STATION:  VANCOUVER PEARSON FIELD AIRPORT (KVUO), WA

CLIMATOLOGICAL SUMMARY.  Period of Record: Sep 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        |  46.6  51.3  55.4  60.7  67.4  72.9  80.5  80.8  75.7  63.2  53.2  46.6 |   62.9
Avg Min Temp        |  34.9  34.7  38.3  41.6  47.8  52.6  56.9  56.7  50.6  44.7  39.3  35.0 |   44.4
Avg Temperature     |  40.8  43.0  46.8  51.1  57.6  62.7  68.7  68.8  63.2  54.0  46.2  40.8 |   53.6
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    66    65    76    89    96   101   104   102    95    81    70    63 |    104
                    |                                                                         |
    Date of Ext-Day |    18    23    11    30    16    26    21    14    04    16    13    04 |
               -Year|  2005  2005  2005  1998  2008  2006  2006  2008  2003  2002  1999  2007 |
                    |                                                                         |
    Extreme Min Temp|    16    15    24    26    33    39    46    45    36    24    20     5 |      5
                    |                                                                         |
    Date of Ext-Day |    14    19    02    01    08    02    31    28    24    31    18    22 |
               -Year|  2007  2006  2002  2008  2002  1999  2002  2000  2000  2006  2000  1998 |
                    |                                                                         |
Heating Degree Days |   752   623   563   417   244   108    17    15    95   344   563   751 |   4491
Cooling Degree Days |     0     0     0     1    14    40   133   132    40     1     0     0 |    361
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.8   1.8   4.0   4.1   1.6   0.0   0.0   0.0 |   12.3
    Max Temp >= 75  |   0.0   0.0   0.2   2.1   6.9  10.3  23.9  23.8  15.9   2.5   0.0   0.0 |   85.7
    Max Temp <= 32  |   0.6   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.8 |    1.4
                    |                                                                         |
    Min Temp <= 32  |  10.7  10.4   5.1   1.8   0.0   0.0   0.0   0.0   0.0   0.5   6.1  10.5 |   45.2
    Min Temp <= 20  |   0.7   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   0.5 |    1.7
    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  |  35.4  35.1  38.5  40.7  45.1  49.4  53.4  53.6  50.2  45.6  40.2  35.4 |   43.6
Avg Wet Bulb Temp   |  38.6  39.8  43.1  46.1  51.1  55.3  59.6  59.7  55.9  49.8  42.7  38.7 |   48.4
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.12 30.14 30.10 30.06 30.06 30.04 30.03 30.01 30.02 30.11 30.12 30.21 |  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   0.4   0.8   0.9   0.7   0.4   0.4   0.8   0.5   0.3   0.1 |    5.3
    Heavy Fog       |   3.9   2.8   1.7   0.3   0.2   0.2   0.0   0.0   0.9   4.3   4.9   3.0 |   22.0
    Fog             |  21.7  16.8  14.8  10.6   9.6   7.0   3.0   3.8   7.5  18.5  20.6  20.5 |  154.4
    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     |  6.07  3.48  3.77  2.54  2.35  1.53  0.35  0.72  1.07  2.92  5.96  6.46 |  37.22
                    |                                                                         |
Maximum Daily       |  2.15  1.34  1.38  0.78  1.01  1.02  0.31  0.84  1.67  1.24  2.90  2.06 |   2.90
                    |                                                                         |
    Date of Ext-Day |    31    27    26    12    24    28    28    22    30    30    06    27 |
               -Year|  2003  1999  2005  2003  1998  2002  2001  2004  2005  1997  2006  1998 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  21.1  16.2  19.3  16.2  13.9   9.2   3.7   3.9   6.5  15.7  19.7  20.5 |  165.8
    >= 0.10         |  14.1   9.9  10.7   8.9   8.0   4.2   1.4   2.0   2.8   7.4  12.1  14.9 |   96.5
    >= 0.25         |   8.9   4.9   4.9   3.1   3.0   2.2   0.3   0.9   1.5   4.3   7.7   9.1 |   50.9
    >= 0.50         |   4.0   1.9   1.8   0.9   1.1   0.7   0.0   0.5   0.6   1.5   4.1   3.7 |   20.8
    >= 1.00         |   0.8   0.3   0.3   0.0   0.1   0.1   0.0   0.0   0.1   0.4   1.1   0.9 |    4.0
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   5.4   5.2   4.9   4.6   4.6   5.0   5.3   4.9   4.1   4.0   4.6   5.5 |    4.8
Daily Avg Max 2-Min |  14.6  14.7  14.3  13.8  13.2  13.5  13.4  13.1  12.6  12.3  13.4  14.9 |   13.6
Daily Avg Peak Gust |  19.1  19.3  18.8  18.2  17.6  17.9  18.0  17.5  16.7  16.3  17.8  19.6 |   18.1
                    |                                                                         |
Maximum Daily Avg   |  15.1  20.2  12.9  14.3  10.1   9.4   8.9  10.2  11.9  14.9  16.1  18.5 |   20.2
                    |                                                                         |
Maximum 2-Minute Avg|    36    31    34    29    34    24    20    20    24    29    33    33 |     36
                    |                                                                         |
Date of Max 2min-Day|    16    06    03    22    01    18    12    17    18    27    23    04 |
               -Year|  2000  1999  1999  2005  1998  2004  2003  2002  1998  1999  1998  2003 |
                    |                                                                         |
Maximum Peak Gust   |    46    46    52    38    53    33    28    28    36    44    47    49 |     53
                    |                                                                         |
Date of Max Gust-Day|    16    06    02    15    01    19    07    26    18    27    15    14 |
               -Year|  2000  1999  1999  1999  1998  2004  2008  1997  1998  1999  2006  2006 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   4.0   3.4   2.4   1.1   0.3   0.3   0.0   0.0   0.5   1.6   2.3   3.7 |   19.5
   Peak Gust >=40   |   0.2   0.6   0.2   0.0   0.1   0.0   0.0   0.0   0.0   0.1   0.3   0.5 |    2.0
   Peak Gust >=50   |   0.0   0.0   0.1   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.2
                    |                                                                         |
   Max 2-Minute >=30|   0.1   0.5   0.2   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.1   0.0 |    0.9
   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.