STATION:  SAIPAN AP-N. MARIANA ISLANDS (PGSN), PI

CLIMATOLOGICAL SUMMARY.  Period of Record: Jan 2000 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        |  84.1  83.9  85.0  86.6  87.4  87.9  87.0  86.3  86.2  86.3  85.9  85.0 |   86.0
Avg Min Temp        |  75.8  75.4  76.0  76.8  78.1  78.4  77.6  77.2  76.7  77.3  77.4  76.9 |   77.0
Avg Temperature     |  80.0  79.6  80.5  81.7  82.8  83.1  82.3  81.7  81.4  81.8  81.7  81.0 |   81.5
                    |                                                                         |
Extremes:           |                                                                         |
    Extreme Max Temp|    88    88    88    90    90    91    91    90    90    89    88    88 |     91
                    |                                                                         |
    Date of Ext-Day |    22    16    31    24    20    07    03    31    06    17    03    02 |
               -Year|  2008  2008  2004  2001  2001  2001  2007  2008  2002  2001  2003  2008 |
                    |                                                                         |
    Extreme Min Temp|    70    69    69    69    74    72    73    71    73    69    69    66 |     66
                    |                                                                         |
    Date of Ext-Day |    04    20    04    08    21    19    29    12    10    04    10    14 |
               -Year|  2000  2000  2008  2000  2001  2004  2002  2005  2000  2007  2007  2000 |
                    |                                                                         |
Heating Degree Days |     0     0     0     0     0     0     0     0     0     0     0     0 |      0
Cooling Degree Days |   464   413   480   501   551   544   536   519   493   521   499   495 |   6016
                    |                                                                         |
Avg Number of Days: |                                                                         |
    Max Temp >= 90  |   0.0   0.0   0.0   0.4   0.9   4.3   1.3   0.1   0.1   0.0   0.0   0.0 |    7.3
    Max Temp >= 75  |  31.0  28.2  31.0  30.0  31.0  30.0  31.0  31.0  30.0  31.0  30.0  31.0 |  365.2
    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  |   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 <= 20  |   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  <= 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  |  71.4  72.2  72.6  69.6  73.9  75.2  75.7  76.0  75.9  76.1  75.6  74.1 |   74.0
Avg Wet Bulb Temp   |  73.8  74.4  74.8  71.8  76.2  77.4  77.4  77.7  77.4  77.6  77.4  76.2 |   76.0
                    |                                                                         |
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                    |                                                                         |
Avg Sea Level Pres  | 29.86 29.88 29.90 29.88 29.86 29.85 29.83 29.82 29.82 29.83 29.83 29.87 |  29.85
(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   0.0   0.0   0.1   1.6   1.9   3.5   4.2   2.9   2.6   1.3   0.0 |   18.1
    Heavy Fog       |   0.0   0.1   0.0   0.0   0.0   0.1   0.4   1.6   0.5   0.1   0.6   0.1 |    3.7
    Fog             |  10.2  14.1  14.1  12.4  11.7  16.4  18.6  18.6  16.3  16.1  14.1  15.6 |  178.2
    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     |  2.57  2.93  2.84  3.47  3.15  6.19  8.72 14.42 11.02  9.18  7.52  4.59 |  76.59
                    |                                                                         |
Maximum Daily       |  1.31  1.03  1.36  3.29  2.69  7.78  4.07  6.88  3.79  5.11  2.43  2.31 |   7.78
                    |                                                                         |
    Date of Ext-Day |    18    02    07    28    14    28    09    24    19    04    27    08 |
               -Year|  2003  2000  2008  2003  2000  2004  2001  2004  2002  2003  2004  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
    >= 0.01         |  19.2  18.7  20.3  18.2  19.1  24.1  27.0  27.5  25.1  26.8  23.7  25.7 |  275.4
    >= 0.10         |   6.0   8.1   6.3   7.5   8.6  11.1  15.8  17.1  17.1  16.6  14.2  11.8 |  140.2
    >= 0.25         |   2.6   4.0   3.3   3.6   3.4   5.5   9.6  12.2  10.7  10.3   9.3   5.6 |   80.1
    >= 0.50         |   1.2   1.3   1.9   1.9   0.7   2.5   5.0   8.6   7.0   5.7   4.4   1.9 |   42.0
    >= 1.00         |   0.4   0.1   0.4   0.6   0.3   1.3   2.2   3.4   3.3   2.4   1.6   0.7 |   16.8
                    |                                                                         |
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                    |                                                                         |
WIND (MPH)          |   Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec |   Year
                    |                                                                         |
Daily Avg Wind Speed|  12.1  12.9  12.9  12.7  11.2  11.3   8.8   8.9   7.7   9.4  12.9  13.1 |   11.2
Daily Avg Max 2-Min |  20.2  21.3  20.8  20.5  19.0  19.6  18.8  19.4  17.9  19.6  22.9  22.4 |   20.2
Daily Avg Peak Gust |  25.2  26.5  25.2  24.7  23.1  24.1  23.2  23.9  22.0  24.3  28.4  27.9 |   24.9
                    |                                                                         |
Maximum Daily Avg   |  22.5  23.0  21.9  21.7  17.5  37.3  26.5  35.7  21.4  22.1  24.8  29.8 |   37.3
                    |                                                                         |
Maximum 2-Minute Avg|    35    35    33    35    31    62    40    62    45    36    39    46 |     62
                    |                                                                         |
Date of Max 2min-Day|    17    13    10    07    20    28    05    22    01    13    21    08 |
               -Year|  2003  2001  2005  2004  2008  2004  2002  2004  2005  2004  2002  2002 |
                    |                                                                         |
Maximum Peak Gust   |    40    43    39    43    39    77    52    78    54    44    49    58 |     78
                    |                                                                         |
Date of Max Gust-Day|    17    13    17    06    20    28    22    22    01    13    19    08 |
               -Year|  2003  2001  2004  2004  2008  2004  2002  2004  2005  2004  2007  2002 |
                    |                                                                         |
Avg Number of Days: |                                                                         |
   Peak Gust >=30   |   6.1   9.8   8.4   4.3   2.5   3.7   5.7   6.3   4.5   7.0  12.5  13.0 |   83.9
   Peak Gust >=40   |   0.1   0.3   0.0   0.3   0.0   0.4   1.2   1.6   0.6   0.3   1.6   1.3 |    7.7
   Peak Gust >=50   |   0.0   0.0   0.0   0.0   0.0   0.3   0.3   0.4   0.1   0.0   0.0   0.1 |    1.2
                    |                                                                         |
   Max 2-Minute >=30|   0.6   1.7   1.0   0.9   0.1   0.7   1.2   2.1   1.7   0.9   2.4   0.0 |   13.2
   Max 2-Minute >=40|   0.0   0.0   0.0   0.0   0.0   0.3   0.1   0.4   0.1   0.0   0.0   0.0 |    1.0
                    |                                                                         |
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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.