41.1  20.5   2.1  -5.4 |   23.8
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    35    37    42    59    80    92    90    86    70    57    37    35 |     92
                    |                                                                         |
    Date of Ext-Day |    19    11    30    30    24    13    02    04    03    02    22    26 |
               -Year|  2002  2006  2000  2005  2002  1999  1999  1999  2008  2003  2007  2001 |
                    |                                                                         |
    Extreme Min Temp|   -57   -64   -47   -35     5    28    30    25     2   -31   -41   -55 |    -64
                    |                                                                         |
    Date of Ext-Day |    11    09    10    01    02    03    28    24    29    27    26    02 |
               -Year|  2005  1999  2006  2004  2001  2006  2000  2002  2004  2008  2003  2003 |
                    |                                                                         |
Heating Degree Days |  2345  1896  1959  1234   654   197   200   395   717  1381  1887  2182 |  15046
Cooling Degree Days |     0     0     0     0     0    13    14     2     0     0     0     0 |     29
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.0   0.1   0.1   0.0   0.0   0.0   0.0   0.0 |    0.2
    Max Temp >= 75  |   0.0   0.0   0.0   0.0   0.5   9.9   8.4   2.6   0.0   0.0   0.0   0.0 |   21.4
    Max Temp <= 32  |  30.6  27.3  29.3  10.9   0.7   0.0   0.0   0.0   0.9  20.8  28.8  30.8 |  180.1
                    |                                                                         |
    Min Temp <= 32  |  31.0  28.2  31.0  28.8  14.7   0.4   0.2   3.2  13.8  29.6  30.0  31.0 |  241.9
    Min Temp <= 20  |  30.7  28.0  30.7  19.2   2.2   0.0   0.0   0.0   2.4  21.3  28.8  30.8 |  194.1
    Min Temp  <= 0  |  25.1  21.2  25.3   6.2   0.0   0.0   0.0   0.0   0.0   5.5  18.3  25.2 |  126.7
                    |                                                                         |
Avg Dew Point Temp  |  -4.7  -2.2  -5.6  11.8  28.1  43.0  47.4  43.1  32.7  15.8  -1.1  -5.1 |   16.9
Avg Wet Bulb Temp   |  -2.2   2.3   2.5  20.1  37.4  51.0  52.7  48.0  37.4  19.4   2.6  -1.9 |   22.4
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.18 30.14 30.18 30.06 30.04 29.92 29.88 29.95 30.01 30.03 30.06 30.15 |  30.05
(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   0.1   0.8   5.1   3.8   0.5   0.1   0.0   0.0   0.0 |   10.3
    Heavy Fog       |   1.3   0.9   0.4   0.6   0.2   0.7   0.8   1.4   1.5   0.7   0.6   0.7 |    9.8
    Fog             |  13.5  11.8   7.6   6.7   4.2   4.6   7.5  10.8   9.9  11.8  10.8  11.0 |  110.3
    Hail            |   0.0   0.0   0.0   0.0   0.2   0.3   0.2   0.0   0.0   0.0   0.0   0.0 |    0.7
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.84  0.96  0.39  0.83  0.96  1.48  2.58  2.36  1.94  1.12  0.81  0.82 |  15.10
                    |                                                                         |
Maximum Daily       |  0.91  0.58  0.38  0.87  0.97  0.73  1.63  1.06  0.89  0.60  0.52  0.52 |   1.63
                    |                                                                         |
    Date of Ext-Day |    03    10    01    30    30    11    15    05    21    03    08    08 |
               -Year|  2005  2003  2003  2002  1998  2002  2007  2007  2000  2003  2003  2005 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.6  10.1   5.9   7.4   9.1  11.1  14.3  14.2  12.8  12.7  10.2  10.5 |  127.9
    >= 0.10         |   2.4   3.6   1.1   3.3   3.3   4.5   7.2   6.8   7.0   3.4   2.8   2.8 |   48.1
    >= 0.25         |   0.5   1.0   0.1   0.7   1.2   2.0   4.2   3.2   2.5   0.7   0.8   0.6 |   17.7
    >= 0.50         |   0.4   0.1   0.0   0.3   0.2   0.8   1.2   1.2   0.5   0.3   0.1   0.2 |    5.1
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.1   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.1   4.9   5.3   5.8   5.6   4.9   4.9   4.3   4.3   4.8   4.3   4.0 |    4.8
Daily Avg Max 2-Min |  10.6  11.4  11.5  12.7  13.3  14.2  13.9  12.0  11.2  10.8  10.1  10.2 |   11.8
Daily Avg Peak Gust |  13.4  14.8  14.9  16.6  17.9  19.2  18.5  16.2  14.9  14.2  12.9  13.1 |   15.6
                    |                                                                         |
Maximum Daily Avg   |  13.9  14.4  16.6  14.1  12.6  11.4  13.5  12.1  12.2  11.3  12.4  11.9 |   16.6
                    |                                                                         |
Maximum 2-Minute Avg|    28    28    29    28    22    29    35    22    24    23    26    25 |     35
                    |                                                                         |
Date of Max 2min-Day|    22    19    21    26    20    15    29    14    11    09    16    08 |
               -Year|  2008  2006  2005  2002  2003  2003  2005  2000  2003  2006  1999  2008 |
                    |                                                                         |
Maximum Peak Gust   |    40    44    48    36    35    45    43    36    32    38    40    48 |     48
                    |                                                                         |
Date of Max Gust-Day|    08    13    22    26    29    15    01    14    28    09    16    09 |
               -Year|  2004  2004  2005  2002  2002  2003  2002  2000  2007  2006  1999  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   1.5   1.9   1.7   1.2   0.4   1.1   0.4   0.3   0.3   0.7   0.4   0.7 |   10.7
   Peak Gust >=40   |   0.1   0.1   0.3   0.0   0.0   0.1   0.1   0.0   0.0   0.0   0.1   0.4 |    1.3
   Peak Gust >=50   |   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 2-Minute >=30|   0.0   0.0   0.0   0.0   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.0 |    0.2
   Max 2-Minute >=40|   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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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.