STATION:  MILES CITY-FRANK WILEY FIELD AIRPORT (KMLS), MT

CLIMATOLOGICAL SUMMARY.  Period of Record: Nov 2000 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        |  32.8  34.2  46.3  59.7  67.9  78.4  91.8  87.9  75.1  59.0  45.4  33.5 |   59.3
Avg Min Temp        |  11.2  12.3  22.6  33.9  42.9  52.7  61.9  58.0  47.0  34.2  21.5  11.5 |   34.1
Avg Temperature     |  22.0  23.3  34.5  46.8  55.4  65.5  76.9  72.9  61.0  46.6  33.4  22.5 |   46.7
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    63    68    83    85    97   105   113   107   103    94    75    62 |    113
                    |                                                                         |
    Date of Ext-Day |    08    22    31    27    13    28    18    11    04    01    07    04 |
               -Year|  2002  2002  2004  2001  2001  2002  2003  2003  2007  2005  2006  2007 |
                    |                                                                         |
    Extreme Min Temp|   -34   -18   -22     7    17    34    48    39    25     6   -18   -24 |    -34
                    |                                                                         |
    Date of Ext-Day |    14    24    21    03    13    18    06    17    30    31    23    12 |
               -Year|  2005  2003  2002  2002  2004  2004  2004  2002  2003  2006  2003  2000 |
                    |                                                                         |
Heating Degree Days |  1332  1179   947   547   315    87     2    17   182   574   947  1317 |   7446
Cooling Degree Days |     0     0     0     1    18   103   366   263    63     3     0     0 |    817
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.6   3.8  19.1  15.0   4.0   0.1   0.0   0.0 |   42.7
    Max Temp >= 75  |   0.0   0.0   0.4   3.4   9.5  19.2  30.6  28.6  15.6   3.8   0.1   0.0 |  111.2
    Max Temp <= 32  |  13.4  11.2   4.5   0.1   0.0   0.0   0.0   0.0   0.0   1.0   6.1  11.2 |   47.6
                    |                                                                         |
    Min Temp <= 32  |  30.4  27.7  26.5  12.2   4.1   0.0   0.0   0.0   0.6  11.7  25.7  30.4 |  169.4
    Min Temp <= 20  |  21.4  19.0   9.1   1.6   0.1   0.0   0.0   0.0   0.0   2.0  11.7  22.4 |   87.2
    Min Temp  <= 0  |   7.6   6.0   2.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.4   6.2 |   23.4
                    |                                                                         |
Avg Dew Point Temp  |  13.9  14.7  22.3  30.5  39.0  48.2  50.5  46.8  40.4  30.8  21.1  13.6 |   31.0
Avg Wet Bulb Temp   |  19.3  20.3  29.6  39.5  47.3  55.9  61.4  57.7  50.2  39.1  28.3  19.5 |   39.0
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.14 30.13 30.09 30.07 30.03 29.93 29.89 29.92 30.00 30.07 30.12 30.12 |  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   0.0   1.8   4.6   7.6   6.9   4.5   1.6   0.1   0.0   0.1 |   27.4
    Heavy Fog       |   2.4   1.1   3.2   1.5   0.8   0.9   0.2   0.1   0.6   0.4   1.0   2.3 |   14.6
    Fog             |  11.6  10.9  11.1   8.8   8.9   7.5   3.1   1.8   4.1   5.9   6.0   8.2 |   87.9
    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     |  0.10  0.19  0.67  1.12  2.57  2.59  1.35  0.61  1.00  1.09  0.21  0.17 |  11.67
                    |                                                                         |
Maximum Daily       |  0.11  0.17  1.20  1.33  1.34  2.02  1.72  0.66  0.93  0.96  0.23  0.34 |   2.02
                    |                                                                         |
    Date of Ext-Day |    15    08    30    06    07    06    31    29    22    04    12    27 |
               -Year|  2003  2002  2006  2006  2005  2007  2001  2002  2006  2005  2005  2003 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   3.2   4.1   6.0   8.2  12.3  12.4   6.7   6.3   7.9   7.2   4.6   3.2 |   82.3
    >= 0.10         |   0.2   0.5   1.2   3.5   6.7   5.9   3.2   1.5   2.0   2.8   0.6   0.3 |   28.4
    >= 0.25         |   0.0   0.0   0.8   1.4   3.4   3.3   1.7   0.8   1.4   1.5   0.0   0.2 |   14.3
    >= 0.50         |   0.0   0.0   0.4   0.2   1.3   1.8   0.9   0.3   0.6   0.8   0.0   0.0 |    6.2
    >= 1.00         |   0.0   0.0   0.1   0.1   0.3   0.3   0.1   0.0   0.0   0.0   0.0   0.0 |    0.9
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   8.8   9.3  10.3  10.6  11.2   9.9   9.3   9.4   9.2   9.4   9.4   9.1 |    9.7
Daily Avg Max 2-Min |  19.3  19.5  21.8  23.7  24.4  23.7  23.2  22.2  20.4  20.6  20.2  19.5 |   21.5
Daily Avg Peak Gust |  22.8  23.2  26.4  29.2  30.1  29.7  29.3  28.1  25.4  25.1  24.3  23.1 |   26.4
                    |                                                                         |
Maximum Daily Avg   |  24.1  22.7  24.5  30.0  23.9  23.3  20.1  19.5  22.9  20.7  23.4  27.0 |   30.0
                    |                                                                         |
Maximum 2-Minute Avg|    44    52    47    45    63    68    53    55    47    40    49    48 |     68
                    |                                                                         |
Date of Max 2min-Day|    13    11    12    18    13    20    26    02    01    13    18    17 |
               -Year|  2002  2002  2002  2006  2007  2005  2001  2008  2004  2001  2005  2003 |
                    |                                                                         |
Maximum Peak Gust   |    59    63    56    58    77    82    67    87    71    47    59    64 |     87
                    |                                                                         |
Date of Max Gust-Day|    13    11    12    18    13    20    26    02    01    13    18    20 |
               -Year|  2002  2002  2002  2006  2007  2005  2001  2008  2004  2001  2005  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   6.9   6.2   9.1  14.2  15.3  13.4  13.1  10.2   8.6   8.5   8.4   7.4 |  121.6
   Peak Gust >=40   |   2.1   1.6   3.8   4.2   5.1   4.0   3.6   3.4   1.0   2.1   2.4   2.9 |   36.4
   Peak Gust >=50   |   0.3   0.5   0.5   0.8   1.0   0.9   1.1   1.4   0.3   0.0   0.4   0.7 |    7.8
                    |                                                                         |
   Max 2-Minute >=30|   3.8   2.2   5.5   6.2   7.8   6.5   4.9   4.8   2.3   3.9   4.6   0.0 |   52.4
   Max 2-Minute >=40|   0.4   0.4   1.0   0.8   1.5   0.8   1.5   1.2   0.3   0.1   0.6   0.0 |    8.5
                    |                                                                         |
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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.