Boston, MA
Massachusetts · Records since 1872–2026
Records for August 11
🔥 Record High
August 11, 1944
+18° from 81° normal❄ Record Low
August 11, 1879
-12° from 66° normalAll-Time Records — Boston
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 99°F | August 11, 1944 |
| 2 | 96°F | August 11, 2016 |
| 3 | 95°F | August 11, 1900 |
| 4 | 94°F | August 11, 2020 |
| 5 | 94°F | August 11, 1892 |
| 6 | 93°F | August 11, 2021 |
| 7 | 93°F | August 11, 1988 |
| 8 | 93°F | August 11, 1907 |
| 9 | 92°F | August 11, 2005 |
| 10 | 92°F | August 11, 1961 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 54°F | August 11, 1879 |
| 2 | 55°F | August 11, 1894 |
| 3 | 56°F | August 11, 2007 |
| 4 | 57°F | August 11, 1972 |
| 5 | 57°F | August 11, 1938 |
Heat Wave Summary — Boston
threshold: 90°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date104 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1872–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Boston
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 3, 1912 – Jul 11, 1912 | 9 | 99°F (Jul 9) | 93°F | 70°F |
| 2 | Aug 10, 1944 – Aug 17, 1944 | 8 | 101°F (Aug 12) | 97°F | 73°F |
| 3 | Aug 11, 2002 – Aug 18, 2002 | 8 | 101°F (Aug 14) | 95°F | 74°F |
| 4 | Jun 28, 1872 – Jul 5, 1872 | 8 | 98°F (Jul 1) | 94°F | 70°F |
| 5 | Jul 19, 1994 – Jul 26, 1994 | 8 | 97°F (Jul 21) | 92°F | 72°F |
| 6 | Jul 19, 2022 – Jul 25, 2022 | 7 | 100°F (Jul 24) | 94°F | 74°F |
| 7 | Jul 15, 1983 – Jul 21, 1983 | 7 | 99°F (Jul 16) | 94°F | 72°F |
| 8 | Jul 14, 2013 – Jul 20, 2013 | 7 | 99°F (Jul 19) | 94°F | 75°F |
| 9 | Jun 27, 1901 – Jul 3, 1901 | 7 | 97°F (Jun 28) | 94°F | 73°F |
| 10 | Aug 9, 1988 – Aug 15, 1988 | 7 | 96°F (Aug 15) | 93°F | 73°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
39th-warmest month on record
32nd-warmest July of 155 on record
+0.4° vs. 74.3° 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 2022 (4 years). The July record is 9 days, set in 1912.
Average July Temperature by Year
1872–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2019 | 78.7°F |
| 2 | 1983 | 78.0°F |
| 3 | 2022 | 77.5°F |
| 4 | 1952 | 77.5°F |
| 5 | 1994 | 77.5°F |
| 6 | 2011 | 77.3°F |
| 7 | 2010 | 77.2°F |
| 8 | 1955 | 77.2°F |
| 9 | 1911 | 77.1°F |
| 10 | 2013 | 77.1°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2019 | 78.7°F |
| 2 | July 1983 | 78.0°F |
| 3 | July 2022 | 77.5°F |
| 4 | July 1952 | 77.5°F |
| 5 | July 1994 | 77.5°F |
| 6 | August 2018 | 77.4°F |
| 7 | July 2011 | 77.3°F |
| 8 | July 2010 | 77.2°F |
| 9 | July 1955 | 77.2°F |
| 10 | July 1911 | 77.1°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Boston, MA | 74.7°F | 32nd of 155 |
| Milton, MA | 73.2°F | 23rd of 134 |
| Worcester, MA | 70.9°F | 65th of 134 |
| Providence, RI | 74.3°F | 35th of 122 |
| Manchester, NH | 72.7°F | 27th of 69 |