Américo Brasiliense weather in September

In September, Américo Brasiliense sees average daytime highs of 30°C and overnight lows near 18°C, with 68 mm of rain across 7.8 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 30°C through the month. The sky is clear or mostly clear about 55% 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 Américo Brasiliense's 4th-clearest and 1st-windiest month. For the whole year in context, see Américo Brasiliense's year-round climate.

Daytime high
30°
2nd warmest
Overnight low
18°
5th coldest
Rainfall
68 mm
7.8 wet days
Daylight
11 h 54 min
7:10 AM – 7:03 PM
Cloud cover
42%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.61 kWh/m²
Travel score
5.7
out of 10

Américo Brasiliense 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 30°C through the month.

A typical September day in Américo Brasiliense reaches about 30°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 24°C and 34°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12917
22917
32917
43017
53017
63017
73017
83017
93017
103017
113017
123018
133018
143018
153018
163018
173018
183018
193018
203018
212918
222918
232918
242918
252918
262918
272918
282918
292918
302918

Américo Brasiliense weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°25221.813.23.8
Feb30° / 21°17117.612.74.0
Mar29° / 20°14717.112.24.5
Apr29° / 19°618.511.56.1
May26° / 16°555.9117.5
Jun26° / 15°343.410.78.1
Jul26° / 14°243.110.88.2
Aug28° / 16°253.211.37.5
Sep30° / 18°687.811.95.7
Oct30° / 19°11612.612.54.7
Nov29° / 20°16416.1134.4
Dec29° / 21°21020.813.34.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 55% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 12% of September, with mostly cloudy or overcast conditions the remaining 34%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27723
37723
47624
57525
67426
77426
87327
97327
107228
117030
127030
136931
146832
156733
166634
176535
186535
196436
206337
216238
226139
236040
245941
255842
265743
275644
285644
295545
305446

Chance of precipitation in September

Any precipitation

Américo Brasiliense gets around 68 mm of rain over 7.8 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 26% and peaks near 35% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
116
217
317
418
519
620
720
821
922
1022
1123
1224
1324
1425
1526
1626
1727
1828
1929
2029
2130
2231
2331
2432
2533
2634
2734
2835
2935
3035

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 42% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
16423121
26224131
36124132
46024142
55924152
65725162
75725162
85426173
95227183
105028193
114829204
124729204
134530214
144331215
154232225
164032225
173833236
183733246
193534247
203434258
213234268
223134269
2330332710
2428332711
2527322812
2626312914
2725312915
2825303016
2924293017
3023283118

Wind in September

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

Across September, daily wind ranges from about 11 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
111calm
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 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 7:25 AM to 6:56 AM, and sunset from 6:59 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:256:59
211.67:246:59
311.67:237:00
411.67:227:00
511.67:217:00
611.77:207:00
711.77:197:01
811.77:187:01
911.77:177:01
1011.77:167:01
1111.87:157:02
1211.87:147:02
1311.87:137:02
1411.87:127:03
1511.97:117:03
1611.97:107:03
1711.97:097:03
1811.97:087:04
1911.97:077:04
2012.07:067:04
2112.07:057:04
2212.07:047:05
2312.07:037:05
2412.07:027:05
2512.17:017:06
2612.17:007:06
2712.16:597:06
2812.16:587:06
2912.26:577:07
3012.26:567:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.61 kWh/m².

For context, solar energy here swings from a low near 3.83 kWh/m² to a high of 5.95 kWh/m² in October across the year — September's 5.61 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.5Bright
95.5Bright
105.5Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.8Bright
Planning a trip in September

Hazard calendar for Américo Brasiliense

In seasonPeak

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

Américo Brasiliense's monsoon runs October–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 Américo Brasiliense?

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

5.7
Sightseeing
6th-best month of the year
7.5
Beach & pool
4th-best month of the year

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

What to pack for Américo Brasiliense in September

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

In September, Américo Brasiliense sees daytime highs around 30°C and nights near 18°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Américo Brasiliense in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 9 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Américo Brasiliense peaks around January 20 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 20UV 15Jun 23UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7Very high
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Américo Brasiliense 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 Américo Brasiliense is worst in September — around 37 µg/m³ PM2.5 (poor), about 3.6× the cleanest month (November, 10 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1037 µg/m³Nov 2310 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar13Moderate
Apr14Moderate
May16Moderate
Jun17Moderate
Jul18Moderate
Aug35Poor
Sep37Poor
Oct18Moderate
Nov10Good
Dec11Good
Location & terrain

Where is Américo Brasiliense?

Américo Brasiliense sits at 21.7°S, 48.1°W, 726 m above sea level, in Brazil. The nearest listed city is Araraquara, 11 km away.

Topography around Américo Brasiliense

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

Within 3 km, the terrain around Américo Brasiliense has only modest variations in elevation — a maximum elevation change of 164 m around an average of 705 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 260 m; within 80 km, large variations in elevation — a maximum elevation change of 655 m.

The land around Américo Brasiliense is covered by cropland (56%) within 3 km, cropland (57%) and trees (21%) within 16 km, and cropland (59%) and trees (27%) within 80 km.

3 km
164 m
16 km
260 m
80 km
655 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Araraquara 11 km · Ibaté 28 km · Matão 30 km · São Carlos 39 km · Pradópolis 41 km · Guariba 43 km · Descalvado 54 km · Taquaritinga 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 Américo Brasiliense (-21.7244°, -48.1017°, elevation 726 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).