Honolulu, HI
Hawaii · Records since 1940–2026
Records for September 11
🔥 Record High
September 11, 2019
+4° from 88° normal❄ Record Low
September 11, 1985
-7° from 75° normalAll-Time Records — Honolulu
First & Last Dates — Honolulu
How early and how late each seasonal turning point has ever arrived, across the full period of record
Top 10 Record Highs — September 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 92°F | September 11, 2019 |
| 2 | 92°F | September 11, 1984 |
| 3 | 92°F | September 11, 1979 |
| 4 | 92°F | September 11, 1966 |
| 5 | 91°F | September 11, 2025 |
| 6 | 91°F | September 11, 2001 |
| 7 | 91°F | September 11, 1997 |
| 8 | 91°F | September 11, 1994 |
| 9 | 91°F | September 11, 1986 |
| 10 | 91°F | September 11, 1968 |
Top 5 Record Lows — September 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 68°F | September 11, 1985 |
| 2 | 69°F | September 11, 1973 |
| 3 | 70°F | September 11, 1981 |
| 4 | 70°F | September 11, 1972 |
| 5 | 71°F | September 11, 1995 |
Heat Wave Summary — Honolulu
threshold: 90°F (90th percentile of historical Jun–Aug highs)Days ≥ 90°F Per Year
1940–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Honolulu
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 26, 1995 – Oct 5, 1995 | 41 | 93°F (Sep 5) | 91°F | 76°F |
| 2 | Aug 10, 2019 – Sep 15, 2019 | 37 | 95°F (Aug 31) | 92°F | 78°F |
| 3 | Jul 27, 1994 – Aug 24, 1994 | 29 | 93°F (Aug 13) | 91°F | 78°F |
| 4 | Jul 31, 1970 – Aug 25, 1970 | 26 | 92°F (Aug 10) | 90°F | 77°F |
| 5 | Aug 19, 1987 – Sep 10, 1987 | 23 | 94°F (Sep 5) | 92°F | 75°F |
| 6 | Aug 7, 1996 – Aug 29, 1996 | 23 | 93°F (Aug 24) | 91°F | 75°F |
| 7 | Aug 5, 2005 – Aug 24, 2005 | 20 | 92°F (Aug 8) | 91°F | 77°F |
| 8 | Aug 22, 1986 – Sep 8, 1986 | 18 | 94°F (Sep 4) | 92°F | 75°F |
| 9 | Jul 28, 1969 – Aug 13, 1969 | 17 | 92°F (Jul 28) | 91°F | 77°F |
| 10 | Aug 15, 1968 – Aug 30, 1968 | 16 | 92°F (Aug 16) | 91°F | 75°F |
Heat Waves Per Year
Warm Summer Nights (Jun–Aug)
Nights where the overnight low exceeded the 1991–2020 normal low
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 (1940–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Since 1940, annual totals have trended
-0.83" per decade,
about -7.1"
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 Honolulu is tracking against normal, year to date
Daily High Temperature vs Normal
86 of 253 days with data were above the 1991–2020 normal high for their date.
Precipitation, Year to Date
Accumulation vs. Normal
Running total since Jan 1 against the normal pace for the same date · Honolulu is 12.42" ahead of the normal pace
Period Review — Sep 1 – Nov 30, 2026
Any window, evaluated against every other year on record — 91 days
Average Temperature by Year — Sep 1 – Nov 30
1942–2025 · 2026 highlighted · trend +0.31° per decade (warming since 1942)
Precipitation by Year — Sep 1 – Nov 30
1941–2025 · 2026 highlighted · trend -0.13" per decade (drier since 1941)