Tropical monsoon climate
Climate Key Biscayne - Florida
Annual high82ºF
Annual low71ºF
Precipitation57.1 inch
| Month | HighºF | LowºF | Precipinch |
|---|---|---|---|
| Jan | 75 | 62 | 2.40 |
| Feb | 76 | 64 | 2.26 |
| Mar | 78 | 66 | 3.05 |
| Apr | 81 | 69 | 2.80 |
| May | 83 | 74 | 5.34 |
| Jun | 86 | 77 | 8.98 |
| Jul | 89 | 78 | 5.26 |
| Aug | 89 | 78 | 7.61 |
| Sep | 87 | 77 | 8.53 |
| Oct | 85 | 74 | 5.92 |
| Nov | 80 | 70 | 3.02 |
| Dec | 77 | 65 | 1.93 |
- JanHigh 75ºFLow 62ºFPrecip 2.40 inch
- FebHigh 76ºFLow 64ºFPrecip 2.26 inch
- MarHigh 78ºFLow 66ºFPrecip 3.05 inch
- AprHigh 81ºFLow 69ºFPrecip 2.80 inch
- MayHigh 83ºFLow 74ºFPrecip 5.34 inch
- JunHigh 86ºFLow 77ºFPrecip 8.98 inch
- JulHigh 89ºFLow 78ºFPrecip 5.26 inch
- AugHigh 89ºFLow 78ºFPrecip 7.61 inch
- SepHigh 87ºFLow 77ºFPrecip 8.53 inch
- OctHigh 85ºFLow 74ºFPrecip 5.92 inch
- NovHigh 80ºFLow 70ºFPrecip 3.02 inch
- DecHigh 77ºFLow 65ºFPrecip 1.93 inch
Climate summary
What is the average weather in Key Biscayne, Florida?
Key Biscayne has a tropical monsoon climate, defined by warm winters and hot summers. The area is wet overall, with a strong seasonal pattern where summers are significantly wetter than the drier winter months. Heavy seasonal downpours or afternoon thunderstorms can sometimes occur during the warmer months, contributing to the high annual precipitation.
Key Biscayne weather averages
Annual high82ºF
Annual low71ºF
Precipitation57.1 inch
Daily normals Key Biscayne - Florida - January
| Day | HighºF | LowºF | Prec/ | Prec/ |
|---|---|---|---|---|
| Jan 1 | 78.1 | 63.6 | 0.07 | 0.07 |
| Jan 2 | 78.0 | 63.4 | 0.13 | 0.13 |
| Jan 3 | 77.9 | 63.3 | 0.19 | 0.19 |
| Jan 4 | 77.8 | 63.2 | 0.25 | 0.25 |
| Jan 5 | 77.7 | 63.1 | 0.31 | 0.31 |
| Jan 6 | 77.7 | 63.0 | 0.36 | 0.36 |
| Jan 7 | 77.6 | 62.9 | 0.41 | 0.41 |
| Jan 8 | 77.5 | 62.8 | 0.47 | 0.47 |
| Jan 9 | 77.5 | 62.7 | 0.52 | 0.52 |
| Jan 10 | 77.4 | 62.6 | 0.59 | 0.59 |
| Jan 11 | 77.4 | 62.6 | 0.66 | 0.66 |
| Jan 12 | 77.3 | 62.5 | 0.72 | 0.72 |
| Jan 13 | 77.3 | 62.5 | 0.79 | 0.79 |
| Jan 14 | 77.3 | 62.5 | 0.86 | 0.86 |
| Jan 15 | 77.3 | 62.4 | 0.94 | 0.94 |
| Jan 16 | 77.2 | 62.4 | 1.02 | 1.02 |
| Jan 17 | 77.2 | 62.4 | 1.10 | 1.10 |
| Jan 18 | 77.2 | 62.4 | 1.19 | 1.19 |
| Jan 19 | 77.2 | 62.5 | 1.28 | 1.28 |
| Jan 20 | 77.3 | 62.5 | 1.37 | 1.37 |
| Jan 21 | 77.3 | 62.5 | 1.46 | 1.46 |
| Jan 22 | 77.3 | 62.6 | 1.55 | 1.55 |
| Jan 23 | 77.3 | 62.6 | 1.65 | 1.65 |
| Jan 24 | 77.4 | 62.7 | 1.75 | 1.75 |
| Jan 25 | 77.4 | 62.8 | 1.84 | 1.84 |
| Jan 26 | 77.5 | 62.8 | 1.94 | 1.94 |
| Jan 27 | 77.5 | 62.9 | 2.04 | 2.04 |
| Jan 28 | 77.6 | 63.0 | 2.14 | 2.14 |
| Jan 29 | 77.7 | 63.1 | 2.24 | 2.24 |
| Jan 30 | 77.7 | 63.2 | 2.34 | 2.34 |
| Jan 31 | 77.8 | 63.3 | 2.44 | 2.44 |
Precipitation and snow add up through the month (/mo) and the year (/yr)
Weather history Key Biscayne - October 2026
| Day | HighºF | LowºF | Precip.inch |
|---|---|---|---|
| Oct 1 | 86.0 | 78.1 | 0.45 |
| Oct 2 | 84.0 | 75.9 | 1.58 |
| Oct 3 | – | – | – |
| Oct 4 | – | – | – |
| Oct 5 | – | – | – |
| Oct 6 | 90.0 | 77.0 | 0.00 |
| Oct 7 | 90.0 | 78.1 | 0.05 |
| Oct 8 | 90.0 | 77.0 | 0.55 |
| Oct 9 | 89.1 | 81.0 | 0.00 |
| Oct 10 | 91.0 | 84.0 | 0.00 |
| Oct 11 | 91.0 | 81.0 | 0.19 |
| Oct 12 | 91.0 | 78.1 | 0.00 |
| Oct 13 | 91.0 | 80.1 | 0.00 |
| Oct 14 | 89.1 | 81.0 | 0.00 |
| Oct 15 | 89.1 | 82.0 | 0.00 |
| Oct 16 | 90.0 | 82.9 | 0.02 |
| Oct 17 | 91.0 | 77.0 | 0.42 |
| Oct 18 | 88.0 | 75.9 | 0.72 |
| Oct 19 | 84.0 | 75.9 | 0.31 |
| Oct 20 | – | – | – |
| Oct 21 | 86.0 | 72.0 | 0.07 |
| Oct 22 | 86.0 | 72.0 | 0.00 |
| Oct 23 | 81.0 | 73.0 | T |
| Oct 24 | 82.9 | 73.0 | 0.01 |
| Oct 25 | 86.0 | 72.0 | 0.07 |
| Oct 26 | 84.9 | 73.0 | 0.25 |
| Oct 27 | 84.0 | 78.1 | 0.03 |
| Oct 28 | 84.9 | 75.9 | 0.56 |
| Oct 29 | 87.1 | 79.0 | 0.00 |
| Oct 30 | 88.0 | 77.0 | 0.00 |
| Oct 31 | – | – | – |
The data for October 2026 is incomplete: some days or values are missing.
- –No data
- –Not yet observed or received
- TTrace, too small to measure
Observed extremes
- Highest max temperature91.0ºF · Oct 10
- Lowest max temperature81.0ºF · Oct 23
- Highest min temperature84.0ºF · Oct 10
- Lowest min temperature72.0ºF · Oct 21
Geo Key Biscayne - Florida
Location
- Country
- United States
- State
- Florida
- County
- –
- City
- Key Biscayne
- Zip Code
- 33149
- Elevation
- 3 ft
- Longitude
- -80.16
- Latitude
- 25.69
- ICAO
- –
- IATA
- –