Weather on September 21 at Glacier Bay
Glacier Bay National Park and Preserve
Based on 55 years of data from Juneau, AK
Planning Your Visit
September 21st in Glacier Bay National Park (via Juneau, AK) typically brings cool fall weather, with average highs around 55°F and lows near 44°F. Over 55 years of records, the warmest September 21st was in 1995 (60°F average), while the coldest was 2000 (44°F) — a 16°F range across recorded history. Rain or other precipitation has occurred on about 80% of September 21st dates historically, with the wettest September 21st recording 5.84" of rain. The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
The last decade has been 2.0°F warmer on this date compared to 20-30 years ago.
Planning for September 21st in Glacier Bay? 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 |
|---|---|---|---|---|
| 2025 | 52°F | 48°F | 1.98" | 0" |
| 2024 | 49°F | 47°F | 2.39" | 0" |
| 2023 | 55°F | 50°F | 5.08" | 0" |
| 2022 | 57°F | 51°F | 2.13" | 0" |
| 2021 | 54°F | 44°F | 2.13" | 0" |
| 2020 | 56°F | 48°F | 0.1" | 0" |
| 2019 | 57°F | 49°F | 1.14" | 0" |
| 2018 | 60°F | 30°F | 0" | 0" |
| 2017 | 56°F | 39°F | 0.71" | 0" |
| 2016 | 59°F | 44°F | 0" | 0" |
| 2015 | 48°F | 39°F | 0.46" | 0" |
| 2014 | 59°F | 49°F | 2.51" | 0" |
| 2013 | 51°F | 47°F | 1.07" | 0" |
| 2012 | 61°F | 45°F | 0" | 0" |
| 2011 | 53°F | 48°F | 3.4" | 0" |
| 2010 | 61°F | 31°F | 0" | 0" |
| 2009 | 54°F | 45°F | 1.55" | 0" |
| 2008 | 51°F | 43°F | 0.48" | 0" |
| 2007 | 50°F | 45°F | 1.19" | 0" |
| 2006 | 54°F | 47°F | 0.48" | 0" |
| 2005 | 55°F | 45°F | 0.05" | 0" |
| 2004 | 55°F | 48°F | 1.07" | 0" |
| 2003 | 48°F | 40°F | 0.79" | 0" |
| 2002 | 55°F | 37°F | 1.68" | 0" |
| 2001 | 52°F | 43°F | 0.84" | 0" |
| 2000 | 55°F | 32°F | 0" | 0" |
| 1999 | 56°F | 49°F | 0.69" | 0" |
| 1998 | 59°F | 47°F | 0.05" | 0" |
| 1997 | 53°F | 47°F | 1.4" | 0" |
| 1996 | 49°F | 41°F | 0.43" | 0" |
| 1995 | 67°F | 54°F | 0.46" | 0" |
| 1994 | 59°F | 49°F | 5.84" | 0" |
| 1993 | 52°F | 48°F | 1.85" | 0" |
| 1992 | 52°F | 44°F | 0.03" | 0" |
| 1991 | 53°F | 46°F | 0.51" | 0" |
| 1990 | 57°F | 54°F | 2.67" | 0" |
| 1989 | 58°F | 48°F | 1.02" | 0" |
| 1988 | 51°F | 44°F | 0.2" | 0" |
| 1987 | 52°F | 44°F | 0.28" | 0" |
| 1986 | 55°F | 50°F | 0.53" | 0" |
| 1985 | 53°F | 40°F | 0.08" | 0" |
| 1984 | 60°F | 39°F | 0" | 0" |
| 1983 | 58°F | 51°F | 0.69" | 0" |
| 1982 | 56°F | 38°F | 0" | 0" |
| 1981 | 57°F | 35°F | 0" | 0" |
| 1980 | 50°F | 39°F | 1.3" | 0" |
| 1979 | 50°F | 39°F | 0.28" | 0" |
| 1978 | 53°F | 41°F | 0.23" | 0" |
| 1977 | 53°F | 50°F | 3.25" | 0" |
| 1976 | 56°F | 41°F | 1.07" | 0" |
| 1975 | 61°F | 40°F | 0" | 0" |
| 1974 | 60°F | 39°F | 0" | 0" |
| 1973 | 54°F | 42°F | 1.35" | 0" |
| 1972 | 53°F | 38°F | 0" | 0" |
| 1971 | 58°F | 48°F | 0.46" | 0" |