Weather on May 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
May 21st in North Cascades National Park (via Seattle, WA) typically brings mild spring weather, with average highs around 65°F and lows near 49°F. Over 55 years of records, the warmest May 21st was in 2015 (69°F average), while the coldest was 1996 (48°F) — a 21°F range across recorded history. Rain or other precipitation has occurred on about 33% of May 21st dates historically, with the wettest May 21st recording 1.3" 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 May 21st in North Cascades? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 63°F | 50°F | 0" | -- |
| 2024 | 54°F | 49°F | 1.22" | -- |
| 2023 | 62°F | 52°F | 0" | -- |
| 2022 | 66°F | 44°F | 0" | -- |
| 2021 | 63°F | 46°F | 0" | -- |
| 2020 | 58°F | 47°F | 0.43" | -- |
| 2019 | 62°F | 51°F | 0" | -- |
| 2018 | 70°F | 54°F | 0" | -- |
| 2017 | 75°F | 53°F | 0" | -- |
| 2016 | 59°F | 52°F | 0.1" | -- |
| 2015 | 81°F | 58°F | 0" | -- |
| 2014 | 69°F | 55°F | 0" | -- |
| 2013 | 61°F | 48°F | 1.09" | -- |
| 2012 | 63°F | 51°F | 1.04" | -- |
| 2011 | 56°F | 50°F | 0.25" | -- |
| 2010 | 57°F | 47°F | 0.1" | -- |
| 2009 | 65°F | 45°F | 0" | -- |
| 2008 | 61°F | 48°F | 0.3" | -- |
| 2007 | 59°F | 45°F | 1.3" | -- |
| 2006 | 69°F | 50°F | 0.1" | -- |
| 2005 | 63°F | 46°F | 0.58" | -- |
| 2004 | 63°F | 53°F | 0" | -- |
| 2003 | 69°F | 53°F | 0" | -- |
| 2002 | 62°F | 50°F | 0.51" | -- |
| 2001 | 74°F | 50°F | 0" | -- |
| 2000 | 69°F | 56°F | 0.28" | -- |
| 1999 | 64°F | 47°F | 0" | -- |
| 1998 | 57°F | 50°F | 0" | 0" |
| 1997 | 66°F | 50°F | 0" | 0" |
| 1996 | 52°F | 44°F | 0.25" | 0" |
| 1995 | 74°F | 51°F | 0" | 0" |
| 1994 | 70°F | 52°F | 0" | 0" |
| 1993 | 64°F | 55°F | 0" | 0" |
| 1992 | 65°F | 44°F | 0" | 0" |
| 1991 | 62°F | 52°F | 0" | 0" |
| 1990 | 71°F | 47°F | 0.53" | 0" |
| 1989 | 61°F | 44°F | 0" | 0" |
| 1988 | 83°F | 49°F | 0" | 0" |
| 1987 | 74°F | 49°F | 0" | 0" |
| 1986 | 59°F | 45°F | 0.74" | 0" |
| 1985 | 73°F | 47°F | 0" | 0" |
| 1984 | 60°F | 46°F | 0" | 0" |
| 1983 | 70°F | 53°F | 0" | 0" |
| 1982 | 72°F | 50°F | 0" | 0" |
| 1981 | 59°F | 51°F | 0" | 0" |
| 1980 | 61°F | 48°F | 0.56" | 0" |
| 1979 | 73°F | 49°F | 0" | 0" |
| 1978 | 60°F | 47°F | 0" | 0" |
| 1977 | 62°F | 49°F | 0" | 0" |
| 1976 | 69°F | 46°F | 0" | 0" |
| 1975 | 60°F | 46°F | 0.03" | 0" |
| 1974 | 67°F | 45°F | 0" | 0" |
| 1973 | 69°F | 45°F | 0" | 0" |
| 1972 | 59°F | 53°F | 0" | 0" |
| 1971 | 68°F | 44°F | 0" | 0" |