Miami, FL weather in September
Expect hot, oppressively humid weather with rain on most days in Miami in September, with highs near 89°F and lows near 77°F. Rain falls on about 18 days. Pack rain gear.
- Normal high
- 89°F
- Normal low
- 77°F
- Wet days
- 18
- 10.2 in total
- Muggy days
- 30
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 90°F | 88°F |
| Normal low | 77°F | 76°F |
| Chance of a wet day | 61% | 56% |
| Sunrise / sunset | 7:01 am / 7:40 pm | 7:12 am / 7:08 pm |
| Daylight | 12.7 h | 11.9 h |
Chance of a wet day: average for the first and last 7 days of the month. Times are local clock time (Eastern Time).
A typical September day
- 6 am79°Fdew point 74°F
- 9 am84°Fdew point 75°F
- Noon87°Fdew point 74°F
- 3 pm86°Fdew point 74°F
- 6 pm83°Fdew point 74°F
- 9 pm81°Fdew point 74°F
NOAA hourly normals (local standard time) from Miami Intl Airport (8 mi away); average wind 7 mph; clear or few clouds in 37% of daytime hours, mostly cloudy or overcast in 40%.
What kind of days to expect
- Comfortable dayshigh 65-80°F and dew point under 60°F0 of 30
- Beach dayshigh 80-95°F, under 0.05 in of rain, afternoon wind under 15 mph14 of 30
- Hot dayshigh 90°F or more15 of 30
- Muggy daysdaily mean dew point 65°F or more30 of 30
- Wet daysat least 0.01 in of rain or melted snow18 of 30
- Notable rainat least 0.10 in13 of 30
- Freezing nightslow 32°F or below0 of 30
Average days per September, counted from daily records for each year 1991-2020.
Rain in September
Normal precipitation is 10.2 in; a dry September brings about 7.2 in and a wet one about 12.6 in (25th and 75th percentiles). About 6 days bring half an inch or more, and about 3 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202019: average high 91°F
- Coolest September2001: average high 87°F
- Wettest September2001: 18.0 in
- Driest September2019: 3.3 in
- Highest reading96°F (September 6, 2019)
- Lowest reading70°F (September 27, 2005)
From the station's daily records with NOAA quality flags removed; most recent date shown when a reading repeats.
September compared with August and October
| August | September | October | |
|---|---|---|---|
| Normal high | 91°F | 89°F | 86°F |
| Normal low | 78°F | 77°F | 74°F |
| Wet days | 19 | 18 | 14 |
| Comfortable days | 0 | 0 | 1 |
| Daylight | 13.0 h | 12.3 h | 11.5 h |
Highs change by -2°F from August and -3°F into October.
Nearby alternatives in September
- Drier: Port St. Lucie, FL105 mi · high 88°F · 15 wet days
How Miami ranks in September
- Normal high72nd warmest of 378 cities; 12th of 23 in Florida
- Wet days371st driest of 378
- Comfortable days329th most of 342
What to pack for Miami in September
- Light, breathable clothing – highs near 89°F and about 30 muggy days
- A rain jacket or umbrella – rain on about 18 days
- A swimsuit – about 14 beach days
Heating and cooling
September has 0 heating degree days and 539 cooling degree days (base 65°F), 11% of the year's total heating and cooling demand.
Questions
How hot is Miami in September?
The normal high is 89°F and the normal low is 77°F. From 1991 to 2020 the hottest September reading was 96°F (most recently on September 6, 2019).
Does it rain a lot in Miami in September?
About 18 days in September have at least 0.01 in of precipitation, and the normal total is 10.2 in. The wettest September in 1991-2020 was in 2001 (18.0 in); the driest was in 2019 (3.3 in).
Is September a good time to visit Miami?
September ranks 11th of 12 months on our comfort score for Miami (32 out of 100). It has almost no comfortable days and about 15 days at 90°F or hotter. The best months are January, February and March.
Where the numbers come from
- Temperature, rain, frost dates and humidity and wind by hour: Miami Intl Airport (USW00012839), 7.7 mi W of the city center, 29 ft . NOAA normals and daily records, 1991-2020.
- Snowfall and snow depth: Hialeah (USC00083909), 6.5 mi WNW of the city center, 12 ft . NOAA normals and daily records, 1991-2020.
- Cloud cover: Miami Kendall Tamiami Exec Airport (USW00012888), 17 mi WSW of the city center, 10 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Miami International Airport (722020-12839), 7.7 mi W of the city center, 5 ft . Hourly observations, 1991-2020.