STATION:  IDAHO FALLS REGIONAL ARPT (KIDA), ID

CLIMATOLOGICAL SUMMARY.  Period of Record: Feb 1998 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        |  28.1  32.9  46.2  57.7  67.4  76.3  88.5  85.9  73.6  59.5  43.8  30.5 |   57.5
Avg Min Temp        |  11.8  14.3  24.3  31.1  38.0  43.7  49.8  47.1  39.4  30.3  22.2  13.6 |   30.5
Avg Temperature     |  20.0  23.6  35.3  44.4  52.7  60.0  69.2  66.5  56.5  44.9  33.0  22.1 |   44.0
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    57    54    72    81    94    95   101    99    93    83    69    54 |    101
                    |                                                                         |
    Date of Ext-Day |    31    21    30    26    28    26    13    14    03    01    06    03 |
               -Year|  2003  2000  2004  2001  2003  2002  2002  2003  1998  2008  1999  1998 |
                    |                                                                         |
    Extreme Min Temp|   -18   -17   -13    16    19    29    34    31    18     1    -6   -21 |    -21
                    |                                                                         |
    Date of Ext-Day |    22    02    03    16    02    01    05    31    28    31    29    21 |
               -Year|  2008  2007  2002  1999  2001  2000  1999  2006  1999  2002  2006  1998 |
                    |                                                                         |
Heating Degree Days |  1396  1170   921   618   384   174    12    38   264   623   960  1330 |   7891
Cooling Degree Days |     0     0     0     0     4    24   141    85    10     0     0     0 |    263
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.3   2.2  13.7   9.6   1.1   0.0   0.0   0.0 |   26.9
    Max Temp >= 75  |   0.0   0.0   0.0   1.3   8.6  17.9  30.7  29.4  14.7   1.9   0.0   0.0 |  104.6
    Max Temp <= 32  |  21.2  12.4   2.4   0.0   0.0   0.0   0.0   0.0   0.0   0.3   4.8  17.3 |   58.3
                    |                                                                         |
    Min Temp <= 32  |  30.3  27.3  26.2  18.1   6.7   0.8   0.0   0.1   4.4  19.1  26.6  30.2 |  189.9
    Min Temp <= 20  |  22.9  18.5   7.7   1.6   0.2   0.0   0.0   0.0   0.2   2.8  12.0  21.8 |   87.6
    Min Temp  <= 0  |   5.3   3.6   0.6   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.4   4.1 |   14.0
                    |                                                                         |
Avg Dew Point Temp  |  16.4  19.1  24.9  28.2  35.0  41.7  47.8  43.1  37.3  29.7  24.5  17.6 |   30.4
Avg Wet Bulb Temp   |  19.1  22.4  31.0  37.3  44.4  50.5  57.0  53.8  46.8  37.8  29.4  20.9 |   37.5
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
Avg Sea Level Pres  | 30.28 30.19 30.08 30.00 29.95 29.94 29.95 29.96 30.01 30.10 30.20 30.26 |  30.08
(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   0.8   0.4   2.0   3.8   3.8   4.5   4.5   2.7   0.6   0.3   0.1 |   23.6
    Heavy Fog       |   8.0   5.9   2.6   1.5   0.4   0.1   0.1   0.0   0.5   1.0   2.6   6.3 |   29.1
    Fog             |  23.0  17.9  13.1   9.1   6.5   4.1   2.9   2.9   5.3   7.2  12.2  19.9 |  124.0
    Hail            |   0.0   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.2   0.0   0.1   0.0 |    0.5
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.61  0.58  0.61  1.14  1.28  0.88  0.18  0.46  0.91  0.90  0.63  0.72 |   8.88
                    |                                                                         |
Maximum Daily       |  0.53  0.32  0.47  1.10  0.72  1.34  0.34  0.55  1.03  0.70  0.69  0.36 |   1.34
                    |                                                                         |
    Date of Ext-Day |    02    19    23    18    21    10    26    30    21    06    02    24 |
               -Year|  2006  2005  2005  2000  2002  2004  2007  1999  2006  2007  2008  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.7   7.5   7.5   8.9   9.3   6.0   3.2   5.0   6.2   6.7   7.0   9.9 |   87.0
    >= 0.10         |   2.2   2.1   2.4   3.5   3.9   2.4   0.5   1.6   2.5   3.1   2.0   2.8 |   28.9
    >= 0.25         |   0.2   0.3   0.5   1.6   1.7   1.1   0.3   0.5   0.8   1.1   0.5   0.6 |    9.3
    >= 0.50         |   0.1   0.0   0.0   0.4   0.5   0.4   0.0   0.1   0.6   0.2   0.1   0.0 |    2.4
    >= 1.00         |   0.0   0.0   0.0   0.1   0.0   0.1   0.0   0.0   0.2   0.0   0.0   0.0 |    0.4
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   7.7   8.1   9.7  10.0  10.2   9.7   8.1   8.0   7.6   8.2   8.1   7.9 |    8.6
Daily Avg Max 2-Min |  17.1  17.5  21.0  22.8  23.5  22.5  20.2  20.8  19.0  19.1  17.6  17.4 |   19.9
Daily Avg Peak Gust |  19.8  20.7  25.3  28.2  29.3  27.7  25.1  25.7  23.4  23.1  21.4  20.5 |   24.2
                    |                                                                         |
Maximum Daily Avg   |  26.1  23.1  24.7  23.2  23.2  22.5  20.4  20.4  21.3  22.8  22.3  25.2 |   26.1
                    |                                                                         |
Maximum 2-Minute Avg|    44    48    41    51    43    45    43    43    48    43    39    46 |     51
                    |                                                                         |
Date of Max 2min-Day|    28    14    06    23    03    26    15    22    13    01    11    15 |
               -Year|  2008  2000  2003  2002  2004  2002  2001  2003  2004  2000  2003  2000 |
                    |                                                                         |
Maximum Peak Gust   |    54    60    53    60    54    53    55    52    55    52    51    56 |     60
                    |                                                                         |
Date of Max Gust-Day|    28    14    06    23    20    26    15    22    25    01    11    15 |
               -Year|  2008  2000  2003  2002  2008  2002  2001  2003  1999  2000  2003  2000 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   4.9   5.5  10.9  11.9  14.3  12.0   8.1  10.0   7.4   7.6   6.2   5.8 |  104.4
   Peak Gust >=40   |   1.6   1.2   3.2   3.5   4.0   2.2   1.6   1.8   0.8   1.3   1.5   1.6 |   24.1
   Peak Gust >=50   |   0.5   0.2   0.2   0.5   0.2   0.3   0.1   0.1   0.2   0.1   0.1   0.1 |    2.4
                    |                                                                         |
   Max 2-Minute >=30|   3.0   2.5   4.9   6.1   6.4   4.4   2.5   2.9   2.7   3.3   3.4   0.0 |   42.1
   Max 2-Minute >=40|   0.6   0.3   0.5   0.4   0.8   0.2   0.1   0.1   0.2   0.1   0.0   0.0 |    3.1
                    |                                                                         |
------------------------------------------------------------------------------------------------------

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.