Piraju weather in September

In September, Piraju sees average daytime highs of 27°C and overnight lows near 16°C, with 92 mm of rain across 8.3 wet days and about 11.9 hours of daylight. It is the 8th-warmest and 7th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 45% of the time in September, and the air most often feels comfortable.

Daylight stretches from about 11 h 30 min at the start of September to 12 h 12 min by month's end. Set against the rest of the year, September is Piraju's 4th-clearest and 1st-windiest month. For the whole year in context, see Piraju's year-round climate.

Daytime high
27°
8th warmest
Overnight low
16°
5th coldest
Rainfall
92 mm
8.3 wet days
Daylight
11 h 54 min
7:16 AM – 7:08 PM
Cloud cover
50%
4th clearest
Wind
11 km/h
1st windiest
Solar energy
5.14 kWh/m²
Travel score
6.9
out of 10

Piraju 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 27°C through the month.

A typical September day in Piraju reaches about 27°C in the afternoon and slips back to 16°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 21°C and 33°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C cooler than October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
12715
22715
32715
42715
52715
62715
72715
82715
92716
102716
112716
122716
132716
142716
152716
162716
172716
182716
192716
202716
212716
222716
232716
242716
252716
262716
272716
282716
292716
302716

Piraju weather by month

How September compares with the rest of the year at a glance. September is the 8th-warmest and 7th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°23621.513.34.0
Feb29° / 21°17818.512.84.1
Mar29° / 20°12615.912.24.9
Apr27° / 18°667.911.56.8
May24° / 16°747.110.97.4
Jun23° / 14°59610.67.7
Jul24° / 13°494.710.78.1
Aug25° / 14°484.711.28.0
Sep27° / 16°928.311.96.9
Oct28° / 17°12112.112.55.8
Nov28° / 18°13613.813.15.2
Dec29° / 20°17018.213.44.4

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 13% of September, with mostly cloudy or overcast conditions the remaining 43%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17129
27030
36832
46733
56634
66535
76436
86337
96238
106139
115941
125941
135842
145842
155743
165743
175644
185545
195446
205446
215347
225248
235248
245149
255050
264852
274852
284753
294654
304654

Chance of precipitation in September

Any precipitation

Piraju gets around 92 mm of rain over 8.3 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 27% 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 (%)
118
219
320
420
521
622
722
823
923
1024
1124
1225
1325
1426
1526
1627
1727
1828
1929
2029
2130
2231
2332
2433
2533
2634
2735
2835
2935
3036

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the comfortable band about 43% of days. Sticky, muggy-or-worse air turns up on roughly 6% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
13746171
23646171
33545181
43545191
53444201
63444212
73343212
83343222
93243222
103143233
113044233
122944243
132845244
142745254
152645254
162545254
172445265
182445265
192345275
202344276
212243287
222143288
232142299
2420413010
2519403011
2619393012
2718383113
2818373114
2917363115
3017353216

Wind in September

Winds average 11 km/h in September, the windiest month of the year.

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
111calm
211calm
311calm
411calm
511calm
611calm
711calm
811calm
911calm
1011calm
1111calm
1211calm
1311calm
1411calm
1511calm
1611calm
1711calm
1811calm
1911calm
2011calm
2111calm
2211calm
2312calm
2412calm
2512calm
2612calm
2712calm
2812calm
2912calm
3011calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 30 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 42 minutes over September. Sunrise moves from 7:31 AM to 7:01 AM, and sunset from 7:03 PM to 7:13 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.57:317:03
211.67:307:03
311.67:297:04
411.67:287:04
511.67:277:04
611.67:267:05
711.77:257:05
811.77:247:05
911.77:237:06
1011.77:227:06
1111.87:217:06
1211.87:207:07
1311.87:197:07
1411.87:187:07
1511.87:177:08
1611.97:167:08
1711.97:157:08
1811.97:147:09
1911.97:137:09
2012.07:127:09
2112.07:117:09
2212.07:097:10
2312.07:087:10
2412.17:077:10
2512.17:067:11
2612.17:057:11
2712.17:047:11
2812.17:037:12
2912.27:027:12
3012.27:017:13

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.14 kWh/m².

For context, solar energy here swings from a low near 3.33 kWh/m² to a high of 5.91 kWh/m² in December across the year — September's 5.14 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.0Bright
25.0Bright
35.0Bright
45.0Bright
55.0Bright
65.1Bright
75.1Bright
85.1Bright
95.1Bright
105.1Bright
115.1Bright
125.1Bright
135.1Bright
145.1Bright
155.2Bright
165.2Bright
175.2Bright
185.2Bright
195.2Bright
205.2Bright
215.2Bright
225.2Bright
235.2Bright
245.2Bright
255.2Bright
265.2Bright
275.2Bright
285.2Bright
295.3Bright
305.3Bright
Planning a trip in September

Hazard calendar for Piraju

In seasonPeak

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

Piraju's rainy season runs October–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 Piraju?

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

6.9
Sightseeing
5th-best month of the year
7.0
Beach & pool
3rd-best month of the year

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

What to pack for Piraju in September

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

In September, Piraju sees daytime highs around 27°C and nights near 16°C. Worth packing: light clothes, rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Piraju in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Piraju peaks around January 21 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 12 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighVery highExtremeJan 21UV 15Jul 12UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar12Extreme
Apr9Very high
May7High
Jun6High
Jul5High
Aug8Very high
Sep8Very high
Oct11Extreme
Nov13Extreme
Dec14Extreme

Air quality in Piraju 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 Piraju is worst in September — around 16 µg/m³ PM2.5 (moderate), about 2.4× the cleanest month (March, 7 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 1216 µg/m³Mar 187 µg/m³
PM2.5 (µg/m³)Level
Jan8Good
Feb7Good
Mar7Good
Apr7Good
May8Good
Jun9Good
Jul9Good
Aug15Moderate
Sep16Moderate
Oct11Good
Nov7Good
Dec7Good
Location & terrain

Where is Piraju?

Piraju sits at 23.2°S, 49.4°W, 561 m above sea level, in Brazil. The nearest listed city is Fartura, 25 km away.

Topography around Piraju

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

Within 3 km, the terrain around Piraju has significant variations in elevation — a maximum elevation change of 259 m around an average of 580 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 441 m; within 80 km, significant variations in elevation — a maximum elevation change of 597 m.

The land around Piraju is covered by trees (34%) and grassland (33%) within 3 km, cropland (39%), trees (33%) and grassland (23%) within 16 km, and cropland (43%), trees (29%) and grassland (23%) within 80 km.

3 km
259 m
16 km
441 m
80 km
597 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Fartura 25 km · Cerqueira César 28 km · Itaí 39 km · Taquarituba 40 km · Santa Cruz do Rio Pardo 41 km · Carlópolis 43 km · Avaré 48 km · Ourinhos 55 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 Piraju (-23.1936°, -49.3839°, elevation 561 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).