Monthly Means and Extremes                                         Period:     1971-2000
Prineville, OR

Parameter                  Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec    Year
Mean Temperature(F)
   Maximum                 41.9  48.1  54.5  60.7  68.5  77.0  85.8  85.7  77.8  65.7  49.4  41.7    63.1
   Minimum                 21.0  23.7  25.3  28.0  34.1  40.3  42.8  41.6  34.7  28.6  25.2  20.8    30.5
   Mean                    31.5  35.9  39.9  44.4  51.3  58.7  64.3  63.7  56.3  47.2  37.3  31.3    46.8
Extreme Temperature(F)
   Maximum                   67    75    79    90    99   102   105   105   107    93    77    67     107
   Minimum                  -21   -18     6    10    18    25    29    28    19     6   -11   -34     -34
Precipitation(inches)
   Monthly mean            1.14  1.00   .95   .80  1.06   .84   .58   .45   .41   .76  1.30  1.20   10.49
   Extreme 24 hr           1.35  1.80   .66  1.08  1.73  1.40  1.62  1.51   .60  1.50  1.87  1.03    1.87
Snowfall(inches)
   Monthly mean            2.84  1.98   .46   .16   .00   .00   .00   .00   .00   .10  1.66  2.38    9.20
Average number of days
   Temperature
      Maximum 90 or more     .0    .0    .0    .0   1.0   4.1  13.0  11.5   4.1    .4    .0    .0    34.0
      Maximum 32 or less    4.1   1.4    .0    .0    .0    .0    .0    .0    .0    .0    .7   3.6    10.2
      Minimum 32 or less   26.6  23.3  24.3  19.9  11.7   3.0    .6   1.1   9.8  20.5  21.9  26.7   189.8
      Minimum 0 or less     1.2    .6    .0    .0    .0    .0    .0    .0    .0    .0    .3   1.1     3.5
   Precipitation
      .01 inches or more    8.6   8.9   9.0   7.9   7.3   5.1   3.4   2.9   4.4   5.7   9.8   8.7    83.3
      .10 inches or more    3.7   3.4   3.6   2.7   3.3   2.3   1.5   1.3   1.7   2.6   4.3   3.8    34.0
      .50 inches or more     .5    .3    .2    .2    .4    .3    .3    .2    .0    .3    .5    .6     4.0
      1.00 inches or more    .1    .0    .0    .0    .1    .1    .1    .0    .0    .0    .0    .1      .6
Degree Days
   Heating days @ 65 (F)   1004   800   753   588   398   197    72    83   248   529   793  1017    6501
   Growing days @ 50 (F)      0     2     5    33   129   277   469   445   227    58     5     1    1653