São Desidério weather in September

In September, São Desidério sees average daytime highs of 33°C and overnight lows near 20°C, with 8 mm of rain across 1.1 wet days and about 11.9 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 33°C through the month. The sky is clear or mostly clear about 58% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is São Desidério's 3rd-clearest and 2nd-windiest month. For the whole year in context, see São Desidério's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
20°
5th coldest
Rainfall
8 mm
1.1 wet days
Daylight
11 h 54 min
5:56 AM – 5:52 PM
Cloud cover
37%
3rd clearest
Wind
9 km/h
2nd windiest
Solar energy
6.5 kWh/m²
Travel score
4.2
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 33°C through the month.

A typical September day in São Desidério reaches about 33°C in the afternoon and slips back to 20°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 31°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)
13319
23319
33319
43319
53319
63319
73319
83319
93319
103319
113319
123320
133320
143320
153320
163320
173320
183420
193420
203420
213420
223421
233421
243421
253421
263421
273421
283421
293421
303421

How September really feels in São Desidério

Once humidity and wind are folded in, September averages 30 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
30
heat index over the day's high
Days feeling ≤ C
0
wind chill below the day's low

The story in September is heat — humidity pushes the afternoon "feels like" well above the raw temperature.

São Desidério weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 21°13916.512.64.2
Feb30° / 21°12015.712.44.2
Mar30° / 21°14216.512.14.2
Apr30° / 20°6810.211.74.8
May30° / 20°183.211.45.7
Jun30° / 18°20.311.36.4
Jul30° / 17°0011.36.5
Aug31° / 18°10.111.65.6
Sep33° / 20°81.111.94.2
Oct33° / 22°516.512.33.6
Nov31° / 21°15414.212.63.9
Dec30° / 21°14314.712.74.2

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 58% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 23%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38218
48119
58119
68119
78020
88119
98119
108020
118020
128020
138020
147822
157822
167822
177723
187723
197624
207624
217525
227426
237426
247426
257327
267327
277327
287129
297129
307129

Chance of precipitation in September

Any precipitation

São Desidério gets around 8 mm of rain over 1.1 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 4% and peaks near 8% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
11
21
32
42
52
62
72
82
92
102
112
122
133
143
153
163
173
184
194
204
215
225
235
246
256
266
277
287
298
308

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 54% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1672931
2662941
3672841
4672841
5672841
6662851
7662851
8662851
9662851
10642961
11642961
12623062
13613162
14603172
15593272
16563383
17543493
18533494
195135104
204936115
214637125
224438136
234238136
244039146
253840157
263740167
273541178
283441178
293341188
303241189

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 min at the start of September to 12 h 06 min by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 18 minutes over September. Sunrise moves from 6:07 AM to 5:46 AM, and sunset from 5:52 PM to 5:52 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:075:52
211.86:065:52
311.86:055:52
411.86:055:52
511.86:045:52
611.86:035:52
711.86:035:52
811.86:025:52
911.96:015:52
1011.96:015:52
1111.96:005:52
1211.95:595:52
1311.95:585:52
1411.95:585:52
1511.95:575:52
1611.95:565:52
1711.95:565:52
1812.05:555:52
1912.05:545:52
2012.05:535:52
2112.05:535:52
2212.05:525:52
2312.05:515:52
2412.05:505:52
2512.05:505:52
2612.15:495:52
2712.15:485:52
2812.15:485:52
2912.15:475:52
3012.15:465:52

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.5 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.87 kWh/m² to a high of 6.5 kWh/m² in September across the year — September's 6.5 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.3Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.6Intense
196.6Intense
206.6Intense
216.6Intense
226.6Intense
236.6Intense
246.6Intense
256.6Intense
266.6Intense
276.6Intense
286.6Intense
296.6Intense
306.6Intense
Planning a trip in September

Hazard calendar for São Desidério

In seasonPeak

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

São Desidério's rainy season runs November–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 São Desidério?

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

4.2
Sightseeing
6th-best month of the year
7.7
Beach & pool
5th-best month of the year

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

What to pack for São Desidério in September

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

In September, São Desidério sees daytime highs around 33°C and nights near 20°C. Pack light clothes and sun protection.

light clothessun protection

UV index in São Desidério in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Desidério peaks around February 18 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 18UV 15Jun 22UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug10Extreme
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in São Desidério 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 São Desidério is worst in September — around 25 µg/m³ PM2.5 (moderate), about 5.7× the cleanest month (July, 4 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 2324 µg/m³Jul 154 µg/m³
PM2.5 (µg/m³)Level
Jan6Good
Feb7Good
Mar7Good
Apr6Good
May5Good
Jun5Good
Jul4Good
Aug6Good
Sep25Moderate
Oct24Moderate
Nov9Good
Dec9Good
Location & terrain

Where is São Desidério?

São Desidério sits at 12.4°S, 45.0°W, 503 m above sea level, in Brazil. The nearest listed city is Barreiras, 23 km away.

Topography around São Desidério

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

Within 3 km, the terrain around São Desidério has only modest variations in elevation — a maximum elevation change of 203 m around an average of 558 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 284 m; within 80 km, significant variations in elevation — a maximum elevation change of 411 m.

The land around São Desidério is covered by trees (61%) within 3 km, trees (45%) and shrubs (39%) within 16 km, and shrubs (52%) and trees (21%) within 80 km.

3 km
203 m
16 km
284 m
80 km
411 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Barreiras 23 km · Riachão das Neves 69 km · Luis Eduardo Magalhães 93 km · Correntina 115 km · Serra Dourada 120 km · Santana 121 km · Santa Maria da Vitória 142 km · São Félix do Coribe 143 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 São Desidério (-12.3633°, -44.9733°, elevation 503 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).