Portland, ME
Maine · Records since 1874–2026
Records for August 11
🔥 Record High
August 11, 1944
+19° from 80° normal❄ Record Low
August 11, 1963
-20° from 61° normalAll-Time Records — Portland
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 99°F | August 11, 1944 |
| 2 | 94°F | August 11, 1900 |
| 3 | 91°F | August 11, 2025 |
| 4 | 91°F | August 11, 2020 |
| 5 | 90°F | August 11, 2016 |
| 6 | 90°F | August 11, 1961 |
| 7 | 89°F | August 11, 1905 |
| 8 | 89°F | August 11, 1896 |
| 9 | 88°F | August 11, 1976 |
| 10 | 88°F | August 11, 1973 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 41°F | August 11, 1963 |
| 2 | 43°F | August 11, 1972 |
| 3 | 47°F | August 11, 1958 |
| 4 | 48°F | August 11, 1994 |
| 5 | 48°F | August 11, 1979 |
Heat Wave Summary — Portland
threshold: 86°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
1874–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Portland
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jul 6, 1988 – Jul 13, 1988 | 8 | 93°F (Jul 11) | 90°F | 65°F |
| 2 | Aug 12, 2002 – Aug 19, 2002 | 8 | 93°F (Aug 14) | 89°F | 66°F |
| 3 | Jul 15, 1991 – Jul 21, 1991 | 7 | 96°F (Jul 21) | 91°F | 65°F |
| 4 | Aug 5, 1876 – Aug 11, 1876 | 7 | 95°F (Aug 7) | 90°F | 68°F |
| 5 | Jul 13, 1952 – Jul 19, 1952 | 7 | 94°F (Jul 14) | 91°F | 62°F |
| 6 | Jul 23, 1970 – Jul 29, 1970 | 7 | 93°F (Jul 24) | 90°F | 64°F |
| 7 | Jul 24, 2020 – Jul 30, 2020 | 7 | 93°F (Jul 27) | 90°F | 70°F |
| 8 | Aug 11, 1944 – Aug 16, 1944 | 6 | 99°F (Aug 11) | 95°F | 68°F |
| 9 | Jul 16, 1977 – Jul 21, 1977 | 6 | 99°F (Jul 21) | 92°F | 65°F |
| 10 | Jul 6, 1993 – Jul 11, 1993 | 6 | 98°F (Jul 10) | 92°F | 67°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
32nd-warmest month on record
22nd-warmest July of 153 on record
+1.2° vs. 69.8° average (1991–2020)Longest 90°F Streak in July
2 consecutive days with highs of at least 90°F (Jul 2–3, 2026, peaking at 96°F)
Ties the longest July streak since 2024 (2 years). The July record is 5 days, set in 1993.
Average July Temperature by Year
1874–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2020 | 73.7°F |
| 2 | 2024 | 73.1°F |
| 3 | 1876 | 73.1°F |
| 4 | 2019 | 73.1°F |
| 5 | 1878 | 73.0°F |
| 6 | 2011 | 72.7°F |
| 7 | 1994 | 72.4°F |
| 8 | 2010 | 72.2°F |
| 9 | 2022 | 72.2°F |
| 10 | 2006 | 71.9°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2020 | 73.7°F |
| 2 | July 2024 | 73.1°F |
| 3 | July 1876 | 73.1°F |
| 4 | July 2019 | 73.1°F |
| 5 | July 1878 | 73.0°F |
| 6 | July 2011 | 72.7°F |
| 7 | August 1937 | 72.5°F |
| 8 | July 1994 | 72.4°F |
| 9 | July 2010 | 72.2°F |
| 10 | July 2022 | 72.2°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Portland, ME | 71.0°F | 22nd of 153 |
| Concord, NH | 71.7°F | 33rd of 158 |
| Manchester, NH | 72.7°F | 27th of 69 |
| Boston, MA | 74.7°F | 32nd of 155 |
| Milton, MA | 73.2°F | 23rd of 134 |