Los Angeles Downtown, CA
California · Records since 1877–2026
Records for September 11
🔥 Record High
September 11, 1983
+17° from 84° normal❄ Record Low
September 11, 1901
-17° from 65° normalAll-Time Records — Los Angeles Downtown
First & Last Dates — Los Angeles Downtown
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 |
|---|---|---|
| 🏆 | 101°F | September 11, 1983 |
| 2 | 101°F | September 11, 1878 |
| 3 | 100°F | September 11, 1959 |
| 4 | 100°F | September 11, 1948 |
| 5 | 99°F | September 11, 1918 |
| 6 | 98°F | September 11, 1963 |
| 7 | 97°F | September 11, 1990 |
| 8 | 97°F | September 11, 1971 |
| 9 | 96°F | September 11, 1898 |
| 10 | 95°F | September 11, 2015 |
Top 5 Record Lows — September 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 48°F | September 11, 1901 |
| 2 | 51°F | September 11, 1900 |
| 3 | 51°F | September 11, 1886 |
| 4 | 52°F | September 11, 1892 |
| 5 | 53°F | September 11, 1924 |
Heat Wave Summary — Los Angeles Downtown
threshold: 89°F (90th percentile of historical Jun–Aug highs)Days ≥ 90°F Per Year
1877–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Los Angeles Downtown
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 25, 1995 – Sep 7, 1995 | 14 | 100°F (Sep 5) | 95°F | 71°F |
| 2 | Aug 17, 2026 – Aug 30, 2026 | 14 | 98°F (Aug 23) | 95°F | 70°F |
| 3 | Jul 29, 1971 – Aug 11, 1971 | 14 | 97°F (Aug 6) | 93°F | 72°F |
| 4 | Aug 5, 1983 – Aug 17, 1983 | 13 | 105°F (Aug 6) | 95°F | 74°F |
| 5 | Aug 25, 2009 – Sep 5, 2009 | 12 | 101°F (Aug 27) | 95°F | 68°F |
| 6 | Jul 7, 1984 – Jul 18, 1984 | 12 | 98°F (Jul 14) | 93°F | 72°F |
| 7 | Aug 1, 2018 – Aug 11, 2018 | 11 | 98°F (Aug 8) | 92°F | 71°F |
| 8 | Jul 18, 1891 – Jul 27, 1891 | 10 | 109°F (Jul 25) | 95°F | 65°F |
| 9 | Sep 20, 1978 – Sep 29, 1978 | 10 | 107°F (Sep 25) | 99°F | 70°F |
| 10 | Aug 9, 1994 – Aug 18, 1994 | 10 | 104°F (Aug 12) | 96°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 (1877–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Since 1877, annual totals have trended
-0.07" per decade,
about -1.1"
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 Los Angeles Downtown is tracking against normal, year to date
Daily High Temperature vs Normal
188 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 · Los Angeles Downtown is 2.22" behind the normal pace
Period Review — Sep 3 – Sep 10, 2026
Any window, evaluated against every other year on record — 8 days
Average Temperature by Year — Sep 3 – Sep 10
1877–2026 · 2026 highlighted · trend +0.61° per decade (warming since 1877)
Precipitation by Year — Sep 3 – Sep 10
1877–2025 · 2026 highlighted
Warmest Sep 3 – Sep 10 on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1984 | 86.1°F |
| 2 | 2024 | 85.3°F |
| 3 | 2022 | 84.4°F |
| 4 | 1955 | 82.9°F |
| 5 | 1997 | 82.1°F |
| 6 | 1990 | 81.5°F |
| 7 | 1891 | 80.8°F |
| 8 | 1988 | 80.5°F |
| 9 | 1983 | 80.1°F |
| 10 | 2015 | 79.9°F |
Coolest Sep 3 – Sep 10 on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1916 | 64.8°F |
| 2 | 1901 | 65.1°F |
| 3 | 1909 | 65.1°F |
| 4 | 1933 | 65.5°F |
| 5 | 1912 | 65.9°F |
| 6 | 1942 | 66.1°F |
| 7 | 1884 | 66.3°F |
| 8 | 1900 | 66.6°F |
| 9 | 1895 | 66.6°F |
| 10 | 1892 | 67.0°F |