Weather on August 21 at Glacier Bay

Glacier Bay National Park and Preserve

AKAlaska
Avg High63°F
Avg Low48°F
Warmest197765°F
Coldest197447°F

Based on 55 years of data from Juneau, AK

Planning Your Visit

August 21st in Glacier Bay National Park (via Juneau, AK) typically brings mild summer weather, with average highs around 63°F and lows near 48°F. Over 55 years of records, the warmest August 21st was in 1977 (65°F average), while the coldest was 1974 (47°F) — a 18°F range across recorded history. Rain or other precipitation has occurred on about 64% of August 21st dates historically, with the wettest August 21st recording 3.48" of rain. The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.

The last decade has been 2.4°F warmer on this date compared to 20-30 years ago.

Planning for August 21st in Glacier Bay? Great weather for outdoor activities. Consider bringing rain gear or an umbrella.

Year by Year History

YearHighLowPrecipSnow
202563°F52°F0"0"
202470°F42°F0"0"
202371°F44°F0"0"
202274°F48°F0"0"
202164°F46°F0"0"
202059°F50°F0.89"0"
201963°F49°F0"0"
201871°F46°F0.76"0"
201760°F53°F0.76"0"
201669°F46°F0"0"
201567°F43°F0.15"0"
201471°F44°F0"0"
201359°F51°F0.18"0"
201258°F52°F0"0"
201156°F52°F1.04"0"
201064°F49°F0.3"0"
200957°F49°F1.37"0"
200857°F52°F1.12"0"
200760°F49°F0.08"0"
200657°F47°F0.91"0"
200559°F52°F1.04"0"
200473°F49°F0"0"
200359°F43°F0.03"0"
200255°F51°F2.13"0"
200169°F50°F0.05"0"
200054°F50°F3.48"0"
199961°F51°F1.22"0"
199853°F46°F0.3"0"
199768°F47°F0.1"0"
199655°F51°F0.58"0"
199574°F48°F0"0"
199456°F53°F1.47"0"
199360°F52°F1.52"0"
199270°F43°F0"0"
199155°F50°F2.01"0"
199065°F49°F0"0"
198966°F49°F0"0"
198857°F51°F0.15"0"
198760°F47°F0.61"0"
198666°F41°F0"0"
198554°F49°F1.83"0"
198463°F49°F0.05"0"
198355°F53°F1.04"0"
198268°F42°F0.05"0"
198160°F51°F1.6"0"
198060°F47°F0.03"0"
197968°F54°F0"0"
197863°F48°F0.71"0"
197778°F51°F0"0"
197663°F48°F0"0"
197562°F41°F0.15"0"
197454°F40°F1.88"0"
197367°F42°F0"0"
197273°F49°F0"0"
197159°F48°F0.33"0"

August 21 at Nearby Parks

Holiday Weather at Glacier Bay

Official NPS WebsiteVisit nps.gov/glba for park information, alerts, and reservations

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