Key Biscayne Weather in January
Average highs run from 78°F on January 1 to 78°F on January 31, and lows from 64°F to 63°F. Normal precipitation for the month is 2.44 in over about 8 wet days.
January day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
January at a glance
- Average high
- 78°F
- Average low
- 63°F
- Precipitation
- 2.44 in
- Record high
- 88°FJan 19, 1987
- Record low
- 30°FJan 22, 1985
- Chance of a freeze
- 0%
- Daylight
- 10 h 35 min to 10 h 59 min
- Cloud cover
- 55%
- Humidity
- 76%
- Dew point
- 64°F
- Wind
- 13.4 mph
Every day of the month
A wet day has at least 0.01 inch of precipitation.
| Date | Normal high | Normal low | Record high | Record low | Chance wet |
|---|---|---|---|---|---|
| Jan 1 | 78°F | 64°F | 87°F 1982 | 42°F 1949 | 24% |
| Jan 2 | 78°F | 63°F | 86°F 1996 | 39°F 1949 | 24% |
| Jan 3 | 78°F | 63°F | 86°F 1967 | 38°F 1962 | 24% |
| Jan 4 | 78°F | 63°F | 87°F 2020 | 42°F 2002 | 24% |
| Jan 5 | 78°F | 63°F | 86°F 2023 | 39°F 2001 | 24% |
| Jan 6 | 78°F | 63°F | 86°F 1990 | 40°F 2010 | 24% |
| Jan 7 | 78°F | 63°F | 87°F 2017 | 44°F 2010 | 24% |
| Jan 8 | 78°F | 63°F | 86°F 1990 | 38°F 1970 | 24% |
| Jan 9 | 78°F | 63°F | 84°F 1997 | 36°F 1951 | 24% |
| Jan 10 | 77°F | 63°F | 84°F 1971 | 35°F 1970 | 24% |
| Jan 11 | 77°F | 63°F | 84°F 2000 | 36°F 2010 | 24% |
| Jan 12 | 77°F | 63°F | 87°F 2024 | 33°F 1982 | 24% |
| Jan 13 | 77°F | 63°F | 86°F 2024 | 32°F 1981 | 25% |
| Jan 14 | 77°F | 63°F | 86°F 1980 | 37°F 1964 | 25% |
| Jan 15 | 77°F | 62°F | 83°F 1957 | 34°F 1948 | 25% |
| Jan 16 | 77°F | 62°F | 85°F 1954 | 42°F 1948 | 25% |
| Jan 17 | 77°F | 62°F | 85°F 1989 | 39°F 1965 | 25% |
| Jan 18 | 77°F | 62°F | 84°F 1987 | 35°F 1965 | 25% |
| Jan 19 | 77°F | 63°F | 88°F 1987 | 36°F 1977 | 25% |
| Jan 20 | 77°F | 63°F | 86°F 1987 | 31°F 1977 | 25% |
| Jan 21 | 77°F | 63°F | 85°F 1953 | 34°F 1985 | 25% |
| Jan 22 | 77°F | 63°F | 87°F 2017 | 30°F 1985 | 25% |
| Jan 23 | 77°F | 63°F | 88°F 2023 | 36°F 1985 | 25% |
| Jan 24 | 77°F | 63°F | 84°F 1990 | 36°F 2003 | 25% |
| Jan 25 | 77°F | 63°F | 84°F 1987 | 44°F 2003 | 25% |
| Jan 26 | 78°F | 63°F | 88°F 2026 | 38°F 1968 | 25% |
| Jan 27 | 78°F | 63°F | 88°F 1984 | 43°F 1951 | 25% |
| Jan 28 | 78°F | 63°F | 87°F 1991 | 36°F 1986 | 25% |
| Jan 29 | 78°F | 63°F | 84°F 1949 | 37°F 1986 | 25% |
| Jan 30 | 78°F | 63°F | 86°F 1991 | 39°F 1966 | 25% |
| Jan 31 | 78°F | 63°F | 86°F 1991 | 35°F 1966 | 25% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EST).
- January 1
- sunrise 7:07 AM, sunset 5:42 PM
- January 31
- sunrise 7:05 AM, sunset 6:04 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00081306 (Cape Florida), public domain. Records: NOAA GHCN-Daily, station USW00012839, every year on file, quality-flagged values removed. Cloud, humidity, wind and sunshine: NASA POWER (MERRA-2, CERES and GEWEX SRB), 1991-2020. The data was obtained from the National Aeronautics and Space Administration (NASA) Langley Research Center's Prediction Of Worldwide Energy Resources (POWER) project funded through the NASA Earth Science Division: POWER Daily API v2, accessed 2026-09-24. Sun and moon: computed with the NOAA solar equations and Meeus.