Monthly Means and Extremes Period: 1971-2000
Whitehorse Rach, OR
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature(F)
Maximum 40.5 45.9 52.0 58.9 67.1 76.1 85.7 84.8 76.2 65.8 50.1 41.5 62.1
Minimum 17.3 21.1 25.7 30.2 36.9 42.9 49.5 49.1 40.4 32.1 23.2 16.8 32.1
Mean 28.9 33.5 38.9 44.6 52.0 59.5 67.6 67.0 58.3 49.0 36.7 29.2 47.1
Extreme Temperature(F)
Maximum 65 70 78 84 94 97 101 103 99 92 75 65 103
Minimum -15 -21 -5 8 16 21 29 28 18 5 -5 -26 -26
Precipitation(inches)
Monthly mean .63 .70 .87 .92 .93 .55 .21 .68 .54 .57 .67 .71 7.98
Extreme 24 hr .66 2.14 1.66 2.00 1.72 .75 1.13 2.05 1.31 1.92 1.00 .76 1.31
Snowfall(inches)
Monthly mean 2.04 2.64 2.48 .99 .08 .00 .00 .00 .22 .12 1.36 1.95 15.53
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .0 .4 2.4 11.0 9.1 1.3 .1 .0 .0 22.7
Maximum 32 or less 6.1 2.2 .2 .0 .0 .0 .0 .0 .0 .0 .9 5.0 14.5
Minimum 32 or less 27.4 24.3 23.0 17.4 8.0 1.7 .1 .4 3.6 13.6 23.5 27.4 167.9
Minimum 0 or less 2.1 .9 .1 .0 .0 .0 .0 .0 .0 .0 .1 1.7 6.4
Precipitation
.01 inches or more 4.2 4.1 5.4 5.6 4.4 2.6 1.6 2.6 2.8 3.3 5.4 4.2 57.8
.10 inches or more 1.9 2.2 2.4 3.2 2.3 1.7 .7 1.7 1.7 2.0 2.5 2.6 28.7
.50 inches or more .1 .2 .4 .4 .3 .3 .1 .5 .2 .2 .3 .2 2.0
1.00 inches or more .0 .0 .1 .2 .1 .0 .0 .2 .0 .0 .0 .0 .3
Degree Days
Heating days @ 65 (F) 1098 855 774 587 368 167 39 50 197 486 811 1073 6512
Growing days @ 50 (F) 0 1 5 44 159 330 573 544 293 85 5 1 2019