Cool
Average highs are around 9°C, so pack for cooler days.
September verdict
Glacier Bay National Park, United States in September
Weather score15Poor
Poor for holiday weather
Average highs are around 9°C, so pack for cooler days. Sunshine averages 4.1h per day, so this is not one of the brighter months. Rainfall averages 162mm, so some wet days are possible.
September weather
Monthly averages
Temp
9°C
Rain
162mm
Sun
4.1h
Sea
12°C
Weather score
15
Poor
Seasonal climate calendar
TemperatureTemp
RainRain
SunSun
SwimSwim
Weather scoreWeather score
Trip feel
Showers
Rainfall averages 162mm, so some wet days are possible.
Limited sun
Sunshine averages 4.1h per day, so this is not one of the brighter months.
Cool sea
Sea temperatures average 12°C, so the water can feel cool.
Map
Weather map
Compare Glacier Bay National Park, United States with nearby places by weather score, rain, sun, temperature, and swim conditions.
Temperature
September9°C average high
September sits in the warmer part of the year, so midday sightseeing can feel heavier than in cooler months.
Warmest monthsJune to September
This stretch sets the upper range for average daytime heat.
Rain
September162mm average rain
September sits near Glacier Bay National Park's yearly rainfall average, so rain is a normal planning factor rather than an outlier.
Driest monthsMarch to August
This is the drier part of the year, when outdoor plans usually need less weather flexibility.
Sun
September4.1 hours average sun
September sits close to Glacier Bay National Park's yearly sunshine average, so it is a middle-of-the-pack month for bright days.
Brightest monthsApril to August
This stretch has the strongest sunshine in the monthly averages.
Sea temperature
September12°C average sea
September sits in the warmer sea-temperature season, usually making swimming easier to enjoy.
Warmest seaJuly to September
Sea temperatures are usually near 13°C in this stretch, so swimming comfort is at its strongest.
Weather score
September15 weather score
September scores below Glacier Bay National Park's yearly average, so the weather trade-offs are more noticeable.
Best weather monthsApril to July
These months have the strongest weather score in the monthly averages.
