Weather on March 18 at North Cascades
North Cascades National Park
Based on 56 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
March 18th in North Cascades National Park (via Seattle, WA) typically brings cool spring weather, with average highs around 56°F and lows near 40°F. Over 56 years of records, the warmest March 18th was in 2019 (57°F average), while the coldest was 2012 (37°F) — a 20°F range across recorded history. Rain or other precipitation has occurred on about 52% of March 18th dates historically, with the wettest March 18th recording 5.33" of rain. The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.8°F warmer on this date compared to 20-30 years ago.
Planning for March 18th 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 |
|---|---|---|---|---|
| 2026 | 59°F | 51°F | 0.25" | -- |
| 2025 | 51°F | 33°F | 0" | -- |
| 2024 | 65°F | 45°F | 0" | -- |
| 2023 | 65°F | 38°F | 0" | -- |
| 2022 | 56°F | 43°F | 0.3" | -- |
| 2021 | 54°F | 38°F | 0.3" | -- |
| 2020 | 58°F | 32°F | 0" | -- |
| 2019 | 75°F | 40°F | 0" | -- |
| 2018 | 55°F | 38°F | 0" | -- |
| 2017 | 57°F | 36°F | 1.19" | -- |
| 2016 | 63°F | 41°F | 0" | -- |
| 2015 | 63°F | 46°F | 0" | -- |
| 2014 | 52°F | 41°F | 0.03" | -- |
| 2013 | 54°F | 40°F | 0" | -- |
| 2012 | 42°F | 32°F | 0.2" | -- |
| 2011 | 52°F | 38°F | 0.46" | -- |
| 2010 | 53°F | 34°F | 0" | -- |
| 2009 | 54°F | 39°F | 0" | -- |
| 2008 | 51°F | 39°F | 0" | -- |
| 2007 | 61°F | 50°F | 0.03" | -- |
| 2006 | 49°F | 39°F | 0.43" | -- |
| 2005 | 52°F | 38°F | 0" | -- |
| 2004 | 53°F | 39°F | 0.23" | -- |
| 2003 | 54°F | 39°F | 0.3" | -- |
| 2002 | 43°F | 35°F | 0.43" | -- |
| 2001 | 55°F | 47°F | 1.14" | -- |
| 2000 | 51°F | 42°F | 0.46" | -- |
| 1999 | 52°F | 42°F | 0.1" | -- |
| 1998 | 62°F | 39°F | 0" | 0" |
| 1997 | 56°F | 46°F | 5.33" | 0" |
| 1996 | 71°F | 37°F | 0" | 0" |
| 1995 | 57°F | 48°F | 0.69" | 0" |
| 1994 | 51°F | 40°F | 0.23" | 0" |
| 1993 | 50°F | 42°F | 0.2" | 0" |
| 1992 | 57°F | 39°F | 0" | 0" |
| 1991 | 56°F | 36°F | 0.71" | 0" |
| 1990 | 59°F | 42°F | 0" | 0" |
| 1989 | 50°F | 42°F | 1.02" | 0" |
| 1988 | 68°F | 37°F | 0" | 0" |
| 1987 | 52°F | 43°F | 0.43" | 0" |
| 1986 | 57°F | 45°F | 0.33" | 0" |
| 1985 | 50°F | 46°F | 0" | 0" |
| 1984 | 56°F | 45°F | 0.05" | 0" |
| 1983 | 62°F | 38°F | 0" | 0" |
| 1982 | 54°F | 34°F | 0" | 0" |
| 1981 | 65°F | 37°F | 0" | 0" |
| 1980 | 50°F | 39°F | 0.03" | 0" |
| 1979 | 58°F | 42°F | 0" | 0" |
| 1978 | 64°F | 40°F | 0" | 0" |
| 1977 | 54°F | 43°F | 0" | 0" |
| 1976 | 53°F | 42°F | 0.33" | 0" |
| 1975 | 50°F | 42°F | 0.33" | 0" |
| 1974 | 54°F | 35°F | 0" | 0" |
| 1973 | 54°F | 36°F | 1.02" | 0" |
| 1972 | 56°F | 47°F | 0.05" | 0" |
| 1971 | 52°F | 33°F | 0" | 0" |