Porteirinha weather in September

In September, Porteirinha sees average daytime highs of 32°C and overnight lows near 18°C, with 7 mm of rain across 1.4 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 42 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Porteirinha's 3rd-clearest and 2nd-windiest month. For the whole year in context, see Porteirinha's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
18°
4th coldest
Rainfall
7 mm
1.4 wet days
Daylight
11 h 54 min
6:49 AM – 6:44 PM
Cloud cover
36%
3rd clearest
Wind
11 km/h
2nd windiest
Solar energy
6.27 kWh/m²
Travel score
5.3
out of 10

Porteirinha is 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 Porteirinha reaches about 32°C in the afternoon and slips back to 18°C overnight — a 13°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 35°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)
13117
23117
33117
43117
53117
63117
73118
83118
93118
103118
113118
123118
133218
143218
153218
163218
173218
183218
193219
203219
213219
223219
233219
243219
253219
263219
273219
283219
293219
303219

How September really feels in Porteirinha

Once humidity and wind are folded in, September averages 10 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
10
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.

Porteirinha 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
Jan31° / 21°981112.84.5
Feb31° / 21°678.212.54.5
Mar31° / 21°821012.14.6
Apr30° / 20°314.811.75.5
May29° / 18°61.611.36.5
Jun28° / 17°10.211.17.4
Jul28° / 16°00.111.27.7
Aug30° / 16°10.211.56.8
Sep32° / 18°71.411.95.3
Oct32° / 20°435.912.44.3
Nov30° / 21°11812.612.74.3
Dec30° / 21°12613.412.94.5

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 19% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18020
28020
38020
48020
58020
68020
78020
88020
98020
108020
118020
127921
137921
147921
157822
167822
177822
187624
197624
207624
217426
227426
237327
247228
257129
267030
276931
286832
296832
306832

Chance of precipitation in September

Any precipitation

Porteirinha gets around 7 mm of rain over 1.4 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 5% and peaks near 11% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
41
51
61
71
81
92
102
112
122
133
143
153
164
175
185
196
206
217
227
238
248
258
269
279
2810
2910
3011

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 51% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1663040
2653050
3653050
4653050
5653050
6643150
7643150
8633250
9623350
10623350
11613450
12603550
13583660
14563761
15543871
16523981
17504091
184841101
194642111
204442121
214243131
224044142
233944152
243744162
253645172
263445183
273345193
283245203
293145204
303144214

Wind in September

Winds average 11 km/h in September.

Across September, daily wind ranges from about 11 km/h on the calmest days to 12 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
112calm
212calm
312calm
412calm
512calm
612calm
712calm
812calm
912calm
1012calm
1112calm
1212calm
1312calm
1412calm
1512calm
1612calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2311calm
2411calm
2511calm
2611calm
2711calm
2811calm
2911calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 42 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 24 minutes over September. Sunrise moves from 7:01 AM to 6:38 AM, and sunset from 6:43 PM to 6:45 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:016:43
211.77:006:43
311.77:006:43
411.76:596:43
511.76:586:43
611.86:576:43
711.86:566:43
811.86:566:43
911.86:556:43
1011.86:546:43
1111.86:536:43
1211.96:526:44
1311.96:526:44
1411.96:516:44
1511.96:506:44
1611.96:496:44
1711.96:486:44
1811.96:476:44
1912.06:476:44
2012.06:466:44
2112.06:456:44
2212.06:446:44
2312.06:436:44
2412.06:426:45
2512.06:426:45
2612.16:416:45
2712.16:406:45
2812.16:396:45
2912.16:386:45
3012.16:386:45

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.27 kWh/m².

For context, solar energy here swings from a low near 4.42 kWh/m² to a high of 6.37 kWh/m² in October across the year — September's 6.27 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Bright
26.0Intense
36.1Intense
46.1Intense
56.1Intense
66.1Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.3Intense
206.3Intense
216.3Intense
226.3Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for Porteirinha

In seasonPeak

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

Porteirinha'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 Porteirinha?

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

5.3
Sightseeing
6th-best month of the year
8.1
Beach & pool
5th-best month of the year

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

What to pack for Porteirinha in September

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

In September, Porteirinha sees daytime highs around 32°C and nights near 18°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Porteirinha 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 Porteirinha peaks around February 16 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 11 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 16UV 15Jul 11UV 8
UV index (midday)Level
Jan14Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme
Location & terrain

Where is Porteirinha?

Porteirinha sits at 15.7°S, 43.0°W, 570 m above sea level, in Brazil. The nearest listed city is Janaúba, 31 km away.

Topography around Porteirinha

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

Within 3 km, the terrain around Porteirinha has significant variations in elevation — a maximum elevation change of 270 m around an average of 614 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 756 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,324 m.

The land around Porteirinha is covered by grassland (38%) and trees (30%) within 3 km, grassland (48%) and trees (29%) within 16 km, and trees (42%), grassland (27%) and shrubs (22%) within 80 km.

3 km
270 m
16 km
756 m
80 km
1,324 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Janaúba 31 km · Rio Pardo de Minas 54 km · Barreiro do Jaíba 62 km · Monte Azul 67 km · Jaíba 83 km · Taiobeiras 85 km · Salinas 92 km · Espinosa 94 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 Porteirinha (-15.7433°, -43.0283°, elevation 570 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. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).