STATION:  RED BLUFF MUNICIPAL ARPT (KRBL), 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        |  54.3  59.2  66.1  70.7  81.5  90.6  98.0  96.1  90.1  77.9  62.9  55.2 |   75.2
Avg Min Temp        |  37.9  40.2  43.2  46.3  54.2  61.5  65.4  62.9  58.4  50.2  42.9  38.0 |   50.1
Avg Temperature     |  46.1  49.7  54.7  58.5  67.8  76.0  81.7  79.5  74.2  64.0  52.9  46.6 |   62.7
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    74    79    89    96   105   117   115   113   108   105    84    77 |    117
                    |                                                                         |
    Date of Ext-Day |    02    08    17    26    31    25    12    10    01    01    01    16 |
               -Year|  1999  2006  2004  2004  2001  2006  1999  1996  1998  2001  1997  1998 |
                    |                                                                         |
    Extreme Min Temp|    20    25    28    30    37    46    54    54    41    36    29    21 |     20
                    |                                                                         |
    Date of Ext-Day |    14    16    10    09    11    03    20    06    30    31    12    22 |
               -Year|  2007  2006  2006  1999  2000  1999  1999  1996  2007  2003  2000  1998 |
                    |                                                                         |
Heating Degree Days |   586   432   327   218    62     6     0     0     6    99   364   570 |   2670
Cooling Degree Days |     0     0     6    23   148   337   519   447   283    70     1     0 |   1833
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.8   8.1  17.5  27.9  25.0  17.2   3.2   0.0   0.0 |   99.6
    Max Temp >= 75  |   0.0   1.4   6.5  10.3  22.7  28.4  31.0  30.9  28.7  20.3   3.5   0.1 |  183.7
    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  |   6.9   3.1   0.9   0.3   0.0   0.0   0.0   0.0   0.0   0.0   1.5   7.2 |   19.8
    Min Temp <= 20  |   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
    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  |  37.8  38.7  39.7  41.2  45.1  47.6  52.4  50.6  45.5  40.6  41.7  37.4 |   43.2
Avg Wet Bulb Temp   |  42.0  44.5  47.4  50.0  55.9  60.4  64.4  62.8  58.3  51.7  46.0  42.3 |   52.1
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
Avg Sea Level Pres  | 30.15 30.09 30.05 30.00 29.93 29.87 29.86 29.87 29.87 29.98 30.10 30.16 |  29.99
(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   |   0.3   0.5   1.1   2.0   1.1   1.3   0.9   0.5   0.2   0.4   0.4   0.2 |    8.9
    Heavy Fog       |   5.3   1.4   0.2   0.3   0.1   0.0   0.0   0.0   0.1   0.2   1.3   2.8 |   11.6
    Fog             |  18.8  12.2   8.9   5.9   4.1   1.5   0.2   0.9   0.9   3.7  13.4  16.3 |   86.8
    Hail            |   0.0   0.2   0.0   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.1   0.0 |    0.5
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  4.24  4.28  2.26  1.65  1.40  0.40  0.13  0.08  0.21  1.28  3.08  4.46 |  23.48
                    |                                                                         |
Maximum Daily       |  2.14  2.24  1.81  1.02  1.88  0.68  0.86  0.37  0.78  2.10  2.77  2.84 |   2.84
                    |                                                                         |
    Date of Ext-Day |    25    02    05    12    28    11    18    19    14    24    07    27 |
               -Year|  2008  1998  2006  2006  1998  1998  2007  1997  1997  1998  2005  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  13.0  11.3   9.2   6.9   5.3   1.7   0.3   0.6   1.2   4.7  10.0  12.2 |   76.4
    >= 0.10         |   7.5   7.1   4.8   4.1   2.8   1.0   0.2   0.3   0.6   2.5   5.8   8.2 |   44.9
    >= 0.25         |   5.4   4.9   3.0   3.0   2.0   0.8   0.2   0.2   0.4   1.8   4.2   5.8 |   31.6
    >= 0.50         |   3.2   3.4   1.2   1.0   0.6   0.3   0.2   0.0   0.1   0.8   2.4   3.1 |   16.1
    >= 1.00         |   1.1   1.1   0.4   0.1   0.3   0.0   0.0   0.0   0.0   0.2   0.5   1.1 |    4.7
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   7.4   8.7   8.3   8.5   8.3   8.4   6.8   6.8   7.1   7.5   7.2   8.4 |    7.8
Daily Avg Max 2-Min |  16.7  18.6  18.3  18.8  18.2  18.5  16.3  16.5  16.2  16.7  16.2  18.4 |   17.4
Daily Avg Peak Gust |  20.0  22.6  22.4  23.3  22.9  23.2  20.4  20.6  20.2  20.6  19.7  22.2 |   21.5
                    |                                                                         |
Maximum Daily Avg   |  26.0  29.3  23.0  22.9  20.9  23.0  13.7  17.2  21.1  21.3  27.4  30.9 |   30.9
                    |                                                                         |
Maximum 2-Minute Avg|    45    51    47    39    39    35    36    38    33    39    45    52 |     52
                    |                                                                         |
Date of Max 2min-Day|    01    25    04    28    18    08    01    23    27    28    07    15 |
               -Year|  2004  2004  2001  2004  2005  2002  1997  1999  1999  2000  1998  2002 |
                    |                                                                         |
Maximum Peak Gust   |    56    59    60    53    47    43    40    51    45    47    54    61 |     61
                    |                                                                         |
Date of Max Gust-Day|    01    25    04    16    18    10    01    23    22    27    07    15 |
               -Year|  2004  2004  2001  2002  2005  2008  1997  1999  2006  1999  1998  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   5.7   6.8   6.1   6.6   5.5   3.9   0.8   1.1   2.6   5.8   4.7   8.2 |   57.8
   Peak Gust >=40   |   1.8   2.1   1.3   1.3   0.7   0.2   0.1   0.1   0.2   0.9   1.2   3.2 |   13.0
   Peak Gust >=50   |   0.2   0.4   0.1   0.1   0.0   0.0   0.0   0.1   0.0   0.0   0.4   0.6 |    1.8
                    |                                                                         |
   Max 2-Minute >=30|   2.9   3.6   2.2   2.5   1.0   0.5   0.1   0.2   0.3   1.7   1.9   0.0 |   16.9
   Max 2-Minute >=40|   0.3   0.4   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.4   0.0 |    1.2
                    |                                                                         |
------------------------------------------------------------------------------------------------------

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.