Monthly Means and Extremes
                                                 Pelton Dam, Oregon      	  Period:     1961-1990

Parameter                 Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec   Year
Mean Temperature (F)
   Maximum                 44.9  52.3  59.6  66.7  75.7  84.5  92.6  91.8  82.7  69.7  53.2  44.6   68.3
   Minimum                 25.8  28.6  30.9  34.4  40.2  47.0  50.7  50.4  43.7  36.2  31.9  26.5   37.1
   Mean                    35.3  40.5  45.3  50.6  58.0  65.7  71.7  71.1  63.3  52.8  42.5  35.5   52.6
Extreme Temperature (F)
   Maximum                   71    78    86    95   108   108   112   112   108    96    79    68    112
   Minimum                  -12   -11    15    18    24    29    36    37    25    14     0   -15    -15
Precipitation (inches)
   Monthly mean            1.52   .93   .85   .67   .67   .57   .29   .46   .47   .61  1.50  1.54  10.01
   Extreme 24 hour          .93  1.15   .70  1.22   .86   .87   .70   .78  1.15   .74  1.80  2.00   2.00
Snowfall (inches)
   Monthly mean            1.94   .04   .00   .00   .00   .00   .00   .00   .00   .02   .73  1.15   4.55
Average number of days
   Temperature
      Maximum 90 or more     .0    .0    .0    .3   3.4  10.0  20.4  19.9   8.2    .6    .0    .0   64.8
      Maximum 32 or less    3.7    .7    .0    .0    .0    .0    .0    .0    .0    .0    .5   3.2    7.8
      Minimum 32 or less   23.7  19.6  18.9  12.7   4.4    .1    .0    .0   1.0   9.9  16.3  24.1  131.4
      Minimum 0 or less      .7    .3    .0    .0    .0    .0    .0    .0    .0    .0    .0    .6    1.8
   Precipitation
      .01 inches or more    8.7   8.1   7.9   5.4   5.0   3.7   2.4   3.1   3.5   5.0   9.7  10.2   72.3
      .10 inches or more    5.1   2.9   2.9   2.1   2.5   1.7   1.0   1.6   1.4   2.1   4.5   4.6   32.2
      .50 inches or more     .6    .2    .1    .2    .1    .2    .1    .2    .2    .1    .7    .6    3.3
      1.00 inches or more    .0    .1    .0    .1    .0    .0    .0    .0    .0    .0    .1    .1     .3
Degree Days
   Heating days @ 65F       920   692   612   434   241    77    13    15   105   381   675   916   5109
   Growing days @ 50F         2     5    22    90   258   472   672   654   400   134    13     2   2732

                                                                         Oregon Climate Service