STATION:  BURLEY MUNICIPAL AIRPORT (KBYI), ID

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 1996 to Dec 2008

Summaries based on unedited daily ASOS data.  Errors may be present.

-----------------------------------------------------------------------------------------------

TEMPERATURE (F)     |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Avg Max Temp        |  36.8  40.3  52.5  59.3  69.3  77.8  88.8  86.6  75.7  62.8  48.8  37.0 |   61.3
Avg Min Temp        |  21.4  22.6  29.3  34.5  42.6  48.6  55.6  52.9  43.8  35.4  27.4  21.4 |   36.3
Avg Temperature     |  29.1  31.4  40.9  46.9  56.0  63.2  72.2  69.7  59.8  49.1  38.1  29.2 |   48.8
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    64    62    78    88    97    97   107   105    97    85    77    59 |    107
                    |                                                                         |
    Date of Ext-Day |    31    28    19    27    28    20    30    11    03    01    06    11 |
               -Year|  2003  1999  1997  2000  2003  1999  2000  1996  1998  2003  1999  2004 |
                    |                                                                         |
    Extreme Min Temp|    -4    -5     2    15    25    34    42    36    30    13     2    -5 |     -5
                    |                                                                         |
    Date of Ext-Day |    05    14    17    01    02    11    12    31    13    13    29    25 |
               -Year|  2004  2004  2002  2008  2008  2008  2008  2005  2003  2008  2004  1997 |
                    |                                                                         |
Heating Degree Days |  1113   948   748   542   294   110     4    20   186   493   808  1111 |   6376
Cooling Degree Days |     0     0     0     0    13    56   228   166    29     0     0     0 |    493
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.5   3.8  15.1  12.0   1.8   0.0   0.0   0.0 |   33.1
    Max Temp >= 75  |   0.0   0.0   0.3   2.1  10.7  19.2  30.4  28.8  16.5   4.4   0.2   0.0 |  112.6
    Max Temp <= 32  |   9.1   5.1   0.5   0.0   0.0   0.0   0.0   0.0   0.0   0.1   2.2   9.9 |   26.9
                    |                                                                         |
    Min Temp <= 32  |  27.9  25.7  21.6  11.8   2.5   0.0   0.0   0.0   1.3   9.8  21.8  27.3 |  149.8
    Min Temp <= 20  |  13.9  10.5   2.5   0.5   0.0   0.0   0.0   0.0   0.0   0.5   6.6  13.8 |   48.4
    Min Temp  <= 0  |   0.7   0.4   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.8 |    1.8
                    |                                                                         |
Avg Dew Point Temp  |  20.8  22.1  26.8  30.1  36.4  42.9  49.7  45.9  39.0  32.1  26.7  22.7 |   32.9
Avg Wet Bulb Temp   |  24.6  26.7  34.3  38.9  46.1  52.1  58.8  55.6  48.3  40.3  32.2  26.4 |   40.4
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
Avg Sea Level Pres  | 30.22 30.14 30.05 29.98 29.93 29.91 29.90 29.91 29.97 30.06 30.17 30.19 |  30.03
(Inches of Mercury) |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
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   0.1   1.3   3.2   3.2   3.6   3.4   1.6   0.1   0.1   0.1 |   16.6
    Heavy Fog       |   3.2   2.5   1.5   0.5   0.0   0.2   0.0   0.1   0.1   0.0   1.2   2.5 |   11.8
    Fog             |  12.9   9.2   5.9   4.7   2.8   1.5   0.4   0.9   1.5   2.5   7.7  10.9 |   61.1
    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
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  1.13  0.60  0.74  1.20  1.50  0.64  0.21  0.30  0.55  0.76  0.81  1.25 |   9.70
                    |                                                                         |
Maximum Daily       |  0.70  0.56  0.56  0.81  1.20  0.59  0.42  0.66  0.67  0.73  0.74  0.73 |   1.20
                    |                                                                         |
    Date of Ext-Day |    20    07    15    19    16    08    19    21    10    11    18    08 |
               -Year|  1999  2004  2003  2005  2005  1998  2004  2003  1998  2008  1996  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.8   6.7   7.6   9.2   8.3   5.5   2.8   4.1   4.1   5.4   7.2  10.0 |   80.6
    >= 0.10         |   3.8   1.7   2.5   4.1   4.0   2.0   0.8   0.8   1.8   2.5   3.0   4.1 |   31.2
    >= 0.25         |   1.3   0.5   0.7   1.6   1.8   0.8   0.2   0.2   0.7   0.9   0.9   1.5 |   11.5
    >= 0.50         |   0.3   0.1   0.1   0.3   0.9   0.2   0.0   0.1   0.4   0.5   0.2   0.5 |    3.4
    >= 1.00         |   0.0   0.0   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   8.9   8.7   9.7   9.3   8.6   7.9   6.3   6.3   6.3   7.4   8.1   9.1 |    8.0
Daily Avg Max 2-Min |  19.4  19.3  21.2  21.9  21.1  19.5  17.7  17.6  17.4  17.8  18.8  20.2 |   19.3
Daily Avg Peak Gust |  24.5  24.1  26.9  28.2  27.4  25.3  22.7  22.7  22.5  22.8  24.0  25.4 |   24.7
                    |                                                                         |
Maximum Daily Avg   |  23.6  20.6  21.9  24.4  21.3  22.6  13.8  17.0  18.0  21.1  24.9  25.5 |   25.5
                    |                                                                         |
Maximum 2-Minute Avg|    39    39    40    41    45    48    51    44    40    38    39    43 |     51
                    |                                                                         |
Date of Max 2min-Day|    01    16    09    06    09    22    06    21    02    10    08    14 |
               -Year|  2004  2003  2006  2006  2005  2005  2007  2003  2007  2002  2002  2003 |
                    |                                                                         |
Maximum Peak Gust   |    52    48    56    61    59    59    67    48    54    48    56    58 |     67
                    |                                                                         |
Date of Max Gust-Day|    15    08    09    06    20    22    06    21    02    10    26    28 |
               -Year|  2008  2002  2006  2006  2008  2005  2007  2003  2007  2002  2005  2005 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   8.0   7.0  11.2  12.8  11.4   8.8   6.1   6.5   5.8   6.8   7.8  10.4 |  102.6
   Peak Gust >=40   |   2.0   1.9   2.8   3.6   2.6   2.1   1.5   1.4   1.9   1.9   2.0   3.4 |   27.0
   Peak Gust >=50   |   0.5   0.0   0.2   0.4   0.9   0.5   0.2   0.0   0.1   0.0   0.2   0.4 |    3.5
                    |                                                                         |
   Max 2-Minute >=30|   2.5   2.1   4.1   4.9   3.5   2.5   1.5   1.4   1.9   2.3   2.8   0.0 |   29.5
   Max 2-Minute >=40|   0.0   0.0   0.1   0.2   0.5   0.2   0.2   0.1   0.1   0.0   0.0   0.0 |    1.6
                    |                                                                         |
------------------------------------------------------------------------------------------------------

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.