West Palm Beach, FL weather in September
West Palm Beach is hot and oppressively humid in September, with rain on most days: highs average 88°F and nights drop to about 76°F. Expect about 17 wet days. Keep rain gear handy.
- Normal high
- 88°F
- Normal low
- 76°F
- Wet days
- 17
- 8.0 in total
- Muggy days
- 30
- dew point 65°F+
How September changes from start to finish
| September 1 | September 30 | |
|---|---|---|
| Normal high | 89°F | 87°F |
| Normal low | 76°F | 75°F |
| Chance of a wet day | 57% | 51% |
| Sunrise / sunset | 6:59 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 am78°Fdew point 73°F
- 9 am84°Fdew point 74°F
- Noon86°Fdew point 73°F
- 3 pm85°Fdew point 73°F
- 6 pm82°Fdew point 73°F
- 9 pm81°Fdew point 73°F
NOAA hourly normals (local standard time) from West Palm Beach Intl Airport (4 mi away); average wind 8 mph.
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 mph15 of 30
- Hot dayshigh 90°F or more11 of 30
- Muggy daysdaily mean dew point 65°F or more30 of 30
- Wet daysat least 0.01 in of rain or melted snow17 of 30
- Notable rainat least 0.10 in11 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 8.0 in; a dry September brings about 5.8 in and a wet one about 8.3 in (25th and 75th percentiles). About 5 days bring half an inch or more, and about 2 an inch or more.
How September varies from year to year
- Warmest September, 1991-20202010: average high 90°F
- Coolest September2001: average high 87°F
- Wettest September2004: 29.4 in
- Driest September2019: 1.4 in
- Highest reading95°F (September 6, 1991)
- Lowest reading69°F (September 25, 2019)
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 | 90°F | 88°F | 85°F |
| Normal low | 77°F | 76°F | 73°F |
| Wet days | 18 | 17 | 12 |
| Comfortable days | 0 | 0 | 1 |
| Daylight | 13.1 h | 12.3 h | 11.5 h |
Highs change by -2°F from August and -3°F into October.
Nearby alternatives in September
- Drier: Tampa, FL170 mi · high 90°F · 13 wet days
How West Palm Beach ranks in September
- Normal high101st warmest of 378 cities; 18th of 23 in Florida
- Wet days367th driest of 378
- Comfortable days336th most of 342
What to pack for West Palm Beach in September
- Light, breathable clothing – highs near 88°F and about 30 muggy days
- A rain jacket or umbrella – rain on about 17 days
- A swimsuit – about 15 beach days
Heating and cooling
September has 0 heating degree days and 507 cooling degree days (base 65°F), 12% of the year's total heating and cooling demand.
Questions
How hot is West Palm Beach in September?
The normal high is 88°F and the normal low is 76°F. From 1991 to 2020 the hottest September reading was 95°F (September 6, 1991).
Does it rain a lot in West Palm Beach in September?
About 17 days in September have at least 0.01 in of precipitation, and the normal total is 8.0 in. The wettest September in 1991-2020 was in 2004 (29.4 in); the driest was in 2019 (1.4 in).
Is September a good time to visit West Palm Beach?
September ranks 10th of 12 months on our comfort score for West Palm Beach (37 out of 100). It has almost no comfortable days and about 11 days at 90°F or hotter. The best months are January, February and March.
Where the numbers come from
- Temperature, rain and humidity and wind by hour: West Palm Beach Intl Airport (USW00012844), 3.5 mi SW of the city center, 19 ft . NOAA normals and daily records, 1991-2020.
- Frost dates: Palm Beach Gardens (USC00086764), 9.7 mi NW of the city center, 20 ft . NOAA normals and daily records, 1991-2020.
- Daily humidity and wind: Palm Beach International Airport (722030-12844), 3.5 mi SW of the city center, 11 ft . Hourly observations, 1991-2020.
- Not available for this location: snowfall, snow depth and cloud cover (no station close enough or similar enough in elevation).