Monthly Means and Extremes Period: 1971-2000
Fossil, OR
Parameter Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec Year
Mean Temperature(F)
Maximum 41.3 45.7 51.8 58.4 66.2 74.0 83.4 83.5 75.1 63.7 47.6 40.9 61.0
Minimum 28.1 29.4 31.9 34.7 39.0 44.2 47.4 47.7 42.7 37.1 33.3 29.0 37.0
Mean 34.7 37.6 41.9 46.6 52.6 59.1 65.4 65.6 58.9 50.4 40.5 35.0 49.0
Extreme Temperature(F)
Maximum 67 72 78 87 97 101 101 106 97 98 74 67 103
Minimum -19 -22 4 14 20 25 25 31 20 3 -16 -22 -19
Precipitation(inches)
Monthly mean 1.50 1.27 1.49 1.42 1.66 1.11 .55 .72 .79 1.33 1.77 1.57 15.18
Extreme 24 hr 1.50 .98 1.30 1.08 1.86 1.29 1.40 1.56 .98 1.30 1.67 2.95 1.70
Snowfall(inches)
Monthly mean 3.50 1.88 .65 .26 .20 .00 .00 .00 .00 .48 2.17 2.67 14.93
Average number of days
Temperature
Maximum 90 or more .0 .0 .0 .0 .2 1.4 8.4 9.0 1.7 .6 .0 .0 21.2
Maximum 32 or less 6.3 2.3 .2 .0 .0 .0 .0 .0 .0 .0 1.6 5.2 15.8
Minimum 32 or less 23.1 20.0 19.6 15.8 8.8 2.1 .5 .4 4.8 12.1 17.1 23.1 150.2
Minimum 0 or less 1.4 .7 .0 .0 .0 .0 .0 .0 .0 .0 .3 .8 2.4
Precipitation
.01 inches or more 7.3 7.3 8.9 7.8 6.7 5.4 2.9 2.9 3.7 5.8 8.6 7.4 79.9
.10 inches or more 4.3 4.4 5.0 4.6 4.2 3.3 1.5 2.0 2.6 3.6 5.6 4.6 47.3
.50 inches or more .6 .4 .5 .6 1.1 .6 .3 .5 .3 .7 .9 .7 6.5
1.00 inches or more .1 .0 .1 .1 .2 .1 .1 .0 .0 .1 .1 .2 .8
Degree Days
Heating days @ 65 (F) 995 805 738 580 411 221 91 76 228 467 771 970 6365
Growing days @ 50 (F) 2 3 7 36 119 258 447 469 251 99 8 2 1651