Dianópolis weather in September

In September, Dianópolis sees average daytime highs of 34°C and overnight lows near 22°C, with 18 mm of rain across 2.3 wet days and about 11.9 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 54% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Dianópolis's 4th-clearest and 3rd-windiest month. For the whole year in context, see Dianópolis's year-round climate.

Daytime high
34°
1st warmest
Overnight low
22°
11th coldest
Rainfall
18 mm
2.3 wet days
Daylight
11 h 54 min
6:04 AM – 6:00 PM
Cloud cover
39%
4th clearest
Wind
10 km/h
3rd windiest
Solar energy
6.4 kWh/m²
Travel score
3.5
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical September day in Dianópolis reaches about 34°C in the afternoon and slips back to 22°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 36°C. Set against its neighbours, September runs about 1°C warmer than August and about 1°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13421
23421
33421
43422
53422
63422
73422
83422
93422
103422
113422
123422
133422
143422
153422
163422
173422
183422
193422
203422
213422
223422
233422
243422
253423
263423
273423
283423
293423
303423

How September really feels in Dianópolis

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
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.

Dianópolis weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 21°26624.312.63.5
Feb29° / 21°23721.612.43.5
Mar30° / 21°24522.912.13.6
Apr30° / 21°11613.711.74.3
May31° / 20°294.311.55.1
Jun31° / 19°20.411.35.8
Jul31° / 19°0011.45.8
Aug33° / 20°10.211.64.7
Sep34° / 22°182.311.93.5
Oct33° / 22°9710.612.33.3
Nov31° / 22°22019.212.53.6
Dec30° / 21°24420.612.73.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 54% 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 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28317
38317
48218
58218
68218
78119
88119
98020
108020
117921
127921
137822
147822
157723
167723
177624
187525
197426
207327
217327
227228
237129
247030
256931
266931
276733
286634
296634
306535

Chance of precipitation in September

Any precipitation

Dianópolis gets around 18 mm of rain over 2.3 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 8% and peaks near 19% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
43
53
63
73
83
93
103
114
124
134
145
156
167
178
189
199
2010
2111
2212
2313
2414
2515
2615
2716
2817
2918
3019

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 9% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
16627520
26627520
36626620
46626620
56625720
66525730
76524830
86524830
96524830
106424930
116324940
1262241040
1361241140
1460241150
1559241250
1656241361
1754241471
1852241581
1950241691
20472517101
21452518121
22422519131
23392521141
24372522161
25342523171
26322424181
27302425201
28282426211
29272326222
30262327232

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 11 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
1110calm
1210calm
1310calm
1410calm
1510calm
1610calm
1710calm
1810calm
1910calm
2010calm
219calm
229calm
239calm
249calm
259calm
269calm
279calm
289calm
299calm
309calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 48 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 18 minutes over September. Sunrise moves from 6:14 AM to 5:54 AM, and sunset from 6:00 PM to 5:59 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:146:00
211.86:136:00
311.86:126:00
411.86:126:00
511.86:116:00
611.86:106:00
711.86:106:00
811.86:096:00
911.96:086:00
1011.96:086:00
1111.96:076:00
1211.96:066:00
1311.96:066:00
1411.96:056:00
1511.96:046:00
1611.96:046:00
1711.96:036:00
1812.06:026:00
1912.06:016:00
2012.06:016:00
2112.06:006:00
2212.05:595:59
2312.05:595:59
2412.05:585:59
2512.05:575:59
2612.05:575:59
2712.15:565:59
2812.15:555:59
2912.15:555:59
3012.15:545:59

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.4 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 5.07 kWh/m² to a high of 6.4 kWh/m² in September across the year — September's 6.4 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.3Intense
26.3Intense
36.3Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.4Intense
176.4Intense
186.4Intense
196.4Intense
206.4Intense
216.4Intense
226.4Intense
236.4Intense
246.4Intense
256.4Intense
266.4Intense
276.4Intense
286.4Intense
296.4Intense
306.4Intense
Planning a trip in September

Hazard calendar for Dianópolis

In seasonPeak

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

Dianópolis'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 Dianópolis?

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

3.5
Sightseeing
9th-best month of the year
7.1
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Dianópolis. The water and warmth also suit a beach or pool day.

What to pack for Dianópolis in September

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

In September, Dianópolis sees daytime highs around 34°C and nights near 22°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Dianópolis 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 Dianópolis peaks around February 15 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 15UV 15Jun 22UV 9
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May10Extreme
Jun9Very high
Jul9Very high
Aug10Extreme
Sep13Extreme
Oct12Extreme
Nov13Extreme
Dec12Extreme

Air quality in Dianópolis 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 Dianópolis is worst in September — around 24 µg/m³ PM2.5 (moderate), about 5.1× the cleanest month (June, 5 µg/m³).

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

0102030JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 2023 µg/m³Jun 185 µg/m³
PM2.5 (µg/m³)Level
Jan7Good
Feb7Good
Mar7Good
Apr6Good
May6Good
Jun5Good
Jul5Good
Aug13Moderate
Sep24Moderate
Oct21Moderate
Nov9Good
Dec8Good
Location & terrain

Where is Dianópolis?

Dianópolis sits at 11.6°S, 46.8°W, 699 m above sea level, in Brazil. The nearest listed city is Luis Eduardo Magalhães, 124 km away.

Topography around Dianópolis

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

Within 3 km, the terrain around Dianópolis has only modest variations in elevation — a maximum elevation change of 170 m around an average of 684 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 430 m; within 80 km, large variations in elevation — a maximum elevation change of 655 m.

The land around Dianópolis is covered by trees (50%) and grassland (20%) within 3 km, trees (41%), grassland (29%) and shrubs (28%) within 16 km, and grassland (35%), shrubs (31%) and trees (20%) within 80 km.

3 km
170 m
16 km
430 m
80 km
655 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Luis Eduardo Magalhães 124 km · Campos Belos 157 km · Formosa do Rio Preto 189 km · Porto Nacional 202 km · Barreiras 208 km · Riachão das Neves 208 km · São Desidério 217 km · Corrente 224 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 Dianópolis (-11.6278°, -46.8206°, elevation 699 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).