Weather on September 12 at Acadia
Acadia National Park
Based on 54 years of data from Bar Harbor, ME
Planning Your Visit
September 12th in Acadia National Park (via Bar Harbor, ME) typically brings pleasant fall weather, with average highs around 71°F and lows near 52°F. Over 54 years of records, the warmest September 12th was in 2022 (73°F average), while the coldest was 1985 (48°F) — a 25°F range across recorded history. Rain or other precipitation has occurred on about 22% of September 12th dates historically, with the wettest September 12th recording 3.61" of rain. The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
The last decade has been 1.3°F warmer on this date compared to 20-30 years ago.
Planning for September 12th in Acadia? Great weather for outdoor activities.
Year by Year History
| Year | High | Low | Precip | Snow |
|---|---|---|---|---|
| 2025 | 71°F | 50°F | -- | -- |
| 2024 | 78°F | 54°F | -- | -- |
| 2023 | 64°F | 61°F | -- | -- |
| 2022 | 83°F | 64°F | -- | -- |
| 2021 | 72°F | 60°F | -- | -- |
| 2020 | 68°F | 48°F | -- | -- |
| 2019 | 61°F | 50°F | -- | -- |
| 2018 | 73°F | 60°F | -- | -- |
| 2017 | 79°F | 56°F | -- | -- |
| 2016 | 73°F | 48°F | -- | -- |
| 2015 | 73°F | 55°F | -- | -- |
| 2014 | 65°F | 48°F | -- | -- |
| 2013 | 78°F | 63°F | -- | -- |
| 2012 | 73°F | 54°F | 0" | -- |
| 2011 | 76°F | 54°F | 0" | -- |
| 2010 | 68°F | 45°F | 0" | 0" |
| 2009 | 66°F | 52°F | 0" | 0" |
| 2008 | 65°F | 50°F | 0" | 0" |
| 2007 | 67°F | 55°F | 1.88" | 0" |
| 2006 | 67°F | 46°F | 0" | 0" |
| 2005 | 84°F | 58°F | 0" | 0" |
| 2004 | 73°F | 55°F | 0" | 0" |
| 2003 | 71°F | 48°F | 0" | 0" |
| 2002 | 65°F | 46°F | -- | -- |
| 2001 | 81°F | 51°F | 0" | 0" |
| 1999 | 78°F | 53°F | 0" | 0" |
| 1998 | 69°F | 49°F | 0" | 0" |
| 1997 | 65°F | 53°F | 0.76" | 0" |
| 1996 | 69°F | 53°F | 0" | 0" |
| 1995 | 74°F | 49°F | 0" | 0" |
| 1994 | 70°F | 48°F | 0.1" | 0" |
| 1993 | 64°F | 38°F | 0" | 0" |
| 1992 | 67°F | 46°F | 0" | 0" |
| 1991 | 65°F | 41°F | 0" | 0" |
| 1990 | 72°F | 52°F | 0.18" | 0" |
| 1989 | 88°F | 54°F | 0" | 0" |
| 1988 | 66°F | 44°F | 0" | 0" |
| 1987 | 64°F | 55°F | 0.03" | 0" |
| 1986 | 70°F | 46°F | 0" | 0" |
| 1985 | 61°F | 36°F | 0" | 0" |
| 1984 | 76°F | 51°F | 0.25" | 0" |
| 1983 | 78°F | 59°F | 0" | 0" |
| 1982 | 80°F | 48°F | 3.61" | 0" |
| 1981 | 67°F | 52°F | 0" | 0" |
| 1980 | 69°F | 39°F | 0" | 0" |
| 1979 | 70°F | 46°F | 0" | 0" |
| 1978 | 63°F | 53°F | 1.04" | 0" |
| 1977 | 70°F | 55°F | 0.2" | 0" |
| 1976 | 66°F | 51°F | 0" | 0" |
| 1975 | 65°F | 54°F | 1.02" | 0" |
| 1974 | 73°F | 66°F | 0" | 0" |
| 1973 | 68°F | 52°F | 0" | 0" |
| 1972 | 75°F | 56°F | 0.05" | 0" |
| 1971 | 66°F | 54°F | 1.57" | 0" |