Monthly Means and Extremes
Idleyld Park, Oregon Period: 1961-1990
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature (F)
Maximum 46.4 52.4 56.4 62.0 69.0 75.8 82.6 82.4 76.6 65.5 52.0 45.7 63.7
Minimum 31.9 33.6 35.0 37.0 41.0 46.4 48.4 48.1 44.5 40.0 36.9 32.7 39.6
Mean 39.2 43.0 45.7 49.5 55.0 61.1 65.5 65.3 60.5 52.8 44.5 39.2 51.6
Extreme Temperature (F)
Maximum 70 77 80 87 95 100 103 104 102 96 76 66 104
Minimum 2 6 16 24 27 31 34 34 26 21 13 -1 -1
Precipitation (inches)
Monthly mean 9.24 7.20 7.12 4.61 2.96 1.72 .61 .97 2.34 4.88 10.78 10.47 63.54
Extreme 24 hour 3.55 3.42 5.03 2.16 1.89 1.90 2.26 1.35 2.40 2.92 6.72 4.36 6.72
Snowfall (inches)
Monthly mean 7.83 3.94 2.74 .62 .02 .00 .00 .00 .00 .03 1.11 5.82 23.12
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .0 .5 1.8 5.8 5.5 2.3 .2 .0 .0 15.9
Maximum 32 or less .2 .1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .5 .7
Minimum 32 or less 17.7 13.5 12.1 7.2 2.7 .1 .0 .0 .9 4.1 8.5 15.7 83.3
Minimum 0 or less .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .1 .0
Precipitation
.01 inches or more 16.4 15.1 16.9 14.7 10.3 7.1 2.5 3.3 6.5 10.7 17.8 17.6 139.7
.10 inches or more 13.8 12.4 13.7 10.7 7.4 4.4 1.4 2.1 4.6 8.1 15.2 15.3 109.1
.50 inches or more 6.6 5.2 5.2 3.3 1.8 1.1 .3 .6 1.7 3.9 7.7 7.5 45.2
1.00 inches or more 2.4 1.6 1.4 .5 .2 .2 .1 .2 .6 1.1 3.1 3.0 14.8
Degree Days
Heating days @ 65F 801 622 599 465 315 142 52 50 151 380 616 800 5029
Growing days @ 50F 3 6 18 64 174 334 479 473 318 118 14 2 1994
Oregon Climate Service