Monthly Means and Extremes
Drain, Oregon Period: 1961-1990
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature (F)
Maximum 47.9 53.3 57.6 62.5 69.2 76.0 83.0 83.2 78.0 66.9 54.0 47.5 65.0
Minimum 33.7 35.5 36.7 38.8 42.8 48.0 49.9 50.1 46.0 42.3 39.1 34.9 41.4
Mean 40.8 44.4 47.2 50.6 56.0 62.0 66.5 66.7 62.0 54.6 46.5 41.2 53.2
Extreme Temperature (F)
Maximum 67 74 82 91 99 102 105 107 106 96 75 70 107
Minimum 0 4 21 24 29 32 36 37 26 22 16 1 0
Precipitation (inches)
Monthly mean 7.04 5.50 5.27 3.34 2.14 1.14 .45 .87 1.42 3.47 7.65 7.82 45.70
Extreme 24 hour 3.25 3.65 2.50 1.40 1.46 .99 1.18 2.10 1.84 1.51 4.44 4.92 4.92
Snowfall (inches)
Monthly mean .64 1.23 .03 .00 .00 .00 .00 .00 .00 .00 .20 .78 3.72
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .1 1.1 2.6 7.4 7.3 3.3 .3 .0 .0 22.4
Maximum 32 or less .4 .1 .0 .0 .0 .0 .0 .0 .0 .0 .1 .6 1.2
Minimum 32 or less 12.7 8.7 7.6 3.7 .8 .0 .0 .0 .6 1.9 4.0 9.3 50.0
Minimum 0 or less .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0
Precipitation
.01 inches or more 17.8 16.0 18.6 15.0 10.2 6.6 2.5 3.7 5.9 11.2 18.3 18.4 143.0
.10 inches or more 12.3 11.7 12.4 9.2 6.3 3.4 1.2 2.4 3.4 7.2 13.6 13.4 96.1
.50 inches or more 4.8 4.0 3.6 1.8 1.0 .6 .2 .3 1.0 2.5 5.3 5.5 30.3
1.00 inches or more 1.9 1.0 .8 .3 .1 .0 .1 .1 .1 .5 2.2 2.0 9.1
Degree Days
Heating days @ 65F 750 582 552 431 289 127 43 38 119 325 555 738 4550
Growing days @ 50F 5 12 30 81 199 360 510 516 360 161 27 7 2266
Oregon Climate Service