Royal Palm Beach weather in September

In September, Royal Palm Beach sees average daytime highs of 86°F and overnight lows near 77°F, with 7.4 in of rain across 23.8 wet days and about 12.2 hours of daylight. It is the 4th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 86°F through the month. The sky is clear or mostly clear about 19% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 12 h 36 min at the start of September to 11 h 48 min by month's end. Set against the rest of the year, September is Royal Palm Beach's 12th-clearest and 9th-windiest month. For the whole year in context, see Royal Palm Beach's year-round climate.

Daytime high
86°
4th warmest
Overnight low
77°
10th coldest
Rainfall
7.4 in
23.8 wet days
Daylight
12 h 12 min
6:11 AM – 6:20 PM
Cloud cover
70%
12th clearest
Wind
6 mph
9th windiest
Solar energy
4.82 kWh/m²
Travel score
3.3
out of 10

Royal Palm Beach is village in Palm Beach County, Florida, United States of America.

Density
1,287/km²
people per km²
Founded
1959

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 86°F through the month.

A typical September day in Royal Palm Beach reaches about 86°F in the afternoon and slips back to 77°F overnight — a 10°F spread between the day's warmth and the night's chill. On most days the high lands between 83°F and 89°F. Set against its neighbours, September runs about 2°F cooler than August and about 3°F warmer than October.

70°80°90°151015202530
Avg high (°F)Avg low (°F)
18777
28777
38777
48777
58777
68777
78777
88777
98777
108777
118777
128777
138777
148777
158677
168677
178677
188677
198677
208677
218677
228677
238677
248676
258676
268676
278576
288576
298576
308576

How September really feels in Royal Palm Beach

Once humidity and wind are folded in, September averages 30 days that feel above 90°F and 0 that feel at or below 32°F — the comfort signal a plain temperature reading hides.

Days feeling ≥ 90°F
30
heat index over the day's high
Days feeling ≤ 32°F
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

Royal Palm Beach weather by month

How September compares with the rest of the year at a glance. September is the 4th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°F)Rainfall (inches)Wet daysDaylight (hours)Travel score
Jan73° / 60°1.66.210.57.5
Feb75° / 62°1.75.811.17.7
Mar77° / 64°2.4711.87.4
Apr81° / 69°2.58.212.66.9
May84° / 73°4.312.713.35.3
Jun87° / 76°8.022.813.63.4
Jul88° / 77°7.124.513.53.0
Aug88° / 78°7.725.912.92.8
Sep86° / 77°7.423.812.23.3
Oct83° / 74°4.013.911.45.4
Nov78° / 68°1.67.510.77.2
Dec75° / 63°1.35.810.47.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September, the cloudiest month of the year.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 62%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
13070
23070
33169
43169
53268
63367
73466
83565
93664
103664
113763
123862
133961
144060
154060
164060
174060
184060
194060
204159
214159
224159
234060
244060
254060
264159
274159
284159
294159
304258

Chance of precipitation in September

Any precipitation

Royal Palm Beach gets around 7.4 in of rain over 23.8 wet days in September. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 78% and peaks near 85% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%100%151015202530
Rain chance (%)
185
285
385
485
585
685
784
884
983
1082
1182
1281
1380
1480
1579
1678
1777
1877
1976
2076
2175
2275
2374
2474
2573
2672
2772
2870
2969
3068

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 54% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1014356
2014455
3014554
4014752
5014851
6014950
7015148
8015247
9015346
10025345
11025444
12025543
13025642
14025741
15035641
16035740
17035740
18045640
19045739
20055639
21055738
22065737
23065836
24075835
25075835
26185734
27195733
28195832
291105831
302105830

Wind in September

Winds average 6 mph in September.

Across September, daily wind ranges from about 6 mph on the calmest days to 7 mph at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (mph)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 12 h 36 min at the start of September to 11 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 48 minutes over September. Sunrise moves from 6:04 AM to 6:17 AM, and sunset from 6:37 PM to 6:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.66:046:37
212.56:046:36
312.56:056:35
412.56:056:34
512.46:066:33
612.46:066:32
712.46:076:30
812.46:076:29
912.36:086:28
1012.36:086:27
1112.36:086:26
1212.36:096:25
1312.26:096:23
1412.26:106:22
1512.26:106:21
1612.26:116:20
1712.16:116:19
1812.16:116:18
1912.16:126:16
2012.06:126:15
2112.06:136:14
2212.06:136:13
2312.06:146:12
2411.96:146:10
2511.96:156:09
2611.96:156:08
2711.96:166:07
2811.86:166:06
2911.86:166:05
3011.86:176:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 4.82 kWh/m².

