West Palm Beach weather in September: West Palm Beach, Florida: normal highs, lows, rain and records for September
West Palm Beach in September has a normal high of 88°F and a normal low of 76°F, a daily mean of 82°F, falling from 89°F on the 1st to 87°F by the 30th. Measurable precipitation falls on 17 days in a normal September, 7.96 inches in all. (NOAA 1991-2020 normals)
In metric: a normal high of 31°C and low of 24°C, 202 mm of precipitation in September.
- NOAA stationDonald J. Trump International Airport
- Station IDUSW00012844
- Location26.68°N 80.10°W
- Elevation19 ft (6 m)
- From the center5 miles
- Population127,744
- Jan 75° 58°
- Feb 77° 60°
- Mar 79° 63°
- Apr 82° 68°
- May 86° 72°
- Jun 88° 75°
- Jul 90° 76°
- Aug 90° 77°
- Sep 88° 76°
- Oct 85° 73°
- Nov 80° 66°
- Dec 77° 62°
Each month: normal high (large) and low, °F. Fill: the month's normal mean, colder blue to hotter red.
How warm is West Palm Beach in September?
The normal high is 88°F and the normal low 76°F, for a daily mean of 81.9°F. September is 1.3°F cooler than August and 3.2°F warmer than October. September is the 3rd warmest month of the year in West Palm Beach and the 3rd wettest. Across the month the normal high falls 2°F, from 89°F on September 1 to 87°F on September 30. From one year to the next September's mean temperature typically moves about 0.9°F either way (NOAA's standard deviation), so roughly two Septembers in three average between 81°F and 83°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 57%).
| Day | High | Low | Chance of 0.01 in | Chance of 0.10 in |
|---|---|---|---|---|
| September 1 | 89°F | 76°F | 57% | 38% |
| September 8 | 89°F | 76°F | 57% | 38% |
| September 15 | 88°F | 76°F | 55% | 36% |
| September 22 | 88°F | 76°F | 53% | 34% |
| September 30 | 87°F | 75°F | 50% | 32% |
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 | 89°F | 76°F | 57% | 38% | 12 h 40 min |
| September 2 | 89°F | 76°F | 57% | 38% | 12 h 40 min |
| September 3 | 89°F | 76°F | 57% | 38% | 12 h 40 min |
| September 4 | 89°F | 76°F | 57% | 38% | 12 h 40 min |
| September 5 | 89°F | 76°F | 57% | 38% | 12 h 40 min |
| September 6 | 89°F | 76°F | 57% | 38% | 12 h 30 min |
| September 7 | 89°F | 76°F | 57% | 38% | 12 h 30 min |
| September 8 | 89°F | 76°F | 57% | 38% | 12 h 30 min |
| September 9 | 89°F | 76°F | 57% | 38% | 12 h 30 min |
| September 10 | 88°F | 76°F | 57% | 37% | 12 h 30 min |
| September 11 | 88°F | 76°F | 56% | 37% | 12 h 30 min |
| September 12 | 88°F | 76°F | 56% | 37% | 12 h 30 min |
| September 13 | 88°F | 76°F | 56% | 37% | 12 h 20 min |
| September 14 | 88°F | 76°F | 55% | 37% | 12 h 20 min |
| September 15 | 88°F | 76°F | 55% | 36% | 12 h 20 min |
| September 16 | 88°F | 76°F | 55% | 36% | 12 h 20 min |
| September 17 | 88°F | 76°F | 54% | 36% | 12 h 20 min |
| September 18 | 88°F | 76°F | 54% | 35% | 12 h 20 min |
| September 19 | 88°F | 76°F | 54% | 35% | 12 h 10 min |
| September 20 | 88°F | 76°F | 53% | 35% | 12 h 10 min |
| September 21 | 88°F | 76°F | 53% | 35% | 12 h 10 min |
| September 22 | 88°F | 76°F | 53% | 34% | 12 h 10 min |
| September 23 | 88°F | 76°F | 52% | 34% | 12 h 10 min |
| September 24 | 87°F | 76°F | 52% | 34% | 12 h 10 min |
| September 25 | 87°F | 76°F | 52% | 33% | 12 h 10 min |
| September 26 | 87°F | 76°F | 51% | 33% | 12 h |
| September 27 | 87°F | 75°F | 51% | 33% | 12 h |
| September 28 | 87°F | 75°F | 51% | 33% | 12 h |
| September 29 | 87°F | 75°F | 50% | 32% | 12 h |
| September 30 | 87°F | 75°F | 50% | 32% | 12 h |
- Normal high
- 88°FSeptember average
- Normal low
- 76°FSeptember average
- Precipitation
- 7.96 inmonth total
- Days with precipitation
- 170.01 inch or more
- Days at 90°F or more
- 11
- 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
- 75%of clear-sky sunlight (NASA)
Source: NOAA NCEI 1991-2020 daily normals, station USW00012844; monthly normals. Daylight is computed from the place's latitude with NOAA's solar equations.
