Juneau, AK

Alaska · Records since 1943–2026

⛅ 60°F Feels like 57°
Currently in Juneau
As of 10:15 AM

Records for September 11

🔥 Record High

72°F

September 11, 2018

+15° from 57° normal

❄ Record Low

28°F

September 11, 1970

-17° from 45° normal
🌞 Normal high: 57°F 🌑 Normal low: 45°F 1991–2020 normals

All-Time Records — Juneau

🔥
90°F
Hottest Day Ever
Jul 7, 1975
❄
-22°F
Coldest Day Ever
Jan 12, 1972
🌧
4.93"
Wettest Day Ever
Dec 1, 2020
☃
30.6"
Most Snow in One Day
Mar 21, 1948

First & Last Dates — Juneau

How early and how late each seasonal turning point has ever arrived, across the full period of record

Jan Feb Mar Apr May Jun Jul Aug Sep Oct Nov Dec
Range ever recorded Normal date (1991–2020)
198 days
Longest growing season
1993
91 days
Shortest growing season
1955
144 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 72°F September 11, 2018
2 69°F September 11, 1973
3 67°F September 11, 1960
4 66°F September 11, 1989
5 66°F September 11, 1986
6 65°F September 11, 2020
7 65°F September 11, 1965
8 65°F September 11, 1957
9 65°F September 11, 1946
10 64°F September 11, 2013

Top 5 Record Lows — September 11

# Temp Date
🥶 28°F September 11, 1970
2 32°F September 11, 1962
3 32°F September 11, 1958
4 34°F September 11, 1954
5 35°F September 11, 1980
About this data — Records are sourced from the NOAA Threadex dataset via RCC ACIS, a quality-controlled record for long-term climate stations. Threadex adjusts for station relocations and observation-time changes, making records comparable across all years since 1943–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Juneau

threshold: 74°F (90th percentile of historical Jun–Aug highs)
4.0
Avg heat wave length
days (historical)
80°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Juneau

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 8, 1951 – Jul 17, 1951 10 82°F (Jul 10) 79°F 50°F
2 Jun 9, 1948 – Jun 17, 1948 9 83°F (Jun 17) 80°F 44°F
3 Jun 18, 2004 – Jun 25, 2004 8 85°F (Jun 19) 84°F 50°F
4 Jul 3, 2009 – Jul 9, 2009 7 85°F (Jul 6) 81°F 47°F
5 Jul 29, 1976 – Aug 4, 1976 7 84°F (Jul 31) 79°F 49°F
6 Jun 27, 1992 – Jul 3, 1992 7 82°F (Jun 30) 77°F 52°F
7 Jun 13, 1944 – Jun 19, 1944 7 80°F (Jun 15) 77°F 45°F
8 Jul 10, 1993 – Jul 16, 1993 7 79°F (Jul 12) 78°F 52°F
9 Jun 11, 1969 – Jun 16, 1969 6 86°F (Jun 13) 82°F 48°F
10 Jun 3, 1980 – Jun 8, 1980 6 83°F (Jun 5) 79°F 46°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

Nights where the overnight low exceeded the 1991–2020 normal low

41
2026 total
above-normal nights
39.8
Avg / summer
1970–2020
74
Most in a summer
2016

Above-Normal Summer Nights Per Year

Average June–August Low by Decade

Overnight lows · complete decades only

Precipitation

Annual totals and trend across the full period of record · see this year's standing →

Monthly Precipitation — Last 24 Months

Blue = actual · dashed line = monthly normal

Annual Precipitation Per Year (1943–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1943, annual totals have trended +2.69" per decade, about +22.0" across the record.

Heavy Rain Days Per Year (≥ 1.0")

Compare year-to-year changes in days with heavy rainfall (≥ 1.0")

This Year — 2026

How Juneau is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

98 of 253 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

36.25"
2026 YTD
Normal: 39.20"
-2.95"
1.40"
September so far
September normal: 9.15"
-7.75"
5
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Juneau is 2.95" behind the normal pace

Period Review — Aug 11 – Sep 10, 2026

Any window, evaluated against every other year on record — 31 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
56.7°F
Average temperature
7th-warmest of 84
+2.4°
vs. average
Normal: 54.3°F (1991–2020)
5.98"
Precipitation
38th-driest of 83
-1.81"
vs. average
Normal: 7.79" · 77% of normal

Average Temperature by Year — Aug 11 – Sep 10

1943–2026 · 2026 highlighted · trend +0.38° per decade (warming since 1943)

Precipitation by Year — Aug 11 – Sep 10

1943–2026 · 2026 highlighted · trend +0.38" per decade (wetter since 1943)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1989 57.8°F
2 1997 57.7°F
3 1963 57.5°F
4 2025 57.4°F
5 2022 57.1°F
6 1979 56.9°F
7 2026 56.7°F
8 2016 56.7°F
9 1990 56.5°F
10 2013 56.5°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1969 48.9°F
2 1970 49.6°F
3 1955 50.2°F
4 1952 50.7°F
5 1973 50.9°F
6 1966 51.0°F
7 1959 51.1°F
8 2011 51.4°F
9 1943 51.7°F
10 1960 51.8°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 2011 14.03"
2 2017 12.90"
3 2006 12.30"
4 1961 11.87"
5 1991 11.70"
6 2015 11.21"
7 2021 10.71"
8 1981 10.68"
9 1947 10.14"
10 1983 9.83"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 1954 1.13"
2 1979 1.29"
3 1978 2.20"
4 1949 2.29"
5 1963 2.92"
6 1989 2.98"
7 1957 3.20"
8 1964 3.32"
9 1946 3.42"
10 1951 3.63"
About this data. Pick any start and end date and this becomes the same kind of review as the Month and Fall tabs, just for exactly the window you asked for — the generalized version of the same engine, evaluated across every year on record. Average temperature is the mean of each day's (high + low) / 2; precipitation is the sum of daily totals. A year missing more than about a fifth of the window's days is excluded from the temperature ranking; any missing day excludes a year from the precipitation ranking, since an unreported day is unreported rain. Ranges that cross from December into January aren't supported yet. Normals are the 1991–2020 mean for the same window.
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