Philadelphia Center City, PA
Pennsylvania · Records since 1940–2026
Records for August 11
🔥 Record High
August 11, 2005
+12° from 88° normal❄ Record Low
August 11, 1962
-14° from 70° normalAll-Time Records — Philadelphia Center City
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 100°F | August 11, 2005 |
| 2 | 97°F | August 11, 1949 |
| 3 | 96°F | August 11, 2020 |
| 4 | 96°F | August 11, 2010 |
| 5 | 95°F | August 11, 2002 |
| 6 | 95°F | August 11, 1966 |
| 7 | 94°F | August 11, 1944 |
| 8 | 93°F | August 11, 2022 |
| 9 | 93°F | August 11, 2018 |
| 10 | 93°F | August 11, 2016 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 56°F | August 11, 1962 |
| 2 | 59°F | August 11, 1974 |
| 3 | 60°F | August 11, 2007 |
| 4 | 61°F | August 11, 1996 |
| 5 | 61°F | August 11, 1982 |
Heat Wave Summary — Philadelphia Center City
threshold: 94°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date88 of 203 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1940–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Philadelphia Center City
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 28, 2002 – Aug 5, 2002 | 9 | 102°F (Aug 2) | 98°F | 78°F |
| 2 | Aug 11, 2002 – Aug 19, 2002 | 9 | 102°F (Aug 13) | 98°F | 78°F |
| 3 | Aug 27, 1973 – Sep 3, 1973 | 8 | 102°F (Aug 28) | 98°F | 79°F |
| 4 | Aug 27, 1953 – Sep 3, 1953 | 8 | 100°F (Aug 30) | 98°F | 78°F |
| 5 | Jun 30, 2018 – Jul 6, 2018 | 7 | 101°F (Jul 3) | 98°F | 78°F |
| 6 | Jun 7, 1984 – Jun 13, 1984 | 7 | 99°F (Jun 9) | 98°F | 76°F |
| 7 | Jul 19, 2022 – Jul 25, 2022 | 7 | 99°F (Jul 24) | 97°F | 79°F |
| 8 | Jul 13, 1997 – Jul 18, 1997 | 6 | 100°F (Jul 15) | 98°F | 78°F |
| 9 | Jul 16, 2013 – Jul 21, 2013 | 6 | 99°F (Jul 19) | 97°F | 80°F |
| 10 | Aug 12, 2016 – Aug 17, 2016 | 6 | 99°F (Aug 13) | 97°F | 79°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
22nd-warmest month on record
17th-warmest July of 85 on record
+1.0° vs. 80.1° average (1991–2020)Longest 90°F Streak in July
6 consecutive days with highs of at least 90°F (Jul 1–6, 2026, peaking at 104°F)
The longest July streak since 2025 (1 year). The July record is 13 days, set in 2005.
Average July Temperature by Year
1940–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1999 | 83.9°F |
| 2 | 2006 | 83.4°F |
| 3 | 2011 | 83.4°F |
| 4 | 2005 | 83.1°F |
| 5 | 2025 | 82.8°F |
| 6 | 2024 | 82.7°F |
| 7 | 2022 | 82.7°F |
| 8 | 2010 | 82.6°F |
| 9 | 2002 | 82.1°F |
| 10 | 2012 | 82.0°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1999 | 83.9°F |
| 2 | July 2006 | 83.4°F |
| 3 | July 2011 | 83.4°F |
| 4 | August 2005 | 83.2°F |
| 5 | July 2005 | 83.1°F |
| 6 | July 2025 | 82.8°F |
| 7 | July 2024 | 82.7°F |
| 8 | July 2022 | 82.7°F |
| 9 | July 2010 | 82.6°F |
| 10 | July 2002 | 82.1°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Philadelphia Center City, PA | 81.1°F | 17th of 85 |
| Philadelphia, PA | 80.3°F | 18th of 153 |
| Wilmington, DE | 78.4°F | 22nd of 113 |
| Trenton, NJ | 76.4°F | 54th of 132 |
| Allentown, PA | 75.2°F | 34th of 103 |