Igaraçu do Tietê weather in September

In September, Igaraçu do Tietê sees average daytime highs of 28°C and overnight lows near 16°C, with 65 mm of rain across 7.5 wet days and about 11.9 hours of daylight. It is the 7th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 28°C through the month. The sky is clear or mostly clear about 50% of the time in September, and the air most often feels dry.

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

Daytime high
28°
7th warmest
Overnight low
16°
5th coldest
Rainfall
65 mm
7.5 wet days
Daylight
11 h 54 min
7:12 AM – 7:05 PM
Cloud cover
45%
4th clearest
Wind
12 km/h
1st windiest
Solar energy
5.44 kWh/m²
Travel score
6.4
out of 10

Igaraçu do Tietê 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 28°C through the month.

A typical September day in Igaraçu do Tietê reaches about 28°C in the afternoon and slips back to 16°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 34°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)
12816
22816
32816
42816
52816
62816
72816
82816
92816
102816
112816
122816
132816
142816
152816
162816
172816
182817
192817
202817
212817
222817
232817
242817
252817
262817
272817
282817
292817
302817

Igaraçu do Tietê weather by month

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

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°24122.313.23.8
Feb29° / 21°17518.912.83.9
Mar29° / 20°13216.712.24.7
Apr28° / 18°567.411.56.6
May25° / 15°566.210.97.6
Jun25° / 14°404.410.68.1
Jul25° / 14°313.810.88.3
Aug27° / 14°32411.27.9
Sep28° / 16°657.511.96.4
Oct29° / 18°11212.512.55.1
Nov29° / 19°1471513.14.8
Dec29° / 20°18319.813.44.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 50% 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 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27426
37327
47228
57129
67030
76931
86832
96733
106634
116535
126535
136535
146436
156337
166337
176238
186238
196139
206040
215941
225842
235743
245644
255545
265347
275347
285248
295248
305149

Chance of precipitation in September

Any precipitation

Igaraçu do Tietê gets around 65 mm of rain over 7.5 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 25% 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 (%)
117
218
318
419
519
620
720
820
921
1021
1121
1222
1322
1422
1523
1623
1724
1825
1925
2026
2127
2228
2329
2430
2531
2632
2733
2834
2934
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 37% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
15531131
25431141
35331151
45330161
55130172
65130172
75030182
84831192
94731203
104531203
114432213
124233223
134033224
143934234
153735244
163635245
173436255
183336256
193136266
203037277
212936278
222736288
232636299
2425352910
2524353011
2623343112
2722333213
2821333214
2920323315
3019313316

Wind in September

Winds average 12 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 12 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
1312calm
1412calm
1512calm
1612calm
1712calm
1812calm
1912calm
2012calm
2112calm
2212calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3012calm

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 7:28 AM to 6:58 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)
111.57:287:00
211.67:277:01
311.67:267:01
411.67:257:01
511.67:247:01
611.77:237:02
711.77:227:02
811.77:217:02
911.77:207:03
1011.77:197:03
1111.87:187:03
1211.87:177:04
1311.87:167:04
1411.87:147:04
1511.87:137:04
1611.97:127:05
1711.97:117:05
1811.97:107:05
1911.97:097:06
2012.07:087:06
2112.07:077:06
2212.07:067:07
2312.07:057:07
2412.17:047:07
2512.17:037:07
2612.17:027:08
2712.17:017:08
2812.17:007:08
2912.26:597:09
3012.26:587:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.44 kWh/m².

For context, solar energy here swings from a low near 3.64 kWh/m² to a high of 5.98 kWh/m² in November across the year — September's 5.44 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.3Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Igaraçu do Tietê

In seasonPeak

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

Igaraçu do Tietê'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 Igaraçu do Tietê?

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

6.4
Sightseeing
6th-best month of the year
7.5
Beach & pool
2nd-best month of the year

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

What to pack for Igaraçu do Tietê in September

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

In September, Igaraçu do Tietê sees daytime highs around 28°C and nights near 16°C. Pack light clothes. Worth having: sun protection. About 8 days see rain.

light clothessun protection

UV index in Igaraçu do Tietê 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 Igaraçu do Tietê peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 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 22UV 15Jul 11UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar13Extreme
Apr10Very high
May7High
Jun6High
Jul6High
Aug8Very high
Sep9Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Igaraçu do Tietê 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 Igaraçu do Tietê is worst in September — around 22 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (November, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1022 µg/m³Nov 239 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar10Good
Apr11Good
May13Moderate
Jun14Moderate
Jul14Moderate
Aug22Moderate
Sep22Moderate
Oct17Moderate
Nov9Good
Dec9Good
Location & terrain

Where is Igaraçu do Tietê?

Igaraçu do Tietê sits at 22.5°S, 48.6°W, 496 m above sea level, in Brazil. The nearest listed city is Barra Bonita, 2.0 km away.

Topography around Igaraçu do Tietê

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

Within 3 km, the terrain around Igaraçu do Tietê has only modest variations in elevation — a maximum elevation change of 126 m around an average of 480 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 330 m; within 80 km, large variations in elevation — a maximum elevation change of 679 m.

The land around Igaraçu do Tietê is covered by cropland (32%), artificial surfaces (27%) and trees (20%) within 3 km, cropland (65%) within 16 km, and cropland (44%) and trees (38%) within 80 km.

3 km
126 m
16 km
330 m
80 km
679 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Barra Bonita 2.0 km · Macatuba 16 km · Jaú 24 km · Dois Córregos 24 km · São Manuel 25 km · Lençóis Paulista 27 km · Pederneiras 28 km · Botucatu 43 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 Igaraçu do Tietê (-22.5092°, -48.5578°, elevation 496 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).