Monthly Means and Extremes Period: 1971-2000
Drain , OR
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature(F)
Maximum 48.6 53.3 58.1 62.8 69.1 75.1 82.5 83.1 78.5 67.2 54.1 47.8 65.0
Minimum 33.7 35.5 37.0 39.3 43.2 47.3 50.3 50.2 45.9 41.5 38.5 34.3 41.4
Mean 41.2 44.4 47.6 51.1 56.2 61.2 66.4 66.7 62.2 54.4 46.3 41.1 53.2
Extreme Temperature(F)
Maximum 67 78 83 91 99 98 106 107 106 96 75 70 107
Minimum 9 4 24 28 31 34 37 37 32 22 16 1 1
Precipitation(inches)
Monthly mean 7.20 6.13 5.28 3.81 2.52 1.30 .46 .87 1.38 3.25 7.79 7.87 47.86
Extreme 24 hr 3.25 3.65 2.50 1.56 1.46 .99 1.18 2.10 1.84 1.79 5.92 4.92 5.92
Snowfall(inches)
Monthly mean .39 1.20 .03 .00 .00 .00 .00 .00 .00 .00 .20 .74 2.91
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .1 1.0 1.7 6.9 6.8 3.7 .4 .0 .0 20.4
Maximum 32 or less .2 .1 .0 .0 .0 .0 .0 .0 .0 .0 .1 .7 1.1
Minimum 32 or less 11.1 7.4 5.5 2.0 .2 .0 .0 .0 .1 1.6 3.9 9.1 42.3
Minimum 0 or less .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0
Precipitation
.01 inches or more 18.7 17.4 18.8 16.0 11.2 7.2 2.8 3.6 5.9 11.4 19.4 18.5 150.9
.10 inches or more 12.6 12.6 12.4 10.4 6.8 4.0 1.1 2.4 3.5 7.0 14.0 13.7 101.0
.50 inches or more 4.9 4.8 3.5 2.0 1.2 .7 .2 .4 .9 2.3 5.3 5.6 31.6
1.00 inches or more 1.9 1.2 .7 .5 .2 .0 .1 .1 .1 .5 2.1 1.9 9.5
Degree Days
Heating days @ 65 (F) 729 574 532 409 271 132 39 35 106 320 550 732 4452
Growing days @ 50 (F) 5 15 36 92 216 350 531 532 381 166 30 7 2346