Campinas weather in September

In September, Campinas sees average daytime highs of 21°C and overnight lows near 16°C, with 133 mm of rain across 12.4 wet days and about 11.8 hours of daylight. It is the 9th-warmest and 3rd-wettest month of the year here.

Day-to-day highs hold fairly steady near 21°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 24 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Campinas's 11th-clearest and 3rd-windiest month. For the whole year in context, see Campinas's year-round climate.

Daytime high
21°
9th warmest
Overnight low
16°
4th coldest
Rainfall
133 mm
12.4 wet days
Daylight
11 h 48 min
7:14 AM – 7:04 PM
Cloud cover
70%
11th clearest
Wind
13 km/h
3rd windiest
Solar energy
3.87 kWh/m²
Travel score
6.0
out of 10

Campinas 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 21°C through the month.

A typical September day in Campinas reaches about 21°C in the afternoon and slips back to 16°C overnight — a 5°C spread between the day's warmth and the night's chill. On most days the high lands between 18°C and 25°C. Set against its neighbours, September runs on par with August and about 2°C cooler than October.

10°15°20°25°151015202530
Avg high (°C)Avg low (°C)
12115
22116
32116
42116
52116
62116
72116
82116
92116
102116
112116
122116
132116
142116
152116
162116
172116
182116
192116
202116
212116
222116
232117
242117
252117
262117
272117
282217
292217
302217

Campinas weather by month

How September compares with the rest of the year at a glance. September is the 9th-warmest and 3rd-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan28° / 23°18018.913.55.0
Feb28° / 23°16017.3134.9
Mar27° / 22°12517.312.25.4
Apr25° / 20°8410.611.46.7
May23° / 17°11010.510.76.7
Jun21° / 15°948.910.36.6
Jul20° / 14°848.910.46.5
Aug21° / 15°868.7116.6
Sep21° / 16°13312.411.86.0
Oct23° / 18°12213.512.75.9
Nov25° / 20°11614.113.46.1
Dec27° / 21°12614.813.75.6

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 13% of September, with mostly cloudy or overcast conditions the remaining 67%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
14456
24258
34258
44060
54060
63862
73862
83664
93565
103466
113367
123367
133268
143268
153268
163268
173268
183268
193169
203169
213169
223070
233070
243070
252971
262971
272971
282872
292872
302773

Chance of precipitation in September

Any precipitation

Campinas gets around 133 mm of rain over 12.4 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 41% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
130
231
332
432
533
634
735
836
937
1038
1139
1239
1340
1441
1542
1642
1743
1843
1944
2044
2145
2246
2346
2447
2547
2647
2747
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 41% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
12626426
22526427
32526427
42526427
52526428
62526428
72525428
82525429
92525429
102425429
1124244210
1224244210
1323244310
1423244311
1523244211
1623244211
1723244212
1823244112
1923244112
2023254112
2122254012
2222254013
2321264013
2421264013
2520264014
2620264014
2720254014
2819254015
2919254016
3019254016

Wind in September

Winds average 13 km/h in September.

Across September, daily wind ranges from about 13 km/h on the calmest days to 13 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202530
Wind speed (km/h)Feels
113light breeze
213light breeze
313light breeze
413light breeze
513light breeze
613light breeze
713light breeze
813light breeze
913light breeze
1013light breeze
1113light breeze
1213light breeze
1313light breeze
1413light breeze
1513light breeze
1613light breeze
1713light breeze
1813light breeze
1913light breeze
2013light breeze
2113light breeze
2213light breeze
2313light breeze
2413light breeze
2513light breeze
2613light breeze
2713light breeze
2813light breeze
2913light breeze
3013light breeze

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 24 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 48 minutes over September. Sunrise moves from 7:31 AM to 6:57 AM, and sunset from 6:57 PM to 7:11 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.47:316:57
211.57:306:57
311.57:296:58
411.57:286:58
511.57:276:59
611.67:266:59
711.67:247:00
811.67:237:00
911.67:227:01
1011.77:217:01
1111.77:207:02
1211.77:187:02
1311.87:177:03
1411.87:167:03
1511.87:157:03
1611.87:147:04
1711.97:127:04
1811.97:117:05
1911.97:107:05
2012.07:097:06
2112.07:087:06
2212.07:067:07
2312.07:057:07
2412.17:047:08
2512.17:037:08
2612.17:027:09
2712.17:007:09
2812.26:597:10
2912.26:587:10
3012.26:577:11

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 3.87 kWh/m².

