Miami weather in September
Miami averages 30°C by day and 25°C at night in September, with the sea at 31°C and about 213 mm of rain in the month.
Day
30°C
Night
25°C
Sea
31°C
Rain
213 mm
Flight from London
9h
What September feels like
September is hot but wet in Miami: rainy season, so pack for showers.
The sea is warm at 31°C: comfortable for long swims.
It is rainy season: about 213 mm of rain falls in the month.
That is 10°C warmer than an average September day in London.
Of the 56 sun destinations we track, Miami is the #20 warmest in September.
Want it warmer in September?
These are hotter than Miami this month for at most an hour and a half more flying:
Miami weather by month
September is highlighted. Compare with August and October, or see the full year in Miami.
| Month | Day | Night | Sea | Rain |
|---|---|---|---|---|
| January | 24°C | 17°C | 22°C | 80 mm |
| February | 25°C | 20°C | 24°C | 63 mm |
| March | 26°C | 20°C | 25°C | 68 mm |
| April | 28°C | 22°C | 26°C | 79 mm |
| May | 29°C | 23°C | 29°C | 157 mm |
| June | 30°C | 25°C | 30°C | 237 mm |
| July | 31°C | 26°C | 32°C | 141 mm |
| August | 31°C | 26°C | 32°C | 164 mm |
| September | 30°C | 25°C | 31°C | 213 mm |
| October | 29°C | 24°C | 28°C | 156 mm |
| November | 27°C | 21°C | 26°C | 99 mm |
| December | 25°C | 19°C | 24°C | 87 mm |
Miami in September: quick answers
Is Miami hot in September?
September is hot but wet in Miami: rainy season, so pack for showers. Average highs are 30°C and lows 25°C.
Can you swim in Miami in September?
The sea is warm at 31°C: comfortable for long swims.
Does it rain in Miami in September?
It is rainy season: about 213 mm of rain falls in the month.
What is the warmest month in Miami?
August, at an average high of 31°C. The coolest is January at 24°C.
How long is the flight to Miami from the UK?
About 9h direct from London, estimated from the 7,105 km distance. Check your airline for exact times.
Still choosing? See where is hot in September for every destination ranked by temperature, sea and flight time.
How we measured this
Averages of every day in September from 2016 to 2025, from the Open-Meteo historical weather archive (ECMWF ERA5 reanalysis). Sea temperature is the 2023 to 2025 average from the Open-Meteo marine archive. Rain is the average monthly total. Reanalysis describes an area about 25 km across, so sheltered resorts can run a degree or two warmer. Flight time is a distance-based estimate from London Heathrow.
Planning Miami in September?
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