Juneau's weather extremes

The hottest, coldest, wettest and snowiest days Juneau has recorded — the outer limits of what its weather can do. This station's daily record ended in 2021, so these are historical extremes from that period, not records updated to today.

Based on 50+ years of daily weather observations (1971–2021), from the Juneau Dwtn station. Updated through September 2021 — an all-time extreme only changes when a more extreme day actually occurs, so some dates are old. That is normal, not stale data.

The four kinds of extreme

The hottest, coldest, wettest and snowiest single days Juneau has recorded — each shown against what a normal day that time of year looks like.

🔥 Hottest day

88°F Aug 20, 1998

That is about 26°F hotter than a normal August afternoon in Juneau (typical high near 62°F).

The three most extreme on record

1 88°F Aug 20, 1998

2 87°F Jun 21, 1991

3 87°F Jun 24, 2012

❄️ Coldest night

-30°F Jan 12, 1998

About 56°F colder than a normal January night in Juneau (typical low near 27°F).

The three most extreme on record

1 -30°F Jan 12, 1998

2 -20°F Jan 19, 1972

3 -17°F Jan 9, 1998

🌧️ Most rain in one day

6.38 in Nov 22, 2003

About 73% of a typical November's rain in a single day (Juneau averages roughly 8.8 in across the month).

The three most extreme on record

1 6.38 in Nov 22, 2003

2 5.98 in Sep 7, 2011

3 5.00 in Dec 17, 2006

⛄ Most snow in one day

31.0 in Jan 10, 1972

The three most extreme on record

1 31.0 in Jan 10, 1972

2 15.0 in Dec 7, 1980

3 14.0 in Jan 30, 2012

How hot and cold it gets, month by month

The shaded band is the normal range of daily temperatures for each month. The dots show the most extreme it has ever been — so you can see how far beyond a normal day the records really sit.

normal range of daily temperatureshottest ever recordedcoldest ever recorded

Juneau's record heat sits well above even a hot day for the season — August's 88°F is about 26°F beyond a normal hot afternoon. Its record cold is just as far below a normal winter night — the dots mark how rare each extreme really is.

In plain terms

In a normal year, Juneau's warmest days reach the low 60s°F and its coldest nights drop to the mid-20s°F. But across the record it has gone as high as 88°F and as low as −30°F. A single day has delivered over 6 inches of rain or close to 31 inches of snow. Those are the outer edges worth knowing if you are moving here, planning a trip, or thinking about a house.

Methodology & sources

Temperature & precipitation — the official 1991–2020 climate normals from NOAA's U.S. Climate Normals, measured at Juneau AP (NOAA GHCN station USW00025309), about 10 km from the city centre.

How we build these numbers →

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