Anchorage, AK

Alaska · Records since 1953–2026

☀️ 53°F
Currently in Anchorage
As of 10:00 AM AKDT

Records for September 11

🔥 Record High

69°F

September 11, 1979

+12° from 57° normal

❄ Record Low

25°F

September 11, 1992

-19° from 44° normal
🌞 Normal high: 57°F 🌑 Normal low: 44°F 1991–2020 normals

All-Time Records — Anchorage

🔥
90°F
Hottest Day Ever
Jul 4, 2019
❄
-34°F
Coldest Day Ever
Jan 5, 1975
🌧
2.76"
Wettest Day Ever
Aug 21, 1997
☃
22.0"
Most Snow in One Day
Mar 17, 2002

First & Last Dates — Anchorage

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)
181 days
Longest growing season
2025
112 days
Shortest growing season
1984
143 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 69°F September 11, 1979
2 67°F September 11, 2018
3 66°F September 11, 2014
4 65°F September 11, 1974
5 64°F September 11, 2019
6 64°F September 11, 2009
7 64°F September 11, 2003
8 64°F September 11, 1984
9 63°F September 11, 1961
10 62°F September 11, 1997

Top 5 Record Lows — September 11

# Temp Date
🥶 25°F September 11, 1992
2 32°F September 11, 1980
3 34°F September 11, 2012
4 34°F September 11, 1973
5 35°F September 11, 2020
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 1953–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Anchorage

threshold: 71°F (90th percentile of historical Jun–Aug highs)
4.5
Avg heat wave length
days (historical)
77°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
2
Heat waves 2026
so far

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Anchorage

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 17, 2013 – Jul 31, 2013 15 79°F (Jul 21) 74°F 57°F
2 Jun 26, 2019 – Jul 9, 2019 14 90°F (Jul 4) 80°F 58°F
3 Aug 4, 2019 – Aug 17, 2019 14 77°F (Aug 7) 76°F 59°F
4 Aug 2, 2004 – Aug 11, 2004 10 78°F (Aug 2) 74°F 53°F
5 Aug 18, 1978 – Aug 26, 1978 9 75°F (Aug 24) 72°F 49°F
6 Jul 31, 2015 – Aug 7, 2015 8 79°F (Aug 3) 76°F 55°F
7 Jun 13, 2015 – Jun 19, 2015 7 83°F (Jun 15) 78°F 54°F
8 Jul 1, 2018 – Jul 7, 2018 7 80°F (Jul 3) 76°F 55°F
9 Jul 6, 2004 – Jul 12, 2004 7 78°F (Jul 8) 76°F 56°F
10 May 30, 2022 – Jun 5, 2022 7 78°F (Jun 3) 76°F 51°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

34
2026 total
above-normal nights
37.6
Avg / summer
1970–2020
80
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 (1953–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1953, annual totals have trended +0.73" per decade, about +5.2" 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 Anchorage is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

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

Precipitation, Year to Date

13.89"
2026 YTD
Normal: 10.19"
+3.70"
0.59"
September so far
September normal: 3.10"
-2.51"
0
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Anchorage is 3.70" ahead of 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)
55.6°F
Average temperature
28th-warmest of 73
+0.0°
vs. average
Normal: 55.5°F (1991–2020)
1.76"
Precipitation
16th-driest of 73
-1.46"
vs. average
Normal: 3.22" · 55% of normal

Average Temperature by Year — Aug 11 – Sep 10

1954–2026 · 2026 highlighted · trend +0.40° per decade (warming since 1954)

Precipitation by Year — Aug 11 – Sep 10

1954–2026 · 2026 highlighted · trend +0.19" per decade (wetter since 1954)

Warmest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 2019 60.1°F
2 2016 58.8°F
3 1977 58.7°F
4 1957 57.8°F
5 2004 57.5°F
6 1978 57.4°F
7 1963 57.3°F
8 1989 57.2°F
9 2007 56.9°F
10 1995 56.9°F

Coolest Aug 11 – Sep 10 on Record

# Year Avg Temp
1 1980 50.7°F
2 1998 51.5°F
3 1966 51.5°F
4 1969 51.6°F
5 1973 51.7°F
6 1955 51.9°F
7 1992 52.2°F
8 1970 52.4°F
9 1960 52.4°F
10 2000 52.4°F

Wettest Aug 11 – Sep 10 on Record

# Year Total
1 1997 8.99"
2 1989 8.98"
3 2013 6.84"
4 2022 6.07"
5 2006 6.00"
6 1991 5.41"
7 1993 5.01"
8 2023 4.98"
9 2017 4.87"
10 1999 4.52"

Driest Aug 11 – Sep 10 on Record

# Year Total
1 1976 0.94"
2 1969 0.94"
3 1958 0.94"
4 2019 0.97"
5 1968 1.05"
6 2004 1.07"
7 1979 1.10"
8 1974 1.12"
9 1987 1.20"
10 1962 1.25"
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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