Miami weather in August: Miami, Florida: normal highs, lows, rain and records for August
Miami in August has a normal high of 91°F and a normal low of 78°F, a daily mean of 84°F, holding near 91°F all month. Measurable precipitation falls on 19 days in a normal August, 9.58 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 33°C and low of 25°C, 243 mm of precipitation in August.
- 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 August?
The normal high is 91°F and the normal low 78°F, for a daily mean of 84.2°F. August is 0.1°F warmer than July and 1.2°F warmer than September. August is the warmest month of the year in Miami and the 3rd wettest. Across the month the normal high falls 1°F, from 91°F on August 1 to 90°F on August 31. From one year to the next August's mean temperature typically moves about 0.7°F either way (NOAA's standard deviation), so roughly two Augusts in three average between 84°F and 85°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 62%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| August 1 | 91°F | 78°F | 59% | 39% |
| August 8 | 91°F | 78°F | 61% | 41% |
| August 15 | 91°F | 78°F | 61% | 42% |
| August 22 | 91°F | 78°F | 62% | 43% |
| August 31 | 90°F | 77°F | 61% | 43% |
Every day of August: normal high, low and chance of precipitation (warmest afternoon August 1, coldest night August 30)
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in | Daylight |
|---|---|---|---|---|---|
| August 1 | 91°F | 78°F | 59% | 39% | 13 h 20 min |
| August 2 | 91°F | 78°F | 60% | 39% | 13 h 20 min |
| August 3 | 91°F | 78°F | 60% | 40% | 13 h 20 min |
| August 4 | 91°F | 78°F | 60% | 40% | 13 h 20 min |
| August 5 | 91°F | 78°F | 60% | 40% | 13 h 20 min |
| August 6 | 91°F | 78°F | 60% | 40% | 13 h 20 min |
| August 7 | 91°F | 78°F | 60% | 40% | 13 h 10 min |
| August 8 | 91°F | 78°F | 61% | 41% | 13 h 10 min |
| August 9 | 91°F | 78°F | 61% | 41% | 13 h 10 min |
| August 10 | 91°F | 78°F | 61% | 41% | 13 h 10 min |
| August 11 | 91°F | 78°F | 61% | 41% | 13 h 10 min |
| August 12 | 91°F | 78°F | 61% | 41% | 13 h 10 min |
| August 13 | 91°F | 78°F | 61% | 41% | 13 h 10 min |
| August 14 | 91°F | 78°F | 61% | 42% | 13 h 10 min |
| August 15 | 91°F | 78°F | 61% | 42% | 13 h |
| August 16 | 91°F | 78°F | 61% | 42% | 13 h |
| August 17 | 91°F | 78°F | 62% | 42% | 13 h |
| August 18 | 91°F | 78°F | 62% | 42% | 13 h |
| August 19 | 91°F | 78°F | 62% | 42% | 13 h |
| August 20 | 91°F | 78°F | 62% | 43% | 13 h |
| August 21 | 91°F | 78°F | 62% | 43% | 13 h |
| August 22 | 91°F | 78°F | 62% | 43% | 12 h 50 min |
| August 23 | 91°F | 78°F | 62% | 43% | 12 h 50 min |
| August 24 | 90°F | 78°F | 62% | 43% | 12 h 50 min |
| August 25 | 90°F | 78°F | 62% | 43% | 12 h 50 min |
| August 26 | 90°F | 78°F | 62% | 43% | 12 h 50 min |
| August 27 | 90°F | 77°F | 62% | 43% | 12 h 50 min |
| August 28 | 90°F | 77°F | 62% | 43% | 12 h 50 min |
| August 29 | 90°F | 77°F | 61% | 43% | 12 h 50 min |
| August 30 | 90°F | 77°F | 61% | 43% | 12 h 40 min |
| August 31 | 90°F | 77°F | 61% | 43% | 12 h 40 min |
- Normal high
- 91°FAugust average
- Normal low
- 78°FAugust average
- Precipitation
- 9.58 inmonth total
- Days with precipitation
- 190.01 inch or more
- Days at 90°F or more
- 25
- Daylight
- 13 h 20 min to 12 h 40 minAugust 1 to August 31
- Days at 70°F or more
- 31
- Days at 80°F or more
- 31
- Sunshine
- 79%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 August?
On a given August day the chance of 0.01 inch or more is 61% on average, highest around August 21 (62%). In all, 9.58 in falls on 19 days of a normal August, 3 of them with an inch or more.
In a normal August in Miami, 25 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012839.
How humid and windy is Miami in August?
At 3 p.m. the normal temperature is 86°F with 67% relative humidity and a dew point of 74°F; at 6 a.m. it is 80°F with 86% humidity. The wind averages 6.9 mph, most often from the east-southeast 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. | 80°F | 75°F | 86% | 4.2 mph | 16% |
| 9 a.m. | 85°F | 75°F | 73% | 7.6 mph | – |
| noon | 87°F | 74°F | 65% | 9.6 mph | – |
| 3 p.m. | 86°F | 74°F | 67% | 10.3 mph | – |
| 6 p.m. | 84°F | 74°F | 72% | 8.6 mph | – |
| 9 p.m. | 82°F | 75°F | 79% | 6.2 mph | 22% |
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 August in Miami?
The warmest August temperature on Miami's official record (since 1895) is 100°F, on August 18, 2026; the coldest is 67°F, on August 14, 1911. The wettest August brought 16.88 in (1943).
The August mean against the 1991-2020 normal of 84.2°F: 2021 84.8°F (+0.6), 2022 85.6°F (+1.4), 2023 86.6°F (+2.4), 2024 85.0°F (+0.8), 2025 85.3°F (+1.1), 2026 85.9°F (+1.7). 6 of 6 ran warmer than normal.
| August | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 84.8°F | +0.6°F | 7.29 in |
| 2022 | 85.6°F | +1.4°F | 5.17 in |
| 2023 | 86.6°F | +2.4°F | 10.25 in |
| 2024 | 85.0°F | +0.8°F | 12.83 in |
| 2025 | 85.3°F | +1.1°F | 5.88 in |
| 2026 | 85.9°F | +1.7°F | 5.99 in |
Source: records: ACIS, NWS threaded record MIAthr; recent months: ACIS, station USW00012839. Records and recent months use complete months only.
How does August in Miami compare across Florida?
Across the 106 places PlainClimate covers in Florida, August normal highs run from 88°F in Palm Coast to 94°F in Plant City; Miami's is 91°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.