STATION:  VERNAL AIRPORT (KVEL), UT

CLIMATOLOGICAL SUMMARY.  Period of Record: Feb 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        |  29.8  38.3  52.8  62.1  73.0  82.5  91.1  86.6  75.7  62.5  46.4  31.1 |   61.0
Avg Min Temp        |   9.1  17.0  25.0  32.3  40.7  48.3  56.9  54.4  44.3  33.9  22.6  10.4 |   32.9
Avg Temperature     |  19.4  27.7  38.9  47.2  56.8  65.4  74.0  70.5  60.0  48.2  34.5  20.8 |   46.9
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    52    60    78    83    96    98   101    97    92    81    67    57 |    101
                    |                                                                         |
    Date of Ext-Day |    11    27    22    29    31    30    13    01    02    09    01    02 |
               -Year|  2000  2006  2004  2007  2002  2002  2002  2000  2007  2003  2008  2008 |
                    |                                                                         |
    Extreme Min Temp|   -21    -9     3    17    21    30    43    40    26    17    -2   -21 |    -21
                    |                                                                         |
    Date of Ext-Day |    15    12    02    04    11    13    05    31    29    17    23    23 |
               -Year|  2007  2004  2002  2003  1999  2001  2000  2005  1999  1999  2003  1998 |
                    |                                                                         |
Heating Degree Days |  1410  1055   809   535   267    77     0     6   170   521   915  1369 |   7134
Cooling Degree Days |     0     0     0     0    14    88   279   175    20     0     0     0 |    577
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.0   0.7   7.3  20.1   9.1   0.5   0.0   0.0   0.0 |   37.7
    Max Temp >= 75  |   0.0   0.0   0.5   1.9  15.5  24.4  31.0  30.4  18.2   3.2   0.0   0.0 |  125.0
    Max Temp <= 32  |  17.9   6.2   0.5   0.0   0.0   0.0   0.0   0.0   0.0   0.0   3.0  16.8 |   44.5
                    |                                                                         |
    Min Temp <= 32  |  31.0  28.2  27.6  14.9   3.6   0.3   0.0   0.0   1.4  13.5  27.4  30.9 |  178.7
    Min Temp <= 20  |  26.3  17.1   6.1   0.9   0.0   0.0   0.0   0.0   0.0   0.2  11.0  27.3 |   88.9
    Min Temp  <= 0  |   6.6   1.7   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   4.2 |   12.7
                    |                                                                         |
Avg Dew Point Temp  |  13.1  18.6  21.8  25.4  32.6  37.6  44.9  46.0  39.0  30.6  22.5  13.6 |   28.8
Avg Wet Bulb Temp   |  17.3  24.3  32.0  38.0  45.5  51.2  57.5  56.5  48.9  39.8  29.4  18.3 |   38.2
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.30 30.17 30.04 29.97 29.93 29.91 29.92 29.95 29.99 30.06 30.19 30.29 |  30.06
(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   0.5   2.0   3.1   3.7   4.9   4.4   3.2   1.6   0.1   0.0 |   23.5
    Heavy Fog       |   5.6   2.5   1.0   0.2   0.2   0.0   0.1   0.0   0.2   0.3   0.5   4.2 |   14.8
    Fog             |  21.3  13.7   5.1   4.5   2.4   1.5   0.6   1.1   3.2   4.7   8.6  16.8 |   83.7
    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     |  0.53  0.65  0.61  0.80  0.64  0.56  0.45  0.58  1.08  1.13  0.47  0.48 |   7.99
                    |                                                                         |
Maximum Daily       |  0.40  0.49  0.52  0.47  0.74  0.84  0.99  0.51  1.06  1.28  0.47  0.55 |   1.28
                    |                                                                         |
    Date of Ext-Day |    11    23    14    24    03    04    24    21    15    21    09    07 |
               -Year|  2005  2001  2002  2005  1999  2008  1998  1998  2006  2004  2004  2007 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   6.8   7.4   6.5   6.5   6.0   4.5   4.5   5.8   6.8   6.1   4.1   5.9 |   70.9
    >= 0.10         |   2.1   2.5   2.2   3.0   1.9   1.5   1.1   1.9   2.4   2.7   1.7   1.7 |   24.8
    >= 0.25         |   0.5   0.5   0.8   1.3   0.6   0.7   0.5   0.7   1.6   1.6   0.5   0.5 |   10.0
    >= 0.50         |   0.0   0.0   0.1   0.0   0.1   0.3   0.2   0.1   0.6   0.6   0.0   0.1 |    2.1
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.2   0.1   0.0   0.0 |    0.3
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   2.8   3.7   5.6   7.1   6.7   6.5   5.5   5.4   5.1   4.7   3.9   3.0 |    5.0
Daily Avg Max 2-Min |   9.4  11.6  16.7  21.1  20.8  20.9  18.6  18.7  15.9  13.9  11.5  10.0 |   15.8
Daily Avg Peak Gust |  10.8  13.9  21.1  26.8  26.8  26.8  23.7  24.3  20.2  17.6  13.9  11.8 |   19.8
                    |                                                                         |
Maximum Daily Avg   |  12.6  13.2  19.8  17.6  15.1  16.6   9.6  13.4  12.2  12.9  15.7  13.4 |   19.8
                    |                                                                         |
Maximum 2-Minute Avg|    28    37    37    45    40    79    38    38    40    35    33    33 |     79
                    |                                                                         |
Date of Max 2min-Day|    12    09    20    15    28    05    02    11    14    02    30    15 |
               -Year|  2000  2006  2000  2002  2000  2000  1999  2001  2007  2006  2008  2000 |
                    |                                                                         |
Maximum Peak Gust   |    36    44    48    59    53    87    48    55    56    51    52    43 |     87
                    |                                                                         |
Date of Max Gust-Day|    12    09    27    20    21    05    02    11    14    21    30    15 |
               -Year|  2000  2006  2007  2008  2002  2000  1999  2001  2007  2008  2008  2003 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   0.5   1.6   5.7  11.7  11.2  10.6   7.7   8.5   5.6   4.0   1.6   1.0 |   69.6
   Peak Gust >=40   |   0.0   0.5   1.5   3.1   2.8   2.4   0.6   1.5   0.8   0.4   0.4   0.2 |   13.9
   Peak Gust >=50   |   0.0   0.0   0.0   0.6   0.2   0.6   0.0   0.2   0.2   0.1   0.1   0.0 |    1.8
                    |                                                                         |
   Max 2-Minute >=30|   0.0   0.5   1.8   3.6   4.0   3.0   0.7   1.3   1.4   0.7   0.5   0.0 |   17.5
   Max 2-Minute >=40|   0.0   0.0   0.0   0.4   0.2   0.4   0.0   0.0   0.1   0.0   0.0   0.0 |    1.0
                    |                                                                         |
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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.