STATION:  STAMPASS PASS FLTWO (KSMP), WA

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        |  31.1  33.8  37.6  44.0  51.2  57.9  67.1  67.4  60.4  48.1  37.4  30.9 |   47.2
Avg Min Temp        |  23.8  25.5  28.1  31.3  37.1  42.4  48.9  49.7  44.9  36.7  29.6  23.6 |   35.1
Avg Temperature     |  27.5  29.6  32.9  37.6  44.2  50.1  58.0  58.6  52.6  42.4  33.5  27.2 |   41.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    58    56    63    71    85    90   102    93    86    73    63    56 |    102
                    |                                                                         |
    Date of Ext-Day |    24    02    11    30    17    26    14    13    03    04    16    01 |
               -Year|  2005  2005  2005  1998  2006  2006  2004  2004  2003  2003  2008  2008 |
                    |                                                                         |
    Extreme Min Temp|    -4     6    16    19    23    30    33    37    30    15    10    -3 |     -4
                    |                                                                         |
    Date of Ext-Day |    05    17    07    01    06    01    30    30    23    30    23    22 |
               -Year|  2004  2006  2002  2008  2002  1999  2006  1999  2000  2002  1996  1998 |
                    |                                                                         |
Heating Degree Days |  1164   999   996   822   647   454   248   232   376   699   944  1171 |   8751
Cooling Degree Days |     0     0     0     0     1     8    31    32     5     0     0     0 |     78
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.0   0.2   0.3   0.3   0.0   0.0   0.0   0.0 |    0.8
    Max Temp >= 75  |   0.0   0.0   0.0   0.0   0.8   2.7   7.6   8.7   2.6   0.0   0.0   0.0 |   22.3
    Max Temp <= 32  |  18.5  12.3   8.8   2.4   0.6   0.0   0.0   0.0   0.0   0.8   7.9  19.6 |   70.8
                    |                                                                         |
    Min Temp <= 32  |  28.6  26.7  25.6  20.1   8.2   1.4   0.0   0.0   0.6   8.4  21.9  29.2 |  170.8
    Min Temp <= 20  |   8.2   3.8   1.4   0.1   0.0   0.0   0.0   0.0   0.0   0.5   2.9   7.8 |   24.6
    Min Temp  <= 0  |   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.3 |    0.6
                    |                                                                         |
Avg Dew Point Temp  |  24.7  25.0  27.8  30.2  35.8  41.1  46.9  46.9  41.7  34.9  28.9  24.0 |   34.0
Avg Wet Bulb Temp   |  26.4  27.7  30.5  34.0  39.8  45.1  51.4  51.5  46.6  38.8  31.6  25.9 |   37.4
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.11 30.12 30.08 30.04 30.05 30.05 30.07 30.05 30.04 30.10 30.13 30.17 |  30.08
(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   0.0   0.0   0.0   0.0   0.3   0.1   0.1   0.0   0.0   0.0   0.0 |    0.5
    Heavy Fog       |  25.1  18.7  23.4  20.6  20.2  20.6  15.7  15.7  14.6  17.8  18.9  22.7 |  234.0
    Fog             |  26.5  20.7  25.1  22.6  21.2  21.2  17.7  17.7  15.9  19.5  20.4  24.3 |  252.7
    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     | 12.19  6.21  7.88  4.14  3.84  3.33  1.07  1.80  3.55  7.61 13.13 13.36 |  78.10
                    |                                                                         |
Maximum Daily       |  7.81  2.60  2.39  1.59  1.15  1.09  0.85  2.61  3.64  2.89  8.22  3.82 |   8.22
                    |                                                                         |
    Date of Ext-Day |    07    21    26    13    01    12    08    24    29    30    06    29 |
               -Year|  2007  2003  2005  2002  2001  2000  2005  2004  2005  1997  2006  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  19.9  15.5  21.1  19.2  18.7  16.9  11.1  11.7  12.2  18.3  20.7  22.4 |  207.8
    >= 0.10         |  14.8  10.9  15.0  11.0  10.4   8.7   2.7   4.0   6.8  12.9  16.3  17.9 |  131.5
    >= 0.25         |  10.8   7.1   9.9   6.0   5.9   4.8   1.3   2.2   4.4   9.4  11.5  13.0 |   86.2
    >= 0.50         |   7.8   3.8   4.8   2.2   2.2   2.1   0.4   1.0   2.3   5.1   8.3   8.7 |   48.6
    >= 1.00         |   3.7   1.5   1.8   0.4   0.3   0.3   0.0   0.3   0.7   1.9   4.2   4.3 |   19.7
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   6.6   7.1   6.7   6.6   6.9   7.2   7.4   7.1   6.8   6.5   6.5   6.7 |    6.8
Daily Avg Max 2-Min |  14.6  14.9  14.6  13.1  13.9  14.0  13.3  13.1  13.1  14.1  14.4  14.9 |   14.0
Daily Avg Peak Gust |  23.6  23.7  23.0  20.2  20.7  20.9  19.8  19.4  19.7  22.0  23.1  23.7 |   21.6
                    |                                                                         |
Maximum Daily Avg   |  17.3  15.5  16.2  16.1  14.5  14.8  13.1  12.2  16.1  18.2  18.9  18.4 |   18.9
                    |                                                                         |
Maximum 2-Minute Avg|    30    37    29    32    30    25    24    26    36    33    30    37 |     37
                    |                                                                         |
Date of Max 2min-Day|    09    02    14    14    02    15    13    04    25    28    20    14 |
               -Year|  2000  1999  2000  2002  2002  1998  2007  1996  1999  2003  1998  2000 |
                    |                                                                         |
Maximum Peak Gust   |    54    56    53    53    44    39    44    41    51    52    48    52 |     56
                    |                                                                         |
Date of Max Gust-Day|    06    01    08    14    02    09    13    27    25    31    24    15 |
               -Year|  2007  2006  2006  2002  2002  2008  2007  2008  1999  1999  2004  2006 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   7.2   6.1   5.8   2.6   2.5   1.5   0.2   0.6   1.5   4.1   6.2   7.0 |   45.2
   Peak Gust >=40   |   1.3   1.0   0.8   0.3   0.2   0.0   0.1   0.1   0.2   0.8   1.2   1.7 |    7.6
   Peak Gust >=50   |   0.2   0.4   0.1   0.1   0.0   0.0   0.0   0.0   0.1   0.2   0.0   0.4 |    1.4
                    |                                                                         |
   Max 2-Minute >=30|   0.1   0.3   0.0   0.2   0.1   0.0   0.0   0.0   0.1   0.3   0.3   0.0 |    1.3
   Max 2-Minute >=40|   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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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.