CAMP PENDLETON MCAS   (NFG) 
LAT 33 18N
LONG 117 21W 
ELEV 00075(ft) 00023(m) 
TYPE NAVY SMOS V3 16031995
PERIOD OF RECORD 1966-1993 


GENERAL SUMMARY:

               Marine  Corps Base Camp  Pendleton,  California    
          occupies  some 125,000 acres of land and is  located    
          along  the  Pacific  Coast  approximately  half  way    
          between the cities of San Diego and Los Angeles. The    
          Air Facility is located in the southwest section of     
          the base approximately five miles east of the coast.    
          The  Pacific  Ocean provides cool summers  and  warm    
          winters and the relative humidity remains within the    
          human  comfort range. The base does  not  experience    
          the  heavy smog conditions common to urban areas  to    
          the north and south.   
		                                   
               The  high incidence of night and early  morning    
          low  stratus  and fog especially during  the  winter    
          months  is the primary source of unfavorable  flying    
          conditions.  It tends to remain along the  immediate    
          coast rather than moving inland. Fog stratus  during    
          the winter months is much more unpredictable and can    
          seriously hamper low-level flying.     
		                   
               A sea breeze is experienced almost every day of    
          the  year.  Land  breezes  and  drainage  winds  are    
          experienced  but  are considered  to  be  negligible    
          because  of  low  speeds  and  variable  directions.    
          Autumn and winter Santa Ana winds do affect the base    
          but  the  high surface winds  associated  with  this    
          phenomena  are rarely experienced. During Santa  Ana    
          conditions fire stations at the 4000 foot level have    
          reported gusts up to 60 knots while at the same time    
          winds  at the airfield were less than 15 knots.  The    
          uneven terrain over most of the base does not  allow    
          for any real funnel effect.  
		                             
               Rainfall  at Camp Pendleton is heaviest  during    
          the winter months particularly late November through    
          early February. Rainfall amounts increase inland  at    
          higher  elevations. This is also true of  convective    
          type  precipitation during the summer  months.  Most    
          thunderstorm activity is restricted to inland  areas    
          of  higher elevations but the occasional storm  does    
          stray   to   the  coastal  section  of   the   base.    
          Destructive weather conditions, while possible,  are    
          not considered a serious threat in this area.           


--------------------------------------------------------------
    Percent Frequency Daily PRECIPITATION AMOUNTS

                                                                                               OF DAYS   NO.          PRECIP
                                                                                                WITH     OF          (INCHES)
                                              INCHES                                           AMOUNTS   OBS   MEAN    HI     LOW  
      NONE  TRACE    .01  <=.05  <=.10  <=.25  <=.50  <=1.0  <=2.5  <=5.0 <=10.0 <=20.0  >20.0  >=.01  

JAN   75.6    5.4    1.0    2.5    2.5    4.1    5.7    1.6    1.6      0      0      0      0  19.0     315   2.07   7.73      0
FEB   69.5    9.2    1.3    3.3    2.0    4.6    3.3    2.6    4.3      0      0      0      0  21.3     305   3.06   8.73      T
MAR   69.1    9.2    1.6    3.3    3.8    2.7    6.0    2.7    1.4     .3      0      0      0  21.7     369   2.32   6.90      0
APR   78.7    8.3    2.1    4.4    1.5    2.7     .6    1.5     .3      0      0      0      0  13.0     338    .70   1.93      T
MAY   79.4   16.1     .3    2.1     .9     .6     .3      0     .3      0      0      0      0   4.5     335    .20   1.16      0
JUN   83.7   13.5     .6    1.1     .3      0     .3     .6      0      0      0      0      0   2.8     362    .16    .96      T
JUL   85.8   11.1     .6    1.1     .8     .6      0      0      0      0      0      0      0   3.1     360    .06    .18      0
AUG   90.3    7.9     .2    1.2      0     .2      0      0      0      0      0      0      0   1.7     403    .02    .14      0
SEP   84.4   12.0    1.3    1.0     .3     .8      0     .3      0      0      0      0      0   3.6     384    .09    .53      0
OCT   77.5   13.0    1.2    4.2     .5    1.7     .7     .7     .2      0      0      0      0   9.5     400    .50   3.32      T
NOV   80.8    6.1    1.6    3.5    1.3    2.6    2.6    1.6      0      0      0      0      0  13.1     313    .83   1.68    .02
DEC   72.5    7.5    1.5    3.9    3.3    4.8    2.4    2.4    1.8      0      0      0      0  20.0     335   1.83   4.63    .05
ANN   79.2    9.7    1.1    2.6    1.4    2.1    1.9    1.2     .8      *      0      0      0  11.1    4462  11.83  19.20   4.75


* = PERCENT < .05  
T = ZERO PRECIP, SNOWFALL OR SNOW DEPTH MEASURED BUT A TRACE WAS NOTED
+ = ANNUAL HI AND LOW VALUES ARE DERIVED FROM ANNUAL TOTALS
# = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED


