Key West Weather in March
Average highs run from 78°F on March 1 to 80°F on March 31, and lows from 66°F to 68°F. Normal precipitation for the month is 1.41 in over about 6 wet days.
March day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
March at a glance
- Average high
- 79°F
- Average low
- 67°F
- Precipitation
- 1.41 in
- Record high
- 88°FMar 24, 1994
- Record low
- 47°FMar 3, 1986
- Chance of a freeze
- 0%
- Daylight
- 11 h 41 min to 12 h 23 min
- Cloud cover
- 40%
- Humidity
- 77%
- Dew point
- 66°F
- Wind
- 13.2 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 |
|---|---|---|---|---|---|
| Mar 1 | 78°F | 66°F | 84°F 1987 | 51°F 1984 | 20% |
| Mar 2 | 78°F | 66°F | 86°F 2017 | 53°F 1968 | 20% |
| Mar 3 | 78°F | 66°F | 85°F 1948 | 47°F 1986 | 20% |
| Mar 4 | 78°F | 66°F | 86°F 1948 | 49°F 1980 | 20% |
| Mar 5 | 78°F | 66°F | 86°F 1953 | 53°F 2010 | 20% |
| Mar 6 | 78°F | 66°F | 86°F 2003 | 52°F 1986 | 19% |
| Mar 7 | 78°F | 66°F | 84°F 2003 | 57°F 1960 | 19% |
| Mar 8 | 78°F | 66°F | 86°F 1967 | 55°F 2001 | 19% |
| Mar 9 | 78°F | 66°F | 85°F 1991 | 54°F 1996 | 19% |
| Mar 10 | 78°F | 66°F | 86°F 1948 | 56°F 1996 | 19% |
| Mar 11 | 78°F | 66°F | 87°F 1948 | 54°F 2005 | 19% |
| Mar 12 | 78°F | 66°F | 86°F 1948 | 56°F 1991 | 19% |
| Mar 13 | 79°F | 66°F | 86°F 2026 | 55°F 1959 | 19% |
| Mar 14 | 79°F | 67°F | 86°F 2003 | 54°F 1993 | 19% |
| Mar 15 | 79°F | 67°F | 86°F 1964 | 53°F 1993 | 19% |
| Mar 16 | 79°F | 67°F | 86°F 1964 | 53°F 1988 | 18% |
| Mar 17 | 79°F | 67°F | 85°F 1964 | 53°F 1988 | 18% |
| Mar 18 | 79°F | 67°F | 85°F 2023 | 56°F 1960 | 18% |
| Mar 19 | 79°F | 67°F | 86°F 1953 | 57°F 2010 | 18% |
| Mar 20 | 79°F | 67°F | 86°F 1963 | 56°F 1988 | 18% |
| Mar 21 | 79°F | 67°F | 85°F 1950 | 56°F 1981 | 18% |
| Mar 22 | 79°F | 67°F | 87°F 1977 | 53°F 1996 | 18% |
| Mar 23 | 79°F | 67°F | 87°F 1949 | 53°F 1986 | 17% |
| Mar 24 | 79°F | 68°F | 88°F 1994 | 57°F 1968 | 17% |
| Mar 25 | 80°F | 68°F | 85°F 1948 | 59°F 1968 | 17% |
| Mar 26 | 80°F | 68°F | 86°F 1948 | 59°F 1969 | 17% |
| Mar 27 | 80°F | 68°F | 87°F 1994 | 57°F 2013 | 17% |
| Mar 28 | 80°F | 68°F | 88°F 1994 | 58°F 2013 | 16% |
| Mar 29 | 80°F | 68°F | 87°F 2023 | 60°F 1958 | 16% |
| Mar 30 | 80°F | 68°F | 86°F 1991 | 62°F 1950 | 16% |
| Mar 31 | 80°F | 68°F | 87°F 1991 | 56°F 1950 | 16% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- March 1
- sunrise 6:49 AM, sunset 6:30 PM
- March 31
- sunrise 7:20 AM, sunset 7:43 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USC00084571 (Key W WFO), public domain. Records: NOAA GHCN-Daily, station USW00012836, 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.