For context, solar energy here swings from a low near 2.63 kWh/m² to a high of 5.88 kWh/m² in December across the year — September's 3.87 kWh/m² falls in the middle.

01234151015202530
Solar energy (kWh/m²)Level
13.8Moderate
23.8Moderate
33.8Moderate
43.8Moderate
53.8Moderate
63.8Moderate
73.8Moderate
83.8Moderate
93.8Moderate
103.8Moderate
113.8Moderate
123.8Moderate
133.8Moderate
143.9Moderate
153.9Moderate
163.9Moderate
173.9Moderate
183.9Moderate
193.9Moderate
203.9Moderate
213.9Moderate
223.9Moderate
233.9Moderate
243.9Moderate
254.0Moderate
264.0Moderate
274.0Moderate
284.0Moderate
294.0Moderate
304.0Bright
Planning a trip in September

Is September a good time to visit Campinas?

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

6.0
Sightseeing
7th-best month of the year
3.8
Beach & pool
10th-best month of the year

September is a reasonable time to visit Campinas for sightseeing.

What to pack for Campinas in September

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

In September, Campinas sees daytime highs around 21°C and nights near 16°C. Worth packing: rain gear. About 12 days see rain.

rain gear

Sea temperature near Campinas in September

The nearest coast averages about 19°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 23 km away) is warmest in February at about 26°C and coldest in August near 18°C.

It's comfortable for a long swim from Oct 8 to Jun 8 — about 8 months when the water holds above 20°C.

15°20°25°JanFebMarAprMayJunJulAugSepOctNovDeccoolrefreshingwarmcomfortable to swimcomfortable to swim
Sea temperature (°C)Comfort
Jan26Warm
Feb26Warm
Mar25Warm
Apr24Refreshing
May22Refreshing
Jun20Cool
Jul18Cool
Aug18Cool
Sep19Cool
Oct21Refreshing
Nov22Refreshing
Dec24Warm

UV index in Campinas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Campinas peaks around January 18 at about 14 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighModerateHighVery highExtremeJan 18UV 14Jul 11UV 5
UV index (midday)Level
Jan14Extreme
Feb13Extreme
Mar11Extreme
Apr8Very high
May5High
Jun5Moderate
Jul5Moderate
Aug6High
Sep8Very high
Oct9Very high
Nov12Extreme
Dec13Extreme
Location & terrain

Where is Campinas?

Campinas sits at 27.6°S, 48.6°W, 8 m above sea level, in Brazil. The nearest listed city is São José, 3.0 km away.

Topography around Campinas

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

Within 3 km, the terrain around Campinas has only modest variations in elevation — a maximum elevation change of 173 m around an average of 21 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 909 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,813 m.

The land around Campinas is covered by artificial surfaces (60%) and water (24%) within 3 km, trees (37%) and water (35%) within 16 km, and trees (51%) and water (37%) within 80 km.

3 km
173 m
16 km
909 m
80 km
1,813 m
treesgrasslandcroplandartificial surfaceswatermangroves
September weather nearby: São José 3.0 km · Florianopolis 6.0 km · Palhoça 8.0 km · Trindade 8.0 km · Pantanal 9.0 km · Biguaçu 12 km · Ribeirão da Ilha 14 km · Freguesia do Ribeirao da Ilha 14 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 Campinas (-27.5944°, -48.6069°, elevation 8 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).