Climateby Month

Key West vs Miami weather

Key West, FL and Miami, FL · 130 mi apart

July highs: 90°F in Key West, 91°F in Miami (Miami is 1°F warmer). January highs: 76°F and 76°F. Key West has about 107 wet days a year, Miami about 141. Muggy days: about 284 a year in Key West, about 251 in Miami.

Key West, FL

60°70°80°90°100° January: normal high 76°F (24°C), low 66°F (19°C) 76° 66° February: normal high 77°F (25°C), low 67°F (19°C) March: normal high 80°F (27°C), low 69°F (21°C) April: normal high 83°F (28°C), low 73°F (23°C) May: normal high 86°F (30°C), low 76°F (24°C) June: normal high 89°F (32°C), low 79°F (26°C) July: normal high 90°F (32°C), low 81°F (27°C) August: normal high 91°F (33°C), low 81°F (27°C) 91° 81° September: normal high 89°F (32°C), low 79°F (26°C) October: normal high 86°F (30°C), low 77°F (25°C) November: normal high 81°F (27°C), low 72°F (22°C) December: normal high 78°F (26°C), low 68°F (20°C) JFMAMJJASOND

Best months: January, February, March

Miami, FL

60°70°80°90°100° January: normal high 76°F (24°C), low 61°F (16°C) 76° 61° February: normal high 78°F (26°C), low 63°F (17°C) March: normal high 81°F (27°C), low 66°F (19°C) April: normal high 84°F (29°C), low 70°F (21°C) May: normal high 87°F (31°C), low 73°F (23°C) June: normal high 89°F (32°C), low 76°F (24°C) July: normal high 91°F (33°C), low 78°F (26°C) 91° 78° August: normal high 91°F (33°C), low 78°F (26°C) September: normal high 89°F (32°C), low 77°F (25°C) October: normal high 86°F (30°C), low 74°F (23°C) November: normal high 81°F (27°C), low 68°F (20°C) December: normal high 78°F (26°C), low 64°F (18°C) JFMAMJJASOND

Best months: January, February, March

Which city for what

  • Fewer wet days: Key West (107 a year vs 141 a year)
  • Less humid: Miami (251 muggy days vs 284 muggy days)
  • More comfortable days: Miami (52 a year vs 37 a year)

Listed only where the difference is at least 3°F in highs, 10 days a year or 3 in of snow.

Season by season

SeasonAvg high Key WestAvg high MiamiWet days Key WestWet days Miami
Winter (Dec-Feb)77°F78°F1822
Spring (Mar-May)83°F84°F1724
Summer (Jun-Aug)90°F90°F3754
Fall (Sep-Nov)85°F85°F3441

Side by side over a year

Key WestMiami
Hot days (90°F+)5692
Freezing nights00
Muggy days284251
Comfortable days3752
Precipitation40.4 in67.4 in
Snowfall–0.0 in
Frost datesfrost-freefrost-free
Daylight in June / December13.6 h / 10.6 h13.7 h / 10.6 h
Best monthsJanuary, February, MarchJanuary, February, March

Day counts from each city's daily records, 1991-2020. Comfortable days: highs 65-80°F and dew point under 60°F.

Month by month

MonthHigh Key WestHigh MiamiWet days Key WestWet days Miami
January76°F76°F78
February77°F78°F57
March80°F81°F56
April83°F84°F57
May86°F87°F811
June89°F89°F1118
July90°F91°F1217
August91°F91°F1519
September89°F89°F1618
October86°F86°F1214
November81°F81°F69
December78°F78°F68

Both charts use the same temperature scale.

Where the numbers come from

  • Key West, FL: temperature from Key West Intl Airport (USW00012836), 1.9 mi E of the city center; precipitation from Key West Intl Airport (USW00012836). NOAA 1991-2020 normals and daily records.
  • Miami, FL: temperature from Miami Intl Airport (USW00012839), 7.7 mi W of the city center; precipitation from Miami Intl Airport (USW00012839). NOAA 1991-2020 normals and daily records.

Every station for each city, including humidity and frost, is listed on the city page. Methodology.