STATION:  WOLF POINT-L M CLAYTON AIRPORT (KOLF), MT

CLIMATOLOGICAL SUMMARY.  Period of Record: Sep 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        |  25.5  29.5  43.0  58.7  67.6  75.4  87.9  85.5  73.1  57.7  41.9  28.5 |   56.2
Avg Min Temp        |   1.2   4.9  17.4  28.5  38.6  48.4  55.5  52.6  40.3  28.8  16.2   4.5 |   28.1
Avg Temperature     |  13.4  17.2  30.2  43.6  53.1  61.9  71.7  69.0  56.7  43.2  29.0  16.5 |   42.1
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    61    67    80    88    96    98   111   105   101    89    78    61 |    111
                    |                                                                         |
    Date of Ext-Day |    08    22    31    27    18    28    24    14    01    09    12    11 |
               -Year|  2002  2002  2004  2001  2006  2002  2007  2003  2004  2004  1999  2004 |
                    |                                                                         |
    Extreme Min Temp|   -37   -35   -32     0    10    31    40    35    19    -2   -15   -28 |    -37
                    |                                                                         |
    Date of Ext-Day |    05    03    09    03    03    18    29    19    30    31    12    15 |
               -Year|  2005  2004  2002  2002  2005  2004  2004  2004  2003  2003  2000  2008 |
                    |                                                                         |
Heating Degree Days |  1600  1351  1078   642   375   138    14    37   277   675  1079  1503 |   8770
Cooling Degree Days |     0     0     0     0     8    45   221   162    29     1     0     0 |    465
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.4   1.8  13.2  10.4   2.6   0.0   0.0   0.0 |   28.5
    Max Temp >= 75  |   0.0   0.0   0.6   2.5   9.4  16.3  29.0  26.9  13.4   3.1   0.2   0.0 |  101.6
    Max Temp <= 32  |  20.1  15.9   6.9   0.6   0.0   0.0   0.0   0.0   0.0   1.1   8.5  17.1 |   70.1
                    |                                                                         |
    Min Temp <= 32  |  31.0  28.2  29.7  20.4   7.8   0.3   0.0   0.0   4.6  21.0  29.2  31.0 |  203.2
    Min Temp <= 20  |  28.3  24.8  15.3   5.0   0.4   0.0   0.0   0.0   0.1   4.8  17.1  27.3 |  123.1
    Min Temp  <= 0  |  13.8   9.2   2.8   0.1   0.0   0.0   0.0   0.0   0.0   0.4   2.7  10.5 |   39.5
                    |                                                                         |
Avg Dew Point Temp  |   8.7  11.5  20.6  28.4  37.7  49.1  53.1  48.9  40.0  30.2  20.3  11.0 |   29.9
Avg Wet Bulb Temp   |  12.7  15.9  26.7  37.3  46.1  54.9  60.8  57.7  48.0  37.1  25.4  15.1 |   36.5
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.16 30.15 30.10 30.03 30.01 29.97 29.92 29.94 30.02 30.07 30.12 30.14 |  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   0.2   0.1   2.7   6.2   6.2   5.1   1.2   0.3   0.0   0.0 |   21.9
    Heavy Fog       |   5.2   3.4   2.7   0.9   1.5   0.8   0.6   0.4   0.4   2.7   3.1   3.7 |   25.5
    Fog             |  17.1  14.0  12.6   8.2   9.0  10.7   5.9   4.1   4.3   8.3  10.3  12.5 |  117.0
    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     |  0.17  0.13  0.32  0.80  2.41  3.07  1.63  1.28  0.72  0.85  0.23  0.17 |  11.78
                    |                                                                         |
Maximum Daily       |  0.15  0.22  0.65  0.39  1.44  1.60  0.85  2.85  0.91  0.54  0.33  0.18 |   2.85
                    |                                                                         |
    Date of Ext-Day |    02    27    28    17    29    08    04    07    22    05    01    28 |
               -Year|  2004  2004  2007  2004  2001  2005  2000  2002  2006  2007  2000  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   4.7   3.4   5.6   7.6  11.3  14.2   9.3   6.9   6.4   7.2   4.0   4.1 |   84.7
    >= 0.10         |   0.3   0.3   0.6   3.3   5.8   7.3   4.4   2.9   1.9   2.6   0.6   0.5 |   30.6
    >= 0.25         |   0.0   0.0   0.2   1.1   3.0   3.8   2.3   1.4   1.2   1.2   0.2   0.0 |   14.3
    >= 0.50         |   0.0   0.0   0.1   0.0   1.3   1.8   1.2   0.5   0.1   0.2   0.0   0.0 |    5.2
    >= 1.00         |   0.0   0.0   0.0   0.0   0.5   0.7   0.0   0.1   0.0   0.0   0.0   0.0 |    1.3
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   7.0   7.5   9.1   9.8  10.1   8.7   7.9   8.1   7.4   7.6   7.4   7.4 |    8.2
Daily Avg Max 2-Min |  17.0  17.1  20.3  22.3  23.0  21.5  21.3  20.4  19.0  19.0  18.1  17.6 |   19.7
Daily Avg Peak Gust |  20.1  20.3  24.7  28.1  28.8  27.0  27.0  25.9  24.0  23.4  22.1  21.0 |   24.4
                    |                                                                         |
Maximum Daily Avg   |  21.8  23.5  24.2  24.2  25.1  22.6  22.4  19.6  20.7  23.0  26.7  23.2 |   26.7
                    |                                                                         |
Maximum 2-Minute Avg|    45    45    49    48    47    66    56    47    41    52    43    45 |     66
                    |                                                                         |
Date of Max 2min-Day|    08    11    10    05    11    08    28    16    01    31    09    27 |
               -Year|  2007  2002  2004  2000  2004  2002  2008  2002  2002  1999  2004  2000 |
                    |                                                                         |
Maximum Peak Gust   |    56    60    60    60    60    78    68    62    54    67    61    54 |     78
                    |                                                                         |
Date of Max Gust-Day|    08    10    24    05    13    08    28    10    01    31    13    27 |
               -Year|  2007  2004  2008  2000  2007  2002  2008  2007  2002  1999  2007  2000 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   4.1   3.7   8.1  12.5  14.0  10.0  10.6   9.5   7.7   6.8   5.5   5.1 |   97.7
   Peak Gust >=40   |   1.0   0.6   2.3   2.9   3.6   2.8   4.0   1.6   1.2   1.7   2.1   1.5 |   25.3
   Peak Gust >=50   |   0.2   0.2   0.3   0.5   0.4   0.6   0.7   0.5   0.1   0.2   0.4   0.2 |    4.2
                    |                                                                         |
   Max 2-Minute >=30|   2.2   1.1   3.9   4.5   6.1   4.5   4.7   3.1   2.5   2.6   2.6   0.0 |   37.9
   Max 2-Minute >=40|   0.2   0.2   0.3   0.6   0.6   0.7   0.9   0.3   0.1   0.2   0.4   0.0 |    4.5
                    |                                                                         |
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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.