As of 18:18 EDT

Key Biscayne, FL weather in July

90°

Key Biscayne, Saturday, 8 August, 18:18

Light rain. Feels like 103°. High 92°, low 80°.

Pressure30.00 inHg

Wind1 mph E

Humidity70%

Visibility6.2 mi

Dew point78°

See detailed hourly forecast

In July, Key Biscayne, FL averages a high of 85.8° and a low of 78.3°. About 4.4 inches of precipitation fall over the month (21 wet days). The record high is 93.7° (2023) and the record low 72.5° (1976). Normals are computed over the last 60 years.

Day	High	Low	Chance of precip.	Record high	Record low
1	85.3°	77.5°	72%	91.2° (2020)	73° (2025)
2	85.1°	77.5°	78%	91.4° (1998)	74.5° (1975)
3	85.3°	77.7°	85%	91.9° (1998)	73.9° (2002)
4	85.5°	78.1°	72%	91° (2020)	74.5° (1975)
5	85.5°	78.3°	62%	89.6° (2020)	75° (1973)
6	85.6°	78.4°	58%	90.1° (1963)	74.5° (1977)
7	85.6°	78.3°	65%	90.9° (1963)	74.5° (2025)
8	85.6°	78.1°	60%	91.9° (2023)	74.8° (1968)
9	85.6°	78.1°	60%	91.4° (2020)	73.6° (1976)
10	85.6°	78.1°	72%	92.1° (1963)	72.5° (1976)
11	85.8°	78.3°	65%	91.6° (2023)	74.1° (1976)
12	86°	77.9°	65%	93° (2023)	74.3° (1971)
13	86°	78.1°	67%	92.3° (1969)	74.8° (1985)
14	85.6°	78.1°	70%	91.4° (1980)	74.1° (2022)
15	85.6°	78.3°	67%	90.9° (1981)	74.5° (2022)
16	86°	78.3°	72%	93° (2023)	72.7° (2022)
17	85.8°	78.3°	67%	91° (1981)	74.1° (2013)
18	85.8°	78.6°	67%	90.1° (2024)	75.2° (2013)
19	85.8°	78.8°	65%	90° (1993)	75° (1994)
20	85.8°	78.6°	70%	91.2° (2025)	75.6° (1972)
21	86°	78.4°	80%	91.9° (2018)	75.4° (1985)
22	85.5°	78.1°	70%	91.6° (2023)	73.4° (1965)
23	85.6°	77.9°	73%	93° (2023)	73.8° (1974)
24	86.2°	78.3°	70%	92.8° (2023)	74.7° (1966)
25	86.2°	78.6°	50%	93.7° (2023)	75.4° (1991)
26	85.8°	78.4°	67%	90.9° (1983)	75.6° (1965)
27	86.4°	78.4°	48%	90.5° (1990)	74.7° (2020)
28	86.4°	78.6°	55%	91.6° (1999)	75.4° (2021)
29	86.4°	78.6°	63%	91.9° (1990)	76.3° (2018)
30	86.5°	78.8°	62%	92.1° (2025)	72.9° (2019)
31	86.7°	78.8°	70%	92.5° (2023)	74.8° (1976)