Weather on December 21

Hillsboro, OR

55 Years of Data

Avg High
44°F
Avg Low
33°F
Warmest
1972
55°F avg
Coldest
1990
13°F avg

About This Date

December 21st in Hillsboro, OR typically brings chilly winter weather, with average highs around 44°F and lows near 33°F. Over 55 years of records, the warmest December 21st was in 1972 (55°F average), while the coldest was 1990 (13°F) — a 42°F range across recorded history. Precipitation has occurred on 67% of recorded December 21st dates, with snow falling 2% of the time (heaviest snowfall: 1.8"). The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.

The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.

Planning for December 21st in Hillsboro, OR? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.

YearHighLowAvgPrecipSnow
202544°36°40°0.13"
202454°40°47°0.38"
202341°35°38°
202241°24°33°
202142°33°38°0.3"
202059°41°50°0.71"
201951°44°48°1.55"
201846°29°38°
201736°23°30°
201636°27°32°
201550°40°45°2.03"
201457°49°53°0.05"
201349°39°44°0.08"
201246°29°38°0.3"
201142°26°34°
201047°36°41°
200952°32°42°0.56"
200825°22°24°
200741°29°35°
200650°32°41°0.43"
200554°38°46°2.44"
200442°28°35°0.18"
200351°36°43°0.05"
200247°41°44°0.28"
200141°36°38°0.61"
200047°32°39°1.3"
199959°32°46°
199822°10°16°0.23"
199739°31°35°0.05"
199642°35°39°1.14"
199550°34°42°
199451°41°46°0.05"
199343°26°34°
199246°38°42°0.58"
199144°31°37°0.86"
1990coldest18°13°
198937°33°35°
198844°38°41°0.91"
198740°31°35°0.53"
198640°29°34°0.1"
198540°21°30°
198431°18°24°0.53"1.8"
198328°16°22°
198249°43°46°0.74"
198145°36°40°0.84"
198046°40°43°2.01"
197951°45°48°2.03"
197843°33°38°0.2"
197747°33°40°
197637°30°34°
197542°27°34°0.28"
197454°36°45°1.93"
197356°43°49°0.51"
1972warmest59°52°55°4.75"
197143°38°40°3.18"
55 years of data from HILLSBORO

Browse Weather History

Weather data provided by NOAA Climate Data Online. Not for critical planning.