For context, solar energy here swings from a low near 3.08 kWh/m² to a high of 6.23 kWh/m² in May across the year — September's 4.82 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.1Bright
45.1Bright
55.1Bright
65.1Bright
75.0Bright
85.0Bright
95.0Bright
105.0Bright
114.9Bright
124.9Bright
134.9Bright
144.9Bright
154.9Bright
164.8Bright
174.8Bright
184.8Bright
194.8Bright
204.7Bright
214.7Bright
224.7Bright
234.6Bright
244.6Bright
254.6Bright
264.5Bright
274.5Bright
284.5Bright
294.5Bright
304.5Bright
Planning a trip in September

Hazard calendar for Royal Palm Beach

In seasonPeak

In September, Royal Palm Beach sits inside its atlantic hurricane and monsoon season. The full year is below, with each hazard's peak months called out.

Royal Palm Beach sits in the Atlantic hurricane belt; the season peaks August–October.

Royal Palm Beach's monsoon runs May–October, when most of the year's rain falls.

Atlantic hurricane
Monsoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Royal Palm Beach?

Our two travel scores rate September for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

3.3
Sightseeing
10th-best month of the year
4.6
Beach & pool
10th-best month of the year

September is a weaker month for outdoor sightseeing in Royal Palm Beach.

What to pack for Royal Palm Beach in September

From September's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In September, Royal Palm Beach sees daytime highs around 86°F and nights near 77°F. Pack light clothes and rain gear. Worth having: sun protection. About 24 days see rain.

light clothesrain gearsun protection

Sea temperature near Royal Palm Beach in September

The nearest coast averages about 85°F in September — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea at the nearest coast (about 23 mi away) is warmest in August at about 85°F and coldest in February near 77°F.

The water stays above 68°F all year — warm enough for a swim any month.

75°80°85°JanFebMarAprMayJunJulAugSepOctNovDecrefreshingwarmtropicalcomfortable to swim
Sea temperature (°F)Comfort
Jan77Warm
Feb77Warm
Mar77Warm
Apr79Warm
May81Warm
Jun83Tropical
Jul85Tropical
Aug85Tropical
Sep85Tropical
Oct83Tropical
Nov81Warm
Dec79Warm

UV index in Royal Palm Beach in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Royal Palm Beach peaks around July 13 at about 11 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near December 18 at about 5 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — every month of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecHighVery highExtremeVery highHighModerateJul 13UV 11Dec 18UV 5
UV index (midday)Level
Jan5High
Feb7High
Mar9Very high
Apr9Very high
May10Very high
Jun11Extreme
Jul12Extreme
Aug10Extreme
Sep9Very high
Oct8Very high
Nov6High
Dec5Moderate

Air quality in Royal Palm Beach in September

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where September falls, not just the annual average.

Air quality in Royal Palm Beach is worst in July — around 20 µg/m³ PM2.5 (moderate), about 2.5× the cleanest month (December, 8 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodJul 1819 µg/m³Dec 138 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb10Good
Mar11Good
Apr11Good
May11Good
Jun15Moderate
Jul20Moderate
Aug17Moderate
Sep12Good
Oct9Good
Nov8Good
Dec8Good
Location & terrain

Where is Royal Palm Beach?

Royal Palm Beach sits at 26.7°N, 80.2°W, 16 ft above sea level, in United States. The nearest listed city is Wellington, 3.7 mi away.

Topography around Royal Palm Beach

How much the land rises and falls, and what covers it, within 2, 10 and 50 miles of Royal Palm Beach.

Within 2 miles, the terrain around Royal Palm Beach has only modest variations in elevation — a maximum elevation change of 46 ft around an average of 23 ft above sea level; within 10 miles, only modest variations in elevation — a maximum elevation change of 154 ft; within 50 miles, only modest variations in elevation — a maximum elevation change of 200 ft.

The land around Royal Palm Beach is covered by artificial surfaces (36%) and trees (32%) within 2 miles, trees (32%), wetland (21%) and grassland (20%) within 10 miles, and water (38%) and wetland (22%) within 50 miles.

2 miles
46 ft
10 miles
154 ft
50 miles
200 ft
treesgrasslandcroplandartificial surfacesbare terrainwaterwetland
September weather nearby: Wellington 3.7 mi · The Acreage 6.2 mi · Greenacres City 8.7 mi · Palm Springs 9.9 mi · Palm Beach Gardens 9.9 mi · Lake Worth Corridor 9.9 mi · West Palm Beach 11 mi · Riviera Beach 12 mi

United States travel facts

Power plugs
Type A / B
120 V · 60 Hz
Prices
≈ 100% of US
price level, 2025
GDP per capita
$90,027
2025
Happiness
6.8 / 10
World Happiness, 2025
Safe drinking water
98%
of population, 2024
Homicide rate
5.8
per 100k, 2023
Road deaths
12.7
per 100k/yr, 2019
Income group
High
World Bank
Religion
Protestant 47%unaffiliated 23%Roman Catholic 21%Jewish 2%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Royal Palm Beach (26.7084°, -80.2306°, elevation 16 ft), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).