STATION:  EPHRATA MUNICIPAL AIRPORT (KEPH), WA

CLIMATOLOGICAL SUMMARY.  Period of Record: Sep 2001 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        |  35.3  44.1  54.8  62.6  72.7  80.7  90.8  87.3  78.2  63.0  46.0  35.7 |   62.6
Avg Min Temp        |  23.2  26.5  31.5  36.8  46.9  54.3  61.8  58.8  50.4  39.0  29.4  23.6 |   40.2
Avg Temperature     |  29.2  35.3  43.2  49.7  59.8  67.5  76.3  73.1  64.3  51.0  37.7  29.7 |   51.4
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    56    62    72    81    96   103   107   106    99    85    69    60 |    107
                    |                                                                         |
    Date of Ext-Day |    26    27    11    26    16    29    13    17    04    01    04    04 |
               -Year|  2003  2005  2007  2005  2006  2008  2002  2008  2006  2003  2007  2007 |
                    |                                                                         |
    Extreme Min Temp|   -11     6    19    21    28    40    46    44    32     8     8     1 |    -11
                    |                                                                         |
    Date of Ext-Day |    05    18    02    19    08    01    11    31    29    31    22    20 |
               -Year|  2004  2006  2002  2008  2002  2004  2008  2006  2007  2002  2003  2008 |
                    |                                                                         |
Heating Degree Days |  1108   839   677   459   195    51     1     6    93   436   820  1095 |   5780
Cooling Degree Days |     0     0     0     0    34   125   349   256    73     2     0     0 |    838
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   1.3   6.0  17.9  12.2   2.8   0.0   0.0   0.0 |   40.1
    Max Temp >= 75  |   0.0   0.0   0.0   1.9  11.7  22.1  31.0  29.6  19.9   2.6   0.0   0.0 |  118.7
    Max Temp <= 32  |  10.8   0.7   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   2.0   9.9 |   23.5
                    |                                                                         |
    Min Temp <= 32  |  26.4  24.0  18.4   7.7   0.6   0.0   0.0   0.0   0.3   5.5  19.9  27.6 |  130.5
    Min Temp <= 20  |   9.0   4.1   0.4   0.0   0.0   0.0   0.0   0.0   0.0   0.6   3.5   9.5 |   27.2
    Min Temp  <= 0  |   1.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    1.0
                    |                                                                         |
Avg Dew Point Temp  |  24.8  26.4  29.5  32.0  37.2  41.3  43.3  43.4  38.7  34.9  30.1  25.1 |   33.9
Avg Wet Bulb Temp   |  28.0  32.0  37.6  42.4  49.2  54.2  58.8  57.4  51.5  43.5  34.6  28.3 |   43.1
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.17 30.15 30.08 29.99 29.95 29.92 29.89 29.89 29.95 30.06 30.19 30.18 |  30.04
(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   0.4   0.4   1.9   0.7   1.1   1.0   0.6   0.0   0.0   0.0 |    6.2
    Heavy Fog       |   7.7   3.0   1.4   0.3   0.0   0.0   0.0   0.0   0.1   0.8   3.4   6.4 |   23.0
    Fog             |  17.3   8.8   5.1   2.7   2.6   1.9   0.1   0.9   1.0   3.9  11.8  15.4 |   71.4
    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     |  0.98  0.50  0.38  0.45  0.55  0.55  0.12  0.22  0.23  0.53  0.85  1.23 |   6.60
                    |                                                                         |
Maximum Daily       |  0.49  0.61  0.35  0.58  0.80  0.48  0.28  0.41  0.28  0.92  0.64  0.50 |   0.92
                    |                                                                         |
    Date of Ext-Day |    22    28    25    08    09    05    19    05    15    17    28    30 |
               -Year|  2003  2006  2004  2006  2005  2005  2004  2004  2006  2004  2001  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.3   4.9   4.7   5.6   6.9   3.9   1.4   2.6   2.4   5.5   7.2  12.1 |   66.4
    >= 0.10         |   3.9   1.3   1.3   1.9   2.3   1.9   0.4   0.9   0.9   1.2   3.1   4.9 |   23.8
    >= 0.25         |   1.1   0.7   0.3   0.4   0.1   1.0   0.1   0.1   0.2   0.5   1.1   1.2 |    7.1
    >= 0.50         |   0.0   0.1   0.0   0.1   0.1   0.0   0.0   0.0   0.0   0.1   0.1   0.1 |    0.8
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.0
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   6.5   7.3   8.3   8.4   8.7   9.0   9.2   8.2   7.8   7.2   6.5   6.4 |    7.8
Daily Avg Max 2-Min |  15.2  16.2  20.0  20.0  20.3  20.6  20.8  19.6  18.7  17.4  15.5  15.1 |   18.3
Daily Avg Peak Gust |  17.9  19.4  24.6  24.8  25.5  26.1  26.2  24.5  22.9  21.1  18.6  17.9 |   22.5
                    |                                                                         |
Maximum Daily Avg   |  19.5  17.7  18.5  17.9  20.1  16.2  18.4  14.6  17.3  16.1  19.9  18.7 |   20.1
                    |                                                                         |
Maximum 2-Minute Avg|    38    36    48    45    40    36    38    33    36    41    41    44 |     48
                    |                                                                         |
Date of Max 2min-Day|    06    23    05    28    18    18    30    14    07    19    19    15 |
               -Year|  2007  2006  2004  2004  2006  2002  2002  2002  2001  2006  2003  2006 |
                    |                                                                         |
Maximum Peak Gust   |    47    44    58    53    55    43    47    44    41    55    49    54 |     58
                    |                                                                         |
Date of Max Gust-Day|    06    07    05    27    18    09    10    16    20    19    19    15 |
               -Year|  2007  2008  2004  2004  2006  2008  2008  2002  2007  2006  2003  2006 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   3.1   4.3   8.9   7.5   7.2   8.3   9.2   6.7   5.6   4.8   3.8   3.4 |   72.8
   Peak Gust >=40   |   0.9   0.9   1.3   1.1   1.0   0.4   0.7   0.1   0.4   0.6   0.4   0.3 |    8.1
   Peak Gust >=50   |   0.0   0.0   0.1   0.3   0.1   0.0   0.0   0.0   0.0   0.1   0.0   0.1 |    0.8
                    |                                                                         |
   Max 2-Minute >=30|   1.3   1.1   2.9   2.2   1.4   1.3   1.2   1.7   1.0   1.8   1.1   0.0 |   16.9
   Max 2-Minute >=40|   0.0   0.0   0.3   0.4   0.1   0.0   0.0   0.0   0.0   0.1   0.3   0.0 |    1.2
                    |                                                                         |
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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.