STATION:  RIFLE-GARFIELD CO REGIONAL ARPT (KRIL), CO

CLIMATOLOGICAL SUMMARY.  Period of Record: Jun 1997 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        |  37.8  43.0  53.9  63.3  75.0  85.7  92.5  87.9  78.4  65.3  49.4  36.6 |   64.1
Avg Min Temp        |  14.8  20.1  25.8  32.3  39.3  46.6  55.0  53.5  44.4  33.4  23.1  13.8 |   33.5
Avg Temperature     |  26.3  31.6  39.8  47.8  57.1  66.2  73.8  70.7  61.4  49.4  36.3  25.2 |   48.8
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    56    63    79    84    99    99   103   101    94    85    74    61 |    103
                    |                                                                         |
    Date of Ext-Day |    19    27    21    29    31    30    13    01    04    01    02    01 |
               -Year|  2000  2006  2004  2007  2002  1998  2002  2000  2000  2003  2008  1999 |
                    |                                                                         |
    Extreme Min Temp|   -15    -9    -2    15    23    31    38    36    23    16   -11   -21 |    -21
                    |                                                                         |
    Date of Ext-Day |    15    09    02    01    03    08    02    28    29    23    30    22 |
               -Year|  2007  2001  2002  2008  2008  2007  1997  2004  1999  2008  2004  1998 |
                    |                                                                         |
Heating Degree Days |  1200   945   780   517   255    59     0     4   135   485   862  1234 |   6475
Cooling Degree Days |     0     0     0     0    11    94   272   180    28     0     0     0 |    586
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   1.6  11.8  22.4  13.5   1.9   0.0   0.0   0.0 |   51.2
    Max Temp >= 75  |   0.0   0.0   0.4   3.0  18.0  26.4  30.9  30.2  21.5   5.1   0.0   0.0 |  135.5
    Max Temp <= 32  |   7.1   2.4   0.7   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.7   9.0 |   20.9
                    |                                                                         |
    Min Temp <= 32  |  30.6  27.3  26.9  15.8   4.4   0.2   0.0   0.0   1.4  14.1  27.1  30.8 |  178.7
    Min Temp <= 20  |  21.0  13.3   4.5   0.6   0.0   0.0   0.0   0.0   0.0   0.4   9.9  23.7 |   73.5
    Min Temp  <= 0  |   2.9   0.6   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.5   2.2 |    6.5
                    |                                                                         |
Avg Dew Point Temp  |  16.9  19.7  22.9  25.7  30.6  33.7  42.7  45.2  37.5  29.1  22.3  16.0 |   28.5
Avg Wet Bulb Temp   |  22.6  26.6  32.5  38.1  44.5  49.9  56.3  55.2  48.7  39.4  29.9  21.5 |   38.8
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.23 30.14 30.06 29.97 29.94 29.90 29.93 29.97 30.00 30.07 30.17 30.24 |  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   0.1   0.5   1.5   2.9   4.3   7.9   9.6   4.2   1.4   0.1   0.0 |   32.5
    Heavy Fog       |   1.7   1.5   1.4   0.4   0.1   0.2   0.0   0.1   0.5   0.6   1.0   1.4 |    8.8
    Fog             |   9.4   9.4   8.1   6.5   3.3   2.6   1.9   2.9   5.0   5.9   6.2   8.2 |   69.5
    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     |  0.59  0.67  0.88  0.94  0.86  0.76  0.78  1.17  1.64  1.36  0.68  0.61 |  10.93
                    |                                                                         |
Maximum Daily       |  0.61  0.35  0.45  0.68  0.68  1.25  1.05  0.88  1.16  1.00  0.43  0.88 |   1.25
                    |                                                                         |
    Date of Ext-Day |    11    04    26    30    04    10    23    05    03    09    27    01 |
               -Year|  2005  2008  1998  1999  2003  2005  2005  2002  2005  2001  2008  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   7.5   8.0   8.4   8.3   6.2   5.4   7.7  10.8   8.7   8.5   6.6   6.9 |   92.9
    >= 0.10         |   2.5   2.6   3.1   3.4   2.7   2.4   2.4   4.0   4.9   4.3   2.8   1.6 |   36.7
    >= 0.25         |   0.3   0.5   0.8   1.0   1.4   0.9   0.8   1.4   2.8   2.1   0.6   0.5 |   13.1
    >= 0.50         |   0.1   0.0   0.0   0.4   0.3   0.1   0.3   0.3   0.6   0.7   0.0   0.2 |    2.9
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.1   0.1   0.0   0.1   0.1   0.0   0.0 |    0.3
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   3.3   4.2   5.7   7.0   6.9   6.7   5.7   5.3   5.3   5.0   3.8   3.3 |    5.2
Daily Avg Max 2-Min |  12.5  16.3  20.3  23.6  24.1  23.8  22.8  22.1  20.6  19.2  14.6  12.6 |   19.4
Daily Avg Peak Gust |  14.9  19.9  25.2  30.0  30.6  30.6  28.8  27.7  25.9  23.9  17.7  15.0 |   24.2
                    |                                                                         |
Maximum Daily Avg   |  11.3  15.6  15.7  18.6  17.4  18.6  10.6  11.2  15.2  14.8  12.7  12.6 |   18.6
                    |                                                                         |
Maximum 2-Minute Avg|    39    54    46    49    48    47    45    46    45    49    41    37 |     54
                    |                                                                         |
Date of Max 2min-Day|    26    05    26    16    03    12    26    28    15    07    17    13 |
               -Year|  1999  2006  2003  2002  2007  2001  2002  1997  2006  1997  1998  2008 |
                    |                                                                         |
Maximum Peak Gust   |    53    90    54    60    61    62    60    60    60    89    60    52 |     90
                    |                                                                         |
Date of Max Gust-Day|    11    05    26    18    03    12    26    15    07    01    17    13 |
               -Year|  2007  2006  2006  2000  2007  2001  2006  2006  2002  2002  1998  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   1.9   4.5   8.2  14.9  16.8  16.4  14.2  11.9   9.2   7.8   3.4   2.4 |  111.7
   Peak Gust >=40   |   0.5   0.9   2.1   4.2   4.5   3.8   3.7   2.7   3.0   2.3   0.9   0.4 |   28.9
   Peak Gust >=50   |   0.3   0.4   0.5   0.8   0.8   0.8   0.5   0.7   0.6   0.6   0.1   0.1 |    6.1
                    |                                                                         |
   Max 2-Minute >=30|   0.5   1.8   2.7   5.2   5.9   4.7   4.8   4.1   3.3   2.6   1.4   0.0 |   37.0
   Max 2-Minute >=40|   0.0   0.2   0.2   0.6   0.8   0.6   0.8   0.6   0.5   0.6   0.1   0.0 |    5.0
                    |                                                                         |
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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.