    Cumulative Percent Frequency Daily MINIMUM TEMPERATURES


Temp(F)  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  ANN

   >=70    0    0    0    0    0    0  2.1  2.8   .8    0    0    0   .5
   >=65    0    0    0    0  2.5  3.9 22.6 34.9 16.4  1.7    0    0  7.0
   >=60   .3    0   .3  3.8 16.9 33.5 66.2 70.4 56.1 19.9  1.0    0 22.7
   >=55  2.6  5.1  9.0 21.4 45.2 74.8 92.5 92.2 79.4 45.9  9.8  1.7 40.3
   >=50 13.5 17.7 29.7 47.9 79.8 93.6 99.2 99.7 94.8 75.1 27.6  7.6 57.4
   >=45 28.9 41.0 56.3 74.8 95.6 99.4  100 99.7  100 90.7 53.5 24.5 72.3
   >=40 53.8 68.5 84.0 95.3  100  100  100  100  100 99.0 79.1 50.0 86.0
   >=35 81.3 91.9 96.6 99.5  100  100  100  100  100  100 98.0 80.4 95.7
   >=30 96.8 99.2  100  100  100  100  100  100  100  100  100 97.1 99.4
   >=25  100 99.7  100  100  100  100  100  100  100  100  100 99.8  100
   >=20  100  100  100  100  100  100  100  100  100  100  100  100  100
   MEAN 41.0 43.1 45.7 49.0 54.0 57.3 61.2 62.1 59.1 53.6 45.4 40.0 51.0
   STDV  7.0  6.3  6.1  6.0  5.4  4.5  4.5  4.7  5.3  6.1  6.3  6.3  9.5
   #OBS  342  356  387  365  361  361  385  395  383  418  398  408 4559


* = PERCENT < .05  
# = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED


    Cumulative Percent Frequency Daily MAXIMUM TEMPERATURES 


Temp(F)  JAN  FEB  MAR  APR  MAY  JUN  JUL  AUG  SEP  OCT  NOV  DEC  ANN

  >=110    0    0    0    0    0    0   .3    0   .3   .2    0    0   .1
  >=105    0    0    0   .3    0   .5   .3   .2  1.6   .7    0    0   .3
  >=100    0    0    0   .8   .3   .8   .5  1.0  3.4  2.4    0    0   .8
   >=95    0    0   .3  1.4   .8  1.4  1.8  3.5  8.0  4.5  1.0    0  1.9
   >=90   .3   .8   .5  4.9  1.1  3.5  6.7 10.0 16.3  9.4  5.0  1.5  5.1
   >=85  4.6  5.6  3.4 10.9  2.8  8.4 22.1 25.0 28.5 19.1 11.9  5.1 12.5
   >=80 12.7 13.1  8.5 19.1 11.1 20.1 51.3 64.7 56.2 35.4 28.4 11.0 28.1
   >=75 23.6 20.3 17.8 32.8 39.3 59.2 87.4 92.7 80.3 67.0 44.8 22.2 49.6
   >=70 36.9 36.5 39.4 65.0 76.7 83.2 96.4  100 99.0 89.2 71.1 42.8 70.2
   >=65 59.4 60.7 69.1 86.6 91.1 96.5  100  100  100 98.8 91.3 64.3 85.2
   >=60 86.2 87.7 94.6 97.0 99.2  100  100  100  100 99.8 99.8 86.1 96.0
   >=55  100 99.4 99.7  100  100  100  100  100  100  100  100 98.0 99.8
   >=50  100  100  100  100  100  100  100  100  100  100  100  100  100
   MEAN 68.3 68.2 68.7 72.7 73.1 75.7 80.3 81.8 81.8 78.3 74.6 68.6 74.5
   STDV  8.3  8.3  7.1  8.4  6.0  6.7  6.0  5.6  8.0  8.0  8.1  8.2  9.0
   #OBS  347  359  388  366  361  368  390  400  386  424  402  409 4600


* = PERCENT < .05  
# = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED

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

------------------INTERNATIONAL STATION METEOROLOGICAL CLIMATE SUMMARY-------------------

 :STA 722926 | KNFG | CAMP PENDLETON MCAS ,CA,US
:LAT 33 18N :LONG 117 21W :ELEV 00075(ft) 00023(m) :TYPE NAVY SMOS V3 16031995
37 - STATION CLIMATIC SUMMARY 


POR: (HOURLY): 1966-1993 

    TEMPERATURE (DEG F)|    PRECIPITATION (INCHES) (^)  |REL HUM|VAP|DEW| PR |WIND (KTS) |   |      MEAN NO. OF DAYS WITH (&)
       MEANS   |EXTREME|       PRECIP.     |SNOWFALL (@)|PERCENT|PR |PT.| ALT|           |SKY|PRECIP.|SNOW-  |   |   |  TEMP (DEG F)
       |   |   |   |   |     |    |    |24H|    |   |24H| (LST) |IN.|(F)| FT.|PREVAIL|MAX|CVR|INCHES |FALL(")|TH |FOG|MAX|MAX|MIN|MIN
    MAX|MIN|AVG|MAX|MIN| MEAN| MAX| MIN|MAX|MEAN|MAX|MAX| AM| PM|HG.|   |  $ |DIR|SPD|GST| + | >=| >=| >=| >=|STM| * | >=| >=| <=| <=
                                                        | 07| 16|                            |.01|.50|.10|1.5|       | 90| 70| 32| 10

