Monthly Means and Extremes                                         Period:     1971-2000
Sisters Ranger District, OR

Parameter                  Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec    Year
Mean Temperature(F)
   Maximum                 39.1  43.2  49.8  56.7  64.6  74.0  83.4  83.6  74.8  62.8  45.8  39.2    59.8
   Minimum                 20.0  22.8  26.1  28.5  33.4  38.3  41.7  41.1  34.7  28.9  25.3  20.0    30.1
   Mean                    29.6  33.0  38.0  42.6  49.0  56.2  62.6  62.4  54.8  45.9  35.6  29.6    44.9
Extreme Temperature(F)
   Maximum                   65    72    77    86    98   103   109   106   103    90    73    63     109
   Minimum                  -22   -22    -1    11    17    20    24    25    15     1   -16   -28     -28
Precipitation(inches)
   Monthly mean            2.32  1.72  1.17   .89   .79   .60   .45   .50   .48   .98  2.14  2.15   14.19
   Extreme 24 hr           2.02  2.27   .94  1.52  1.11  1.32  1.25   .70  1.36  1.33  2.15  2.63    2.02
Snowfall(inches)
   Monthly mean            8.25  9.55  3.41   .29   .01   .00   .00   .00   .00   .23  4.77  7.57   42.52
Average number of days
   Temperature
      Maximum 90 or more     .0    .0    .0    .0    .1   1.8   9.9   9.5   2.0    .0    .0    .0    25.5
      Maximum 32 or less    4.7   2.2    .0    .0    .0    .0    .0    .0    .0    .1   1.8   5.4    15.3
      Minimum 32 or less   27.5  24.5  25.6  21.5  14.4   7.5   2.9   3.0  11.4  21.8  23.2  27.9   209.3
      Minimum 0 or less     1.3   1.3    .0    .0    .0    .0    .0    .0    .0    .0    .6   1.5     4.8
   Precipitation
      .01 inches or more    8.7   8.1   7.9   7.5   6.4   4.4   2.8   3.3   3.4   5.4  10.4   8.5    78.7
      .10 inches or more    5.2   4.9   4.0   2.6   2.3   1.6   1.1   1.7   1.4   2.7   4.9   4.8    37.9
      .50 inches or more    1.4    .8    .5    .3    .4    .2    .2    .2    .1    .4   1.2    .9     6.0
      1.00 inches or more    .5    .3    .0    .1    .1    .0    .1    .0    .1    .1    .5    .4     1.4
Degree Days
   Heating days @ 65 (F)   1055   874   813   658   477   267   116   126   300   594   867  1076    7165
   Growing days @ 50 (F)      0     1     2    21    89   216   406   391   187    39     2     0    1398