STATION:  SACRAMENTO INTL AIRPORT (KSMF), CA

CLIMATOLOGICAL SUMMARY.  Period of Record: May 1998 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        |  54.0  59.3  66.3  71.0  81.5  88.3  93.4  92.3  87.7  77.8  63.6  55.1 |   74.2
Avg Min Temp        |  38.2  40.2  42.6  44.6  51.8  56.7  59.5  58.2  54.7  47.7  41.9  37.8 |   47.8
Avg Temperature     |  46.1  49.8  54.5  57.8  66.6  72.5  76.4  75.2  71.2  62.8  52.7  46.4 |   61.0
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    67    75    87    96   103   107   111   108   104   104    80    77 |    111
                    |                                                                         |
    Date of Ext-Day |    23    27    10    26    31    14    22    04    01    01    04    08 |
               -Year|  2006  2002  2008  2004  2001  2000  2006  1998  1998  2001  2001  2008 |
                    |                                                                         |
    Extreme Min Temp|    21    26    29    31    38    44    46    49    42    31    27    19 |     19
                    |                                                                         |
    Date of Ext-Day |    13    16    08    09    04    08    22    19    30    31    23    22 |
               -Year|  2007  2006  2002  1999  1999  1999  2008  1999  2007  2002  2003  1998 |
                    |                                                                         |
Heating Degree Days |   587   430   327   228    55     7     0     0     9   106   368   576 |   2693
Cooling Degree Days |     0     0     1    12   106   232   355   318   194    37     0     0 |   1254
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.5   6.5  13.5  22.9  21.7  13.5   2.2   0.0   0.0 |   80.8
    Max Temp >= 75  |   0.0   0.1   5.3   9.8  24.0  28.6  31.0  30.7  28.4  20.1   2.4   0.1 |  180.7
    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  |   7.5   2.8   0.4   0.2   0.0   0.0   0.0   0.0   0.0   0.1   2.6   8.0 |   21.6
    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   0.2 |    0.2
    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  |  40.5  42.6  44.1  44.1  48.4  51.8  55.3  54.3  50.3  44.6  44.2  40.2 |   46.7
Avg Wet Bulb Temp   |  43.4  46.2  49.2  50.7  56.4  60.2  63.0  62.2  58.9  52.9  48.3  43.4 |   52.9
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
Avg Sea Level Pres  | 30.16 30.08 30.05 29.99 29.92 29.87 29.86 29.86 29.86 29.97 30.09 30.15 |  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   |   1.5   1.2   1.1   0.9   0.7   0.4   0.5   0.4   1.3   1.4   2.1   1.3 |   12.6
    Heavy Fog       |   9.7   3.7   2.2   0.4   0.2   0.0   0.0   0.1   0.0   0.8   6.7   7.6 |   31.4
    Fog             |  24.2  19.8  14.5   7.4   4.7   1.0   0.8   2.5   3.2   9.0  19.8  21.6 |  128.6
    Hail            |   0.0   0.3   0.0   0.0   0.2   0.0   0.0   0.0   0.0   0.0   0.0   0.0 |    0.5
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
PRECIPITATION (In)  |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Average Monthly     |  3.18  3.72  1.92  1.40  0.63  0.08  0.00  0.07  0.08  0.65  1.90  3.50 |  17.12
                    |                                                                         |
Maximum Daily       |  2.04  2.52  1.14  1.66  1.34  0.32  0.02  0.74  0.22  1.04  2.10  1.93 |   2.52
                    |                                                                         |
    Date of Ext-Day |    24    25    15    05    28    08    31    22    19    26    07    31 |
               -Year|  2000  2004  2003  1999  1998  2005  2003  2003  2004  2004  2002  2005 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  14.4  13.3   9.5   6.6   3.6   0.7   0.1   0.2   1.0   4.0  13.1  13.5 |   80.0
    >= 0.10         |   6.3   7.8   4.6   3.4   1.6   0.4   0.0   0.1   0.4   1.6   4.3   7.1 |   37.6
    >= 0.25         |   3.8   5.6   3.0   2.0   0.6   0.1   0.0   0.1   0.0   0.7   2.4   5.0 |   23.3
    >= 0.50         |   2.3   2.8   1.3   0.8   0.2   0.0   0.0   0.1   0.0   0.4   1.1   1.8 |   10.8
    >= 1.00         |   0.7   0.5   0.2   0.1   0.1   0.0   0.0   0.0   0.0   0.1   0.3   0.7 |    2.7
                    |                                                                         |
------------------------------------------------------------------------------------------------------
                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|   6.8   7.8   7.9   8.5   8.7   9.0   8.6   8.2   7.4   6.9   6.2   7.5 |    7.8
Daily Avg Max 2-Min |  15.6  16.9  17.0  17.9  17.4  16.9  15.9  15.3  15.1  15.0  14.7  16.9 |   16.2
Daily Avg Peak Gust |  18.4  20.1  20.2  21.9  21.2  20.4  18.8  18.2  18.1  18.0  17.5  20.4 |   19.4
                    |                                                                         |
Maximum Daily Avg   |  28.6  23.7  23.3  19.7  24.2  22.4  16.5  18.6  23.7  24.4  24.7  30.2 |   30.2
                    |                                                                         |
Maximum 2-Minute Avg|    58    48    44    36    38    38    29    30    35    38    46    47 |     58
                    |                                                                         |
Date of Max 2min-Day|    04    25    04    03    02    16    30    03    03    21    24    29 |
               -Year|  2008  2004  2001  1999  2001  1998  2003  2008  2004  2000  2001  2003 |
                    |                                                                         |
Maximum Peak Gust   |    66    61    52    45    47    48    35    56    43    46    56    56 |     66
                    |                                                                         |
Date of Max Gust-Day|    04    25    04    28    02    16    30    03    22    21    24    14 |
               -Year|  2008  2004  2001  2004  2001  1998  2003  2008  2006  2000  2001  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   4.2   5.4   4.4   4.9   2.9   1.5   0.3   0.4   1.4   3.1   2.9   6.3 |   37.6
   Peak Gust >=40   |   0.9   1.5   0.9   0.7   0.2   0.3   0.0   0.1   0.1   0.5   0.6   2.2 |    7.9
   Peak Gust >=50   |   0.3   0.1   0.2   0.0   0.0   0.0   0.0   0.1   0.0   0.0   0.3   0.5 |    1.4
                    |                                                                         |
   Max 2-Minute >=30|   2.2   2.3   1.6   1.0   0.7   0.6   0.0   0.1   0.5   1.0   1.3   0.0 |   11.3
   Max 2-Minute >=40|   0.4   0.2   0.1   0.0   0.0   0.0   0.0   0.0   0.0   0.0   0.4   0.0 |    1.1
                    |                                                                         |
------------------------------------------------------------------------------------------------------

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.