Monthly Means and Extremes Period: 1971-2000
Prospect 2 SW, OR
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature(F)
Maximum 47.5 51.9 56.1 61.9 69.4 77.6 86.3 86.8 81.0 69.3 52.0 46.1 65.5
Minimum 28.9 30.4 32.0 34.5 39.2 44.4 48.6 47.8 42.6 36.9 32.9 29.0 37.3
Mean 38.2 41.2 44.1 48.2 54.3 61.0 67.5 67.3 61.8 53.1 42.5 37.6 51.4
Extreme Temperature(F)
Maximum 66 76 79 89 102 103 106 110 106 98 75 71 110
Minimum 5 0 5 20 26 28 33 33 27 14 8 -8 -8
Precipitation(inches)
Monthly mean 6.08 5.03 4.71 3.19 2.61 1.15 .64 .87 1.43 3.02 6.70 6.80 42.23
Extreme 24 hr 3.40 2.41 3.23 1.87 1.54 1.31 1.50 1.42 2.38 1.88 4.31 2.68 4.31
Snowfall(inches)
Monthly mean 8.44 6.87 4.64 1.79 .07 .00 .00 .00 .07 .30 2.72 7.73 33.21
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .0 1.0 3.4 11.7 12.1 6.8 1.1 .0 .0 36.1
Maximum 32 or less .2 .1 .0 .0 .0 .0 .0 .0 .0 .0 .0 .6 .9
Minimum 32 or less 21.8 18.3 18.2 12.6 5.6 .7 .0 .0 1.5 8.0 15.2 22.0 123.8
Minimum 0 or less .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .0 .2 .2
Precipitation
.01 inches or more 15.6 15.5 17.0 13.6 10.6 5.9 2.8 3.3 5.2 8.9 17.5 16.4 132.3
.10 inches or more 11.5 11.3 10.7 8.6 6.5 3.3 1.5 2.0 3.3 6.1 12.7 12.3 89.9
.50 inches or more 3.9 3.3 2.8 1.6 1.9 .7 .3 .6 .9 2.4 4.6 4.8 27.8
1.00 inches or more 1.3 .9 .7 .2 .2 .1 .1 .2 .3 .7 1.3 1.8 7.9
Degree Days
Heating days @ 65 (F) 831 673 650 506 340 157 47 42 132 378 677 850 5279
Growing days @ 50 (F) 1 4 12 59 171 333 540 534 365 141 9 1 2172