Senador José Porfírio weather in September

In September, Senador José Porfírio sees average daytime highs of 33°C and overnight lows near 25°C, with 41 mm of rain across 8.4 wet days and about 12 hours of daylight. It is the 2nd-warmest and 12th-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 45% of the time in September, and the air most often feels miserable.

Daylight stretches from about 12 hours at the start of September to 12 hours by month's end. Set against the rest of the year, September is Senador José Porfírio's 2nd-clearest and 1st-windiest month. For the whole year in context, see Senador José Porfírio's year-round climate.

Daytime high
33°
2nd warmest
Overnight low
25°
10th coldest
Rainfall
41 mm
8.4 wet days
Daylight
12 hours
6:23 AM – 6:22 PM
Cloud cover
47%
2nd clearest
Wind
8 km/h
1st windiest
Solar energy
6.13 kWh/m²
Travel score
4.0
out of 10

Senador José Porfírio is human 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 33°C through the month.

A typical September day in Senador José Porfírio reaches about 33°C in the afternoon and slips back to 25°C overnight — a 7°C spread between the day's warmth and the night's chill. On most days the high lands between 31°C and 34°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13225
23225
33225
43225
53225
63225
73225
83225
93225
103225
113225
123225
133225
143325
153325
163325
173325
183325
193325
203325
213325
223325
233325
243325
253325
263325
273325
283325
293325
303325

How September really feels in Senador José Porfírio

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
30 feel dangerously hot (≥ 39°C)
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.

Senador José Porfírio weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 12th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°28328.312.12.8
Feb30° / 24°30526.212.12.8
Mar30° / 24°37029.6122.7
Apr30° / 24°35128.911.92.7
May30° / 24°25628.211.92.8
Jun31° / 24°12722.411.93.3
Jul31° / 24°7816.811.93.9
Aug32° / 25°4710.911.94.1
Sep33° / 25°418.4124.0
Oct33° / 25°6210.912.13.6
Nov32° / 25°9214.112.13.3
Dec31° / 25°16721.112.13.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 45% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 30% of September, with mostly cloudy or overcast conditions the remaining 25%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17723
27723
37723
47723
57624
67624
77624
87624
97624
107624
117624
127624
137624
147624
157624
167624
177624
187624
197624
207624
217426
227426
237426
247426
257327
267327
277228
287129
297129
307030

Chance of precipitation in September

Any precipitation

Senador José Porfírio gets around 41 mm of rain over 8.4 wet days in September, the driest month. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 29% and peaks near 34% on the wettest days. The odds ease toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
133
234
334
434
534
634
734
833
933
1032
1132
1231
1331
1430
1529
1628
1727
1826
1926
2025
2124
2224
2324
2423
2524
2624
2724
2824
2925
3025

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 58% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Oppressive (%)Miserable (%)
13070
23169
33268
43367
53466
63565
73664
83763
93862
103961
113961
124060
134060
144159
154159
164258
174258
184357
194456
204555
214654
224753
234852
244951
255050
265149
275149
285248
295248
305248

Wind in September

Winds average 8 km/h in September, the windiest month of the year.

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

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

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

Days grow by about 0 minutes over September. Sunrise moves from 6:29 AM to 6:17 AM, and sunset from 6:26 PM to 6:18 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
112.06:296:26
212.06:296:26
312.06:286:25
412.06:286:25
512.06:276:25
612.06:276:25
712.06:276:24
812.06:266:24
912.06:266:24
1012.06:256:24
1112.06:256:23
1212.06:246:23
1312.06:246:23
1412.06:236:22
1512.06:236:22
1612.06:236:22
1712.06:226:21
1812.06:226:21
1912.06:216:21
2012.06:216:21
2112.06:206:20
2212.06:206:20
2312.06:196:20
2412.06:196:19
2512.06:196:19
2612.06:186:19
2712.06:186:19
2812.06:176:18
2912.06:176:18
3012.06:176:18

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.13 kWh/m².

For context, solar energy here swings from a low near 3.78 kWh/m² to a high of 6.27 kWh/m² in October across the year — September's 6.13 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
45.9Bright
56.0Bright
66.0Bright
76.0Bright
86.0Intense
96.0Intense
106.0Intense
116.0Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.3Intense
246.3Intense
256.3Intense
266.3Intense
276.3Intense
286.3Intense
296.3Intense
306.3Intense
Planning a trip in September

Hazard calendar for Senador José Porfírio

In seasonPeak

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

Senador José Porfírio's monsoon runs December–May, 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 Senador José Porfírio?

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

4.0
Sightseeing
2nd-best month of the year
6.6
Beach & pool
1st-best month of the year

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

What to pack for Senador José Porfírio in September

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

In September, Senador José Porfírio sees daytime highs around 33°C and nights near 25°C. Pack light clothes and sun protection. Worth having: rain gear. About 8 days see rain.

light clothessun protectionrain gear

UV index in Senador José Porfírio 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 Senador José Porfírio peaks around March 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeExtremeMar 15UV 15Jun 23UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Senador José Porfírio 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 Senador José Porfírio is worst in November — around 29 µg/m³ PM2.5 (moderate), about 3.3× the cleanest month (June, 9 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateNov 1228 µg/m³Jun 229 µg/m³
PM2.5 (µg/m³)Level
Jan15Moderate
Feb17Moderate
Mar16Moderate
Apr14Moderate
May10Good
Jun9Good
Jul9Good
Aug11Good
Sep14Moderate
Oct25Moderate
Nov29Moderate
Dec17Moderate
Location & terrain

Where is Senador José Porfírio?

Senador José Porfírio sits at 2.6°S, 52.0°W, 7 m above sea level, in Brazil. The nearest listed city is Vitória do Xingu, 33 km away.

Topography around Senador José Porfírio

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

Within 3 km, the terrain around Senador José Porfírio has only modest variations in elevation — a maximum elevation change of 60 m around an average of 13 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 108 m; within 80 km, only modest variations in elevation — a maximum elevation change of 242 m.

The land around Senador José Porfírio is covered by water (48%) and grassland (33%) within 3 km, trees (46%), water (31%) and grassland (22%) within 16 km, and trees (77%) within 80 km.

3 km
60 m
16 km
108 m
80 km
242 m
treesgrasslandartificial surfaceswaterwetland
September weather nearby: Vitória do Xingu 33 km · Altamira 74 km · Porto de Moz 99 km · Brasil Novo 103 km · Anapu 129 km · Gurupá 136 km · Almeirim 138 km · Medicilândia 141 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 Senador José Porfírio (-2.5908°, -51.9542°, elevation 7 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).