São Francisco do Guaporé weather in September

In September, São Francisco do Guaporé sees average daytime highs of 33°C and overnight lows near 22°C, with 72 mm of rain across 13.6 wet days and about 11.9 hours of daylight. It is the 1st-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 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 Francisco do Guaporé's 4th-clearest and 3rd-windiest month. For the whole year in context, see São Francisco do Guaporé's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
5th coldest
Rainfall
72 mm
13.6 wet days
Daylight
11 h 54 min
6:11 AM – 6:07 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 Francisco 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 on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13321
23321
33321
43321
53321
63322
73322
83322
93322
103322
113322
123322
133322
143322
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273322
283322
293322
303322

How September really feels in São Francisco 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 Francisco do Guaporé weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 23°24527.612.62.8
Feb30° / 23°25825.412.42.9
Mar30° / 23°24927.712.12.9
Apr30° / 22°14821.611.73.6
May29° / 21°7414.211.54.8
Jun30° / 20°244.811.35.7
Jul31° / 19°16311.45.5
Aug33° / 20°305.611.64.3
Sep33° / 22°7213.611.93.3
Oct32° / 23°13920.212.32.9
Nov31° / 23°19323.612.62.9
Dec30° / 23°2412712.72.8

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 40%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17525
27525
37426
47327
57228
67129
77129
86931
96832
106733
116634
126535
136337
146139
156040
165842
175743
185644
195545
205446
215347
225149
235050
244951
254951
264753
274753
284555
294555
304456

Chance of precipitation in September

Any precipitation

São Francisco do Guaporé gets around 72 mm of rain over 13.6 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 57% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
132
234
335
436
537
638
739
840
941
1041
1142
1243
1343
1444
1545
1646
1746
1847
1948
2048
2149
2250
2351
2451
2552
2653
2754
2855
2956
3057

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 68% 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 (%)
1451229500
2351129520
3351128530
4351028540
5351028540
635927560
725827580
825826590
925726600
1025725610
1125724620
1224624640
1324623650
1424622660
1524621670
1623619700
1723518720
1823517730
1923516740
2023515750
2123514760
2223514760
2312513790
2412512800
2512412810
2612411811
2712411811
2812410821
2912410821
3012310831

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 6:21 AM to 6:01 AM, and sunset from 6:07 PM to 6:06 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:216:07
211.86:206:07
311.86:206:07
411.86:196:07
511.86:186:07
611.86:186:07
711.86:176:07
811.86:166:07
911.96:166:07
1011.96:156:07
1111.96:146:07
1211.96:136:07
1311.96:136:07
1411.96:126:07
1511.96:116:07
1611.96:116:07
1711.96:106:07
1812.06:096:07
1912.06:086:07
2012.06:086:07
2112.06:076:06
2212.06:066:06
2312.06:066:06
2412.06:056:06
2512.06:046:06
2612.06:036:06
2712.16:036:06
2812.16:026:06
2912.16:016:06
3012.16:016:06

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 — the sunniest month for solar.

For context, solar energy here swings from a low near 4.32 kWh/m² to a high of 5.62 kWh/m² in September 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
85.5Bright
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 Francisco do Guaporé

In seasonPeak

None of São Francisco 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 Francisco 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 Francisco 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 Francisco do Guaporé.

What to pack for São Francisco do Guaporé in September

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

In September, São Francisco do Guaporé sees daytime highs around 33°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 14 days see rain.

light clothesrain gearsun protection

UV index in São Francisco 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 Francisco do Guaporé peaks around January 22 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 22UV 15Sep 14UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul8Very high
Aug7Very high
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in São Francisco 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 Francisco do Guaporé is worst in September — around 76 µg/m³ PM2.5 (unhealthy), about 9.4× the cleanest month (June, 8 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodUnhealthyModerateSep 1671 µg/m³Jun 98 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb12Moderate
Mar12Moderate
Apr9Good
May8Good
Jun8Good
Jul10Good
Aug41Poor
Sep76Unhealthy
Oct39Poor
Nov18Moderate
Dec13Moderate
Location & terrain

Where is São Francisco do Guaporé?

São Francisco do Guaporé sits at 12.1°S, 63.6°W, 170 m above sea level, in Brazil. The nearest listed city is São Miguel do Guaporé, 101 km away.

Topography around São Francisco do Guaporé

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

Within 3 km, the terrain around São Francisco do Guaporé has only modest variations in elevation — a maximum elevation change of 42 m around an average of 166 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 86 m; within 80 km, significant variations in elevation — a maximum elevation change of 513 m.

The land around São Francisco do Guaporé is covered by grassland (76%) within 3 km, grassland (68%) and trees (29%) within 16 km, and trees (66%) and grassland (28%) within 80 km.

3 km
42 m
16 km
86 m
80 km
513 m
treesgrasslandcroplandartificial surfaceswetland
September weather nearby: São Miguel do Guaporé 101 km · Alta Floresta d'Oeste 176 km · Rolim de Moura do Guaporé 181 km · Rolim de Moura 194 km · Presidente Médici 206 km · Buritis 207 km · Ouro Preto do Oeste 207 km · Jaru 216 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 Francisco do Guaporé (-12.0522°, -63.5675°, elevation 170 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).