Batatais weather in September

In September, Batatais sees average daytime highs of 29°C and overnight lows near 18°C, with 68 mm of rain across 7.3 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 29°C through the month. The sky is clear or mostly clear about 53% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Batatais's 4th-clearest and 1st-windiest month. For the whole year in context, see Batatais's year-round climate.

Daytime high
29°
2nd warmest
Overnight low
18°
5th coldest
Rainfall
68 mm
7.3 wet days
Daylight
11 h 54 min
7:08 AM – 7:01 PM
Cloud cover
42%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
5.71 kWh/m²
Travel score
5.8
out of 10

Batatais is settlement in São Paulo federated state, 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 29°C through the month.

A typical September day in Batatais reaches about 29°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12916
22917
32917
42917
52917
62917
72917
82917
92917
102917
113017
123018
133018
143018
153018
163018
173018
183018
192918
202918
212918
222918
232918
242918
252918
262918
272918
282918
292918
302918

Batatais weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 20°26523.513.13.9
Feb29° / 20°18919.212.74.1
Mar29° / 20°16619.412.14.5
Apr28° / 18°689.511.56.3
May26° / 15°425.7117.6
Jun25° / 14°252.710.88.3
Jul26° / 14°172.410.98.4
Aug28° / 15°172.711.37.7
Sep29° / 18°687.311.95.8
Oct30° / 19°11313.612.54.7
Nov29° / 19°17118134.4
Dec28° / 20°23623.713.23.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 53% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 15% of September, with mostly cloudy or overcast conditions the remaining 33%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27822
37822
47822
57624
67624
77624
87426
97426
107327
117129
127030
137030
146931
156832
166733
176733
186634
196535
206436
216337
226238
236139
246040
255941
265842
275743
285644
295644
305446

Chance of precipitation in September

Any precipitation

Batatais gets around 68 mm of rain over 7.3 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 24% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
114
214
315
415
516
616
717
818
918
1019
1120
1221
1322
1422
1523
1624
1725
1826
1927
2028
2129
2230
2331
2432
2533
2634
2735
2836
2937
3037

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the dry band about 44% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16622120
26323131
36323131
46223141
56024151
65924161
75824171
85625181
95426182
105326192
115127202
124928202
134729213
144630223
154430223
164231234
174131244
183932254
193832265
203632275
213532286
223332296
233232307
243131308
252931319
262830329
2727293310
2826293411
2925283412
3024273513

Wind in September

Winds average 10 km/h in September, the windiest month of the year.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
2110calm
2210calm
2310calm
2410calm
2510calm
2610calm
2710calm
2810calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 36 minutes over September. Sunrise moves from 7:23 AM to 6:55 AM, and sunset from 6:57 PM to 7:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:236:57
211.67:226:58
311.67:216:58
411.67:206:58
511.77:196:58
611.77:186:59
711.77:176:59
811.77:166:59
911.77:156:59
1011.87:147:00
1111.87:137:00
1211.87:127:00
1311.87:117:00
1411.87:107:01
1511.97:097:01
1611.97:087:01
1711.97:077:01
1811.97:067:02
1911.97:057:02
2012.07:047:02
2112.07:037:02
2212.07:027:03
2312.07:017:03
2412.07:007:03
2512.16:597:03
2612.16:587:04
2712.16:577:04
2812.16:567:04
2912.16:567:04
3012.26:557:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.71 kWh/m².

For context, solar energy here swings from a low near 3.96 kWh/m² to a high of 5.99 kWh/m² in October across the year — September's 5.71 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.6Bright
55.6Bright
65.6Bright
75.6Bright
85.6Bright
95.6Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.8Bright
305.8Bright
Planning a trip in September

Hazard calendar for Batatais

In seasonPeak

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

Batatais's monsoon runs November–March, when most of the year's rain falls.

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

Is September a good time to visit Batatais?

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

5.8
Sightseeing
6th-best month of the year
7.6
Beach & pool
3rd-best month of the year

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

What to pack for Batatais in September

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

In September, Batatais sees daytime highs around 29°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 7 days see rain.

light clothessun protection

UV index in Batatais in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Batatais peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 22UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Extreme
May8Very high
Jun7High
Jul7High
Aug9Very high
Sep10Very high
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in Batatais 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 Batatais is worst in September — around 43 µg/m³ PM2.5 (poor), about 5.2× the cleanest month (November, 8 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateModerateGoodSep 1540 µg/m³Nov 229 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb10Good
Mar10Good
Apr11Good
May12Good
Jun11Good
Jul11Good
Aug20Moderate
Sep43Poor
Oct15Moderate
Nov8Good
Dec9Good
Location & terrain

Where is Batatais?

Batatais sits at 20.9°S, 47.6°W, 877 m above sea level, in Brazil. The nearest listed city is Brodowski, 14 km away.

Topography around Batatais

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

Within 3 km, the terrain around Batatais has only modest variations in elevation — a maximum elevation change of 147 m around an average of 862 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 408 m; within 80 km, large variations in elevation — a maximum elevation change of 825 m.

The land around Batatais is covered by artificial surfaces (40%), cropland (26%) and trees (21%) within 3 km, cropland (63%) and trees (24%) within 16 km, and cropland (53%) and trees (31%) within 80 km.

3 km
147 m
16 km
408 m
80 km
825 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Brodowski 14 km · Jardinópolis 23 km · Altinópolis 27 km · Serrana 36 km · Orlândia 37 km · Ribeirão Preto 40 km · Franca 44 km · São Joaquim da Barra 44 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 Batatais (-20.8911°, -47.585°, elevation 877 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).