STATION:  THE DALLES MUNICIPAL AIRPORT (KDLS), OR

CLIMATOLOGICAL SUMMARY.  Period of Record: Oct 2000 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        |  42.3  49.8  57.7  64.1  73.2  79.1  88.8  87.4  80.2  65.9  49.8  41.1 |   64.9
Avg Min Temp        |  31.1  31.0  36.4  40.4  48.5  54.4  61.2  59.3  51.3  42.2  34.1  30.8 |   43.4
Avg Temperature     |  36.7  40.4  47.1  52.2  60.8  66.7  75.0  73.3  65.7  54.0  42.0  36.0 |   54.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    61    67    77    87    99   107   108   109   101    88    74    63 |    109
                    |                                                                         |
    Date of Ext-Day |    26    22    30    25    22    29    21    16    03    01    12    04 |
               -Year|  2003  2002  2003  2001  2001  2008  2006  2008  2003  2001  2008  2007 |
                    |                                                                         |
    Extreme Min Temp|     5    11    23    23    32    41    49    44    36    15    14     6 |      5
                    |                                                                         |
    Date of Ext-Day |    04    18    02    03    08    06    02    31    23    31    02    21 |
               -Year|  2004  2006  2002  2007  2002  2005  2003  2006  2008  2002  2002  2008 |
                    |                                                                         |
Heating Degree Days |   879   695   555   384   163    51     0     2    53   342   691   900 |   4715
Cooling Degree Days |     0     0     0     1    34   103   309   259    73     2     0     0 |    782
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   2.4   5.4  14.5  14.0   4.1   0.0   0.0   0.0 |   40.4
    Max Temp >= 75  |   0.0   0.0   0.5   3.0  12.8  19.0  29.5  28.6  22.0   3.9   0.0   0.0 |  119.2
    Max Temp <= 32  |   2.8   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   3.7 |    6.8
                    |                                                                         |
    Min Temp <= 32  |  15.6  16.9   7.9   3.1   0.2   0.0   0.0   0.0   0.0   3.0  11.6  16.9 |   75.2
    Min Temp <= 20  |   2.7   1.4   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.3   0.9   2.3 |    7.6
    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  |  31.6  31.5  35.8  36.9  42.4  46.3  50.9  50.4  45.0  41.1  35.1  31.2 |   39.9
Avg Wet Bulb Temp   |  34.6  36.2  41.9  44.8  51.4  55.7  61.2  60.2  54.6  47.5  38.9  34.1 |   46.7
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.21 30.17 30.10 30.02 30.01 29.98 29.94 29.94 29.98 30.08 30.20 30.20 |  30.07
(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   0.4   0.2   0.5   1.4   0.8   1.3   0.9   0.6   0.1   0.1   0.0 |    6.2
    Heavy Fog       |   3.6   1.8   0.5   0.0   0.0   0.0   0.0   0.0   0.1   0.1   2.2   1.9 |   10.2
    Fog             |  18.2  11.4   5.9   2.5   1.6   1.1   0.3   0.9   0.8   4.5  12.4  16.2 |   75.8
    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     |  2.29  1.05  1.12  0.69  0.61  0.48  0.11  0.28  0.25  0.77  1.95  3.02 |  12.61
                    |                                                                         |
Maximum Daily       |  0.79  0.60  0.57  0.47  0.57  0.77  0.32  0.56  0.56  0.62  0.85  1.65 |   1.65
                    |                                                                         |
    Date of Ext-Day |    03    02    07    25    15    08    07    22    30    31    28    30 |
               -Year|  2007  2004  2003  2003  2005  2004  2002  2004  2007  2005  2001  2005 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  14.8   8.5   9.4   7.8   5.9   3.8   1.5   2.4   2.0   8.7  12.3  16.4 |   93.4
    >= 0.10         |   7.0   4.1   3.9   2.6   2.2   1.9   0.4   1.0   0.8   2.4   6.4   8.8 |   41.5
    >= 0.25         |   2.9   1.2   1.2   0.6   0.6   0.4   0.1   0.4   0.2   0.6   2.7   4.0 |   15.0
    >= 0.50         |   1.4   0.2   0.5   0.0   0.1   0.1   0.0   0.1   0.1   0.2   0.4   1.3 |    4.6
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    0.1
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.1   4.9   7.8   9.2  10.8  12.4  13.0  11.0   8.6   6.2   3.9   4.2 |    8.0
Daily Avg Max 2-Min |  14.9  16.4  21.8  22.6  23.7  25.0  25.5  23.5  21.2  18.4  14.5  14.2 |   20.1
Daily Avg Peak Gust |  17.9  19.7  26.5  27.4  29.3  30.9  31.8  29.3  26.6  22.8  17.7  17.2 |   24.8
                    |                                                                         |
Maximum Daily Avg   |  14.9  15.7  21.1  20.8  24.0  22.7  21.9  22.0  20.8  19.0  16.8  18.2 |   24.0
                    |                                                                         |
Maximum 2-Minute Avg|    41    37    43    46    41    40    38    35    41    39    40    46 |     46
                    |                                                                         |
Date of Max 2min-Day|    12    21    05    27    02    09    12    18    21    12    11    28 |
               -Year|  2002  2003  2003  2004  2002  2008  2001  2001  2006  2001  2003  2008 |
                    |                                                                         |
Maximum Peak Gust   |    51    48    56    58    48    52    49    46    55    47    58    63 |     63
                    |                                                                         |
Date of Max Gust-Day|    06    04    05    27    02    09    26    15    21    12    11    15 |
               -Year|  2007  2006  2003  2004  2002  2008  2008  2003  2006  2001  2003  2006 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   3.7   5.4  12.6  12.1  16.1  18.3  20.7  16.6  12.6   8.7   4.3   3.5 |  134.6
   Peak Gust >=40   |   1.4   1.0   2.8   1.5   3.5   3.5   3.3   3.0   1.4   1.5   0.8   1.0 |   24.7
   Peak Gust >=50   |   0.3   0.0   0.2   0.2   0.0   0.3   0.0   0.0   0.1   0.0   0.1   0.5 |    1.7
                    |                                                                         |
   Max 2-Minute >=30|   1.4   1.3   5.1   4.2   6.4   8.2   6.9   6.0   3.5   2.7   1.6   0.0 |   47.4
   Max 2-Minute >=40|   0.3   0.0   0.4   0.4   0.1   0.1   0.0   0.0   0.1   0.0   0.1   0.0 |    1.5
                    |                                                                         |
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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.