Miami weather in September: Miami, Florida: normal highs, lows, rain and records for September
Miami in September has a normal high of 89°F and a normal low of 77°F, a daily mean of 83°F, falling from 90°F on the 1st to 88°F by the 30th. Measurable precipitation falls on 18 days in a normal September, 10.22 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 32°C and low of 25°C, 260 mm of precipitation in September.
- NOAA stationMiami International Airport
- Station IDUSW00012839
- Location25.79°N 80.32°W
- Elevation29 ft (9 m)
- From the center7 miles
- Population487,014
- Jan 76° 61°
- Feb 78° 63°
- Mar 81° 66°
- Apr 84° 70°
- May 87° 73°
- Jun 89° 76°
- Jul 91° 78°
- Aug 91° 78°
- Sep 89° 77°
- Oct 86° 74°
- Nov 81° 68°
- Dec 78° 64°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is Miami in September?
The normal high is 89°F and the normal low 77°F, for a daily mean of 83.0°F. September is 1.2°F cooler than August and 2.9°F warmer than October. September is the 3rd warmest month of the year in Miami and the 2nd wettest. Across the month the normal high falls 2°F, from 90°F on September 1 to 88°F on September 30. From one year to the next September's mean temperature typically moves about 0.8°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 82°F and 84°F.
Bars above: each day's normal high to low. Columns below: the chance of 0.01 inch or more of precipitation that day, on a scale of 0 to 100% (highest 61%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 90°F | 77°F | 61% | 44% |
| September 8 | 90°F | 77°F | 61% | 43% |
| September 15 | 89°F | 77°F | 59% | 42% |
| September 22 | 89°F | 77°F | 58% | 41% |
| September 30 | 88°F | 76°F | 55% | 38% |
Every day of September: normal high, low and chance of precipitation (warmest afternoon September 1, coldest night September 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| September 1 | 90°F | 77°F | 61% | 44% | 12 h 40 min |
| September 2 | 90°F | 77°F | 61% | 44% | 12 h 40 min |
| September 3 | 90°F | 77°F | 61% | 44% | 12 h 40 min |
| September 4 | 90°F | 77°F | 61% | 44% | 12 h 40 min |
| September 5 | 90°F | 77°F | 61% | 44% | 12 h 40 min |
| September 6 | 90°F | 77°F | 61% | 44% | 12 h 30 min |
| September 7 | 90°F | 77°F | 61% | 44% | 12 h 30 min |
| September 8 | 90°F | 77°F | 61% | 43% | 12 h 30 min |
| September 9 | 89°F | 77°F | 60% | 43% | 12 h 30 min |
| September 10 | 89°F | 77°F | 60% | 43% | 12 h 30 min |
| September 11 | 89°F | 77°F | 60% | 43% | 12 h 30 min |
| September 12 | 89°F | 77°F | 60% | 43% | 12 h 20 min |
| September 13 | 89°F | 77°F | 60% | 43% | 12 h 20 min |
| September 14 | 89°F | 77°F | 59% | 43% | 12 h 20 min |
| September 15 | 89°F | 77°F | 59% | 42% | 12 h 20 min |
| September 16 | 89°F | 77°F | 59% | 42% | 12 h 20 min |
| September 17 | 89°F | 77°F | 59% | 42% | 12 h 20 min |
| September 18 | 89°F | 77°F | 59% | 42% | 12 h 20 min |
| September 19 | 89°F | 77°F | 58% | 42% | 12 h 10 min |
| September 20 | 89°F | 77°F | 58% | 41% | 12 h 10 min |
| September 21 | 89°F | 77°F | 58% | 41% | 12 h 10 min |
| September 22 | 89°F | 77°F | 58% | 41% | 12 h 10 min |
| September 23 | 89°F | 77°F | 57% | 41% | 12 h 10 min |
| September 24 | 89°F | 77°F | 57% | 40% | 12 h 10 min |
| September 25 | 88°F | 77°F | 57% | 40% | 12 h 10 min |
| September 26 | 88°F | 77°F | 56% | 40% | 12 h |
| September 27 | 88°F | 77°F | 56% | 39% | 12 h |
| September 28 | 88°F | 77°F | 56% | 39% | 12 h |
| September 29 | 88°F | 77°F | 55% | 38% | 12 h |
| September 30 | 88°F | 76°F | 55% | 38% | 12 h |
- Normal high
- 89°FSeptember average
- Normal low
- 77°FSeptember average
- Precipitation
- 10.22 inmonth total
- Days with precipitation
- 180.01 inch or more
- Days at 90°F or more
- 15
- Daylight
- 12 h 40 min to 12 hSeptember 1 to September 30
- Days at 70°F or more
- 30
- Days at 80°F or more
- 30
- Sunshine
- 77%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012839; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in Miami in September?
On a given September day the chance of 0.01 inch or more is 59% on average, highest around September 1 (61%). In all, 10.22 in falls on 18 days of a normal September, 3 of them with an inch or more.
In a normal September in Miami, 15 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012839.
How humid and windy is Miami in September?
At 3 p.m. the normal temperature is 85°F with 67% relative humidity and a dew point of 73°F; at 6 a.m. it is 78°F with 86% humidity. The wind averages 7.6 mph, most often from the east in the afternoon. A dew point of 65°F or more feels muggy to most people.
| Time | Temperature | Dew point | Humidity | Wind | Clear or few clouds |
|---|---|---|---|---|---|
| 6 a.m. | 78°F | 74°F | 86% | 4.7 mph | 20% |
| 9 a.m. | 83°F | 74°F | 74% | 8.6 mph | – |
| noon | 86°F | 73°F | 66% | 10.4 mph | – |
| 3 p.m. | 85°F | 73°F | 67% | 10.6 mph | – |
| 6 p.m. | 82°F | 73°F | 73% | 9.1 mph | 10% |
| 9 p.m. | 81°F | 73°F | 78% | 7.0 mph | 23% |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00012839. Hourly normals exist only for NOAA's first-order stations; a dash where NOAA publishes no value for that hour (the sky at some hours).
What are the records for September in Miami?
The warmest September temperature on Miami's official record (since 1895) is 97°F, on September 8, 1987; the coldest is 62°F, on September 29, 1903. The wettest September brought 24.40 in (1960).
The September mean against the 1991-2020 normal of 83.0°F: 2021 83.1°F (+0.1), 2022 84.3°F (+1.3), 2023 84.7°F (+1.7), 2024 84.7°F (+1.7), 2025 83.2°F (+0.2), 2026 83.1°F (+0.1). 6 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 83.1°F | +0.1°F | 12.12 in |
| 2022 | 84.3°F | +1.3°F | 12.15 in |
| 2023 | 84.7°F | +1.7°F | 12.76 in |
| 2024 | 84.7°F | +1.7°F | 9.11 in |
| 2025 | 83.2°F | +0.2°F | 16.55 in |
| 2026 | 83.1°F | +0.1°F | 7.31 in |
Source: records: ACIS, NWS threaded record MIAthr; recent months: ACIS, station USW00012839. Records and recent months use complete months only.
How does September in Miami compare across Florida?
Across the 106 places PlainClimate covers in Florida, September normal highs run from 86°F in Jacksonville Beach to 92°F in Plant City; Miami's is 89°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.