Planaltina weather in September

In September, Planaltina sees average daytime highs of 30°C and overnight lows near 18°C, with 25 mm of rain across 4.7 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 30°C through the month. The sky is clear or mostly clear about 49% 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 Planaltina's 4th-clearest and 3rd-windiest month. For the whole year in context, see Planaltina's year-round climate.

Daytime high
30°
1st warmest
Overnight low
18°
5th coldest
Rainfall
25 mm
4.7 wet days
Daylight
11 h 54 min
7:08 AM – 7:02 PM
Cloud cover
41%
4th clearest
Wind
9 km/h
3rd windiest
Solar energy
6.19 kWh/m²
Travel score
5.7
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 30°C through the month.

A typical September day in Planaltina reaches about 30°C in the afternoon and slips back to 18°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 27°C and 33°C. Set against its neighbours, September runs about 2°C warmer than August and on par with October.

10°15°20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13017
23017
33017
43017
53017
63017
73017
83017
93017
103018
113018
123018
133018
143018
153018
163018
173018
183018
193018
203018
213018
223018
233019
243019
253019
263019
273019
283019
293019
303019

Planaltina 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
Jan27° / 19°19521.712.84.6
Feb27° / 19°1691912.54.7
Mar27° / 19°17320.812.14.8
Apr28° / 18°7012.111.76.1
May27° / 16°143.311.37.6
Jun27° / 15°30.511.18.4
Jul27° / 14°0011.28.7
Aug28° / 16°41.111.57.6
Sep30° / 18°254.711.95.7
Oct30° / 19°9913.712.44.7
Nov28° / 19°20322.212.74.3
Dec27° / 19°21922.412.94.4

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 49% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 22% of September, with mostly cloudy or overcast conditions the remaining 29%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28218
38119
48119
58020
68020
77921
87921
97822
107723
117624
127624
137426
147426
157327
167228
177129
187030
196832
206733
216535
226436
236337
246238
256139
265941
275842
285842
295743
305743

Chance of precipitation in September

Any precipitation

Planaltina gets around 25 mm of rain over 4.7 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 16% and peaks near 30% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
17
27
37
47
57
68
78
88
99
109
1110
1211
1312
1412
1514
1615
1716
1817
1919
2020
2121
2223
2324
2425
2526
2627
2728
2829
2930
3030

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 62% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1801460
2801460
3791470
4791470
5791470
6791470
7781480
8781480
9771580
10761590
11761590
127416100
137217110
147118110
156819121
166620131
176421141
186122161
195923171
205624191
215325202
225125222
234826242
244526263
254327273
264127293
273927304
283727324
293627334
303527345

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 8 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
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
219calm
229calm
239calm
249calm
259calm
269calm
278calm
288calm
298calm
308calm

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 7:20 AM to 6:56 AM, and sunset from 7:01 PM to 7:04 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.77:207:01
211.77:197:01
311.77:187:01
411.77:177:01
511.87:167:01
611.87:167:02
711.87:157:02
811.87:147:02
911.87:137:02
1011.87:127:02
1111.87:127:02
1211.97:117:02
1311.97:107:02
1411.97:097:02
1511.97:087:02
1611.97:087:02
1711.97:077:02
1811.97:067:02
1912.07:057:03
2012.07:047:03
2112.07:037:03
2212.07:037:03
2312.07:027:03
2412.07:017:03
2512.07:007:03
2612.16:597:03
2712.16:597:03
2812.16:587:03
2912.16:577:04
3012.16:567:04

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.19 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.71 kWh/m² to a high of 6.19 kWh/m² in September across the year — September's 6.19 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.0Intense
26.1Intense
36.1Intense
46.1Intense
56.1Intense
66.2Intense
76.2Intense
86.2Intense
96.2Intense
106.2Intense
116.2Intense
126.2Intense
136.2Intense
146.2Intense
156.2Intense
166.2Intense
176.2Intense
186.2Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.2Intense
296.2Intense
306.2Intense
Planning a trip in September

Hazard calendar for Planaltina

In seasonPeak

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

Planaltina's monsoon runs October–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 Planaltina?

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

5.7
Sightseeing
6th-best month of the year
7.9
Beach & pool
4th-best month of the year

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

What to pack for Planaltina in September

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

In September, Planaltina sees daytime highs around 30°C and nights near 18°C. Pack light clothes and sun protection. About 5 days see rain.

light clothessun protection

UV index in Planaltina in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 13 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Planaltina peaks around February 16 at about 16 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 23 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 16Jun 23UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr12Extreme
May10Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep13Extreme
Oct13Extreme
Nov14Extreme
Dec13Extreme

Air quality in Planaltina 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 Planaltina is worst in September — around 32 µg/m³ PM2.5 (moderate), about 2.8× the cleanest month (January, 11 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateSep 1830 µg/m³Jan 1511 µg/m³
PM2.5 (µg/m³)Level
Jan11Good
Feb13Moderate
Mar15Moderate
Apr14Moderate
May15Moderate
Jun13Moderate
Jul13Moderate
Aug15Moderate
Sep32Moderate
Oct21Moderate
Nov13Moderate
Dec12Moderate
Location & terrain

Where is Planaltina?

Planaltina sits at 15.6°S, 47.6°W, 1,000 m above sea level, in Brazil. The nearest listed city is Sobradinho, 16 km away.

Topography around Planaltina

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

Within 3 km, the terrain around Planaltina has only modest variations in elevation — a maximum elevation change of 135 m around an average of 976 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 477 m; within 80 km, large variations in elevation — a maximum elevation change of 866 m.

The land around Planaltina is covered by artificial surfaces (40%) and grassland (20%) within 3 km, grassland (28%), trees (24%) and shrubs (22%) within 16 km, and grassland (33%), trees (26%) and cropland (20%) within 80 km.

3 km
135 m
16 km
477 m
80 km
866 m
treesshrubsgrasslandcroplandartificial surfaceswater
September weather nearby: Sobradinho 16 km · Planaltina 19 km · Itapoã 19 km · Sobradinho II 20 km · Paranoá 23 km · Lago Norte 26 km · Plano Piloto 32 km · Jardim Botânico 33 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 Planaltina (-15.6179°, -47.6487°, elevation 1,000 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).