Records for Hillsboro Area, Oregon (HIOthr) on 12-31
Record Highs
-
1: 62°F (1980)
-
2: 58°F (1996)
-
3: 56°F (1961)
Record Lows
-
1: 8°F (1968)
-
2: 14°F (1978)
-
3: 15°F (1990)
Lowest Highs
-
1: 48°F (1996)
-
2: 46°F (1980)
-
3: 45°F (2020)
Highest Lows
-
1: 21°F (1978)
-
2: 28°F (1968)
-
3: 30°F (1990)
Highest December temperature:
64°F on 12-01-1951.
Lowest December temperature:
-2°F on 12-08-1972.
Average temperature is 39.5°F
Average high is 45.8°F
Average low is 33.1°F
Temperature data from 1929 to 2022.
Record Precipitation
-
1: 1.56" (1996)
-
2: 0.91" (1968)
-
3: 0.80" (2009)
Precipitation data from 1929 to 2022.