Weather on September 30 at North Cascades
North Cascades National Park
Based on 54 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
September 30th in North Cascades National Park (via Seattle, WA) typically brings mild fall weather, with average highs around 66°F and lows near 51°F. Over 54 years of records, the warmest September 30th was in 1994 (67°F average), while the coldest was 2019 (50°F) — a 17°F range across recorded history. Rain or other precipitation has occurred on about 26% of September 30th dates historically, with the wettest September 30th recording 2.69" 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 September 30th in North Cascades? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 71°F | 51°F | 0.38" | -- |
| 2024 | 67°F | 48°F | 0" | -- |
| 2023 | 61°F | 48°F | 0" | -- |
| 2022 | 69°F | 55°F | 0" | -- |
| 2021 | 64°F | 55°F | 0.48" | -- |
| 2020 | 75°F | 54°F | 0" | -- |
| 2019 | 60°F | 40°F | 0" | -- |
| 2018 | 65°F | 56°F | 0" | -- |
| 2017 | 65°F | 54°F | 0.08" | -- |
| 2016 | 67°F | 46°F | 0" | -- |
| 2015 | 68°F | 52°F | 0" | -- |
| 2014 | 69°F | 55°F | 0" | -- |
| 2013 | 60°F | 50°F | 1.57" | -- |
| 2012 | 67°F | 47°F | 0" | -- |
| 2011 | 65°F | 53°F | 0.05" | -- |
| 2010 | 69°F | 54°F | 0" | -- |
| 2009 | 61°F | 42°F | 0" | -- |
| 2008 | 70°F | 51°F | 0" | -- |
| 2007 | 55°F | 50°F | 2.69" | -- |
| 2006 | 61°F | 51°F | 0" | -- |
| 2005 | 62°F | 53°F | 0.15" | -- |
| 2004 | 64°F | 52°F | 0" | -- |
| 2003 | 71°F | 57°F | 0" | -- |
| 2002 | 60°F | 43°F | 0" | -- |
| 2001 | 65°F | 55°F | 0" | -- |
| 2000 | 63°F | 56°F | 0.64" | -- |
| 1999 | 61°F | 45°F | 0" | -- |
| 1997 | 64°F | 58°F | 0.18" | 0" |
| 1996 | 69°F | 50°F | 0" | 0" |
| 1995 | 61°F | 50°F | 0.84" | 0" |
| 1994 | 73°F | 61°F | 0" | 0" |
| 1993 | 74°F | 52°F | 0" | 0" |
| 1992 | 78°F | 53°F | 0" | 0" |
| 1991 | 71°F | 51°F | 0" | 0" |
| 1990 | 67°F | 48°F | 0" | 0" |
| 1989 | 61°F | 56°F | 0.05" | 0" |
| 1988 | 71°F | 54°F | 0" | 0" |
| 1987 | 75°F | 50°F | 0" | 0" |
| 1986 | 61°F | 50°F | 0.13" | 0" |
| 1985 | 68°F | 43°F | 0" | 0" |
| 1984 | 64°F | 52°F | 0" | 0" |
| 1983 | 65°F | 44°F | 0" | 0" |
| 1982 | 65°F | 48°F | 0" | 0" |
| 1981 | 64°F | 52°F | 0.1" | 0" |
| 1980 | 68°F | 53°F | 0" | 0" |
| 1979 | 68°F | 52°F | 0" | 0" |
| 1978 | 67°F | 54°F | 0.18" | 0" |
| 1977 | 60°F | 49°F | 0" | 0" |
| 1976 | 65°F | 52°F | 0" | 0" |
| 1975 | 76°F | 50°F | 0" | 0" |
| 1974 | 69°F | 47°F | 0" | 0" |
| 1973 | 62°F | 49°F | 0" | 0" |
| 1972 | 64°F | 48°F | 0" | 0" |
| 1971 | 63°F | 50°F | 0" | 0" |