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As of 19:16 EDT

Key Biscayne, FL weather in September

89°Current weather

Key Biscayne, Saturday, 8 August, 19:16

Clear. Feels like 101°. High 92°, low 80°.

Pressure30.03 inHg
Wind1 mph N
Humidity73%
Visibility6.2 mi
Dew point78°

In September, Key Biscayne, FL averages a high of 84.6° and a low of 77.4°. About 6.1 inches of precipitation fall over the month (22 wet days). The record high is 91.6° (2023) and the record low 66.6° (2022). Normals are computed over the last 60 years.

DayHighLowChance of precip.Record highRecord low
185.6°78.1°77%91.2° (2023)74.8° (2022)
285.1°78.1°73%90° (2025)74.3° (2021)
384.9°77.9°77%90.9° (2022)75.2° (1967)
485.3°77.9°75%90.9° (2020)74.3° (1967)
584.9°77.9°87%90.5° (2022)73.6° (2021)
684.9°77.5°80%90.9° (2022)73.8° (2021)
784.9°77.5°75%88.9° (2022)73.6° (2021)
885.1°77.5°77%89.6° (1964)73° (2023)
985.1°77.7°68%90.1° (2012)72.9° (2018)
1085.1°77.7°72%90.3° (2023)73.8° (2018)
1184.7°77.5°85%89.2° (2023)71.1° (1980)
1284.6°77.5°78%90.1° (2023)73.9° (1980)
1384.6°77.4°72%91.6° (2023)73.6° (2022)
1484.7°77.5°65%89.4° (2023)72.5° (2025)
1584.7°77.5°68%89.2° (2023)74.3° (1965)
1684.7°77.5°67%89.1° (2019)72.5° (2001)
1784.7°77.7°63%89.8° (2019)73.8° (1985)
1884.4°77.4°82%88.5° (2024)72.9° (1985)
1984.6°77.2°78%88.2° (2016)73.4° (1976)
2084.2°77.2°80%87.4° (2006)73° (2024)
2184.4°77.2°75%90° (1989)72.7° (2024)
2284.4°77.2°75%87.3° (2024)73° (2023)
2384°77°75%90.3° (2022)73.2° (2023)
2484°77°77%88.3° (2024)73.6° (1968)
2583.8°77°77%87.4° (2018)72° (2019)
2684°77.2°65%88.3° (2018)74.5° (1967)
2784°77°72%88° (2006)73° (1983)
2883.7°77°73%88.9° (2018)72.3° (1983)
2983.8°76.8°70%88.2° (2024)71.2° (1983)
3083.8°76.3°72%89.6° (2025)66.6° (2022)

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