Delta Junction, AK

Alaska · Records since 1917–2026

⛅ 48°F Feels like 44°
Currently in Delta Junction
As of 10:30 AM AKDT

Records for September 11

🔥 Record High

72°F

September 11, 1965

+16° from 56° normal

❄ Record Low

25°F

September 11, 2012

-13° from 38° normal
🌞 Normal high: 56°F 🌑 Normal low: 38°F 1991–2020 normals

All-Time Records — Delta Junction

🔥
92°F
Hottest Day Ever
Jun 15, 1969
❄
-63°F
Coldest Day Ever
Jan 30, 1947
🌧
2.27"
Wettest Day Ever
Jul 28, 2008
☃
10.4"
Most Snow in One Day
Oct 18, 1981

First & Last Dates — Delta Junction

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)
139 days
Longest growing season
2016
43 days
Shortest growing season
1971
107 days
Normal growing season
1991–2020 average

Top 10 Record Highs — September 11

# Temp Date
🏆 72°F September 11, 1965
2 71°F September 11, 1961
3 68°F September 11, 1979
4 68°F September 11, 1964
5 66°F September 11, 2014
6 66°F September 11, 2009
7 66°F September 11, 2007
8 65°F September 11, 1986
9 65°F September 11, 1956
10 64°F September 11, 1999

Top 5 Record Lows — September 11

# Temp Date
🥶 25°F September 11, 2012
2 25°F September 11, 1992
3 28°F September 11, 2004
4 28°F September 11, 1986
5 29°F September 11, 1984
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 1917–2026. Climate normals represent the 1991–2020 average.

Heat Wave Summary — Delta Junction

threshold: 78°F (90th percentile of historical Jun–Aug highs)
4.3
Avg heat wave length
days (historical)
84°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
0
Heat waves 2026
so far

Days ≥ 90°F Per Year

1947–2026
0
2026 so far
2
Avg/year 1970–2025
2
Avg/year (last 10 complete)
2
Most in a year (1947)

Average Daily High by Decade

Full year · complete decades only

Longest Heat Waves — Delta Junction

# Dates Days Peak Avg High Avg Overnight Low
🏆 Jul 29, 1994 – Aug 7, 1994 10 90°F (Aug 6) 84°F 57°F
2 Jun 13, 2025 – Jun 22, 2025 10 84°F (Jun 20) 81°F 53°F
3 Jul 27, 1919 – Aug 4, 1919 9 89°F (Jul 29) 81°F 49°F
4 May 31, 1958 – Jun 8, 1958 9 87°F (Jun 1) 82°F 54°F
5 Jun 4, 1957 – Jun 12, 1957 9 85°F (Jun 10) 82°F 51°F
6 Jun 18, 2004 – Jun 25, 2004 8 88°F (Jun 24) 84°F 59°F
7 Jul 12, 1993 – Jul 19, 1993 8 87°F (Jul 16) 82°F 53°F
8 Jul 24, 1953 – Jul 31, 1953 8 86°F (Jul 27) 83°F 56°F
9 Jul 19, 1968 – Jul 26, 1968 8 84°F (Jul 22) 81°F 54°F
10 Jul 6, 1972 – Jul 13, 1972 8 84°F (Jul 11) 82°F 55°F

Heat Waves Per Year

Warm Summer Nights (Jun–Aug)

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

44
2026 total
above-normal nights
40.4
Avg / summer
1970–2020
74
Most in a summer
2004

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 (1919–2026)

Blue = above average · tan = below average · gold = 2026 (partial)
Since 1919, annual totals have trended +0.17" per decade, about +1.8" 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 Delta Junction is tracking against normal, year to date

Daily High Temperature vs Normal

Above normal Below normal

95 of 252 days with data were above the 1991–2020 normal high for their date.

Precipitation, Year to Date

10.01"
2026 YTD
Normal: 8.54"
+1.47"
0.87"
September so far
September normal: 0.90"
-0.03"
1
2026 heavy rain days
Days with ≥ 1.0"

Accumulation vs. Normal

Running total since Jan 1 against the normal pace for the same date · Delta Junction is 1.47" ahead of the normal pace

Period Review — Sep 1 – Nov 30, 2026

Any window, evaluated against every other year on record — 91 days

Quick picks: Last 7 days Last 30 days Last 90 days This month
Seasons: Spring (Mar–May) Summer (Jun–Aug) Fall (Sep–Nov)
2026 is still under way for this window — totals and rankings appear once November 30 passes.

Average Temperature by Year — Sep 1 – Nov 30

1941–2025 · 2026 highlighted · trend +0.23° per decade (warming since 1941)

Precipitation by Year — Sep 1 – Nov 30

1941–2024 · 2026 highlighted · trend -0.01" per decade (drier since 1941)

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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