Weather in Key Biscayne, FL
Key Biscayne, Sunday, 18 October, 17:59
Overcast. Feels like 85°. High 83°, low 73°.
Monthly outlook for Key Biscayne, FL: average high 81.4°, average low 75.5°. That is 0.3° above the climate normal for October. Precipitation is expected on 13 days (about 4.7 inches), against a normal of 7 days and 1.8 inches. The warmest day looks like 19 October (84.4°), the coolest 21 October (66.5°).
Ten-day blocks vs climate normal
| Period | Forecast high | Normal | Difference |
|---|---|---|---|
| 18 October – 27 October | 81.4° | 81.2° | +0.1° |
| 28 October – 6 November | 81.5° | 80° | +0.8° |
| 7 November – 16 November | at normal | 78.6° | — |
October records over 66 years
0.06
Key Biscayne, Monday, 19 October
Light rain. High 84°, low 76°.
0.04Key Biscayne, Tuesday, 20 October
Light rain. High 83°, low 72°.
0
Key Biscayne, Wednesday, 21 October
Clear. High 82°, low 66°.
0.03Key Biscayne, Thursday, 22 October
Light rain. High 81°, low 68°.
0.2Key Biscayne, Friday, 23 October
Light rain. High 79°, low 69°.
1.2Key Biscayne, Saturday, 24 October
Rain. High 79°, low 70°.
0.64Key Biscayne, Sunday, 25 October
Rain. High 80°, low 78°.
0.17Key Biscayne, Monday, 26 October
Light rain. High 82°, low 79°.
0.27Key Biscayne, Tuesday, 27 October
Light rain. High 82°, low 80°.
1.1Key Biscayne, Wednesday, 28 October
Rain. High 80°, low 79°.
0.24Key Biscayne, Thursday, 29 October
Rain. High 81°, low 79°.
0.05Key Biscayne, Friday, 30 October
Light rain. High 82°, low 79°.
0.19Key Biscayne, Saturday, 31 October
Light rain. High 82°, low 80°.
0.04Key Biscayne, Sunday, 1 November
Light rain. High 82°, low 79°.
0.08Key Biscayne, Monday, 2 November
Light rain. High 82°, low 80°.
0.14
Key Biscayne, Tuesday, 3 November
Climate normal for this date — 60-year average.
0.13Key Biscayne, Wednesday, 4 November
Climate normal for this date — 60-year average.
0.16Key Biscayne, Thursday, 5 November
Climate normal for this date — 60-year average.
0.08Key Biscayne, Friday, 6 November
Climate normal for this date — 60-year average.
0.07
Key Biscayne, Saturday, 7 November
Climate normal for this date — 60-year average.
0.11Key Biscayne, Sunday, 8 November
Climate normal for this date — 60-year average.
0.12Key Biscayne, Monday, 9 November
Climate normal for this date — 60-year average.
0.08Key Biscayne, Tuesday, 10 November
Climate normal for this date — 60-year average.
0.06Key Biscayne, Wednesday, 11 November
Climate normal for this date — 60-year average.
0.04Key Biscayne, Thursday, 12 November
Climate normal for this date — 60-year average.
0.06Key Biscayne, Friday, 13 November
Climate normal for this date — 60-year average.
0.09Key Biscayne, Saturday, 14 November
Climate normal for this date — 60-year average.
0.15Key Biscayne, Sunday, 15 November
Climate normal for this date — 60-year average.
0.19Key Biscayne, Monday, 16 November
Climate normal for this date — 60-year average.
About the monthly outlook
How accurate is a 30-day forecast?
The first 16 days come from weather models — reliable for the first 3–5 days and progressively less so after that. Days 17 through 30 for Key Biscayne, FL are built from the climate normal, the 60-year average, so they show typical weather for those dates rather than a specific forecast.
What does "above normal" mean?
We compare the forecast against the climate normal for those exact calendar days, computed from 60 years of observations. The deviation shows how much the coming month differs from a typical one.
Where do the 66-year records come from?
They are real temperature extremes recorded in Key Biscayne, FL since 1960: the highest and lowest reading for each calendar date, with the year it happened.
How often is it updated?
The forecast portion refreshes every hour; the climate portion is based on long-term data and stays stable.
Sun and moon today
Weather history
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