Monthly Means and Extremes
Squaw Butte Exp. Station, Oregon Period: 1961-1990
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature (F)
Maximum 35.2 41.4 46.6 55.7 64.0 74.1 83.0 82.5 73.1 61.8 45.8 36.9 58.5
Minimum 17.6 22.6 25.3 29.6 35.9 44.1 50.1 49.8 42.3 34.4 26.6 20.4 33.3
Mean 26.3 32.0 35.9 42.7 49.9 59.1 66.4 66.1 57.7 48.0 36.1 28.4 45.9
Extreme Temperature (F)
Maximum 55 64 74 86 92 96 99 104 95 87 72 59 104
Minimum -17 -16 -2 11 16 23 30 30 19 7 -3 -20 -20
Precipitation (inches)
Monthly mean 1.22 .71 .86 .71 1.10 .91 .40 .73 .65 .77 1.25 1.27 10.73
Extreme 24 hour 1.23 1.31 .78 1.27 1.00 1.36 1.04 2.02 1.07 2.00 .85 2.05 2.05
Snowfall (inches)
Monthly mean 11.48 4.64 4.85 1.64 .52 .02 .00 .00 .00 .84 5.16 11.04 42.25
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .0 .1 1.9 7.1 7.4 .9 .0 .0 .0 18.5
Maximum 32 or less 10.1 3.1 1.3 .0 .0 .0 .0 .0 .0 .1 2.1 8.7 22.4
Minimum 32 or less 28.7 25.5 26.2 19.7 11.4 2.4 .5 .3 3.9 12.5 23.1 27.4 182.3
Minimum 0 or less 1.7 .6 .0 .0 .0 .0 .0 .0 .0 .0 .0 1.0 4.4
Precipitation
.01 inches or more 8.0 6.4 7.5 5.3 6.7 5.6 2.7 3.9 3.6 4.9 8.0 6.9 68.6
.10 inches or more 4.3 3.2 3.2 2.8 3.8 3.0 1.3 2.0 1.8 2.3 4.5 3.3 36.0
.50 inches or more .4 .1 .2 .3 .5 .3 .1 .3 .4 .2 .5 .7 4.1
1.00 inches or more .1 .0 .0 .0 .0 .1 .0 .1 .0 .1 .0 .1 .5
Degree Days
Heating days @ 65F 1201 930 901 671 472 213 71 80 245 529 867 1135 7302
Growing days @ 50F 0 0 2 31 109 293 511 502 265 82 3 0 1826
Oregon Climate Service