STATION:  PASO ROBLES MUNICIPAL ARPT (KPRB), CA

CLIMATOLOGICAL SUMMARY.  Period of Record: Jul 1996 to Dec 2008

Summaries based on unedited daily ASOS data.  Errors may be present.

-----------------------------------------------------------------------------------------------

TEMPERATURE (F)     |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Avg Max Temp        |  60.1  62.0  68.3  71.7  82.4  88.5  94.4  94.4  89.1  79.8  68.5  60.5 |   76.6
Avg Min Temp        |  35.7  37.8  39.2  40.7  46.6  50.7  54.8  53.8  50.0  43.5  39.0  34.0 |   43.8
Avg Temperature     |  47.9  49.9  53.8  56.2  64.5  69.6  74.6  74.1  69.5  61.7  53.7  47.3 |   60.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    76    82    91    99   108   115   114   114   109   103    90    78 |    115
                    |                                                                         |
    Date of Ext-Day |    03    22    12    27    22    14    22    03    01    13    01    17 |
               -Year|  2001  2002  2007  2004  2000  2000  2006  1998  1998  1999  1999  1998 |
                    |                                                                         |
    Extreme Min Temp|    12    23    25    29    33    38    45    44    38    27    21    15 |     12
                    |                                                                         |
    Date of Ext-Day |    13    07    15    20    11    07    04    19    20    12    23    23 |
               -Year|  2007  2003  2002  2008  2002  1999  2005  1996  2004  2008  2003  1998 |
                    |                                                                         |
Heating Degree Days |   531   427   348   273    93    22     3     1    23   131   338   550 |   2739
Cooling Degree Days |     0     0     0     8    77   159   299   284   159    27     0     0 |   1014
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.1   1.7   8.2  15.3  22.4  22.5  14.8   5.5   0.1   0.0 |   90.7
    Max Temp >= 75  |   0.2   1.5   7.3  11.1  23.1  27.1  30.5  30.7  27.7  21.7   6.5   0.5 |  187.7
    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  |  10.7   6.7   3.5   2.3   0.0   0.0   0.0   0.0   0.0   0.3   5.7  15.2 |   44.3
    Min Temp <= 20  |   0.6   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.4 |    1.0
    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  |  37.5  39.8  41.8  40.6  43.2  45.2  49.3  48.5  44.8  41.2  40.0  37.9 |   42.5
Avg Wet Bulb Temp   |  41.8  44.3  47.2  47.9  52.5  55.5  59.2  58.0  55.0  50.2  46.1  42.2 |   50.0
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
Avg Sea Level Pres  | 30.15 30.08 30.06 30.02 29.95 29.91 29.90 29.90 29.90 29.98 30.09 30.13 |  30.01
(Inches of Mercury) |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WEATHER             |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
See disclaimer below|                                                                         |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Thunderstorms   |   0.1   0.2   0.0   0.2   0.2   0.2   0.2   0.1   0.3   0.2   0.1   0.2 |    1.8
    Heavy Fog       |   8.9   5.9   5.8   2.7   0.9   0.3   0.6   2.3   2.7   3.1   6.8   7.0 |   47.2
    Fog             |  16.4  14.9  13.5   8.3   4.6   2.9   3.8   6.2   5.5   7.5  12.9  13.8 |  110.4
    Hail            |   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.1
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  2.67  2.57  1.45  0.84  0.42  0.01  0.00  0.02  0.04  0.63  0.78  1.99 |  11.39
                    |                                                                         |
Maximum Daily       |  2.67  1.18  1.95  1.13  0.96  0.05  0.04  0.15  0.18  1.86  1.30  1.95 |   2.67
                    |                                                                         |
    Date of Ext-Day |    02    06    05    17    21    08    06    30    22    19    04    05 |
               -Year|  2006  1998  2001  2000  2006  2000  2001  2007  1999  2004  2004  1997 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   9.3   9.5   6.4   5.5   1.7   0.3   0.2   0.2   0.5   2.3   5.7   8.8 |   50.2
    >= 0.10         |   5.2   5.8   3.5   2.4   0.9   0.0   0.0   0.1   0.2   1.2   2.4   3.8 |   25.5
    >= 0.25         |   3.8   3.7   1.7   1.1   0.5   0.0   0.0   0.0   0.0   0.7   0.9   2.1 |   14.5
    >= 0.50         |   1.8   1.8   0.5   0.5   0.4   0.0   0.0   0.0   0.0   0.5   0.5   1.4 |    7.2
    >= 1.00         |   0.5   0.2   0.5   0.1   0.0   0.0   0.0   0.0   0.0   0.2   0.1   0.5 |    2.0
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.6   5.0   5.7   6.9   8.1   9.0   7.8   7.0   5.8   4.8   4.1   4.6 |    6.1
Daily Avg Max 2-Min |  15.1  16.0  16.9  18.7  20.4  22.0  21.1  20.6  18.3  16.0  14.1  15.4 |   17.9
Daily Avg Peak Gust |  17.9  19.4  20.6  23.1  25.1  26.7  25.2  24.7  21.9  19.4  17.0  18.6 |   21.6
                    |                                                                         |
Maximum Daily Avg   |  16.2  15.3  16.4  16.1  19.3  17.1  13.7  11.6  13.6  14.8  12.8  15.0 |   19.3
                    |                                                                         |
Maximum 2-Minute Avg|    38    35    39    33    30    31    29    35    26    28    37    39 |     39
                    |                                                                         |
Date of Max 2min-Day|    07    25    04    18    19    06    05    10    08    20    24    16 |
               -Year|  2005  2006  2001  2006  2006  2004  2004  2006  2001  2007  2001  2002 |
                    |                                                                         |
Maximum Peak Gust   |    48    46    47    37    40    45    36    43    32    38    45    53 |     53
                    |                                                                         |
Date of Max Gust-Day|    07    25    04    04    02    12    29    03    15    10    24    16 |
               -Year|  2005  2006  2001  2006  2008  2006  2006  2006  2006  2008  2001  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   1.4   2.4   2.9   3.8   4.7   7.1   3.6   3.2   1.3   0.8   1.0   3.4 |   35.6
   Peak Gust >=40   |   0.6   0.3   0.1   0.0   0.1   0.3   0.0   0.1   0.0   0.0   0.1   0.4 |    2.0
   Peak Gust >=50   |   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
                    |                                                                         |
   Max 2-Minute >=30|   0.6   0.5   0.4   0.1   0.4   0.8   0.0   0.6   0.0   0.0   0.1   0.0 |    3.5
   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
                    |                                                                         |
------------------------------------------------------------------------------------------------------

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.