When is the best time to visit Glacier Bay National Park, Alaska?

In Ideal Weather mode, the best months to visit Glacier Bay National Park are June, July, May. June is the single peak month with an Ideal Weather score of 6.3/10 based on temperature, rainfall, humidity, daylight and days with 6+ hours of sunshine.

What is the weather like in Glacier Bay National Park year-round?

Glacier Bay National Park has a climate profile suited to nature and wildlife travel. Average monthly temperatures range from -2°C in January to 12°C in August, with Ideal Weather scores between 0.8 and 6.3 out of 10.

Which months should I avoid in Glacier Bay National Park?

The lowest Ideal Weather-scoring months in Glacier Bay National Park are January (0.8/10), December (0.9/10), February (1.3/10). These months typically combine less comfortable temperatures, higher rainfall or fewer days with 6+ hours of sunshine.

When is the rainy season in Glacier Bay National Park?

October is the wettest month in Glacier Bay National Park, averaging about 606 mm of rainfall. June is the driest, at roughly 166 mm.

Which is the sunniest month in Glacier Bay National Park?

June sees the most sun in Glacier Bay National Park, with about 23 days with 6+ hours of sunshine on average - ideal for outdoor plans.

Is Glacier Bay National Park a good destination for nature and wildlife travel?

Glacier Bay National Park is well suited to nature and wildlife travel. Its highest Ideal Weather window (June, July, May) aligns with the conditions travelers usually look for in this style of trip.

How is the bestime.to score for Glacier Bay National Park calculated?

Each month receives an Ideal Weather score from 0-10 using ERA5 climate normals for Glacier Bay National Park: temperature comfort, precipitation, humidity, daylight hours, and days with 6+ hours of sunshine - weighted for nature and wildlife travel.

Best Time to Visit Glacier Bay National Park: June

January in Glacier Bay National Park: expect compromises

Hardest · 0.8/10

At -2°C (28°F) this is proper winter weather in January: layer up and split the day between outdoor highlights and indoor stops.

477 mm of water-equivalent precipitation makes this a snowy month at resort level; what falls stays as snow, with almost no days with 6+ hours of sunshine and 6.7 hours of daylight.

That is 0.8/10 on the same scale — 12th of 12 months, versus 6.3/10 for the best month here.

Expect low-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Glacier Bay National Park — 5.5 points higher on the same scale.

February in Glacier Bay National Park — the hardest end of the year

Hardest · 1.3/10

At -2°C (28°F) this is proper winter weather in February: layer up and split the day between outdoor highlights and indoor stops.

314 mm of water-equivalent precipitation makes this a snowy month at resort level; what falls stays as snow, with almost no days with 6+ hours of sunshine and 8.9 hours of daylight.

That is 1.3/10 on the same scale — 9th of 12 months, versus 6.3/10 for the best month here.

Budget for low-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Glacier Bay National Park — 5 points higher on the same scale.

March in Glacier Bay National Park: expect compromises

Hardest · 1.9/10

March averages -1°C (30°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

At 337 mm of water-equivalent precipitation this is a snowy month at resort level — that is snowpack, not lost days — with almost no days with 6+ hours of sunshine and 11.4 hours of daylight.

It scores 1.9/10 here, 8th of 12 months, against 6.3/10 in the destination's best month.

Figure on low-season pricing, with crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

Flexible dates? June scores 4.4 points higher here — enough to change the trip.

April in Glacier Bay National Park: expect compromises

Hardest · 4/10

At 2°C (35°F) this is proper winter weather in April: layer up and split the day between outdoor highlights and indoor stops.

Expect monsoon-level rainfall at 210 mm: only about 12 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.

That is 4/10 on the same scale — 5th of 12 months, versus 6.3/10 for the best month here.

Budget for mid-season pricing, and crowds are moderate.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Glacier Bay National Park — 2.3 points higher on the same scale.

May in Glacier Bay National Park: mixed conditions, plan around the weather

Trade-offs · 5.2/10

May averages 5°C (41°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

272 mm makes this the wettest stretch of the year, though about 22 days with 6+ hours of sunshine still appear — keep an indoor fallback ready.

