San Francisco Airport, CA
California · Records since 1945–2026
☀️ 67°F
Feels like 62°
Currently in San Francisco Airport
As of 5:00 PM PDT
Records for July 28
🔥 Record High
88°F
July 28, 1954
+16° from 72° normal❄ Record Low
48°F
July 28, 1953
-8° from 56° normal
🌞 Normal high: 72°F 🌑 Normal low: 56°F 1991–2020 normals
All-Time Records — San Francisco Airport
105°F
Hottest Day Ever
Jun 14, 2000
24°F
Coldest Day Ever
Dec 9, 1972
5.59"
Wettest Day Ever
Jan 4, 1982
1.5"
Most Snow in One Day
Jan 21, 1962
Top 10 Record Highs — July 28
| # | Temp | Date |
|---|---|---|
| 🏆 | 88°F | July 28, 1954 |
| 2 | 87°F | July 28, 2015 |
| 3 | 87°F | July 28, 1967 |
| 4 | 85°F | July 28, 1948 |
| 5 | 80°F | July 28, 1980 |
| 6 | 80°F | July 28, 1959 |
| 7 | 78°F | July 28, 1996 |
| 8 | 78°F | July 28, 1964 |
| 9 | 76°F | July 28, 2019 |
| 10 | 76°F | July 28, 1958 |
Top 5 Record Lows — July 28
| # | Temp | Date |
|---|---|---|
| 🥶 | 48°F | July 28, 1953 |
| 2 | 49°F | July 28, 1961 |
| 3 | 49°F | July 28, 1955 |
| 4 | 50°F | July 28, 1989 |
| 5 | 50°F | July 28, 1951 |
Heat Wave Summary — San Francisco Airport
threshold: 79°F (90th percentile of historical Jun–Aug highs)3.8
Avg heat wave length
days (historical)
90°
Avg peak temp
during heat waves
0
Dangerous nights 2026
Overnights ≥ 70°F
1
Heat waves 2026
so far
2026 Daily High Temperature vs Normal
Year to date
Above normal
Below normal
99 of 207 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1946–20262
2026 so far
4
Avg/year 1970–2025
5
Avg/year (last 10 complete)
12
Most in a year (1984)
Average 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
42
2026 so far
above-normal nights
34.2
Avg / summer
1970–2020
82
Most in a summer
2015
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
10.74"
2026 YTD
Normal: 12.56"
-1.82"
0.00"
July so far
0.01"
Summer so far
Summer normal: 0.18"
-0.17"
4
2026 heavy rain days
Days with ≥ 1.0"
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")