STATION:  TWIN FALLS-MAGIC VLY RGN APT (KTWF), ID

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        |  37.7  41.4  52.1  59.0  69.2  79.0  90.4  87.7  76.8  62.9  48.8  37.7 |   61.9
Avg Min Temp        |  22.3  24.3  30.1  35.0  43.1  50.2  59.2  56.7  47.7  37.2  27.7  21.4 |   37.9
Avg Temperature     |  30.0  32.9  41.1  47.0  56.2  64.6  74.8  72.2  62.3  50.0  38.2  29.6 |   49.9
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    61    60    75    86   100    98   107   101    98    89    76    60 |    107
                    |                                                                         |
    Date of Ext-Day |    31    26    30    27    28    29    23    06    03    01    07    11 |
               -Year|  2003  2006  2004  2000  2003  2008  2003  1998  2007  1997  2006  2004 |
                    |                                                                         |
    Extreme Min Temp|     0    -4    12    19    24    34    26    38    24     4     6    -8 |     -8
                    |                                                                         |
    Date of Ext-Day |    30    13    02    01    08    09    21    31    28    31    30    22 |
               -Year|  2002  2004  2002  2008  2002  1999  2008  1999  1999  2002  2004  1998 |
                    |                                                                         |
Heating Degree Days |  1085   908   740   539   297   102     5    10   140   466   803  1098 |   6193
Cooling Degree Days |     0     0     0     0    23    90   309   233    59     1     0     0 |    716
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   1.0   4.8  18.4  13.2   2.5   0.0   0.0   0.0 |   40.0
    Max Temp >= 75  |   0.0   0.0   0.1   2.4   9.6  19.8  30.5  29.9  18.4   3.9   0.2   0.0 |  114.7
    Max Temp <= 32  |   8.9   4.8   0.5   0.0   0.0   0.0   0.0   0.0   0.0   0.1   1.7  10.0 |   26.0
                    |                                                                         |
    Min Temp <= 32  |  29.1  24.6  21.3  11.5   2.1   0.0   0.2   0.0   0.8   8.2  20.9  26.3 |  145.0
    Min Temp <= 20  |  11.3   8.1   1.8   0.3   0.0   0.0   0.0   0.0   0.0   0.4   6.4  13.5 |   41.8
    Min Temp  <= 0  |   0.1   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.7 |    0.9
                    |                                                                         |
Avg Dew Point Temp  |  23.8  25.3  27.8  31.1  37.0  40.7  44.8  42.5  36.8  30.6  27.2  23.0 |   32.6
Avg Wet Bulb Temp   |  27.6  29.7  35.1  39.6  46.6  51.9  57.8  55.7  49.1  40.8  33.3  27.0 |   41.2
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.15 30.10 30.03 29.96 29.92 29.88 29.86 29.88 29.93 30.03 30.12 30.19 |  30.00
(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   0.2   0.5   1.5   2.9   3.3   3.7   3.8   2.0   0.5   0.2   0.0 |   18.5
    Heavy Fog       |   5.2   2.5   1.8   0.8   0.2   0.1   0.0   0.0   0.1   0.3   1.6   4.2 |   16.8
    Fog             |  17.6  13.5   8.5   7.2   4.9   2.2   0.4   0.8   1.9   3.0   9.4  14.8 |   84.1
    Hail            |   0.0   0.0   0.0   0.1   0.2   0.2   0.0   0.0   0.2   0.0   0.0   0.0 |    0.6
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.92  0.72  0.79  1.33  1.48  0.65  0.28  0.31  0.48  0.71  0.69  1.16 |   9.52
                    |                                                                         |
Maximum Daily       |  0.57  0.48  0.70  0.80  1.03  1.47  0.48  0.44  0.81  0.57  0.46  0.95 |   1.47
                    |                                                                         |
    Date of Ext-Day |    10    14    26    20    29    08    22    11    13    05    02    08 |
               -Year|  2006  2000  2003  2005  2005  2006  2008  1999  2001  2007  2008  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.1   8.3   8.2   9.5   8.4   5.3   2.6   3.2   4.1   6.0   7.2   8.8 |   80.7
    >= 0.10         |   3.5   2.5   2.7   4.3   4.0   2.2   0.8   1.0   1.5   2.6   2.8   3.3 |   31.1
    >= 0.25         |   1.0   0.7   0.7   1.8   1.7   0.5   0.4   0.2   0.5   0.9   0.5   1.4 |   10.6
    >= 0.50         |   0.2   0.0   0.2   0.5   0.8   0.1   0.0   0.0   0.2   0.1   0.0   0.4 |    2.5
    >= 1.00         |   0.0   0.0   0.0   0.0   0.1   0.1   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|  10.0  10.8  11.5  11.5  11.1  10.8   9.6   9.6   9.9  10.5   9.7  10.2 |   10.5
Daily Avg Max 2-Min |  20.7  21.6  23.2  23.5  22.9  21.9  19.7  19.9  19.5  20.5  20.3  21.1 |   21.2
Daily Avg Peak Gust |  24.7  25.7  27.8  28.3  27.9  26.8  24.1  24.5  24.1  24.6  24.1  25.3 |   25.7
                    |                                                                         |
Maximum Daily Avg   |  27.9  25.6  23.9  30.8  25.3  31.2  17.0  17.5  21.7  23.7  30.1  29.0 |   31.2
                    |                                                                         |
Maximum 2-Minute Avg|    52    57    58    53    43    47    41    46    43    45    45    51 |     58
                    |                                                                         |
Date of Max 2min-Day|    04    14    25    27    20    06    30    30    05    28    08    25 |
               -Year|  2008  2000  2006  2004  2001  2007  1998  1999  2001  1999  2002  2008 |
                    |                                                                         |
Maximum Peak Gust   |    70    74    68    60    60    61    56    57    51    56    55    84 |     84
                    |                                                                         |
Date of Max Gust-Day|    04    14    25    27    20    26    06    03    07    28    08    09 |
               -Year|  2008  2000  2006  2004  2008  2002  2007  2000  2001  1999  2002  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   8.8   8.7  12.8  11.5  11.7   8.7   6.1   6.2   6.9   8.5   7.7  10.5 |  107.9
   Peak Gust >=40   |   2.9   2.7   3.1   3.3   2.5   2.5   1.4   1.4   1.6   2.1   2.0   3.9 |   29.5
   Peak Gust >=50   |   0.9   0.5   0.5   0.5   0.3   0.3   0.2   0.3   0.1   0.2   0.3   0.9 |    5.0
                    |                                                                         |
   Max 2-Minute >=30|   4.7   4.4   6.5   5.8   5.0   4.4   1.9   2.5   2.6   3.6   3.9   0.0 |   45.3
   Max 2-Minute >=40|   0.8   0.8   0.5   0.7   0.5   0.4   0.2   0.3   0.1   0.3   0.7   0.0 |    5.1
                    |                                                                         |
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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.