São Miguel do Guaporé weather in September

In September, São Miguel do Guaporé sees average daytime highs of 33°C and overnight lows near 22°C, with 76 mm of rain across 13.4 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 36% of the time in September, and the air most often feels oppressive.

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 Miguel do Guaporé's 4th-clearest and 3rd-windiest month. For the whole year in context, see São Miguel do Guaporé's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
5th coldest
Rainfall
76 mm
13.4 wet days
Daylight
11 h 54 min
6:07 AM – 6:03 PM
Cloud cover
55%
4th clearest
Wind
6 km/h
3rd windiest
Solar energy
5.62 kWh/m²
Travel score
3.3
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 Miguel do Guaporé reaches about 33°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 36°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13321
23322
33322
43322
53322
63322
73322
83322
93322
103322
113322
123322
133322
143322
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273322
283322
293322
303323

How September really feels in São Miguel do Guaporé

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 Miguel do Guaporé 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
Jan30° / 23°25527.812.62.9
Feb29° / 23°25625.612.42.9
Mar30° / 23°24527.612.12.9
Apr30° / 22°14821.711.73.5
May30° / 21°7114.211.54.7
Jun31° / 20°194.411.35.5
Jul32° / 19°142.811.45.2
Aug33° / 20°285.211.64.2
Sep33° / 22°7613.411.93.3
Oct32° / 23°14421.112.32.9
Nov31° / 23°20224.412.52.9
Dec30° / 23°2392712.72.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 36% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 23% of September, with mostly cloudy or overcast conditions the remaining 41%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37228
47030
57030
66931
76832
86634
96634
106535
116436
126238
136139
145941
155842
165743
175644
185545
195446
205347
215347
225149
235050
245050
254951
264852
274852
284654
294654
304654

Chance of precipitation in September

Any precipitation

São Miguel do Guaporé gets around 76 mm of rain over 13.4 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 45% and peaks near 59% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
129
230
331
432
533
634
735
836
937
1039
1140
1241
1342
1443
1545
1646
1747
1848
1949
2050
2151
2252
2353
2454
2555
2656
2757
2857
2958
3059

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

Most of September feels oppressive — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, September lands in the oppressive band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 88% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1351633430
2351533440
3341533450
4341433470
5341332480
6341332490
7231231520
8231130540
9231129550
10231028570
1123927590
1223926600
1323825620
1423724640
1523723650
1623622670
1723520700
1813519720
1913418740
2013417750
2113417750
2213416760
2313415770
2412315790
2512314800
2612314800
2712314791
2812313801
2912313801
3001313821

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 6 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 6:17 AM to 5:57 AM, and sunset from 6:04 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:176:04
211.86:176:04
311.86:166:04
411.86:156:04
511.86:156:04
611.86:146:04
711.86:136:04
811.86:136:04
911.96:126:04
1011.96:116:03
1111.96:116:03
1211.96:106:03
1311.96:096:03
1411.96:086:03
1511.96:086:03
1611.96:076:03
1711.96:066:03
1812.06:066:03
1912.06:056:03
2012.06:046:03
2112.06:046:03
2212.06:036:03
2312.06:026:03
2412.06:016:03
2512.06:016:03
2612.06:006:03
2712.15:596:03
2812.15:596:03
2912.15:586:03
3012.15:576:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.62 kWh/m².

For context, solar energy here swings from a low near 4.39 kWh/m² to a high of 5.67 kWh/m² in October across the year — September's 5.62 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.5Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for São Miguel do Guaporé

In seasonPeak

None of São Miguel do Guaporé'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 Miguel do Guaporé's rainy season runs October–April, 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 Miguel do Guaporé?

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

3.3
Sightseeing
6th-best month of the year
5.8
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in São Miguel do Guaporé.

What to pack for São Miguel do Guaporé in September

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

In September, São Miguel do Guaporé sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 13 days see rain.

light clothesrain gearsun protection

UV index in São Miguel do Guaporé in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in São Miguel do Guaporé peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 4 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 11 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 24UV 15Sep 14UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul8Very high
Aug8Very high
Sep3Moderate
Oct11Extreme
Nov14Extreme
Dec14Extreme

Air quality in São Miguel do Guaporé 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 Miguel do Guaporé is worst in September — around 70 µg/m³ PM2.5 (unhealthy), about 8.6× the cleanest month (June, 8 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModerateUnhealthyModerateSep 1666 µg/m³Jun 108 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Good
Mar12Moderate
Apr9Good
May8Good
Jun8Good
Jul10Good
Aug39Poor
Sep70Unhealthy
Oct38Poor
Nov19Moderate
Dec13Moderate
Location & terrain

Where is São Miguel do Guaporé?

São Miguel do Guaporé sits at 11.7°S, 62.7°W, 193 m above sea level, in Brazil. The nearest listed city is Alta Floresta d'Oeste, 88 km away.

Topography around São Miguel do Guaporé

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

Within 3 km, the terrain around São Miguel do Guaporé has only modest variations in elevation — a maximum elevation change of 50 m around an average of 192 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 250 m; within 80 km, significant variations in elevation — a maximum elevation change of 506 m.

The land around São Miguel do Guaporé is covered by grassland (57%) within 3 km, grassland (48%) and trees (45%) within 16 km, and trees (60%) and grassland (39%) within 80 km.

3 km
50 m
16 km
250 m
80 km
506 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Alta Floresta d'Oeste 88 km · Rolim de Moura 100 km · São Francisco do Guaporé 101 km · Presidente Médici 105 km · Ouro Preto do Oeste 118 km · Ji Paraná 122 km · Cacoal 141 km · Jaru 142 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 Miguel do Guaporé (-11.6936°, -62.7114°, elevation 193 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).