Botucatu weather in September

In September, Botucatu sees average daytime highs of 26°C and overnight lows near 15°C, with 86 mm of rain across 8.9 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-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 44% of the time in September, and the air most often feels comfortable.

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 Botucatu's 4th-clearest and 1st-windiest month. For the whole year in context, see Botucatu's year-round climate.

Daytime high
26°
8th warmest
Overnight low
15°
5th coldest
Rainfall
86 mm
8.9 wet days
Daylight
11 h 54 min
7:12 AM – 7:04 PM
Cloud cover
50%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.23 kWh/m²
Travel score
6.9
out of 10

Botucatu 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 Botucatu reaches about 26°C in the afternoon and slips back to 15°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 32°C. Set against its neighbours, September runs about 2°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12614
22614
32614
42614
52614
62614
72614
82615
92615
102615
112615
122615
132615
142615
152615
162615
172615
182615
192615
202615
212615
222615
232615
242615
252615
262615
272615
282615
292615
302616

Botucatu 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
Jan28° / 19°3152413.24.0
Feb28° / 19°23220.712.84.1
Mar28° / 19°17319.312.24.9
Apr27° / 17°749.211.56.7
May24° / 14°677.210.97.4
Jun23° / 13°535.410.67.7
Jul23° / 12°464.710.78.0
Aug25° / 13°434.511.28.1
Sep26° / 15°868.911.96.9
Oct27° / 16°14213.612.55.8
Nov27° / 17°17816.613.15.3
Dec28° / 19°23621.313.44.5

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 44% 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 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17030
26931
36832
46733
56634
66535
76436
86238
96238
106139
116040
126040
135941
145842
155743
165743
175644
185545
195545
205446
215347
225248
235149
245050
254951
264753
274654
284654
294555
304456

Chance of precipitation in September

Any precipitation

Botucatu gets around 86 mm of rain over 8.9 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 29% and peaks near 38% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
121
221
322
423
524
624
725
825
926
1026
1127
1227
1328
1428
1528
1629
1729
1830
1930
2031
2132
2233
2334
2435
2535
2636
2737
2837
2938
3038

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 38% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15434111
25334121
35234131
45134141
55134141
64935151
74835161
84735171
94636171
104437181
114338181
124138192
134039192
143940202
153740202
163641212
173541212
183441223
193341233
203241233
213141244
223041245
232940256
242840267
252739278
262638278
272538289
2824372910
2923363011
3022363012

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 10 km/h on the calmest days to 11 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

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 7:27 AM to 6:57 AM, and sunset from 7:00 PM to 7:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:277:00
211.67:267:00
311.67:257:00
411.67:247:00
511.67:237:01
611.67:227:01
711.77:217:01
811.77:207:02
911.77:197:02
1011.77:187:02
1111.87:177:03
1211.87:167:03
1311.87:157:03
1411.87:147:04
1511.87:137:04
1611.97:127:04
1711.97:117:04
1811.97:107:05
1911.97:097:05
2012.07:087:05
2112.07:077:06
2212.07:067:06
2312.07:057:06
2412.17:047:07
2512.17:037:07
2612.17:027:07
2712.17:017:08
2812.17:007:08
2912.26:587:08
3012.26:577:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.23 kWh/m².

For context, solar energy here swings from a low near 3.48 kWh/m² to a high of 5.92 kWh/m² in November across the year — September's 5.23 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
115.2Bright
125.2Bright
135.2Bright
145.2Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Botucatu

In seasonPeak

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

Botucatu's rainy season runs October–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 Botucatu?

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

6.9
Sightseeing
5th-best month of the year
6.8
Beach & pool
2nd-best month of the year

September is a reasonable time to visit Botucatu for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Botucatu in September

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

In September, Botucatu sees daytime highs around 26°C and nights near 15°C. Worth packing: light clothes, rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Botucatu 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 Botucatu peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Botucatu 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 Botucatu is worst in September — around 16 µg/m³ PM2.5 (moderate), about 2.1× the cleanest month (March, 8 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1416 µg/m³Mar 158 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr9Good
May10Good
Jun10Good
Jul11Good
Aug14Moderate
Sep16Moderate
Oct13Moderate
Nov8Good
Dec8Good
Location & terrain

Where is Botucatu?

Botucatu sits at 22.9°S, 48.4°W, 837 m above sea level, in Brazil. The nearest listed city is São Manuel, 21 km away.

Topography around Botucatu

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

Within 3 km, the terrain around Botucatu has significant variations in elevation — a maximum elevation change of 269 m around an average of 819 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 492 m; within 80 km, large variations in elevation — a maximum elevation change of 657 m.

The land around Botucatu is covered by artificial surfaces (55%) and trees (21%) within 3 km, trees (48%), cropland (26%) and grassland (22%) within 16 km, and cropland (39%), trees (37%) and grassland (20%) within 80 km.

3 km
269 m
16 km
492 m
80 km
657 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: São Manuel 21 km · Itatinga 30 km · Igaraçu do Tietê 43 km · Barra Bonita 45 km · Conchas 47 km · Lençóis Paulista 48 km · Macatuba 51 km · Avaré 55 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 Botucatu (-22.8858°, -48.445°, elevation 837 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. 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).