Does it rain in West Palm Beach in September?
On a given September day the chance of 0.01 inch or more is 54% on average, highest around September 1 (57%). In all, 7.96 in falls on 17 days of a normal September, 2 of them with an inch or more.
In a normal September in West Palm Beach, 11 days reach 90°F.
Source: NOAA NCEI 1991-2020 daily and monthly normals, station USW00012844.
How humid and windy is West Palm Beach in September?
At 3 p.m. the normal temperature is 85°F with 67% relative humidity and a dew point of 72°F; at 6 a.m. it is 77°F with 85% humidity. The wind averages 8.8 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. | 77°F | 72°F | 85% | 5.9 mph | 18% |
| 9 a.m. | 82°F | 73°F | 74% | 9.3 mph | – |
| noon | 86°F | 73°F | 65% | 11.6 mph | – |
| 3 p.m. | 85°F | 72°F | 67% | 12.1 mph | – |
| 6 p.m. | 81°F | 72°F | 74% | 9.7 mph | – |
| 9 p.m. | 80°F | 73°F | 78% | 8.0 mph | – |
Source: NOAA NCEI 1991-2020 hourly normals, station USW00012844. 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 West Palm Beach?
The warmest September temperature on West Palm Beach's official record (since 1888) is 97°F, on September 12, 1911; the coldest is 61°F, on September 22, 1897. The wettest September brought 29.40 in (2004).
The September mean against the 1991-2020 normal of 81.9°F: 2021 82.4°F (+0.5), 2022 82.7°F (+0.8), 2023 82.8°F (+0.9), 2024 84.4°F (+2.5), 2025 82.7°F (+0.8), 2026 81.8°F (−0.1). 5 of 6 ran warmer than normal.
| September | Mean | Against normal | Precip. |
|---|---|---|---|
| 2021 | 82.4°F | +0.5°F | 6.64 in |
| 2022 | 82.7°F | +0.8°F | 11.86 in |
| 2023 | 82.8°F | +0.9°F | 13.14 in |
| 2024 | 84.4°F | +2.5°F | 11.20 in |
| 2025 | 82.7°F | +0.8°F | 7.96 in |
| 2026 | 81.8°F | −0.1°F | 12.01 in |
Source: records: ACIS, NWS threaded record PBIthr; recent months: ACIS, station USW00012844. Records and recent months use complete months only.
How does September in West Palm Beach 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; West Palm Beach's is 88°F.
Source: NOAA NCEI 1991-2020 monthly normals for every station in the state.
Other months and places
- West Palm Beach in August90°F by day, 77°F at night
- West Palm Beach in October85°F by day, 73°F at night
- West Palm Beach through the yearEvery month, frost dates, records and recent years
- Florida in SeptemberThe statewide normal and the warmest and coolest places
- Plant City: Florida's warmest Septembernormal high 92°F