Eureka, CA
California · Records since 1886–2026
Records for August 11
🔥 Record High
August 11, 2003
+7° from 64° normal❄ Record Low
August 11, 1904
-5° from 53° normalAll-Time Records — Eureka
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 71°F | August 11, 2003 |
| 2 | 71°F | August 11, 1985 |
| 3 | 71°F | August 11, 1983 |
| 4 | 70°F | August 11, 2015 |
| 5 | 70°F | August 11, 1922 |
| 6 | 69°F | August 11, 2019 |
| 7 | 69°F | August 11, 2018 |
| 8 | 69°F | August 11, 2009 |
| 9 | 69°F | August 11, 1994 |
| 10 | 68°F | August 11, 2022 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 48°F | August 11, 1904 |
| 2 | 48°F | August 11, 1895 |
| 3 | 49°F | August 11, 1917 |
| 4 | 49°F | August 11, 1914 |
| 5 | 49°F | August 11, 1910 |
Heat Wave Summary — Eureka
threshold: 66°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date107 of 221 days with data were above the 1991–2020 normal high for their date.
Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Eureka
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 20, 1997 – Sep 22, 1997 | 34 | 75°F (Sep 13) | 71°F | 56°F |
| 2 | Aug 22, 1979 – Sep 15, 1979 | 25 | 85°F (Sep 12) | 70°F | 57°F |
| 3 | Aug 3, 1994 – Aug 25, 1994 | 23 | 69°F (Aug 10) | 67°F | 56°F |
| 4 | Sep 5, 2019 – Sep 25, 2019 | 21 | 76°F (Sep 15) | 69°F | 55°F |
| 5 | Sep 14, 2020 – Sep 29, 2020 | 16 | 87°F (Sep 28) | 71°F | 55°F |
| 6 | Aug 1, 1983 – Aug 15, 1983 | 15 | 76°F (Aug 12) | 69°F | 56°F |
| 7 | Jul 21, 2026 – Aug 4, 2026 | 15 | 73°F (Jul 22) | 68°F | 54°F |
| 8 | Jul 12, 2007 – Jul 24, 2007 | 13 | 74°F (Jul 21) | 70°F | 57°F |
| 9 | Aug 4, 2003 – Aug 16, 2003 | 13 | 71°F (Aug 8) | 70°F | 55°F |
| 10 | Aug 23, 2019 – Sep 3, 2019 | 12 | 73°F (Aug 29) | 69°F | 55°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
Actual vs. 1991–2020 full-month and full-season normals
Monthly Precipitation — Last 24 Months
Blue = actual · dashed line = monthly normal
Annual Precipitation Per Year (1970–2026)
Blue = above average · tan = below average · gold = 2026 (partial)
Heavy Rain Days Per Year (≥ 1.0")
Compare year-to-year changes in days with heavy rainfall (≥ 1.0")
Month in Review — July 2026
Average temperature · July 2026
71st-warmest month on record
14th-warmest July of 140 on record
+0.7° vs. 58.2° average (1991–2020)Average July Temperature by Year
1887–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2007 | 61.3°F |
| 2 | 2015 | 61.1°F |
| 3 | 1992 | 60.5°F |
| 4 | 1983 | 60.5°F |
| 5 | 2019 | 60.4°F |
| 6 | 1995 | 60.2°F |
| 7 | 2004 | 60.2°F |
| 8 | 1947 | 60.2°F |
| 9 | 1990 | 59.8°F |
| 10 | 1942 | 59.8°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | September 1979 | 62.2°F |
| 2 | September 1997 | 62.2°F |
| 3 | August 1983 | 61.9°F |
| 4 | August 2019 | 61.9°F |
| 5 | September 1990 | 61.6°F |
| 6 | August 2015 | 61.5°F |
| 7 | August 1997 | 61.4°F |
| 8 | August 1994 | 61.4°F |
| 9 | July 2007 | 61.3°F |
| 10 | August 2003 | 61.2°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Eureka, CA | 59.0°F | 14th of 140 |
| Crescent City, CA | 57.6°F | 73rd of 116 |
| Redding, CA | 83.4°F | 52nd of 123 |
| Mount Shasta, CA | 69.5°F | 32nd of 76 |