San Francisco Airport, CA
California · Records since 1945–2026
Records for August 11
🔥 Record High
August 11, 2019
+11° from 73° normal❄ Record Low
August 11, 1951
-8° from 56° normalAll-Time Records — San Francisco Airport
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 84°F | August 11, 2019 |
| 2 | 84°F | August 11, 1959 |
| 3 | 83°F | August 11, 1998 |
| 4 | 81°F | August 11, 1991 |
| 5 | 79°F | August 11, 2014 |
| 6 | 79°F | August 11, 2000 |
| 7 | 78°F | August 11, 2023 |
| 8 | 78°F | August 11, 1971 |
| 9 | 77°F | August 11, 2020 |
| 10 | 77°F | August 11, 1985 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 48°F | August 11, 1951 |
| 2 | 48°F | August 11, 1946 |
| 3 | 49°F | August 11, 1947 |
| 4 | 51°F | August 11, 1960 |
| 5 | 51°F | August 11, 1955 |
Heat Wave Summary — San Francisco Airport
threshold: 79°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date102 of 221 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1946–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — San Francisco Airport
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Oct 12, 2020 – Oct 21, 2020 | 10 | 94°F (Oct 16) | 85°F | 58°F |
| 2 | Jul 17, 2006 – Jul 25, 2006 | 9 | 97°F (Jul 22) | 85°F | 60°F |
| 3 | Sep 30, 2024 – Oct 7, 2024 | 8 | 98°F (Oct 6) | 90°F | 62°F |
| 4 | Jun 15, 1981 – Jun 22, 1981 | 8 | 92°F (Jun 15) | 87°F | 55°F |
| 5 | Aug 13, 2020 – Aug 19, 2020 | 7 | 99°F (Aug 14) | 87°F | 62°F |
| 6 | Sep 27, 2020 – Oct 3, 2020 | 7 | 96°F (Sep 28) | 89°F | 59°F |
| 7 | Oct 10, 1959 – Oct 16, 1959 | 7 | 87°F (Oct 13) | 84°F | 55°F |
| 8 | Aug 31, 2017 – Sep 5, 2017 | 6 | 104°F (Sep 1) | 92°F | 65°F |
| 9 | Jun 23, 1976 – Jun 28, 1976 | 6 | 97°F (Jun 24) | 95°F | 59°F |
| 10 | Sep 24, 2010 – Sep 29, 2010 | 6 | 96°F (Sep 27) | 90°F | 60°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
105th-warmest month on record
20th-warmest July of 81 on record
+0.5° vs. 63.7° average (1991–2020)Average July Temperature by Year
1945–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2014 | 66.9°F |
| 2 | 2015 | 66.7°F |
| 3 | 1992 | 65.8°F |
| 4 | 2006 | 65.8°F |
| 5 | 1984 | 65.6°F |
| 6 | 1958 | 65.1°F |
| 7 | 1983 | 65.1°F |
| 8 | 1985 | 64.8°F |
| 9 | 2004 | 64.8°F |
| 10 | 1993 | 64.8°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | September 2017 | 69.8°F |
| 2 | September 1984 | 69.7°F |
| 3 | September 1958 | 69.5°F |
| 4 | October 2014 | 68.7°F |
| 5 | September 2020 | 68.7°F |
| 6 | September 2010 | 68.5°F |
| 7 | August 2019 | 68.4°F |
| 8 | September 2014 | 68.4°F |
| 9 | September 1997 | 68.3°F |
| 10 | September 1983 | 68.2°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| San Francisco Airport, CA | 64.2°F | 20th of 81 |
| San Jose, CA | 69.7°F | 34th of 130 |
| Stockton, CA | 77.4°F | 46th of 131 |
| Sacramento, CA | 76.7°F | 30th of 143 |
| Merced, CA | 79.1°F | 54th of 112 |