Monthly Means and Extremes
                                                 Dayville, Oregon        Period:     1961-1990

Parameter                 Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec   Year
Mean Temperature (F)
   Maximum                 43.5  49.8  57.8  65.7  72.4  82.0  90.6  90.1  80.5  68.3  52.3  43.2   70.4
   Minimum                 28.2  28.2  33.6  37.2  42.6  48.9  52.9  52.4  45.4  39.3  31.1  24.2   41.2
   Mean                    36.9  38.8  45.7  51.5  57.5  65.4  71.7  71.3  63.0  53.8  41.4  33.7   56.1
Extreme Temperature (F)
   Maximum                   67    72    80    95   102   103   110   110   106    95    78    65    110
   Minimum                   -3   -11    18    21    25    33    39    39    25    14     3   -18    -18
Precipitation (inches)
   Monthly mean             .77   .85  1.32  1.24  1.82  1.07   .52   .94   .48   .70  1.11   .83  11.65
   Extreme 24 hour          .55   .63   .67   .88  1.51   .64  1.15  1.83   .62  1.15   .72   .49   1.83
Snowfall (inches)
   Monthly mean            2.68  2.08   .39   .04   .00   .00   .00   .00   .00   .00  1.71  4.07   8.27
Average number of days
   Temperature
      Maximum 90 or more     .0    .0    .0    .2   2.9   7.8  17.9  17.4   6.6    .7    .0    .0   49.3
      Maximum 32 or less    3.4   1.2    .0    .0    .0    .0    .0    .0    .0    .0    .4   4.3    7.6
      Minimum 32 or less   22.0  16.4  12.8   7.4   2.3    .0    .0    .0    .8   5.5  16.9  22.0   87.7
      Minimum 0 or less      .3   1.0    .0    .0    .0    .0    .0    .0    .0    .0    .0   1.4    2.4
   Precipitation
      .01 inches or more    8.0   7.7  12.2  10.1  10.2   8.6   3.5   4.3   4.8   6.5   9.3   7.1   86.8
      .10 inches or more    2.7   2.8   4.2   3.6   4.7   3.1   1.4   2.4   1.8   2.4   3.6   3.2   33.9
      .50 inches or more     .1    .3    .3    .4    .9    .4    .2    .5    .1    .1    .4    .0    3.5
      1.00 inches or more    .0    .0    .0    .0    .2    .0    .1    .2    .0    .1    .0    .0     .5
Degree Days
   Heating days @ 65F       865   664   579   405   263    86    17    14   131   356   692   869   5215
   Growing days @ 50F         3     7    23   121   249   451   673   658   393   169    17     1   2894

                                                                         Oregon Climate Service