It scores 5.2/10 here, 3rd of 12 months, against 6.3/10 in the destination's best month.

Plan for mid-season pricing, with crowds are moderate.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

June in Glacier Bay National Park tops the year's climate scores

Best window · 6.3/10

Expect 9°C (49°F) in June. A good month for city streets, viewpoints and long meals; leave swimming for another season.

166 mm of rain makes this a wet month here, though with about 23 days with 6+ hours of sunshine there is still bright weather between the fronts.

On our climate-comfort scale this is the top-ranked month of the year for Glacier Bay National Park at 6.3/10 — the reference point every other month on this page is measured against.

Expect peak pricing, and crowds are moderate. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

July in Glacier Bay National Park: mixed conditions, plan around the weather

Trade-offs · 5.9/10

Expect 11°C (52°F) in July. A good month for city streets, viewpoints and long meals; leave swimming for another season.

Expect monsoon-level rainfall at 217 mm: only about 18 days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.

That is 5.9/10 on the same scale — 2nd of 12 months, versus 6.3/10 for the best month here.

Budget for peak pricing, and this is one of the busiest months here. You are paying the year's highest rates for the year's best conditions — book early or shift a few weeks either side.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

August in Glacier Bay National Park: mixed conditions, plan around the weather

Trade-offs · 5/10

August averages 12°C (53°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

254 mm of rain puts this in monsoon territory — about 11 days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.

It scores 5/10 here, 4th of 12 months, against 6.3/10 in the destination's best month.

Figure on peak pricing, with this is one of the busiest months here.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

September in Glacier Bay National Park: expect compromises

Hardest · 3.4/10

September averages 9°C (47°F) — jacket weather. Comfortable for walking and museums, too cool for anything water-based.

557 mm of rain puts this in monsoon territory — almost no days with 6+ hours of sunshine across the whole month, and multi-day washouts are normal.

It scores 3.4/10 here, 6th of 12 months, against 6.3/10 in the destination's best month.

Figure on mid-season pricing, with crowds are moderate.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

Flexible dates? June scores 2.9 points higher here — enough to change the trip.

October in Glacier Bay National Park — the hardest end of the year

Hardest · 2.5/10

Expect 5°C (41°F) in October. A good month for city streets, viewpoints and long meals; leave swimming for another season.

Expect monsoon-level rainfall at 606 mm: only almost no days with 6+ hours of sunshine across the month, and stretches of heavy rain are normal.

That is 2.5/10 on the same scale — 7th of 12 months, versus 6.3/10 for the best month here.

Budget for low-season pricing, and crowds are light for this destination.

Pack a mid-weight jacket, long sleeves and shoes you can walk 15 km in, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Glacier Bay National Park — 3.8 points higher on the same scale.

November in Glacier Bay National Park — the hardest end of the year

Hardest · 1.3/10

At 0°C (32°F) this is proper winter weather in November: layer up and split the day between outdoor highlights and indoor stops.

446 mm of water-equivalent precipitation makes this a snowy month at resort level; what falls stays as snow, with almost no days with 6+ hours of sunshine and 7.4 hours of daylight.

That is 1.3/10 on the same scale — 10th of 12 months, versus 6.3/10 for the best month here.

Budget for low-season pricing, and crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

If your dates are flexible, June is materially better in Glacier Bay National Park — 5 points higher on the same scale.

December in Glacier Bay National Park: expect compromises

Hardest · 0.9/10

December averages -1°C (30°F), cold enough that sightseeing works in bursts rather than in one long day on foot.

At 517 mm of water-equivalent precipitation this is a snowy month at resort level — that is snowpack, not lost days — with almost no days with 6+ hours of sunshine and 6 hours of daylight.

It scores 0.9/10 here, 11th of 12 months, against 6.3/10 in the destination's best month.

Plan for low-season pricing, with crowds are light for this destination.

Pack insulated layers, a windproof shell, gloves and boots with grip, a proper rain shell rather than an umbrella, footwear you can get muddy.

Flexible dates? June scores 5.4 points higher here — enough to change the trip.