STATION:  ELLENSBURG BOWERS FIELD AIRPORT (KELN), WA

CLIMATOLOGICAL SUMMARY.  Period of Record: Aug 1998 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        |  35.4  43.5  53.3  60.7  69.0  76.2  86.1  85.0  76.7  61.7  45.8  35.3 |   60.7
Avg Min Temp        |  23.3  25.5  30.4  34.6  42.9  49.5  55.9  54.3  45.4  35.4  27.7  22.8 |   37.3
Avg Temperature     |  29.4  34.5  41.9  47.6  55.9  62.9  71.0  69.7  61.0  48.6  36.7  29.0 |   49.0
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    55    64    75    84    99   106   107   106    99    86    67    57 |    107
                    |                                                                         |
    Date of Ext-Day |    30    28    11    26    17    30    05    17    04    01    03    02 |
               -Year|  2005  2008  2005  2005  2006  2008  2007  2008  2006  2008  2007  2008 |
                    |                                                                         |
    Extreme Min Temp|   -14     5     6    18    25    34    39    36    26     8     4    -6 |    -14
                    |                                                                         |
    Date of Ext-Day |    04    18    08    03    10    06    05    28    23    30    30    19 |
               -Year|  2004  2006  2002  2007  1999  1999  1999  2000  2000  2002  2006  2008 |
                    |                                                                         |
Heating Degree Days |  1105   862   717   521   295   123    21    24   153   510   848  1115 |   6294
Cooling Degree Days |     0     0     0     0    14    59   206   169    33     0     0     0 |    481
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   1.1   3.8  12.2  10.3   2.7   0.0   0.0   0.0 |   30.0
    Max Temp >= 75  |   0.0   0.0   0.1   2.0   7.8  15.4  27.8  26.8  17.5   2.1   0.0   0.0 |   99.5
    Max Temp <= 32  |   9.0   1.8   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   1.7  10.4 |   22.9
                    |                                                                         |
    Min Temp <= 32  |  27.9  23.9  19.6  11.2   2.7   0.0   0.0   0.0   1.0  11.8  21.5  27.3 |  146.9
    Min Temp <= 20  |   8.8   6.6   1.3   0.4   0.0   0.0   0.0   0.0   0.0   1.1   5.5  10.8 |   34.5
    Min Temp  <= 0  |   0.5   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.7 |    1.2
                    |                                                                         |
Avg Dew Point Temp  |  24.9  26.4  29.8  32.5  38.7  43.7  47.3  47.6  42.0  36.1  30.1  24.6 |   35.3
Avg Wet Bulb Temp   |  28.0  31.1  36.6  40.9  47.4  52.4  57.5  57.0  50.9  42.4  33.9  27.7 |   42.1
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.16 30.13 30.07 30.00 30.00 29.96 29.94 29.94 29.98 30.08 30.16 30.18 |  30.05
(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   0.1   0.5   1.4   1.0   0.8   0.7   0.4   0.0   0.0   0.0 |    4.9
    Heavy Fog       |  12.6   6.0   2.0   0.3   0.1   0.0   0.0   0.0   0.1   1.3   5.3   9.5 |   37.2
    Fog             |  20.9  12.7   7.0   3.4   2.1   1.0   0.3   0.9   0.9   4.8  14.8  19.8 |   88.6
    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     |  1.28  0.78  0.53  0.60  0.75  0.36  0.11  0.22  0.25  0.48  1.20  1.54 |   8.10
                    |                                                                         |
Maximum Daily       |  0.50  0.65  0.55  0.41  1.34  0.38  0.31  0.53  0.53  0.49  0.72  1.03 |   1.34
                    |                                                                         |
    Date of Ext-Day |    22    25    25    28    09    08    19    06    03    03    28    14 |
               -Year|  2003  2004  2004  2001  2005  2001  2004  2004  2000  2008  2001  2006 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  12.7   9.3   8.3   7.2   7.4   4.6   1.7   2.2   2.1   6.8  11.2  13.7 |   87.2
    >= 0.10         |   4.4   2.5   1.7   1.8   2.5   1.6   0.4   0.7   0.6   1.4   3.9   4.6 |   26.2
    >= 0.25         |   1.7   0.5   0.3   0.7   0.6   0.4   0.1   0.3   0.4   0.6   1.4   2.0 |    8.9
    >= 0.50         |   0.1   0.1   0.1   0.0   0.2   0.0   0.0   0.1   0.2   0.0   0.4   0.3 |    1.4
    >= 1.00         |   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.1 |    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|   4.2   5.5   9.4  11.0  12.6  14.1  14.4  12.6  10.0   7.6   4.8   4.2 |    9.2
Daily Avg Max 2-Min |  13.3  16.1  22.8  24.7  26.1  26.9  27.5  25.3  22.3  19.6  14.9  13.5 |   21.1
Daily Avg Peak Gust |  15.7  18.7  26.9  29.3  31.1  32.0  32.9  30.5  26.6  23.5  17.5  16.2 |   25.1
                    |                                                                         |
Maximum Daily Avg   |  27.2  27.7  24.9  27.2  29.1  30.1  29.0  28.9  27.2  22.8  17.7  21.0 |   30.1
                    |                                                                         |
Maximum 2-Minute Avg|    46    46    44    51    44    44    43    41    40    45    47    62 |     62
                    |                                                                         |
Date of Max 2min-Day|    12    21    09    27    19    11    22    18    05    16    19    08 |
               -Year|  2005  2006  2004  2004  2001  2008  2000  2001  2001  2001  2003  2008 |
                    |                                                                         |
Maximum Peak Gust   |    54    52    51    56    52    52    53    51    48    61    60    84 |     84
                    |                                                                         |
Date of Max Gust-Day|    07    21    09    27    28    11    22    18    16    25    19    28 |
               -Year|  2007  2006  2004  2004  2001  2008  2000  2001  2007  2008  2003  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   4.0   5.7  13.2  14.4  18.3  19.4  21.2  18.5  12.3  10.7   5.0   4.0 |  146.7
   Peak Gust >=40   |   1.3   1.3   3.2   4.0   5.8   6.4   6.5   3.9   3.1   2.2   0.9   1.5 |   40.2
   Peak Gust >=50   |   0.2   0.2   0.2   0.4   0.4   0.2   0.1   0.1   0.0   0.5   0.2   0.3 |    2.7
                    |                                                                         |
   Max 2-Minute >=30|   2.6   2.8   8.6   9.1  11.5  12.2  13.8  10.6   7.5   6.0   2.8   0.0 |   87.5
   Max 2-Minute >=40|   0.4   0.4   0.5   0.6   0.9   0.6   0.4   0.2   0.3   0.6   0.3   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.