Pires do Rio weather in September

In September, Pires do Rio sees average daytime highs of 31°C and overnight lows near 19°C, with 32 mm of rain across 5.4 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 31°C through the month. The sky is clear or mostly clear about 56% 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 Pires do Rio's 4th-clearest and 2nd-windiest month. For the whole year in context, see Pires do Rio's year-round climate.

Daytime high
31°
1st warmest
Overnight low
19°
6th coldest
Rainfall
32 mm
5.4 wet days
Daylight
11 h 54 min
7:10 AM – 7:05 PM
Cloud cover
39%
4th clearest
Wind
10 km/h
2nd windiest
Solar energy
6.07 kWh/m²
Travel score
5.0
out of 10

Pires do Rio 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 31°C through the month.

A typical September day in Pires do Rio reaches about 31°C in the afternoon and slips back to 19°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°151015202530
Avg high (°C)Avg low (°C)
13118
23118
33118
43118
53118
63118
73118
83118
93118
103119
113119
123219
133219
143219
153219
163219
173219
183219
193219
203219
213219
223219
233219
243219
253220
263220
273220
283220
293220
303220

Pires do Rio 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
Jan29° / 20°23921.912.93.9
Feb29° / 20°17518.312.64.1
Mar29° / 20°17219.412.14.3
Apr29° / 19°6810.211.65.6
May28° / 17°172.611.27.4
Jun27° / 15°60.9118.2
Jul28° / 15°20.311.18.2
Aug30° / 16°61.111.46.7
Sep31° / 19°325.411.95.0
Oct31° / 20°10413.712.44.1
Nov29° / 20°20921.612.83.8
Dec29° / 20°25524.1133.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 56% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 16% of September, with mostly cloudy or overcast conditions the remaining 28%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28218
38218
48218
58218
68119
78020
88020
97921
107921
117723
127723
137624
147525
157426
167426
177228
187129
197129
206931
216832
226634
236535
246436
256238
266238
276040
286040
295941
305842

Chance of precipitation in September

Any precipitation

Pires do Rio gets around 32 mm of rain over 5.4 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 19% and peaks near 34% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
18
28
39
49
59
610
710
810
911
1012
1112
1213
1314
1415
1516
1617
1718
1819
1921
2022
2123
2225
2326
2428
2529
2630
2732
2833
2934
3034

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 52% of days. Sticky, muggy-or-worse air turns up on roughly 7% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1721891
2721891
3711991
4701992
5701992
66919102
76919102
86720112
96620113
106421123
116421123
126222133
135923144
145823154
155524165
165425165
175225176
184926186
194727197
204427208
214228219
2240282210
2337282411
2435282512
2533272613
2632272715
2730262816
2829262917
2928253018
3027243019

Wind in September

Winds average 10 km/h in September.

Across September, daily wind ranges from about 9 km/h on the calmest days to 10 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
110calm
210calm
310calm
410calm
510calm
610calm
710calm
810calm
910calm
1010calm
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

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 7:23 AM to 6:58 AM, and sunset from 7:03 PM to 7:07 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:237:03
211.77:227:03
311.77:217:03
411.77:217:03
511.77:207:03
611.77:197:03
711.87:187:03
811.87:177:04
911.87:167:04
1011.87:167:04
1111.87:157:04
1211.87:147:04
1311.97:137:04
1411.97:127:04
1511.97:117:04
1611.97:107:05
1711.97:097:05
1811.97:097:05
1912.07:087:05
2012.07:077:05
2112.07:067:05
2212.07:057:05
2312.07:047:05
2412.07:037:06
2512.17:037:06
2612.17:027:06
2712.17:017:06
2812.17:007:06
2912.16:597:06
3012.16:587:07

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.07 kWh/m².

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.19 kWh/m² in October across the year — September's 6.07 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.9Bright
25.9Bright
35.9Bright
46.0Bright
56.0Bright
66.0Intense
76.0Intense
86.0Intense
96.0Intense
106.1Intense
116.1Intense
126.1Intense
136.1Intense
146.1Intense
156.1Intense
166.1Intense
176.1Intense
186.1Intense
196.1Intense
206.1Intense
216.1Intense
226.1Intense
236.1Intense
246.1Intense
256.1Intense
266.1Intense
276.1Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Pires do Rio

In seasonPeak

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

Pires do Rio's monsoon runs November–March, 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 Pires do Rio?

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

5.0
Sightseeing
6th-best month of the year
7.5
Beach & pool
5th-best month of the year

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

What to pack for Pires do Rio in September

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

In September, Pires do Rio sees daytime highs around 31°C and nights near 19°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Pires do Rio 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 Pires do Rio peaks around February 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 21 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 13UV 15Jun 21UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec14Extreme
Location & terrain

Where is Pires do Rio?

Pires do Rio sits at 17.3°S, 48.3°W, 770 m above sea level, in Brazil. The nearest listed city is Orizona, 30 km away.

Topography around Pires do Rio

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

Within 3 km, the terrain around Pires do Rio has only modest variations in elevation — a maximum elevation change of 147 m around an average of 729 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 341 m; within 80 km, large variations in elevation — a maximum elevation change of 608 m.

The land around Pires do Rio is covered by grassland (38%), trees (25%) and artificial surfaces (22%) within 3 km, grassland (43%), trees (28%) and cropland (26%) within 16 km, and cropland (34%), grassland (33%) and trees (27%) within 80 km.

3 km
147 m
16 km
341 m
80 km
608 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Orizona 30 km · Ipameri 49 km · Caldas Novas 62 km · Piracanjuba 78 km · Silvânia 79 km · Bela Vista de Goiás 80 km · Cristalina 92 km · Morrinhos 99 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 Pires do Rio (-17.2997°, -48.2794°, elevation 770 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).