JAN  68  41  55  91  25   2.1  7.7    0 2.3    0   0   0  75  54 .25  40   30 SSW   7  40 SCT   6   1   0   0   #  16   #  11   3   0
FEB  68  43  56  90  24   3.1  8.7    T 2.4    0   0   0  78  57 .28  43   30 SSW   7  49 BRK   6   2   0   0   1  15   #  10   1   0
MAR  69  46  57  98  31   2.3  6.9    0 2.7    T   T   T  84  60 .32  47   35  SW   7  45 SCT   7   1   0   0   1  19   #  12   #   0
APR  73  49  61 106  32    .7  1.9    T 1.1    0   0   0  79  57 .35  49   30  SW   7  44 SCT   4   1   0   0   0  22   1  20   #   0
MAY  73  54  64 102  40    .2  1.2    0 1.2    0   0   0  76  61 .40  53   30  SW   8  30 SCT   1   #   0   0   #  21   #  24   0   0
JUN  76  57  67 109  43    .2  1.0    T  .8    0   0   0  75  60 .44  55   30  SW   8  26 SCT   1   #   0   0   #  24   1  25   0   0
JUL  80  61  71 112  46    .1   .2    0  .2    0   0   0  76  59 .50  59   25  SW   8  26 SCT   1   0   0   0   #  22   2  30   0   0
AUG  82  62  72 105  44     T   .1    0  .1    0   0   0  78  60 .53  60   30  SW   8  29 SCT   1   0   0   0   1  22   3  31   0   0
SEP  82  59  71 110  46    .1   .5    0  .5    0   0   0  78  59 .48  58   35 SSW   7  29 SCT   1   #   0   0   #  20   5  30   0   0
OCT  78  54  66 110  37    .5  3.3    T 1.5    0   0   0  76  58 .40  52   30  SW   7  30 SCT   3   #   0   0   #  23   3  28   0   0
NOV  75  45  60  98  32    .8  1.7    T  .9    0   0   0  74  54 .28  43   30 SSW   6  47 SCT   4   #   0   0   #  16   1  21   #   0
DEC  69  40  55  91  24   1.8  4.6    0 1.6    T   T   T  75  54 .24  39   30 NNE   6  47 SCT   6   1   0   0   #  14   #  13   4   0
ANN  74  51  63 112  24  11.8 19.2  4.8 2.7    T   T   T  77  58 .36  50   35  SW   7  49 SCT  41   6   0   0   3 234  18 255   8   0
POR  13  12  12  13  12    12   12   12  12   12  12  12  17  17  13  13   13  13  13   9   9  12  12  12  12   5   5  13  12  12  12


T = TRACE AMOUNTS ( < .05  < .5 INCHES  
# = MEAN NO. DAYS < .5 DAYS 
$ = PRESSURE ALTITUDE IN TENS OF FEET (I.E.  50 = 500 FEET) 
@ = NAVY STATIONS REPORT HAIL AS SNOWFALL; ALSO NWS FROM JULY,1948 - DEC.,1955
+ = THE PREDOMINANT SKY CONDITION
* = VISIBILITY IS NOT CONSIDERED
& = ANN TOTALS MAY NOT EQUAL SUM OF MONTHLY VALUES DUE TO ROUNDING 
^ = 24 HR MAX PRECIP AND SNOWFALL ARE DAILY TOTALS (MID-NIGHT TO MID-NIGHT)  
I = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED
" = INCHES

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

             MEAN NO. OF DAYS WITH (&)          |   
          PRECIPITATION     |  OBSTR TO VISION  |   
        |FRZ |    |HAIL|    |SMOK|BLOW|DUST| OBS|   
    R/DZ|R/DZ|SNOW|/SLT|PRCP|HAZE|SNOW|SAND| VIS|   

JAN   11    0    0    #   11    7    0    0   17
FEB   12    0    0    0   12    7    0    0   16
MAR   12    0    0    #   12   10    0    0   20
APR    6    0    0    0    6   13    0    0   23
MAY   10    0    0    0   10   12    0    0   22
JUN    5    0    0    0    5   14    0    0   25
JUL    5    0    0    0    5   15    0    0   23
AUG    2    0    0    0    2   11    0    0   23
SEP    4    0    0    0    4   12    0    0   23
OCT    8    0    0    0    8   18    0    0   25
NOV    6    0    0    0    6   10    0    0   17
DEC    9    0    #    #    9    8    0    #   15
ANN   90    0    #    1   90  137    0    #  249
POR    5    5    5    5    5    5    5    5    5


& = ANN TOTALS MAY NOT EQUAL SUM OF MONTHLY VALUES DUE TO ROUNDING 
I = EXCESSIVE MISSING DATA - VALUE NOT COMPUTED
# = MEAN NO. DAYS < .5 DAYS