Sirinhaém weather in September

In September, Sirinhaém sees average daytime highs of 26°C and overnight lows near 23°C, with 58 mm of rain across 17.9 wet days and about 11.9 hours of daylight. It is the 10th-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 56% 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 Sirinhaém's 1st-clearest and 2nd-windiest month. For the whole year in context, see Sirinhaém's year-round climate.

Daytime high
26°
10th warmest
Overnight low
23°
3rd coldest
Rainfall
58 mm
17.9 wet days
Daylight
12 hours
5:16 AM – 5:13 PM
Cloud cover
40%
1st clearest
Wind
17 km/h
2nd windiest
Solar energy
5.38 kWh/m²
Travel score
5.7
out of 10

Sirinhaém 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 26°C through the month.

A typical September day in Sirinhaém reaches about 26°C in the afternoon and slips back to 23°C overnight — a 3°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 27°C. Set against its neighbours, September runs on par with August and on par with October.

20°23°25°28°30°151015202530
Avg high (°C)Avg low (°C)
12623
22623
32623
42623
52623
62623
72623
82623
92623
102623
112623
122623
132623
142623
152623
162623
172623
182623
192623
202623
212623
222623
232723
242723
252723
262723
272723
282723
292723
302723

Sirinhaém weather by month

How September compares with the rest of the year at a glance. September is the 10th-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 25°6018.312.45.0
Feb28° / 25°6616.612.34.8
Mar29° / 25°882012.14.6
Apr28° / 25°12021.811.84.4
May27° / 24°16024.111.64.6
Jun27° / 24°18524.811.54.5
Jul26° / 23°1552511.54.7
Aug26° / 23°9221.611.75.2
Sep26° / 23°5817.911.95.7
Oct27° / 24°4115.412.26.0
Nov28° / 24°3212.812.46.2
Dec28° / 25°3714.112.55.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September, the clearest month of the year.

Beyond those clear spells, partly cloudy skies cover about 33% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to open up as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18515
28614
38614
48614
58614
68515
78515
88515
98614
108614
118614
128713
138812
148812
158812
168812
179010
189010
199010
209010
219010
22919
23919
24919
25928
26928
27928
28928
29928
30919

Chance of precipitation in September

Any precipitation

Sirinhaém gets around 58 mm of rain over 17.9 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 59% and peaks near 68% on the wettest days. The odds ease toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
167
267
368
468
568
668
768
867
967
1067
1166
1266
1365
1464
1562
1661
1760
1858
1957
2055
2154
2252
2351
2450
2549
2648
2747
2847
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 62% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)
126632
226533
326533
426434
526434
626434
726335
826335
926335
1026335
1126236
1226236
1326236
1426236
1526335
1626335
1726335
1816435
1916336
2016336
2116237
2216138
2316138
2416039
2515841
2615742
2715643
2815544
2915445
3015346

Wind in September

Winds average 17 km/h in September.

Across September, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
117light breeze
217light breeze
317light breeze
417light breeze
517light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2616light breeze
2716light breeze
2816light breeze
2916light breeze
3016light breeze

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 5:25 AM to 5:08 AM, and sunset from 5:15 PM to 5:12 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:255:15
211.85:255:15
311.85:245:15
411.95:235:15
511.95:235:15
611.95:225:15
711.95:225:15
811.95:215:14
911.95:205:14
1011.95:205:14
1111.95:195:14
1211.95:195:14
1311.95:185:14
1411.95:175:14
1511.95:175:14
1612.05:165:13
1712.05:165:13
1812.05:155:13
1912.05:145:13
2012.05:145:13
2112.05:135:13
2212.05:135:13
2312.05:125:13
2412.05:115:12
2512.05:115:12
2612.05:105:12
2712.05:105:12
2812.15:095:12
2912.15:085:12
3012.15:085:12

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.38 kWh/m².

For context, solar energy here swings from a low near 4.03 kWh/m² to a high of 5.96 kWh/m² in November across the year — September's 5.38 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.1Bright
25.1Bright
35.1Bright
45.1Bright
55.1Bright
65.2Bright
75.2Bright
85.2Bright
95.2Bright
105.2Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.4Bright
175.4Bright
185.4Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Sirinhaém

In seasonPeak

None of Sirinhaém's seasonal hazards are active in September. The full-year calendar below shows when the rainy season, cyclone risk and dust haze do peak.

Sirinhaém's rainy season runs March–August, 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 Sirinhaém?

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

5.7
Sightseeing
4th-best month of the year
5.6
Beach & pool
7th-best month of the year

September is a reasonable time to visit Sirinhaém for sightseeing.

What to pack for Sirinhaém in September

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

In September, Sirinhaém sees daytime highs around 26°C and nights near 23°C. Pack rain gear. Worth having: light clothes and sun protection. About 18 days see rain.

rain gearlight clothessun protection

Sea temperature near Sirinhaém 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 27 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
Mar29Tropical
Apr29Tropical
May28Tropical
Jun27Warm
Jul26Warm
Aug26Warm
Sep26Warm
Oct27Warm
Nov27Warm
Dec28Warm

UV index in Sirinhaém 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 Sirinhaém peaks around March 14 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 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 14UV 15Jul 14UV 10
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Very high
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec12Extreme
Location & terrain

Where is Sirinhaém?

Sirinhaém sits at 8.6°S, 35.1°W, 43 m above sea level, in Brazil. The nearest listed city is Rio Formoso, 10 km away.

Topography around Sirinhaém

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

Within 3 km, the terrain around Sirinhaém has only modest variations in elevation — a maximum elevation change of 107 m around an average of 28 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 200 m; within 80 km, large variations in elevation — a maximum elevation change of 859 m.

The land around Sirinhaém is covered by trees (32%), grassland (30%) and cropland (30%) within 3 km, trees (32%), grassland (26%) and water (22%) within 16 km, and grassland (42%) and water (32%) within 80 km.

3 km
107 m
16 km
200 m
80 km
859 m
treesgrasslandcroplandartificial surfaceswaterwetlandmangroves
September weather nearby: Rio Formoso 10 km · Tamandaré 18 km · Porto de Galinhas 22 km · Barreiros 26 km · Escada 28 km · Gameleira 30 km · Ribeirão 30 km · São José da Coroa Grande 34 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 Sirinhaém (-8.5908°, -35.1161°, elevation 43 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).