Key West climate

Key West Weather in May

NOAA 1991-2020 normals for Key W WFO, 0.6 km from Key West

Average highs run from 85°F on May 1 to 86°F on May 31, and lows from 73°F to 75°F. Normal precipitation for the month is 3.71 in over about 8 wet days.

May day by day

The normal high and low for each date, and the record, in °F.

Normal daily high and low temperature at Key West, in °F, with the record for each date.60708090100151015202530
  • Normal low
  • Normal high
  • Record high
  • Record low

May at a glance

Average high
86°F
Average low
74°F
Precipitation
3.71 in
Record high
94°FMay 14, 2019
Record low
63°FMay 8, 2016
Chance of a freeze
0%
Days of 90°F or more
0.9
Daylight
13 h 05 min to 13 h 34 min
Cloud cover
42%
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.

DateNormal highNormal lowRecord highRecord lowChance wet
May 185°F73°F88°F 196464°F 199221%
May 285°F73°F88°F 196465°F 199221%
May 385°F73°F88°F 196465°F 199922%
May 485°F73°F89°F 199469°F 198822%
May 585°F73°F90°F 202664°F 199222%
May 685°F73°F89°F 197867°F 199223%
May 785°F73°F89°F 202667°F 200823%
May 885°F73°F92°F 202663°F 201624%
May 985°F74°F89°F 199564°F 199224%
May 1085°F74°F90°F 202466°F 196025%
May 1185°F74°F89°F 199468°F 196025%
May 1285°F74°F90°F 202469°F 195826%
May 1386°F74°F90°F 199569°F 198826%
May 1486°F74°F94°F 201967°F 200627%
May 1586°F74°F92°F 202469°F 196027%
May 1686°F74°F92°F 202466°F 195128%
May 1786°F74°F91°F 202467°F 195128%
May 1886°F74°F93°F 202467°F 195129%
May 1986°F74°F92°F 202466°F 200629%
May 2086°F74°F90°F 195367°F 200629%
May 2186°F74°F91°F 202371°F 198830%
May 2286°F74°F92°F 202369°F 200930%
May 2386°F75°F92°F 202570°F 199430%
May 2486°F75°F91°F 194970°F 199231%
May 2586°F75°F91°F 198970°F 199231%
May 2686°F75°F91°F 198968°F 199231%
May 2786°F75°F91°F 195371°F 195932%
May 2886°F75°F91°F 195270°F 198332%
May 2986°F75°F92°F 202471°F 196332%
May 3086°F75°F91°F 194971°F 196032%
May 3186°F75°F91°F 195172°F 196033%

Chance of rain

The chance of at least 0.01 inch of precipitation on each date at Key West, in percent.0102030401102030
  • Chance of a wet day

Sunrise and sunset

Times for 2026, local time (EDT).

May 1
sunrise 6:52 AM, sunset 7:57 PM
May 31
sunrise 6:38 AM, sunset 8:12 PM

Every day of May: sun and moon

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.