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

Parameter                  Jan   Feb   Mar   Apr   May   Jun   Jul   Aug   Sep   Oct   Nov   Dec  Year
Mean Temperature(F)
   Maximum                 48.5  53.3  58.1  62.5  68.0  74.4  82.7  83.5  79.4  66.4  53.8  46.9  64.6
   Minimum                 35.3  36.2  37.7  41.1  45.4  50.2  55.0  53.7  49.2  42.6  39.1  34.7  43.4
   Mean                    41.9  44.7  47.9  51.8  56.7  62.3  68.9  68.6  64.3  54.5  46.5  40.8  54.0
Extreme Temperature(F)
   Maximum                   66    75    76    90    93   102   104   105   100    95    75    67   105
   Minimum                   19    18    25    30    32    36    44    44    35    29    25     0     0
Precipitation(inches)
   Monthly mean            5.13  4.47  3.97  2.94  1.99   .98   .41   .65  1.14  2.41  5.89  5.81 35.76
   Extreme 24 hr           2.17  2.95  1.80  2.19  1.42  1.30  1.27  1.32  2.22  2.70  4.72  3.75  4.72
Snowfall(inches)
   Monthly mean             .45   .20   .02   .00   .00   .00   .00   .00   .00   .00   .03   .31   .59
Average number of days
   Temperature
      Maximum 90 or more     .0    .0    .0    .1    .3   1.2   7.3   7.5   3.6    .4    .0    .0  19.4
      Maximum 32 or less     .4    .0    .0    .0    .0    .0    .0    .0    .0    .0    .0    .8   1.4
      Minimum 32 or less   10.3   7.4   4.8   1.0    .1    .0    .0    .0    .0    .5   4.0  10.2  37.5
      Minimum 0 or less      .0    .0    .0    .0    .0    .0    .0    .0    .0    .0    .0    .1    .1
   Precipitation
      .01 inches or more   18.9  17.3  18.3  15.7  11.3   6.7   2.9   3.2   5.8  10.9  20.1  19.0 150.5
      .10 inches or more   11.1  10.5  10.3   8.4   6.0   3.1   1.1   1.9   3.0   6.2  12.6  12.0  86.4
      .50 inches or more    3.5   2.6   2.3   1.2    .7    .3    .2    .3    .6   1.4   3.8   3.9  20.6
      1.00 inches or more   1.0    .5    .3    .3    .2    .0    .0    .1    .1    .3   1.0   1.1   5.0
Degree Days
   Heating days @ 65 (F)    716   572   531   397   267   117    21    18    76   328   556   751  4374
   Growing days @ 50 (F)      5    15    35    93   215   369   585   576   428   160    27     6  2498