Wilmington, DE
Delaware · Records since 1894–2026
Records for August 11
🔥 Record High
August 11, 1895
+16° from 85° normal❄ Record Low
August 11, 1972
-15° from 67° normalAll-Time Records — Wilmington
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 101°F | August 11, 1895 |
| 2 | 100°F | August 11, 1896 |
| 3 | 96°F | August 11, 1949 |
| 4 | 95°F | August 11, 2010 |
| 5 | 94°F | August 11, 2021 |
| 6 | 93°F | August 11, 2016 |
| 7 | 93°F | August 11, 2005 |
| 8 | 93°F | August 11, 1980 |
| 9 | 92°F | August 11, 1992 |
| 10 | 92°F | August 11, 1988 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 52°F | August 11, 1972 |
| 2 | 53°F | August 11, 1941 |
| 3 | 55°F | August 11, 1974 |
| 4 | 55°F | August 11, 1962 |
| 5 | 57°F | August 11, 1930 |
Heat Wave Summary — Wilmington
threshold: 92°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date106 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1894–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Wilmington
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Aug 3, 1896 – Aug 13, 1896 | 11 | 103°F (Aug 6) | 99°F | 75°F |
| 2 | Aug 26, 1953 – Sep 5, 1953 | 11 | 101°F (Aug 30) | 97°F | 69°F |
| 3 | Jul 25, 1894 – Aug 3, 1894 | 10 | 101°F (Jul 28) | 96°F | 73°F |
| 4 | Jul 12, 1894 – Jul 21, 1894 | 10 | 98°F (Jul 13) | 95°F | 72°F |
| 5 | Aug 5, 1895 – Aug 12, 1895 | 8 | 101°F (Aug 11) | 96°F | 71°F |
| 6 | Aug 3, 1930 – Aug 10, 1930 | 8 | 98°F (Aug 5) | 95°F | 71°F |
| 7 | Jul 19, 1987 – Jul 26, 1987 | 8 | 98°F (Jul 21) | 95°F | 73°F |
| 8 | Jul 7, 1993 – Jul 14, 1993 | 8 | 98°F (Jul 8) | 96°F | 76°F |
| 9 | Jul 28, 2002 – Aug 4, 2002 | 8 | 98°F (Aug 1) | 95°F | 72°F |
| 10 | Jul 25, 1940 – Jul 31, 1940 | 7 | 102°F (Jul 31) | 97°F | 71°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
25th-warmest month on record
22nd-warmest July of 113 on record
+1.0° vs. 77.4° average (1991–2020)Longest 90°F Streak in July
5 consecutive days with highs of at least 90°F (Jul 1–5, 2026, peaking at 103°F)
The longest July streak since 2024 (2 years). The July record is 11 days, set in 1894.
Average July Temperature by Year
1894–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1955 | 81.2°F |
| 2 | 2011 | 80.8°F |
| 3 | 2012 | 80.3°F |
| 4 | 2025 | 80.3°F |
| 5 | 1894 | 80.1°F |
| 6 | 2020 | 80.0°F |
| 7 | 2023 | 80.0°F |
| 8 | 1999 | 80.0°F |
| 9 | 1896 | 80.0°F |
| 10 | 2019 | 79.8°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1955 | 81.2°F |
| 2 | July 2011 | 80.8°F |
| 3 | July 2012 | 80.3°F |
| 4 | July 2025 | 80.3°F |
| 5 | July 1894 | 80.1°F |
| 6 | July 2020 | 80.0°F |
| 7 | July 2023 | 80.0°F |
| 8 | July 1999 | 80.0°F |
| 9 | July 1896 | 80.0°F |
| 10 | July 2019 | 79.8°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Wilmington, DE | 78.4°F | 22nd of 113 |
| Philadelphia Center City, PA | 81.1°F | 17th of 85 |
| Philadelphia, PA | 80.3°F | 18th of 153 |
| Reading, PA | 77.1°F | 30th of 130 |
| Trenton, NJ | 76.4°F | 54th of 132 |