Lake Havasu City, AZ
Arizona · Records since 1968–2026
Records for September 11
🔥 Record High
September 11, 1990
+11° from 104° normal❄ Record Low
September 11, 2020
-10° from 76° normalAll-Time Records — Lake Havasu City
First & Last Dates — Lake Havasu City
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 |
|---|---|---|
| 🏆 | 115°F | September 11, 1990 |
| 2 | 113°F | September 11, 1979 |
| 3 | 111°F | September 11, 2024 |
| 4 | 111°F | September 11, 1993 |
| 5 | 111°F | September 11, 1983 |
| 6 | 109°F | September 11, 2021 |
| 7 | 109°F | September 11, 1997 |
| 8 | 109°F | September 11, 1994 |
| 9 | 109°F | September 11, 1992 |
| 10 | 108°F | September 11, 2016 |
Top 5 Record Lows — September 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 66°F | September 11, 2020 |
| 2 | 68°F | September 11, 1986 |
| 3 | 69°F | September 11, 2010 |
| 4 | 69°F | September 11, 1985 |
| 5 | 70°F | September 11, 1991 |
Heat Wave Summary — Lake Havasu City
threshold: 115°F (90th percentile of historical Jun–Aug highs)Days ≥ 90°F Per Year
1969–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Lake Havasu City
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 23, 2000 – Aug 5, 2000 | 14 | 121°F (Aug 5) | 117°F | 92°F |
| 2 | Jun 22, 1994 – Jul 3, 1994 | 12 | 128°F (Jun 29) | 121°F | 88°F |
| 3 | Jul 9, 1998 – Jul 18, 1998 | 10 | 126°F (Jul 16) | 119°F | 89°F |
| 4 | Jul 4, 2024 – Jul 12, 2024 | 9 | 122°F (Jul 9) | 118°F | 86°F |
| 5 | Jun 19, 1981 – Jun 27, 1981 | 9 | 117°F (Jun 21) | 116°F | 86°F |
| 6 | Jul 18, 1996 – Jul 25, 1996 | 8 | 123°F (Jul 23) | 118°F | 91°F |
| 7 | Jun 22, 1990 – Jun 29, 1990 | 8 | 121°F (Jun 27) | 117°F | 83°F |
| 8 | Aug 14, 2020 – Aug 21, 2020 | 8 | 120°F (Aug 16) | 117°F | 88°F |
| 9 | Jul 15, 2023 – Jul 22, 2023 | 8 | 120°F (Jul 16) | 117°F | 88°F |
| 10 | Jun 19, 2017 – Jun 25, 2017 | 7 | 122°F (Jun 21) | 119°F | 84°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 (1967–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Since 1967, annual totals have trended
-0.02" per decade,
about -0.1"
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 Lake Havasu City is tracking against normal, year to date
Daily High Temperature vs Normal
152 of 233 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 · Lake Havasu City is 1.67" behind the normal pace
Period Review — Aug 11 – Sep 10, 2026
Any window, evaluated against every other year on record — 31 days
Average Temperature by Year — Aug 11 – Sep 10
1977–2026 · 2026 highlighted · trend +0.19° per decade (warming since 1977)
Precipitation by Year — Aug 11 – Sep 10
1970–2025 · 2026 highlighted · trend -0.03" per decade (drier since 1970)
Warmest Aug 11 – Sep 10 on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1994 | 99.6°F |
| 2 | 1996 | 99.1°F |
| 3 | 1995 | 99.0°F |
| 4 | 1997 | 98.4°F |
| 5 | 2012 | 97.5°F |
| 6 | 2011 | 97.0°F |
| 7 | 1998 | 97.0°F |
| 8 | 2015 | 96.5°F |
| 9 | 2020 | 96.1°F |
| 10 | 1999 | 95.9°F |
Coolest Aug 11 – Sep 10 on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2013 | 90.8°F |
| 2 | 1979 | 90.9°F |
| 3 | 1983 | 91.2°F |
| 4 | 2014 | 92.0°F |
| 5 | 1985 | 92.2°F |
| 6 | 1990 | 92.2°F |
| 7 | 2023 | 92.3°F |
| 8 | 1978 | 92.4°F |
| 9 | 2016 | 92.5°F |
| 10 | 1980 | 92.5°F |