Registro weather in September

In September, Registro sees average daytime highs of 25°C and overnight lows near 17°C, with 91 mm of rain across 11.6 wet days and about 11.8 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 25°C through the month. The sky is clear or mostly clear about 20% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Registro's 8th-clearest and 3rd-windiest month. For the whole year in context, see Registro's year-round climate.

Daytime high
25°
8th warmest
Overnight low
17°
4th coldest
Rainfall
91 mm
11.6 wet days
Daylight
11 h 54 min
7:10 AM – 7:01 PM
Cloud cover
73%
8th clearest
Wind
7 km/h
3rd windiest
Solar energy
3.84 kWh/m²
Travel score
6.3
out of 10

Registro 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 25°C through the month.

A typical September day in Registro reaches about 25°C in the afternoon and slips back to 17°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 20°C and 32°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12516
22516
32516
42516
52516
62616
72616
82617
92617
102617
112617
122617
132617
142617
152617
162617
172517
182517
192517
202517
212517
222517
232517
242517
252518
262518
272518
282518
292518
302618

How September really feels in Registro

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.

Registro weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°2202213.33.2
Feb31° / 23°1932012.93.3
Mar30° / 22°1482012.23.9
Apr28° / 20°7812.711.45.5
May25° / 17°7910.610.86.6
Jun24° / 15°647.910.57.2
Jul24° / 15°648.110.67.2
Aug24° / 15°517.711.17.2
Sep25° / 17°9111.611.86.3
Oct27° / 19°9313.912.65.6
Nov28° / 20°10515.213.24.9
Dec30° / 22°14417.313.53.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 69%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14753
24654
34555
44357
54258
64159
73961
83763
93664
103466
113466
123268
133268
143070
152971
162971
172971
182773
192674
202674
212575
222476
232377
242278
252278
262278
272179
282080
291981
301981

Chance of precipitation in September

Any precipitation

Registro gets around 91 mm of rain over 11.6 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 38% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
128
229
329
430
530
631
732
832
933
1033
1134
1234
1335
1436
1537
1638
1739
1840
1941
2042
2143
2244
2344
2445
2546
2646
2746
2847
2947
3047

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 47% of days. Sticky, muggy-or-worse air turns up on roughly 29% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
182251181
272251191
372350200
462350210
562349220
652349230
752348230
852348240
942348240
1042348250
1142248251
1242248261
1332149261
1432049271
1532049281
1631949281
1731948291
1841848301
1941848301
2041747311
2141747311
2241647321
2341646331
2441546341
2541545352
2641444362
2741443372
2841443382
2941342392
3031341403

Wind in September

Winds average 7 km/h in September.

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

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
157calm
167calm
177calm
187calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 min at the start of September to 12 h 12 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 42 minutes over September. Sunrise moves from 7:26 AM to 6:55 AM, and sunset from 6:56 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:266:56
211.57:256:56
311.57:246:57
411.67:236:57
511.67:226:58
611.67:216:58
711.67:206:58
811.77:196:59
911.77:186:59
1011.77:176:59
1111.77:157:00
1211.87:147:00
1311.87:137:00
1411.87:127:01
1511.87:117:01
1611.97:107:01
1711.97:097:02
1811.97:087:02
1911.97:077:03
2012.07:057:03
2112.07:047:03
2212.07:037:04
2312.07:027:04
2412.17:017:04
2512.17:007:05
2612.16:597:05
2712.16:587:06
2812.26:577:06
2912.26:567:06
3012.26:557:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.84 kWh/m².

For context, solar energy here swings from a low near 2.77 kWh/m² to a high of 5.42 kWh/m² in December across the year — September's 3.84 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.9Moderate
23.9Moderate
33.9Moderate
43.9Moderate
53.9Moderate
63.9Moderate
73.9Moderate
83.9Moderate
93.9Moderate
103.9Moderate
113.9Moderate
123.9Moderate
133.9Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
253.9Moderate
263.9Moderate
273.9Moderate
283.9Moderate
293.9Moderate
303.9Moderate
Planning a trip in September

Hazard calendar for Registro

In seasonPeak

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

Registro's rainy season runs November–March, 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 Registro?

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

6.3
Sightseeing
5th-best month of the year
5.9
Beach & pool
6th-best month of the year

September is a reasonable time to visit Registro for sightseeing.

What to pack for Registro in September

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

In September, Registro sees daytime highs around 25°C and nights near 17°C. Worth packing: light clothes and rain gear. About 12 days see rain.

light clothesrain gear

Sea temperature near Registro in September

The nearest coast averages about 20°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 48 km away) is warmest in February at about 27°C and coldest in August near 19°C.

It's comfortable for a long swim from Sep 6 to Jul 12 — about 10.2 months when the water holds above 20°C.

20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmtropicalcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan27Warm
Feb27Warm
Mar27Warm
Apr26Warm
May23Refreshing
Jun21Refreshing
Jul20Cool
Aug19Cool
Sep20Refreshing
Oct22Refreshing
Nov23Refreshing
Dec25Warm

UV index in Registro in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Registro peaks around January 19 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 19UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb14Extreme
Mar11Extreme
Apr8Very high
May6High
Jun5High
Jul5High
Aug7Very high
Sep8Very high
Oct10Extreme
Nov13Extreme
Dec13Extreme
Location & terrain

Where is Registro?

Registro sits at 24.5°S, 47.8°W, 17 m above sea level, in Brazil. The nearest listed city is Pariquera-Açu, 26 km away.

Topography around Registro

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

Within 3 km, the terrain around Registro has only modest variations in elevation — a maximum elevation change of 78 m around an average of 18 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 403 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,480 m.

The land around Registro is covered by trees (51%), grassland (23%) and artificial surfaces (20%) within 3 km, trees (78%) within 16 km, and trees (74%) within 80 km.

3 km
78 m
16 km
403 m
80 km
1,480 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: Pariquera-Açu 26 km · Jacupiranga 28 km · Juquiá 28 km · Iguape 38 km · Cajati 40 km · Miracatu 45 km · São Miguel Arcanjo 70 km · Itariri 71 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 Registro (-24.4875°, -47.8436°, elevation 17 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).