São Simão weather in September

In September, São Simão sees average daytime highs of 33°C and overnight lows near 21°C, with 45 mm of rain across 6.1 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 8th-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 59% 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 São Simão's 4th-clearest and 2nd-windiest month. For the whole year in context, see São Simão's year-round climate.

Daytime high
33°
1st warmest
Overnight low
21°
5th coldest
Rainfall
45 mm
6.1 wet days
Daylight
11 h 54 min
7:20 AM – 7:13 PM
Cloud cover
39%
4th clearest
Wind
10 km/h
2nd windiest
Solar energy
5.92 kWh/m²
Travel score
4.1
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 Simão reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 37°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)
13320
23320
33320
43320
53320
63320
73321
83321
93321
103321
113321
123321
133321
143321
153321
163321
173321
183321
193321
203321
213321
223321
233321
243321
253321
263321
273322
283322
293322
303322

How September really feels in São Simão

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 Simão weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°26723.8133.2
Feb31° / 23°20721.412.63.2
Mar31° / 22°19421.312.13.5
Apr30° / 21°721011.64.9
May29° / 19°284.411.16.5
Jun29° / 18°141.610.97.1
Jul29° / 17°80.9117.0
Aug31° / 19°101.711.45.6
Sep33° / 21°456.111.94.1
Oct33° / 22°11513.912.43.3
Nov31° / 22°18519.612.93.3
Dec31° / 23°24124.113.13.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 11% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18119
28020
38119
48119
58020
68020
78020
87822
97822
107723
117723
127525
137426
147426
157228
167228
177129
186931
196931
206733
216535
226436
236238
246238
256139
265941
275941
285743
295743
305644

Chance of precipitation in September

Any precipitation

São Simão gets around 45 mm of rain over 6.1 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 21% and peaks near 36% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202530
Rain chance (%)
111
211
312
412
512
613
713
814
914
1015
1115
1216
1317
1417
1518
1619
1720
1821
1922
2023
2124
2226
2327
2428
2530
2631
2732
2834
2935
3036

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 34% of days. Sticky, muggy-or-worse air turns up on roughly 22% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
153251570
252251580
351251590
4502516100
5492416100
6482417110
7462417120
8452418130
9442419131
10422419141
11402420151
12392421161
13372421171
14362422171
15342423181
16332423191
17312324201
18302324212
19292324222
20272325232
21262225253
22242224263
23232124284
24222124294
25212024305
26201924316
27191824337
28181823348
29171723358
30161723359

Wind in September

Winds average 10 km/h in September.

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
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
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 7:33 AM to 7:07 AM, and sunset from 7:11 PM to 7:16 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:337:11
211.67:327:11
311.77:327:11
411.77:317:11
511.77:307:11
611.77:297:11
711.77:287:12
811.77:277:12
911.87:267:12
1011.87:257:12
1111.87:247:12
1211.87:237:13
1311.87:227:13
1411.97:227:13
1511.97:217:13
1611.97:207:13
1711.97:197:13
1811.97:187:14
1911.97:177:14
2012.07:167:14
2112.07:157:14
2212.07:147:14
2312.07:137:15
2412.07:127:15
2512.17:117:15
2612.17:107:15
2712.17:107:15
2812.17:097:16
2912.17:087:16
3012.27:077:16

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.92 kWh/m².

For context, solar energy here swings from a low near 4.14 kWh/m² to a high of 6.27 kWh/m² in October across the year — September's 5.92 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
186.0Bright
196.0Bright
206.0Bright
216.0Bright
226.0Intense
236.0Intense
246.0Intense
256.0Intense
266.0Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for São Simão

In seasonPeak

None of São Simão'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 Simão'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 São Simão?

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

4.1
Sightseeing
6th-best month of the year
7.1
Beach & pool
5th-best month of the year

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

What to pack for São Simão in September

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

In September, São Simão sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: sun protection. About 6 days see rain.

light clothessun protection

UV index in São Simão in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 11 (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 Simão peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 at about 7 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 24UV 15Jun 21UV 7
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr11Extreme
May8Very high
Jun7High
Jul7Very high
Aug9Very high
Sep11Extreme
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in São Simão 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 Simão is worst in September — around 34 µg/m³ PM2.5 (moderate), about 6.1× the cleanest month (November, 6 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1632 µg/m³Nov 226 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb8Good
Mar8Good
Apr6Good
May6Good
Jun6Good
Jul7Good
Aug14Moderate
Sep34Moderate
Oct13Moderate
Nov6Good
Dec6Good
Location & terrain

Where is São Simão?

São Simão sits at 19.0°S, 50.5°W, 471 m above sea level, in Brazil. The nearest listed city is Santa Vitória, 48 km away.

Topography around São Simão

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

Within 3 km, the terrain around São Simão has only modest variations in elevation — a maximum elevation change of 106 m around an average of 449 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 208 m; within 80 km, significant variations in elevation — a maximum elevation change of 517 m.

The land around São Simão is covered by grassland (45%) and cropland (20%) within 3 km, cropland (40%) and grassland (35%) within 16 km, and cropland (50%) and grassland (30%) within 80 km.

3 km
106 m
16 km
208 m
80 km
517 m
treesgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Santa Vitória 48 km · Quirinópolis 61 km · Iturama 90 km · Paranaíba 102 km · Ituiutaba 114 km · Bom Jesus de Goiás 121 km · Cassilândia 126 km · Campina Verde 126 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 Simão (-18.9911°, -50.5436°, elevation 471 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).