Allentown, PA
Pennsylvania · Records since 1922–2026
Records for August 11
🔥 Record High
August 11, 1949
+12° from 85° normal❄ Record Low
August 11, 1972
-17° from 64° normalAll-Time Records — Allentown
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 97°F | August 11, 1949 |
| 2 | 95°F | August 11, 1944 |
| 3 | 95°F | August 11, 1926 |
| 4 | 94°F | August 11, 2002 |
| 5 | 94°F | August 11, 1988 |
| 6 | 93°F | August 11, 2016 |
| 7 | 93°F | August 11, 2010 |
| 8 | 93°F | August 11, 1966 |
| 9 | 92°F | August 11, 2021 |
| 10 | 92°F | August 11, 2005 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 47°F | August 11, 1972 |
| 2 | 51°F | August 11, 1941 |
| 3 | 52°F | August 11, 1930 |
| 4 | 53°F | August 11, 2008 |
| 5 | 53°F | August 11, 1954 |
Heat Wave Summary — Allentown
threshold: 91°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date89 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1922–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Allentown
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jun 18, 1923 – Jun 26, 1923 | 9 | 100°F (Jun 20) | 96°F | 68°F |
| 2 | Jul 15, 1955 – Jul 23, 1955 | 9 | 100°F (Jul 22) | 95°F | 67°F |
| 3 | Jul 28, 2002 – Aug 5, 2002 | 9 | 99°F (Aug 2) | 94°F | 69°F |
| 4 | Aug 11, 2002 – Aug 19, 2002 | 9 | 99°F (Aug 14) | 95°F | 67°F |
| 5 | Jun 20, 1943 – Jun 28, 1943 | 9 | 98°F (Jun 26) | 94°F | 68°F |
| 6 | Jul 17, 2011 – Jul 24, 2011 | 8 | 104°F (Jul 22) | 96°F | 71°F |
| 7 | Aug 27, 1953 – Sep 3, 1953 | 8 | 99°F (Aug 31) | 97°F | 66°F |
| 8 | Aug 2, 1930 – Aug 9, 1930 | 8 | 98°F (Aug 4) | 94°F | 67°F |
| 9 | Aug 10, 1944 – Aug 17, 1944 | 8 | 98°F (Aug 12) | 96°F | 68°F |
| 10 | Aug 28, 1973 – Sep 4, 1973 | 8 | 97°F (Aug 28) | 94°F | 69°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
45th-warmest month on record
34th-warmest July of 103 on record
+0.4° vs. 74.8° average (1991–2020)Longest 90°F Streak in July
4 consecutive days with highs of at least 90°F (Jul 1–4, 2026, peaking at 101°F)
The longest July streak since 2024 (2 years). The July record is 15 days, set in 1966.
100°F Milestone
Allentown reached 101°F in 2026 — the first time it hit 100°F since 2011 (15 years).
Average July Temperature by Year
1924–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 1955 | 79.0°F |
| 2 | 1949 | 78.3°F |
| 3 | 1999 | 78.0°F |
| 4 | 2011 | 78.0°F |
| 5 | 2020 | 78.0°F |
| 6 | 2019 | 77.9°F |
| 7 | 1988 | 77.9°F |
| 8 | 1994 | 77.6°F |
| 9 | 2012 | 77.5°F |
| 10 | 2025 | 77.3°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 1955 | 79.0°F |
| 2 | July 1949 | 78.3°F |
| 3 | August 1980 | 78.2°F |
| 4 | July 1999 | 78.0°F |
| 5 | July 2011 | 78.0°F |
| 6 | July 2020 | 78.0°F |
| 7 | July 2019 | 77.9°F |
| 8 | July 1988 | 77.9°F |
| 9 | July 1994 | 77.6°F |
| 10 | July 2012 | 77.5°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Allentown, PA | 75.2°F | 34th of 103 |
| Belvidere, NJ | 74.4°F | 39th of 113 |
| Reading, PA | 77.1°F | 30th of 130 |
| Mount Pocono, PA | 68.8°F | 23rd of 113 |
| Trenton, NJ | 76.4°F | 54th of 132 |