Weather on September 27 at Mount Rainier
Mount Rainier National Park
Based on 54 years of data from Seattle, WA
Elevation Note: Mount Rainier sits at 5,400 ft. Expect temperatures 19°F cooler than the data shown below, which comes from Seattle, WA at a lower elevation.
Planning Your Visit
September 27th in Mount Rainier National Park (via Seattle, WA) typically brings mild fall weather, with average highs around 68°F and lows near 52°F. Over 54 years of records, the warmest September 27th was in 2010 (71°F average), while the coldest was 1972 (46°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 31% of September 27th dates historically, with the wettest September 27th recording 1.73" of rain. The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.6°F warmer on this date compared to 20-30 years ago.
Planning for September 27th in Mount Rainier? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 75°F | 57°F | 0" | -- |
| 2024 | 69°F | 55°F | 0" | -- |
| 2023 | 59°F | 52°F | 1.3" | -- |
| 2022 | 78°F | 53°F | 0" | -- |
| 2021 | 62°F | 52°F | 0.84" | -- |
| 2020 | 68°F | 52°F | 0" | -- |
| 2019 | 65°F | 48°F | 0.08" | -- |
| 2018 | 72°F | 51°F | 0" | -- |
| 2017 | 77°F | 57°F | 0" | -- |
| 2016 | 69°F | 57°F | 0" | -- |
| 2015 | 65°F | 46°F | 0" | -- |
| 2014 | 70°F | 56°F | 0" | -- |
| 2013 | 59°F | 52°F | 0.13" | -- |
| 2012 | 71°F | 51°F | 0" | -- |
| 2011 | 66°F | 51°F | 0.1" | -- |
| 2010 | 78°F | 64°F | 0.1" | -- |
| 2009 | 65°F | 51°F | 0" | -- |
| 2008 | 67°F | 51°F | 0" | -- |
| 2007 | 67°F | 49°F | 0.58" | -- |
| 2006 | 78°F | 55°F | 0" | -- |
| 2005 | 67°F | 53°F | 0" | -- |
| 2004 | 69°F | 53°F | 0" | -- |
| 2003 | 79°F | 59°F | 0" | -- |
| 2002 | 70°F | 49°F | 0" | -- |
| 2001 | 60°F | 45°F | 0.03" | -- |
| 2000 | 77°F | 47°F | 0" | -- |
| 1999 | 61°F | 43°F | 0" | -- |
| 1997 | 63°F | 56°F | 0.36" | 0" |
| 1996 | 77°F | 49°F | 0" | 0" |
| 1995 | 65°F | 57°F | 1.65" | 0" |
| 1994 | 78°F | 52°F | 0" | 0" |
| 1993 | 77°F | 50°F | 0" | 0" |
| 1992 | 63°F | 43°F | 0" | 0" |
| 1991 | 62°F | 56°F | 0" | 0" |
| 1990 | 72°F | 55°F | 0" | 0" |
| 1989 | 68°F | 55°F | 0.03" | 0" |
| 1988 | 63°F | 53°F | 0.03" | 0" |
| 1987 | 66°F | 45°F | 0" | 0" |
| 1986 | 61°F | 55°F | 0.1" | 0" |
| 1985 | 70°F | 48°F | 0" | 0" |
| 1984 | 69°F | 47°F | 0" | 0" |
| 1983 | 60°F | 44°F | 0.3" | 0" |
| 1982 | 62°F | 49°F | 0.1" | 0" |
| 1981 | 66°F | 54°F | 1.73" | 0" |
| 1980 | 63°F | 55°F | 0" | 0" |
| 1979 | 68°F | 58°F | 0.03" | 0" |
| 1978 | 68°F | 57°F | 0" | 0" |
| 1977 | 63°F | 48°F | 0" | 0" |
| 1976 | 74°F | 57°F | 0" | 0" |
| 1975 | 74°F | 50°F | 0" | 0" |
| 1974 | 65°F | 48°F | 0" | 0" |
| 1973 | 73°F | 51°F | 0" | 0" |
| 1972 | 53°F | 40°F | 0" | 0" |
| 1971 | 59°F | 52°F | 0" | 0" |