STATION:  THERMAL-DESERT RESORTS RGNL ARPT (KTRM), CA

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        |  71.4  73.6  81.8  86.0  96.0 103.4 107.7 106.3 101.9  91.0  79.5  70.1 |   89.1
Avg Min Temp        |  38.0  41.1  47.7  53.1  62.6  68.2  75.4  74.2  67.2  55.8  44.8  36.3 |   55.4
Avg Temperature     |  54.7  57.3  64.8  69.6  79.3  85.8  91.6  90.3  84.5  73.4  62.1  53.2 |   72.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    94    89   103   106   114   120   123   120   117   108    96    90 |    123
                    |                                                                         |
    Date of Ext-Day |    31    04    21    26    21    14    27    03    01    12    12    23 |
               -Year|  2003  2001  2004  2000  2000  2000  1998  1998  2007  1999  1999  2001 |
                    |                                                                         |
    Extreme Min Temp|    17    23    24    32    42    51    60    52    50    39    25    18 |     17
                    |                                                                         |
    Date of Ext-Day |    17    06    04    10    01    03    04    31    30    17    30    23 |
               -Year|  2007  2003  2002  1999  1999  1999  1997  1999  1999  1998  2006  1998 |
                    |                                                                         |
Heating Degree Days |   322   220    88    29     1     0     0     0     0     6   126   367 |   1157
Cooling Degree Days |     3     3    82   166   444   625   823   784   586   266    40     1 |   3824
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.1   0.0   6.9  10.5  25.1  29.1  31.0  31.0  29.0  20.0   3.0   0.1 |  185.6
    Max Temp >= 75  |  10.3  13.0  23.9  27.0  31.0  30.0  31.0  31.0  30.0  30.2  22.1   7.7 |  287.1
    Max Temp <= 32  |   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
                    |                                                                         |
    Min Temp <= 32  |   6.4   3.6   0.7   0.1   0.0   0.0   0.0   0.0   0.0   0.0   1.6   9.4 |   21.8
    Min Temp <= 20  |   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    0.3
    Min Temp  <= 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 |    0.0
                    |                                                                         |
Avg Dew Point Temp  |  31.7  34.0  36.2  37.9  44.0  48.3  58.1  58.1  50.0  44.8  37.4  32.0 |   42.7
Avg Wet Bulb Temp   |  43.9  46.6  51.2  54.1  60.2  64.7  70.7  70.3  64.5  57.8  49.9  43.1 |   56.4
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.07 30.01 29.93 29.87 29.78 29.75 29.75 29.75 29.76 29.86 29.99 30.07 |  29.88
(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   |   0.2   0.4   0.2   0.1   0.3   0.1   1.2   2.5   1.3   0.4   0.3   0.2 |    7.2
    Heavy Fog       |   0.3   0.4   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    0.8
    Fog             |   2.7   2.8   1.1   0.6   0.2   0.0   0.1   0.4   0.0   1.1   1.1   1.6 |   11.6
    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     |  0.38  0.69  0.13  0.06  0.01  0.01  0.14  0.09  0.17  0.27  0.31  0.25 |   2.52
                    |                                                                         |
Maximum Daily       |  1.09  1.06  0.47  0.23  0.04  0.14  1.43  0.38  0.69  1.70  0.99  1.33 |   1.70
                    |                                                                         |
    Date of Ext-Day |    27    11    05    03    23    06    22    13    11    17    21    17 |
               -Year|  2008  2005  2000  2004  2008  1997  1997  1998  2004  2005  2004  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   2.4   3.5   0.9   0.9   0.4   0.1   0.4   0.8   0.8   1.0   1.2   1.3 |   13.8
    >= 0.10         |   1.0   1.7   0.5   0.3   0.0   0.1   0.2   0.2   0.5   0.4   0.5   0.5 |    5.9
    >= 0.25         |   0.4   1.2   0.2   0.0   0.0   0.0   0.2   0.1   0.3   0.3   0.3   0.3 |    3.2
    >= 0.50         |   0.2   0.3   0.0   0.0   0.0   0.0   0.1   0.0   0.1   0.2   0.3   0.2 |    1.3
    >= 1.00         |   0.1   0.1   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.1   0.0   0.1 |    0.4
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   5.0   5.6   7.2   9.1   9.1   8.4   7.1   6.4   6.6   6.0   5.0   4.4 |    6.7
Daily Avg Max 2-Min |  13.4  15.0  17.9  20.7  20.4  19.2  17.7  16.7  16.4  15.3  13.2  12.6 |   16.5
Daily Avg Peak Gust |  16.9  19.2  22.6  26.2  25.7  24.2  22.4  21.2  20.8  19.4  16.7  15.9 |   20.9
                    |                                                                         |
Maximum Daily Avg   |  17.9  15.7  18.2  22.3  21.8  21.5  15.6  12.2  15.8  17.6  13.6  15.2 |   22.3
                    |                                                                         |
Maximum 2-Minute Avg|    39    39    56    37    36    40    29    43    38    31    37    43 |     56
                    |                                                                         |
Date of Max 2min-Day|    28    27    14    19    20    04    09    20    11    30    25    01 |
               -Year|  2008  2007  2001  2001  2002  2008  2006  2003  2004  2003  2001  2007 |
                    |                                                                         |
Maximum Peak Gust   |    49    54    59    52    46    51    38    47    46    40    51    64 |     64
                    |                                                                         |
Date of Max Gust-Day|    28    27    14    07    20    04    09    20    11    30    08    01 |
               -Year|  2008  2007  2001  2005  2002  2008  2006  2003  2004  2003  2002  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   2.9   3.1   5.6   9.9  10.2   5.8   2.0   1.8   2.5   2.5   1.9   2.7 |   51.0
   Peak Gust >=40   |   0.8   0.8   0.9   1.5   0.8   0.5   0.0   0.4   0.4   0.2   0.4   0.6 |    7.1
   Peak Gust >=50   |   0.0   0.2   0.2   0.1   0.0   0.1   0.0   0.0   0.0   0.0   0.1   0.1 |    1.0
                    |                                                                         |
   Max 2-Minute >=30|   0.8   0.8   1.4   2.5   2.0   0.6   0.0   0.4   0.5   0.3   0.7   0.0 |    9.9
   Max 2-Minute >=40|   0.0   0.0   0.1   0.0   0.0   0.1   0.0   0.1   0.0   0.0   0.0   0.0 |    0.4
                    |                                                                         |
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Observations of WEATHER may me innacurate due to early ASOS inconsistancies.  Average days
with Thunderstorms may be low due to poor 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.