Monthly Means and Extremes
Brothers, Oregon Period: 1961-1990
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature (F)
Maximum 37.6 42.8 48.1 56.0 64.4 73.0 81.9 80.9 73.0 62.6 45.9 38.3 58.8
Minimum 16.8 21.1 22.5 24.8 30.6 37.7 41.8 41.0 33.8 27.9 22.8 17.3 28.2
Mean 27.2 32.0 35.3 40.4 47.5 55.4 61.9 60.9 53.4 45.2 34.4 27.8 43.5
Extreme Temperature (F)
Maximum 61 65 73 85 92 96 98 103 97 87 72 60 103
Minimum -30 -19 -10 1 8 12 18 20 10 2 -15 -30 -30
Precipitation (inches)
Monthly mean 1.06 .49 .64 .64 1.05 .95 .52 .72 .49 .67 1.21 1.10 9.38
Extreme 24 hour 1.32 .55 .44 .85 1.02 1.13 1.96 1.30 1.19 .95 1.03 1.70 1.96
Snowfall (inches)
Monthly mean 7.27 2.53 2.48 2.15 .92 .00 .00 .00 .03 .74 3.99 8.42 28.63
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .0 .2 1.1 5.3 4.9 .7 .0 .0 .0 12.3
Maximum 32 or less 8.0 2.7 .8 .1 .0 .0 .0 .0 .0 .0 2.1 6.8 20.7
Minimum 32 or less 28.5 25.9 28.6 24.8 18.5 8.2 3.8 4.4 12.5 22.5 24.9 28.9 231.4
Minimum 0 or less 3.0 .8 .0 .0 .0 .0 .0 .0 .0 .0 .6 2.5 6.9
Precipitation
.01 inches or more 7.2 6.3 7.2 6.1 6.3 6.1 3.5 4.0 4.0 5.4 8.7 8.9 75.0
.10 inches or more 3.3 1.6 2.6 2.3 3.1 3.2 1.6 2.0 1.5 2.5 3.7 3.6 30.2
.50 inches or more .4 .0 .0 .1 .4 .3 .2 .4 .2 .1 .6 .2 2.7
1.00 inches or more .1 .0 .0 .0 .0 .0 .0 .1 .0 .0 .1 .1 .4
Degree Days
Heating days @ 65F 1172 933 922 739 543 301 143 165 353 614 919 1153 7941
Growing days @ 50F 0 0 0 14 70 200 372 344 157 39 1 0 1198
Oregon Climate Service