STATION:  DOUGLAS CONVERSE COUNTY AIRPORT (KDGW), WY

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 1999 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        |  40.0  39.9  48.5  59.2  68.6  80.6  91.1  87.2  74.9  61.6  48.6  38.4 |   61.5
Avg Min Temp        |  12.8  13.8  21.9  30.0  38.4  47.2  55.9  53.4  41.6  30.8  19.9  12.4 |   31.5
Avg Temperature     |  26.4  26.9  35.2  44.6  53.5  63.9  73.5  70.3  58.2  46.2  34.2  25.4 |   46.5
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    70    66    77    81    97   101   105   103    98    87    76    63 |    105
                    |                                                                         |
    Date of Ext-Day |    10    01    31    29    29    29    16    13    04    01    07    01 |
               -Year|  2003  2003  2004  2007  2003  2002  2005  2007  2001  2005  1999  1999 |
                    |                                                                         |
    Extreme Min Temp|   -17   -30    -5     3    16    29    40    34    14     4   -14   -21 |    -30
                    |                                                                         |
    Date of Ext-Day |    24    24    01    01    09    05    12    28    25    31    12    07 |
               -Year|  2008  2003  2002  2008  2002  2001  2008  2004  2000  2002  2000  2005 |
                    |                                                                         |
Heating Degree Days |  1197  1078   923   613   364   111     6    23   231   583   923  1228 |   7279
Cooling Degree Days |     0     0     0     0     7    79   269   187    28     0     0     0 |    571
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.3   7.0  20.3  14.0   3.1   0.0   0.0   0.0 |   44.8
    Max Temp >= 75  |   0.0   0.0   0.4   2.9  10.1  21.7  30.1  28.8  16.8   4.9   0.2   0.0 |  115.9
    Max Temp <= 32  |   8.8   7.8   4.1   0.9   0.0   0.0   0.0   0.0   0.1   0.6   4.9   8.8 |   36.0
                    |                                                                         |
    Min Temp <= 32  |  29.8  27.3  27.9  18.8   6.6   0.4   0.0   0.0   3.5  17.8  26.8  29.8 |  188.8
    Min Temp <= 20  |  23.0  19.2  11.5   2.6   0.4   0.0   0.0   0.0   0.1   2.7  14.3  22.7 |   96.7
    Min Temp  <= 0  |   5.4   3.7   0.9   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.7   5.3 |   17.0
                    |                                                                         |
Avg Dew Point Temp  |  14.1  15.7  22.2  27.7  37.4  42.0  47.4  45.5  37.5  29.4  19.4  14.3 |   29.4
Avg Wet Bulb Temp   |  21.8  23.0  29.8  37.1  45.5  52.2  58.4  56.3  47.4  38.1  28.4  21.5 |   38.3
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.15 30.09 30.06 30.07 29.99 29.95 29.91 29.93 29.99 30.06 30.13 30.15 |  30.04
(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   |   0.1   0.0   0.2   1.3   3.9   5.9   6.3   5.7   3.0   0.3   0.0   0.0 |   26.8
    Heavy Fog       |   2.9   2.4   3.2   1.4   1.3   0.4   0.3   0.4   1.2   1.1   1.8   2.1 |   18.7
    Fog             |   9.6  10.3  13.0   9.7   8.8   4.4   2.5   2.8   5.9   7.6   7.2   8.7 |   90.4
    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     |  0.24  0.29  0.79  1.36  1.95  1.09  0.85  0.94  1.41  0.82  0.33  0.23 |  10.29
                    |                                                                         |
Maximum Daily       |  0.31  0.31  0.70  1.01  2.52  1.20  0.74  1.73  0.99  1.26  0.51  0.21 |   2.52
                    |                                                                         |
    Date of Ext-Day |    08    17    26    18    22    15    23    17    03    31    13    08 |
               -Year|  2006  2000  2003  2000  2008  2003  2004  2003  1999  2000  2008  2003 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   3.9   5.4   7.9   8.3  10.0   7.7   5.9   6.2   8.8   6.6   3.9   5.4 |   80.1
    >= 0.10         |   0.6   1.0   2.6   3.3   4.8   3.2   2.2   1.9   4.2   2.3   0.9   0.7 |   27.7
    >= 0.25         |   0.1   0.1   0.6   1.9   2.2   1.8   1.0   1.0   2.2   0.9   0.4   0.0 |   12.2
    >= 0.50         |   0.0   0.0   0.2   0.8   1.0   0.3   0.6   0.5   0.7   0.2   0.1   0.0 |    4.4
    >= 1.00         |   0.0   0.0   0.0   0.1   0.2   0.1   0.0   0.2   0.0   0.1   0.0   0.0 |    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|   9.6  10.0  11.0  11.7  10.8  10.4   9.0   9.5   8.6   9.3   9.8  10.2 |   10.0
Daily Avg Max 2-Min |  24.0  24.1  25.7  26.6  26.1  26.2  24.4  24.4  23.1  23.1  24.5  25.0 |   24.8
Daily Avg Peak Gust |  28.3  28.6  30.5  32.1  31.8  32.1  30.3  29.9  28.1  27.8  29.4  29.8 |   29.9
                    |                                                                         |
Maximum Daily Avg   |  27.1  25.3  25.8  26.0  29.3  20.7  18.4  18.4  23.5  20.1  24.8  30.9 |   30.9
                    |                                                                         |
Maximum 2-Minute Avg|    52    48    51    52    52    53    53    53    49    45    51    49 |     53
                    |                                                                         |
Date of Max 2min-Day|    05    14    27    19    29    02    26    22    09    23    11    30 |
               -Year|  2008  2000  2008  2001  2008  2002  2002  2007  2000  2001  2003  2004 |
                    |                                                                         |
Maximum Peak Gust   |    67    56    60    61    63    62    78    69    64    55    61    56 |     78
                    |                                                                         |
Date of Max Gust-Day|    05    16    27    19    29    02    29    16    09    23    03    30 |
               -Year|  2008  2007  2008  2001  2008  2002  2000  2002  2000  2001  2005  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |  12.7  13.0  15.0  18.0  17.9  16.2  14.5  14.5  12.5  12.3  14.1  16.4 |  177.2
   Peak Gust >=40   |   6.1   3.8   6.0   6.3   6.2   5.8   3.8   4.0   2.6   2.4   5.3   5.7 |   58.1
   Peak Gust >=50   |   1.2   0.6   1.3   1.0   1.2   0.7   0.8   0.7   0.5   0.2   0.8   1.0 |   10.0
                    |                                                                         |
   Max 2-Minute >=30|   9.4   7.1   9.4  10.1   9.4   9.0   6.6   7.3   5.1   5.2   8.0   0.0 |   86.8
   Max 2-Minute >=40|   2.2   0.9   2.5   1.3   1.6   1.2   1.0   0.8   0.6   0.3   1.3   0.0 |   13.7
                    |                                                                         |
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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.