União dos Palmares weather in September

In September, União dos Palmares sees average daytime highs of 27°C and overnight lows near 20°C, with 59 mm of rain across 18.2 wet days and about 11.9 hours of daylight. It is the 9th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 17% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is União dos Palmares's 3rd-clearest and 5th-windiest month. For the whole year in context, see União dos Palmares's year-round climate.

Daytime high
27°
9th warmest
Overnight low
20°
3rd coldest
Rainfall
59 mm
18.2 wet days
Daylight
12 hours
5:20 AM – 5:17 PM
Cloud cover
56%
3rd clearest
Wind
9 km/h
5th windiest
Solar energy
5.11 kWh/m²
Travel score
5.3
out of 10

União dos Palmares is human settlement in Brazil.

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 27°C through the month.

A typical September day in União dos Palmares reaches about 27°C in the afternoon and slips back to 20°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, September runs about 1°C warmer than August and about 2°C cooler than October.

15°20°25°30°151015202530
Avg high (°C)Avg low (°C)
12619
22619
32620
42620
52620
62620
72620
82620
92620
102620
112620
122720
132720
142720
152720
162720
172720
182720
192720
202720
212720
222720
232720
242720
252720
262720
272720
282820
292820
302820

How September really feels in União dos Palmares

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

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

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

União dos Palmares weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°5315.512.54.3
Feb30° / 22°5614.812.34.2
Mar30° / 22°6617.812.14.1
Apr29° / 22°9019.511.84.2
May28° / 21°10723.111.64.5
Jun26° / 20°12524.111.54.5
Jul26° / 20°12325.211.54.5
Aug26° / 19°8422.211.74.9
Sep27° / 20°5918.211.95.3
Oct28° / 21°4314.112.25.5
Nov30° / 21°3110.512.45.2
Dec30° / 22°3010.612.54.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 17% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 43% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15347
25347
35248
45347
55347
65347
75446
85446
95446
105644
115644
125743
135842
145941
155941
166139
176139
186238
196238
206337
216337
226436
236535
246535
256535
266634
276634
286634
296634
306634

Chance of precipitation in September

Any precipitation

União dos Palmares gets around 59 mm of rain over 18.2 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 61% and peaks near 69% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
169
269
369
469
569
669
769
869
968
1068
1168
1267
1366
1465
1564
1663
1761
1860
1958
2057
2156
2254
2353
2451
2550
2649
2748
2848
2947
3047

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 88% of days. Sticky, muggy-or-worse air turns up on roughly 96% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
16904
26904
36904
46895
56895
66895
76886
86886
96886
106877
116877
126877
135878
145878
155878
165878
174888
184888
194888
204888
213889
223889
233889
243889
252899
2628810
2728810
2828810
2928711
3028711

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 5:29 AM to 5:11 AM, and sunset from 5:19 PM to 5:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:295:19
211.85:295:18
311.85:285:18
411.85:275:18
511.95:275:18
611.95:265:18
711.95:265:18
811.95:255:18
911.95:245:18
1011.95:245:18
1111.95:235:18
1211.95:225:17
1311.95:225:17
1411.95:215:17
1511.95:215:17
1612.05:205:17
1712.05:195:17
1812.05:195:17
1912.05:185:17
2012.05:175:17
2112.05:175:16
2212.05:165:16
2312.05:165:16
2412.05:155:16
2512.05:145:16
2612.05:145:16
2712.05:135:16
2812.15:125:16
2912.15:125:16
3012.15:115:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.11 kWh/m².

For context, solar energy here swings from a low near 3.76 kWh/m² to a high of 6.07 kWh/m² in November across the year — September's 5.11 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
14.7Bright
24.8Bright
34.8Bright
44.8Bright
54.8Bright
64.8Bright
74.8Bright
84.9Bright
94.9Bright
104.9Bright
115.0Bright
125.0Bright
135.0Bright
145.0Bright
155.1Bright
165.1Bright
175.1Bright
185.2Bright
195.2Bright
205.2Bright
215.3Bright
225.3Bright
235.3Bright
245.4Bright
255.4Bright
265.4Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for União dos Palmares

In seasonPeak

In September, União dos Palmares sits inside its rainy season season. The full year is below, with each hazard's peak months called out.

União dos Palmares's rainy season runs February–September, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit União dos Palmares?

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

5.3
Sightseeing
2nd-best month of the year
5.4
Beach & pool
7th-best month of the year

September is a reasonable time to visit União dos Palmares for sightseeing.

What to pack for União dos Palmares in September

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

In September, União dos Palmares sees daytime highs around 27°C and nights near 20°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near União dos Palmares in September

The nearest coast averages about 26°C 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 68 km away) is warmest in April at about 29°C and coldest in August near 26°C.

The water stays above 20°C all year — warm enough for a swim any month.

24°26°28°30°JanFebMarAprMayJunJulAugSepOctNovDecwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan28Warm
Feb28Tropical
Mar28Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec27Warm

UV index in União dos Palmares in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in União dos Palmares peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 12UV 15Jul 17UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is União dos Palmares?

União dos Palmares sits at 9.2°S, 36.0°W, 154 m above sea level, in Brazil. The nearest listed city is São José da Laje, 17 km away.

Topography around União dos Palmares

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of União dos Palmares.

Within 3 km, the terrain around União dos Palmares has only modest variations in elevation — a maximum elevation change of 174 m around an average of 158 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 550 m; within 80 km, large variations in elevation — a maximum elevation change of 1,042 m.

The land around União dos Palmares is covered by grassland (79%) within 3 km, grassland (73%) and trees (25%) within 16 km, and grassland (64%) within 80 km.

3 km
174 m
16 km
550 m
80 km
1,042 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: São José da Laje 17 km · Murici 19 km · Capela 28 km · Cajueiro 29 km · Joaquim Gomes 31 km · Messias 32 km · Viçosa 33 km · Correntes 33 km

Brazil travel facts

Travel advisory
Level 2
Exercise Increased Caution
Power plugs
Type C / N
127 / 220 V · 60 Hz
Prices
≈ 46% of US
price level, 2025
GDP per capita
$10,713
2025
Happiness
6.6 / 10
World Happiness, 2025
Safe drinking water
89%
of population, 2024
Homicide rate
19.3
per 100k, 2023
Road deaths
16
per 100k/yr, 2019
Income group
Upper middle
World Bank
English
Low
EF EPI 482
Religion
Roman Catholic 57%Evangelical 27%none 9%other 4%

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 União dos Palmares (-9.1628°, -36.0319°, elevation 154 m), 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. 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).