Weather on December 21 at North Cascades
North Cascades National Park
Based on 55 years of data from Seattle, WA
Elevation Note: North Cascades sits at 4,200 ft. Expect temperatures 15°F cooler than the data shown below, which comes from Seattle, WA at a lower elevation.
Planning Your Visit
December 21st in North Cascades National Park (via Seattle, WA) typically brings chilly winter weather, with average highs around 47°F and lows near 36°F. Over 55 years of records, the warmest December 21st was in 2014 (55°F average), while the coldest was 1990 (15°F) — a 40°F range across recorded history. Rain or other precipitation has occurred on about 56% of December 21st dates historically, with the wettest December 21st recording 4.52" of rain. Temperatures on this date have remained relatively stable over the past several decades.
Temperatures on this date have remained relatively stable over the past several decades.
Planning for December 21st in North Cascades? Bring layers as temperatures can vary throughout the day. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 50°F | 41°F | 0.53" | -- |
| 2024 | 54°F | 41°F | 0.79" | -- |
| 2023 | 51°F | 40°F | 0" | -- |
| 2022 | 30°F | 21°F | 0" | -- |
| 2021 | 42°F | 36°F | 0.33" | -- |
| 2020 | 56°F | 32°F | 4.52" | -- |
| 2019 | 53°F | 43°F | 0.43" | -- |
| 2018 | 43°F | 33°F | 0" | -- |
| 2017 | 41°F | 27°F | 0" | -- |
| 2016 | 49°F | 34°F | 0" | -- |
| 2015 | 45°F | 39°F | 2.11" | -- |
| 2014 | 58°F | 52°F | 0" | -- |
| 2013 | 48°F | 42°F | 0.56" | -- |
| 2012 | 47°F | 30°F | 0.18" | -- |
| 2011 | 46°F | 30°F | 0" | -- |
| 2010 | 53°F | 39°F | 0.1" | -- |
| 2009 | 53°F | 40°F | 1.24" | -- |
| 2008 | 32°F | 25°F | 0.23" | -- |
| 2007 | 43°F | 29°F | 0" | -- |
| 2006 | 51°F | 39°F | 0.84" | -- |
| 2005 | 52°F | 45°F | 1.12" | -- |
| 2004 | 47°F | 34°F | 0" | -- |
| 2003 | 53°F | 38°F | 0.13" | -- |
| 2002 | 47°F | 40°F | 0" | -- |
| 2001 | 47°F | 32°F | 0" | -- |
| 2000 | 49°F | 38°F | 0.28" | -- |
| 1999 | 48°F | 39°F | 0" | -- |
| 1998 | 27°F | 18°F | 0" | -- |
| 1997 | 44°F | 33°F | 0" | 0" |
| 1996 | 42°F | 36°F | 0.76" | 0" |
| 1995 | 55°F | 33°F | 0" | 0" |
| 1994 | 52°F | 39°F | 0.05" | 0" |
| 1993 | 44°F | 34°F | 0" | 0" |
| 1992 | 48°F | 42°F | 0" | 0" |
| 1991 | 45°F | 40°F | 0" | 0" |
| 1990 | 21°F | 9°F | 0" | 0" |
| 1989 | 50°F | 42°F | 0" | 0" |
| 1988 | 44°F | 35°F | 0" | 0" |
| 1987 | 46°F | 36°F | 0.15" | 0" |
| 1986 | 53°F | 43°F | 0.91" | 0" |
| 1985 | 43°F | 33°F | 0" | 0" |
| 1984 | 46°F | 36°F | 0.15" | 0" |
| 1983 | 26°F | 16°F | 0" | 0" |
| 1982 | 51°F | 42°F | 1.07" | 0" |
| 1981 | 43°F | 34°F | 0.1" | 0" |
| 1980 | 50°F | 47°F | 1.8" | 0" |
| 1979 | 47°F | 39°F | 2.21" | 0" |
| 1978 | 46°F | 42°F | 0" | 0" |
| 1977 | 46°F | 35°F | 0.03" | 0" |
| 1976 | 49°F | 42°F | 0.05" | 0" |
| 1975 | 51°F | 31°F | 0.3" | 0" |
| 1974 | 55°F | 36°F | 0.66" | 0" |
| 1973 | 49°F | 42°F | 0.33" | 0" |
| 1972 | 56°F | 48°F | 1.7" | 0" |
| 1971 | 41°F | 37°F | 0.58" | 0" |