STATION:  LAS VEGAS MCCARRAN INTERNATIONAL AIRPORT (KLAS), N

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 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        |  58.4  61.6  71.1  77.3  89.9  99.2 104.6 102.5  93.9  80.5  67.0  56.7 |   80.2
Avg Min Temp        |  39.3  42.3  48.9  55.1  65.8  74.7  80.7  79.2  70.7  58.2  46.5  38.3 |   58.3
Avg Temperature     |  48.9  51.9  60.0  66.2  77.9  86.9  92.7  90.9  82.3  69.3  56.7  47.5 |   69.3
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    75    81    92    99   109   113   117   112   107   100    84    73 |    117
                    |                                                                         |
    Date of Ext-Day |    31    01    21    27    28    15    19    12    15    01    07    16 |
               -Year|  2003  2003  2004  2000  2003  2000  2005  2002  2000  2000  2007  1998 |
                    |                                                                         |
    Extreme Min Temp|    23    25    31    38    45    49    37    66    54    37    30    20 |     20
                    |                                                                         |
    Date of Ext-Day |    31    01    03    02    14    03    16    31    19    29    30    22 |
               -Year|  2002  2002  2002  1997  1998  2003  2004  2000  1996  1996  2004  1998 |
                    |                                                                         |
Heating Degree Days |   500   369   188    80     6     1     0     0     0    43   255   544 |   1986
Cooling Degree Days |     0     0    32   116   400   659   857   801   518   178     7     0 |   3568
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.4   2.7  17.2  26.6  30.5  30.6  22.8   5.0   0.0   0.0 |  135.8
    Max Temp >= 75  |   0.1   0.7  12.5  19.1  28.9  29.9  31.0  31.0  30.0  23.0   5.5   0.0 |  211.6
    Max Temp <= 32  |   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
                    |                                                                         |
    Min Temp <= 32  |   3.6   1.2   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.3   5.0 |   10.2
    Min Temp <= 20  |   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
    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  |  25.2  26.0  26.5  27.6  31.5  34.9  45.6  46.8  40.0  32.9  27.9  23.5 |   32.4
Avg Wet Bulb Temp   |  39.2  41.3  45.3  48.6  54.8  59.4  65.2  64.9  59.3  51.4  44.0  37.9 |   50.9
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.10 30.05 29.95 29.89 29.82 29.82 29.78 29.79 29.83 29.93 30.04 30.12 |  29.93
(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   0.6   0.3   0.2   0.2   0.8   3.7   3.5   1.5   0.8   0.2   0.2 |   12.2
    Heavy Fog       |   0.1   0.0   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.0   0.0   0.1 |    0.2
    Fog             |   2.0   3.5   1.0   0.9   0.0   0.1   0.7   0.3   0.6   1.1   1.3   1.0 |   12.5
    Hail            |   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.1   0.1   0.0   0.0   0.0 |    0.2
                    |                                                                         |
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                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  0.34  1.13  0.23  0.20  0.02  0.03  0.56  0.32  0.42  0.36  0.38  0.40 |   4.40
                    |                                                                         |
Maximum Daily       |  0.81  0.78  0.50  0.63  0.10  0.08  1.29  0.58  0.71  0.94  0.78  1.13 |   1.29
                    |                                                                         |
    Date of Ext-Day |    03    11    25    02    13    02    08    27    25    18    21    29 |
               -Year|  2005  2005  1998  2004  1998  1999  1999  2007  1997  2005  2004  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   2.2   4.9   2.2   1.8   0.6   0.5   2.7   2.6   1.9   1.9   1.7   2.2 |   25.2
    >= 0.10         |   1.2   2.7   1.0   0.5   0.2   0.0   1.5   0.9   0.8   1.2   0.9   0.8 |   11.8
    >= 0.25         |   0.4   1.6   0.2   0.3   0.0   0.0   0.8   0.4   0.8   0.5   0.5   0.6 |    6.1
    >= 0.50         |   0.2   1.0   0.1   0.1   0.0   0.0   0.4   0.2   0.5   0.1   0.3   0.2 |    3.0
    >= 1.00         |   0.0   0.0   0.0   0.0   0.0   0.0   0.1   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|   6.6   7.2   8.2   9.9   9.5   9.5   8.3   7.9   7.4   6.9   5.9   6.2 |    7.8
Daily Avg Max 2-Min |  16.3  18.3  19.7  22.5  22.2  21.4  21.4  19.9  18.7  16.9  15.2  15.9 |   19.0
Daily Avg Peak Gust |  19.6  22.4  24.5  28.0  27.8  26.9  26.7  25.3  23.5  20.9  18.5  19.4 |   23.6
                    |                                                                         |
Maximum Daily Avg   |  21.7  21.4  24.2  23.2  29.1  26.2  20.9  19.9  24.9  22.3  21.5  24.3 |   29.1
                    |                                                                         |
Maximum 2-Minute Avg|    44    53    46    44    56    47    45    43    41    46    40    48 |     56
                    |                                                                         |
Date of Max 2min-Day|    21    13    31    03    10    16    19    30    08    25    26    24 |
               -Year|  1999  2008  1999  1999  2000  1998  1998  1998  1998  1996  1997  2000 |
                    |                                                                         |
Maximum Peak Gust   |    52    67    56    59    64    60    54    61    49    62    49    55 |     67
                    |                                                                         |
Date of Max Gust-Day|    21    13    20    15    24    04    19    07    08    20    24    24 |
               -Year|  1999  2008  2000  2002  2000  2008  1998  1998  1998  2007  2001  2000 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   6.9   7.5   8.9  12.8  11.4  10.2   9.9   7.4   7.4   5.8   5.1   6.8 |  100.0
   Peak Gust >=40   |   1.3   1.9   2.3   3.1   3.6   1.6   1.5   1.2   0.8   1.0   0.9   2.2 |   21.2
   Peak Gust >=50   |   0.1   0.3   0.7   0.2   0.5   0.2   0.2   0.3   0.0   0.2   0.0   0.3 |    2.9
                    |                                                                         |
   Max 2-Minute >=30|   2.7   3.3   3.8   5.5   5.6   2.8   3.1   2.3   2.2   1.7   1.9   0.0 |   34.8
   Max 2-Minute >=40|   0.2   0.4   0.4   0.4   0.6   0.4   0.3   0.2   0.2   0.2   0.2   0.0 |    3.4
                    |                                                                         |
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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.