STATION:  HAVRE CITY-COUNTY AIRPORT (KHVR), MT

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        |  29.5  34.8  44.6  58.0  67.8  75.2  87.9  85.8  72.7  58.5  42.8  32.6 |   57.5
Avg Min Temp        |   7.0  12.7  19.9  29.9  39.6  48.3  54.2  51.9  41.9  30.2  19.8  10.1 |   30.5
Avg Temperature     |  18.2  23.7  32.3  43.9  53.7  61.7  71.1  68.9  57.3  44.4  31.3  21.3 |   44.0
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    64    64    79    91    96   100   106   109   101    84    78    63 |    109
                    |                                                                         |
    Date of Ext-Day |    23    22    30    28    24    28    23    03    02    18    12    13 |
               -Year|  2005  2002  2004  2001  2001  2006  2007  2001  1998  2003  1999  1998 |
                    |                                                                         |
    Extreme Min Temp|   -41   -31   -27     4    14    27    39    34    21    -2   -27   -33 |    -41
                    |                                                                         |
    Date of Ext-Day |    11    24    09    02    02    03    26    17    23    31    21    28 |
               -Year|  1997  2003  2002  2002  2005  1998  1999  2002  2000  2003  1996  1996 |
                    |                                                                         |
Heating Degree Days |  1450  1166  1015   632   359   136    20    41   254   641  1011  1354 |   8079
Cooling Degree Days |     0     0     0     1     9    38   208   160    23     1     0     0 |    440
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.1   0.8   1.9  13.9  12.0   2.4   0.0   0.0   0.0 |   31.1
    Max Temp >= 75  |   0.0   0.0   0.3   2.4   8.7  16.8  29.3  26.8  13.5   2.8   0.1   0.0 |  100.6
    Max Temp <= 32  |  14.2  10.5   6.3   0.9   0.0   0.0   0.0   0.0   0.0   0.6   6.7  12.3 |   51.5
                    |                                                                         |
    Min Temp <= 32  |  29.7  27.7  28.4  17.6   6.1   0.2   0.0   0.0   3.2  18.8  25.8  30.1 |  187.7
    Min Temp <= 20  |  21.8  19.0  12.4   3.7   0.3   0.0   0.0   0.0   0.0   3.4  13.7  22.4 |   96.7
    Min Temp  <= 0  |  11.0   5.2   2.9   0.0   0.0   0.0   0.0   0.0   0.0   0.1   2.6   7.9 |   29.8
                    |                                                                         |
Avg Dew Point Temp  |  11.8  15.5  20.6  27.8  35.6  45.8  47.8  44.4  39.0  29.8  20.9  13.1 |   29.3
Avg Wet Bulb Temp   |  16.7  20.9  27.7  37.2  45.3  53.2  57.8  55.5  47.7  37.6  27.3  18.9 |   37.2
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.14 30.10 30.09 30.05 29.98 29.94 29.91 29.95 29.98 30.06 30.11 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   1.2   2.8   8.9   8.6   6.3   2.2   0.5   0.0   0.0 |   30.8
    Heavy Fog       |   2.8   2.8   2.3   1.2   0.8   0.3   0.2   0.2   0.2   1.4   1.5   1.8 |   15.4
    Fog             |  11.9  11.8  11.6   6.0   5.2   6.7   2.3   2.6   4.2   5.7   8.1   8.6 |   84.7
    Hail            |   0.0   0.0   0.0   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.21  0.26  0.34  0.83  1.80  2.57  0.98  0.80  1.01  0.50  0.34  0.25 |   9.89
                    |                                                                         |
Maximum Daily       |  0.22  0.38  0.71  0.98  0.99  1.51  1.33  1.16  0.89  0.43  0.48  0.48 |   1.51
                    |                                                                         |
    Date of Ext-Day |    20    23    27    19    23    03    12    08    23    12    05    28 |
               -Year|  2007  2007  2007  2007  2004  1999  2001  2002  2007  2000  2008  1998 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   5.0   5.4   5.3   6.8   9.7  13.4   6.8   7.1   7.3   5.6   4.7   5.2 |   82.3
    >= 0.10         |   0.5   0.8   0.9   2.3   4.8   6.1   2.3   2.2   3.1   1.9   1.0   0.7 |   26.6
    >= 0.25         |   0.0   0.1   0.3   1.1   2.4   3.3   1.2   1.0   1.2   0.3   0.2   0.2 |   11.3
    >= 0.50         |   0.0   0.0   0.1   0.2   1.1   1.4   0.7   0.2   0.2   0.0   0.0   0.0 |    3.9
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.6   0.2   0.1   0.0   0.0   0.0   0.0 |    0.8
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|  10.1   9.6  10.6  10.6  11.1  10.1   9.2   9.2   9.3   9.8  10.4  10.8 |   10.1
Daily Avg Max 2-Min |  21.2  20.5  22.6  23.3  23.7  23.0  23.6  22.6  21.5  22.0  22.0  22.4 |   22.4
Daily Avg Peak Gust |  24.9  24.0  26.9  28.5  29.5  28.1  29.6  27.8  26.1  26.2  26.0  26.4 |   27.0
                    |                                                                         |
Maximum Daily Avg   |  23.5  24.5  25.5  24.0  26.6  26.5  23.9  22.8  22.3  22.8  26.3  25.7 |   26.6
                    |                                                                         |
Maximum 2-Minute Avg|    46    45    51    49    46    58    52    49    56    60    52    46 |     60
                    |                                                                         |
Date of Max 2min-Day|    03    11    24    04    19    04    04    06    09    31    13    13 |
               -Year|  2003  2002  2008  2000  2001  2006  1996  2004  1998  1999  2006  2006 |
                    |                                                                         |
Maximum Peak Gust   |    55    54    62    60    61    76    67    63    63    69    60    53 |     76
                    |                                                                         |
Date of Max Gust-Day|    03    01    24    12    19    04    04    06    09    31    12    17 |
               -Year|  2003  2006  2008  2003  2001  2006  2008  2004  1998  1999  2007  2001 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   9.0   6.9  11.3  12.7  14.5  12.6  13.1  11.1   9.9  10.1   9.9  11.3 |  132.4
   Peak Gust >=40   |   2.5   1.6   2.4   3.2   4.0   3.0   4.2   3.3   2.4   2.9   2.7   2.7 |   34.9
   Peak Gust >=50   |   0.1   0.3   0.4   0.5   0.4   0.5   1.3   0.5   0.5   0.5   0.2   0.3 |    5.6
                    |                                                                         |
   Max 2-Minute >=30|   5.1   3.1   5.7   4.8   6.6   5.4   6.6   5.4   4.2   5.5   5.3   0.0 |   57.6
   Max 2-Minute >=40|   0.3   0.4   0.5   0.6   0.6   1.0   1.5   0.5   0.6   0.8   0.5   0.0 |    7.4
                    |                                                                         |
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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.