Barretos weather in September

In September, Barretos sees average daytime highs of 32°C and overnight lows near 19°C, with 55 mm of rain across 6.4 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 32°C through the month. The sky is clear or mostly clear about 57% 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 Barretos's 4th-clearest and 1st-windiest month. For the whole year in context, see Barretos's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
19°
5th coldest
Rainfall
55 mm
6.4 wet days
Daylight
11 h 54 min
7:12 AM – 7:05 PM
Cloud cover
40%
4th clearest
Wind
10 km/h
1st windiest
Solar energy
5.79 kWh/m²
Travel score
4.8
out of 10

Barretos 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 32°C through the month.

A typical September day in Barretos reaches about 32°C in the afternoon and slips back to 19°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 26°C and 36°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13118
23119
33119
43119
53119
63219
73219
83219
93219
103219
113219
123219
133220
143220
153220
163220
173220
183220
193220
203220
213220
223220
233220
243220
253220
263220
273220
283220
293220
303220

How September really feels in Barretos

Once humidity and wind are folded in, September averages 0 days that feel above 32°C and 0 that feel at or below 0°C — the comfort signal a plain temperature reading hides.

Days feeling ≥ 32°C
0
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

September sits comfortably in between — no days that feel dangerously hot or drop to a hard freeze once humidity and wind are folded in.

Barretos 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
Jan30° / 22°25923.113.13.4
Feb30° / 22°18819.312.73.6
Mar30° / 21°17119.512.13.9
Apr30° / 20°638.511.55.4
May28° / 17°355.1117.2
Jun27° / 16°212.610.88.0
Jul28° / 16°131.710.97.9
Aug30° / 17°152.311.36.3
Sep32° / 19°556.411.94.8
Oct32° / 21°10512.412.53.9
Nov31° / 21°16017.8133.7
Dec30° / 22°22622.713.23.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 57% 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 32%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18020
27921
37921
47822
57822
67723
77624
87525
97525
107426
117327
127228
137129
147030
156931
166832
176733
186733
196634
206535
216436
226337
236139
246040
255941
265941
275842
285743
295644
305644

Chance of precipitation in September

Any precipitation

Barretos gets around 55 mm of rain over 6.4 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 21% and peaks near 33% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
112
213
313
414
514
615
715
816
916
1017
1117
1218
1318
1419
1520
1621
1721
1822
1923
2024
2125
2226
2327
2428
2529
2630
2731
2832
2932
3033

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 39% of days. Sticky, muggy-or-worse air turns up on roughly 11% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
160241420
259241520
358241620
456241730
556231830
654231940
753232040
851232150
950242250
1048242260
1146242370
1244252470
1343252480
1441262580
1539272590
16372726100
17362826100
18342827110
19322828120
20312828130
21292829140
22282730150
23272730160
24262631170
25242531190
26242431201
27232431221
28222331231
29212231251
30202131261

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
110calm
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
289calm
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 7:26 AM to 6:59 AM, and sunset from 7:02 PM to 7:09 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:267:02
211.67:257:02
311.67:257:02
411.67:247:02
511.77:237:03
611.77:227:03
711.77:217:03
811.77:207:03
911.77:197:04
1011.87:187:04
1111.87:177:04
1211.87:167:04
1311.87:157:04
1411.87:147:05
1511.97:137:05
1611.97:127:05
1711.97:117:05
1811.97:107:06
1911.97:097:06
2012.07:087:06
2112.07:077:06
2212.07:067:07
2312.07:057:07
2412.07:047:07
2512.17:037:07
2612.17:027:08
2712.17:017:08
2812.17:007:08
2912.17:007:08
3012.26:597:09

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.79 kWh/m².

For context, solar energy here swings from a low near 4 kWh/m² to a high of 6.14 kWh/m² in October across the year — September's 5.79 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
306.0Bright
Planning a trip in September

Hazard calendar for Barretos

In seasonPeak

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

Barretos'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 Barretos?

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

4.8
Sightseeing
6th-best month of the year
7.3
Beach & pool
5th-best month of the year

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

What to pack for Barretos in September

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

In September, Barretos sees daytime highs around 32°C and nights near 19°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in Barretos 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 Barretos peaks around January 23 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 23UV 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 Barretos 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 Barretos is worst in September — around 34 µg/m³ PM2.5 (moderate), about 4.9× the cleanest month (November, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1533 µg/m³Nov 227 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar9Good
Apr9Good
May10Good
Jun10Good
Jul9Good
Aug21Moderate
Sep34Moderate
Oct18Moderate
Nov7Good
Dec8Good
Location & terrain

Where is Barretos?

Barretos sits at 20.6°S, 48.6°W, 538 m above sea level, in Brazil. The nearest listed city is Colina, 18 km away.

Topography around Barretos

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

Within 3 km, the terrain around Barretos has only modest variations in elevation — a maximum elevation change of 92 m around an average of 551 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 191 m; within 80 km, significant variations in elevation — a maximum elevation change of 431 m.

The land around Barretos is covered by artificial surfaces (61%) within 3 km, cropland (69%) and trees (20%) within 16 km, and cropland (72%) within 80 km.

3 km
92 m
16 km
191 m
80 km
431 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Colina 18 km · Guaíra 38 km · Monte Azul Paulista 40 km · Olímpia 41 km · Bebedouro 45 km · Viradouro 45 km · Morro Agudo 56 km · Pitangueiras 62 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 Barretos (-20.5572°, -48.5678°, elevation 538 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).