STATION:  RAMONA AIRPORT (KRNM), CA

CLIMATOLOGICAL SUMMARY.  Period of Record: Apr 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        |  65.5  64.5  67.0  69.7  75.3  82.2  89.0  89.8  86.4  78.8  71.7  65.5 |   75.5
Avg Min Temp        |  34.2  36.8  38.9  41.4  47.7  51.3  56.8  57.1  53.2  47.2  39.8  33.9 |   44.9
Avg Temperature     |  49.9  50.7  52.9  55.6  61.5  66.7  72.9  73.4  69.8  63.0  55.7  49.7 |   60.2
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    88    88    91    97   100   107   111   104   108   100    92    85 |    111
                    |                                                                         |
    Date of Ext-Day |    31    22    29    27    03    21    22    28    03    21    06    24 |
               -Year|  2003  2002  2004  2004  2004  2008  2006  2005  2007  2003  2006  2005 |
                    |                                                                         |
    Extreme Min Temp|    16    22    27    27    33    41    43    43    39    34    26    21 |     16
                    |                                                                         |
    Date of Ext-Day |    17    22    21    10    10    08    25    15    25    29    14    24 |
               -Year|  2007  2006  1999  1999  2003  2005  1999  1999  2005  2006  2000  1998 |
                    |                                                                         |
Heating Degree Days |   470   405   374   288   132    32     1     0    18   108   283   475 |   2586
Cooling Degree Days |     1     0     0     5    23    85   245   262   162    47     5     0 |    835
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.2   0.8   2.4   5.7  14.2  16.9  11.4   5.4   0.5   0.0 |   57.5
    Max Temp >= 75  |   4.9   4.6   6.6   8.8  15.8  24.5  31.0  30.6  26.7  19.7  11.2   5.1 |  189.5
    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  |  13.5   8.0   4.1   0.9   0.0   0.0   0.0   0.0   0.0   0.0   2.8  14.8 |   44.1
    Min Temp <= 20  |   0.3   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.3
    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  |  35.1  37.3  41.7  44.4  49.7  52.5  56.6  56.3  52.7  45.0  39.0  32.4 |   45.2
Avg Wet Bulb Temp   |  43.2  44.6  47.2  49.5  54.5  58.0  62.4  62.5  59.3  52.9  47.4  41.3 |   51.9
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 30.09 30.06 30.01 29.99 29.93 29.89 29.90 29.89 29.87 29.94 30.03 30.09 |  29.97
(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   0.1   0.2   0.0   0.0   0.1   0.1   0.1   0.2   0.1   0.0   0.0 |    0.9
    Heavy Fog       |   7.2   6.2   9.0   6.8   8.7   8.5   7.4   6.0   6.5   7.5   7.3   6.5 |   87.4
    Fog             |  19.2  18.7  22.8  22.7  22.8  19.8  15.8  13.2  13.3  16.6  17.7  16.7 |  219.2
    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     |  2.01  3.40  1.42  1.20  0.48  0.03  0.08  0.07  0.10  0.78  1.04  1.52 |  12.13
                    |                                                                         |
Maximum Daily       |  1.85  1.75  1.24  1.18  0.93  0.04  0.41  0.16  0.18  1.84  2.53  2.24 |   2.53
                    |                                                                         |
    Date of Ext-Day |    11    25    15    14    12    11    23    02    06    27    30    17 |
               -Year|  2005  2003  2003  2003  1998  1998  2005  2000  2002  2004  2007  2008 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |   7.1   9.5   7.8   7.2   3.5   2.4   2.4   3.1   4.4   4.2   5.4   7.6 |   64.5
    >= 0.10         |   3.8   6.0   3.1   2.7   1.1   0.0   0.1   0.2   0.2   1.5   1.9   2.8 |   23.3
    >= 0.25         |   2.1   3.8   1.9   1.4   0.6   0.0   0.1   0.0   0.0   0.8   1.2   1.5 |   13.5
    >= 0.50         |   1.2   2.6   1.1   0.8   0.3   0.0   0.0   0.0   0.0   0.4   0.5   0.7 |    7.6
    >= 1.00         |   0.5   0.9   0.1   0.2   0.0   0.0   0.0   0.0   0.0   0.2   0.3   0.5 |    2.6
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   4.7   5.0   5.0   5.1   5.0   5.1   5.0   4.9   4.5   4.6   4.3   4.5 |    4.8
Daily Avg Max 2-Min |  16.0  16.4  16.7  16.6  15.4  14.9  15.0  14.8  15.0  15.5  15.1  15.6 |   15.6
Daily Avg Peak Gust |  19.3  19.9  20.5  21.1  19.6  18.9  18.8  18.9  18.9  19.3  18.5  18.9 |   19.4
                    |                                                                         |
Maximum Daily Avg   |  17.7  22.2  18.8  14.1  10.7   9.6   6.9   7.1   9.5  18.6  15.4  21.2 |   22.2
                    |                                                                         |
Maximum 2-Minute Avg|    40    41    36    66    36    41    33    37    24    39    33    40 |     66
                    |                                                                         |
Date of Max 2min-Day|    07    10    31    25    10    30    08    01    27    21    28    16 |
               -Year|  2003  2002  2005  2008  2008  2008  2008  2008  2002  2007  2002  2004 |
                    |                                                                         |
Maximum Peak Gust   |    48    48    54    81    69    45    44    45    30    55    41    47 |     81
                    |                                                                         |
Date of Max Gust-Day|    07    10    03    25    10    30    18    01    30    22    28    16 |
               -Year|  2003  2002  2008  2008  2008  2008  2008  2008  2001  2007  2002  2004 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   3.1   2.0   3.0   2.2   0.6   0.2   0.8   0.3   0.2   1.4   1.7   2.7 |   18.2
   Peak Gust >=40   |   0.3   0.7   0.7   0.5   0.1   0.1   0.2   0.2   0.0   0.2   0.1   0.8 |    3.9
   Peak Gust >=50   |   0.0   0.0   0.2   0.3   0.1   0.0   0.0   0.0   0.0   0.2   0.0   0.0 |    0.8
                    |                                                                         |
   Max 2-Minute >=30|   0.5   0.7   0.9   0.6   0.1   0.2   0.6   0.2   0.0   0.3   0.2   0.0 |    4.2
   Max 2-Minute >=40|   0.1   0.1   0.0   0.2   0.0   0.1   0.0   0.0   0.0   0.0   0.0   0.0 |    0.5
                    |                                                                         |
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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.