Marathon, FL
Florida · Records since 1950–2026
Records for August 11
🔥 Record High
August 11, 1987
+5° from 92° normal❄ Record Low
August 11, 1953
-10° from 80° normalAll-Time Records — Marathon
Top 10 Record Highs — August 11
| # | Temp | Date |
|---|---|---|
| 🏆 | 97°F | August 11, 1987 |
| 2 | 97°F | August 11, 1985 |
| 3 | 95°F | August 11, 2023 |
| 4 | 95°F | August 11, 2015 |
| 5 | 94°F | August 11, 1998 |
| 6 | 94°F | August 11, 1970 |
| 7 | 94°F | August 11, 1954 |
| 8 | 94°F | August 11, 1952 |
| 9 | 93°F | August 11, 2022 |
| 10 | 93°F | August 11, 2020 |
Top 5 Record Lows — August 11
| # | Temp | Date |
|---|---|---|
| 🥶 | 70°F | August 11, 1953 |
| 2 | 71°F | August 11, 1966 |
| 3 | 73°F | August 11, 1994 |
| 4 | 73°F | August 11, 1952 |
| 5 | 74°F | August 11, 2018 |
Heat Wave Summary — Marathon
threshold: 93°F (90th percentile of historical Jun–Aug highs)2026 Daily High Temperature vs Normal
Year to date40 of 222 days with data were above the 1991–2020 normal high for their date.
Days ≥ 90°F Per Year
1950–2026Average Daily High by Decade
Full year · complete decades only
Longest Heat Waves — Marathon
| # | Dates | Days | Peak | Avg High | Avg Overnight Low |
|---|---|---|---|---|---|
| 🏆 | Jun 29, 2023 – Jul 25, 2023 | 27 | 99°F (Jul 13) | 96°F | 84°F |
| 2 | Aug 30, 2022 – Sep 17, 2022 | 19 | 96°F (Sep 2) | 94°F | 81°F |
| 3 | Jul 29, 2015 – Aug 14, 2015 | 17 | 95°F (Aug 8) | 94°F | 81°F |
| 4 | Jul 12, 2009 – Jul 27, 2009 | 16 | 96°F (Jul 24) | 94°F | 82°F |
| 5 | Jun 23, 2020 – Jul 8, 2020 | 16 | 95°F (Jul 5) | 94°F | 82°F |
| 6 | Jun 29, 2022 – Jul 14, 2022 | 16 | 95°F (Jul 12) | 94°F | 82°F |
| 7 | Jun 1, 2019 – Jun 15, 2019 | 15 | 98°F (Jun 8) | 96°F | 84°F |
| 8 | Aug 15, 2022 – Aug 28, 2022 | 14 | 96°F (Aug 19) | 95°F | 82°F |
| 9 | Jun 27, 2015 – Jul 10, 2015 | 14 | 94°F (Jun 30) | 93°F | 82°F |
| 10 | Jul 27, 2002 – Aug 7, 2002 | 12 | 97°F (Aug 2) | 95°F | 82°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
31st-warmest month on record
13th-warmest July of 67 on record
+0.6° vs. 85.3° average (1991–2020)Longest 90°F Streak in July
4 consecutive days with highs of at least 90°F (Jul 7–10, 2026, peaking at 91°F)
The longest July streak since 2025 (1 year). The July record is 31 days, set in 2009.
Average July Temperature by Year
1950–2026 · 2026 highlighted
Warmest Julys on Record
| # | Year | Avg Temp |
|---|---|---|
| 1 | 2023 | 89.5°F |
| 2 | 2009 | 87.6°F |
| 3 | 2022 | 86.9°F |
| 4 | 2015 | 86.8°F |
| 5 | 2019 | 86.6°F |
| 6 | 2002 | 86.6°F |
| 7 | 2024 | 86.6°F |
| 8 | 2018 | 86.5°F |
| 9 | 2014 | 86.4°F |
| 10 | 2017 | 86.4°F |
Warmest Months on Record (Any Month)
| # | Month | Avg Temp |
|---|---|---|
| 1 | July 2023 | 89.5°F |
| 2 | August 2023 | 88.2°F |
| 3 | June 2019 | 88.0°F |
| 4 | July 2009 | 87.6°F |
| 5 | August 2022 | 87.3°F |
| 6 | July 2022 | 86.9°F |
| 7 | July 2015 | 86.8°F |
| 8 | August 1998 | 86.8°F |
| 9 | August 2015 | 86.8°F |
| 10 | August 2017 | 86.8°F |
Nearby Stations — July 2026
How the same month ranked at the closest reporting stations
| Station | Avg Temp | July Rank |
|---|---|---|
| Marathon, FL | 86.0°F | 13th of 67 |
| Key West, FL | 86.2°F | 10th of 153 |
| Miami, FL | 86.2°F | 2nd of 126 |
| Fort Lauderdale, FL | 85.7°F | 1st of 110 |
| Fort Myers, FL | 84.8°F | 8th of 128 |