Key Colony Beach Weather in May
Average highs run from 86°F on May 1 to 89°F on May 31, and lows from 74°F to 77°F. Normal precipitation for the month is 3.36 in over about 8 wet days.
May day by day
The normal high and low for each date, and the record, in °F.
- Normal low
- Normal high
- Record high
- Record low
May at a glance
- Average high
- 88°F
- Average low
- 76°F
- Precipitation
- 3.36 in
- Record high
- 96°FMay 14, 2019
- Record low
- 64°FMay 8, 2016
- Chance of a freeze
- 0%
- Days of 90°F or more
- 7.4
- Daylight
- 13 h 05 min to 13 h 34 min
- Cloud cover
- 45%
- Humidity
- 76%
- Dew point
- 72°F
- Wind
- 11.6 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 |
|---|---|---|---|---|---|
| May 1 | 86°F | 74°F | 89°F 2002 | 69°F 2006 | 20% |
| May 2 | 86°F | 75°F | 93°F 2019 | 69°F 1999 | 20% |
| May 3 | 86°F | 75°F | 92°F 2019 | 69°F 1999 | 21% |
| May 4 | 86°F | 75°F | 92°F 2019 | 67°F 2006 | 21% |
| May 5 | 86°F | 75°F | 95°F 2019 | 69°F 2006 | 21% |
| May 6 | 86°F | 75°F | 95°F 2019 | 69°F 2016 | 22% |
| May 7 | 86°F | 75°F | 92°F 2019 | 68°F 2016 | 22% |
| May 8 | 87°F | 75°F | 93°F 2019 | 64°F 2016 | 22% |
| May 9 | 87°F | 75°F | 92°F 2019 | 67°F 2001 | 23% |
| May 10 | 87°F | 75°F | 92°F 2019 | 67°F 2020 | 23% |
| May 11 | 87°F | 75°F | 92°F 2008 | 69°F 2005 | 23% |
| May 12 | 87°F | 75°F | 95°F 2019 | 72°F 2022 | 24% |
| May 13 | 87°F | 76°F | 95°F 2019 | 72°F 2001 | 24% |
| May 14 | 87°F | 76°F | 96°F 2019 | 70°F 2001 | 25% |
| May 15 | 87°F | 76°F | 92°F 1998 | 72°F 2007 | 25% |
| May 16 | 88°F | 76°F | 91°F 2011 | 70°F 2001 | 26% |
| May 17 | 88°F | 76°F | 94°F 2010 | 69°F 2001 | 26% |
| May 18 | 88°F | 76°F | 93°F 2016 | 69°F 2001 | 27% |
| May 19 | 88°F | 76°F | 93°F 2008 | 71°F 1998 | 27% |
| May 20 | 88°F | 76°F | 92°F 2008 | 69°F 2006 | 27% |
| May 21 | 88°F | 76°F | 92°F 2008 | 73°F 2005 | 28% |
| May 22 | 88°F | 76°F | 93°F 2008 | 72°F 2021 | 28% |
| May 23 | 88°F | 77°F | 92°F 2008 | 71°F 2014 | 28% |
| May 24 | 89°F | 77°F | 92°F 2008 | 72°F 2014 | 29% |
| May 25 | 89°F | 77°F | 92°F 2003 | 72°F 2001 | 29% |
| May 26 | 89°F | 77°F | 93°F 2017 | 72°F 2004 | 29% |
| May 27 | 89°F | 77°F | 93°F 2017 | 72°F 2004 | 30% |
| May 28 | 89°F | 77°F | 93°F 2017 | 73°F 2008 | 30% |
| May 29 | 89°F | 77°F | 92°F 2017 | 74°F 2013 | 30% |
| May 30 | 89°F | 77°F | 92°F 2005 | 71°F 1999 | 31% |
| May 31 | 89°F | 77°F | 93°F 2005 | 73°F 1999 | 31% |
Chance of rain
- Chance of a wet day
Sunrise and sunset
Times for 2026, local time (EDT).
- May 1
- sunrise 6:49 AM, sunset 7:54 PM
- May 31
- sunrise 6:35 AM, sunset 8:09 PM
Other months
Sources
Normals: NOAA NCEI U.S. Climate Normals, 1991-2020, station USW00012896 (Marathon AP), public domain. Records: NOAA GHCN-Daily, station USW00012896, 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.