Weather on May 18 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 18th in North Cascades National Park (via Seattle, WA) typically brings mild spring weather, with average highs around 65°F and lows near 50°F. Over 55 years of records, the warmest May 18th was in 1993 (69°F average), while the coldest was 1989 (51°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 35% of May 18th dates historically, with the wettest May 18th recording 1.91" 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 18th 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 | 62°F | 47°F | 0" | -- |
| 2024 | 57°F | 48°F | 0.03" | -- |
| 2023 | 77°F | 57°F | 0" | -- |
| 2022 | 59°F | 46°F | 0.18" | -- |
| 2021 | 61°F | 46°F | 0.64" | -- |
| 2020 | 68°F | 53°F | 0" | -- |
| 2019 | 71°F | 51°F | 0" | -- |
| 2018 | 66°F | 53°F | 0" | -- |
| 2017 | 65°F | 48°F | 0" | -- |
| 2016 | 64°F | 52°F | 0" | -- |
| 2015 | 78°F | 56°F | 0" | -- |
| 2014 | 68°F | 54°F | 0.1" | -- |
| 2013 | 63°F | 53°F | 0" | -- |
| 2012 | 60°F | 45°F | 0" | -- |
| 2011 | 66°F | 45°F | 0" | -- |
| 2010 | 65°F | 51°F | 0.46" | -- |
| 2009 | 67°F | 49°F | 1.02" | -- |
| 2008 | 75°F | 53°F | 0" | -- |
| 2007 | 70°F | 47°F | 0" | -- |
| 2006 | 77°F | 55°F | 0" | -- |
| 2005 | 67°F | 52°F | 1.91" | -- |
| 2004 | 74°F | 52°F | 0" | -- |
| 2003 | 62°F | 39°F | 0" | -- |
| 2002 | 66°F | 51°F | 0" | -- |
| 2001 | 63°F | 48°F | 0" | -- |
| 2000 | 66°F | 51°F | 0.99" | -- |
| 1999 | 63°F | 49°F | 0.03" | -- |
| 1998 | 65°F | 48°F | 0.05" | 0" |
| 1997 | 75°F | 50°F | 0" | 0" |
| 1996 | 60°F | 49°F | 0.91" | 0" |
| 1995 | 64°F | 48°F | 0" | 0" |
| 1994 | 69°F | 49°F | 0" | 0" |
| 1993 | 80°F | 57°F | 0" | 0" |
| 1992 | 71°F | 54°F | 0" | 0" |
| 1991 | 56°F | 50°F | 0.25" | 0" |
| 1990 | 61°F | 49°F | 0.05" | 0" |
| 1989 | 57°F | 44°F | 0.08" | 0" |
| 1988 | 61°F | 48°F | 0.15" | 0" |
| 1987 | 60°F | 48°F | 0" | 0" |
| 1986 | 65°F | 55°F | 0.03" | 0" |
| 1985 | 63°F | 52°F | 0" | 0" |
| 1984 | 67°F | 51°F | 0" | 0" |
| 1983 | 64°F | 51°F | 0" | 0" |
| 1982 | 60°F | 46°F | 0.03" | 0" |
| 1981 | 62°F | 53°F | 0.33" | 0" |
| 1980 | 69°F | 49°F | 0" | 0" |
| 1979 | 67°F | 51°F | 0" | 0" |
| 1978 | 68°F | 45°F | 0" | 0" |
| 1977 | 62°F | 48°F | 0" | 0" |
| 1976 | 61°F | 43°F | 0" | 0" |
| 1975 | 59°F | 46°F | 0" | 0" |
| 1974 | 60°F | 48°F | 0" | 0" |
| 1973 | 64°F | 52°F | 0" | 0" |
| 1972 | 61°F | 46°F | 0.23" | 0" |
| 1971 | 62°F | 44°F | 0" | 0" |