Diamantina weather in September

In September, Diamantina sees average daytime highs of 26°C and overnight lows near 14°C, with 36 mm of rain across 5.7 wet days and about 11.9 hours of daylight. It is the 5th-warmest and 8th-wettest month of the year here.

Day-to-day highs hold fairly steady near 26°C through the month. The sky is clear or mostly clear about 43% of the time in September, and the air most often feels dry.

Daylight stretches from about 11 h 36 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Diamantina's 3rd-clearest and 1st-windiest month. For the whole year in context, see Diamantina's year-round climate.

Daytime high
26°
5th warmest
Overnight low
14°
5th coldest
Rainfall
36 mm
5.7 wet days
Daylight
11 h 54 min
6:52 AM – 6:46 PM
Cloud cover
48%
3rd clearest
Wind
9 km/h
1st windiest
Solar energy
5.59 kWh/m²
Travel score
7.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 26°C through the month.

A typical September day in Diamantina reaches about 26°C in the afternoon and slips back to 14°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 22°C and 31°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)
12613
22613
32613
42614
52614
62614
72614
82614
92614
102614
112614
122614
132614
142614
152614
162614
172615
182715
192715
202715
212715
222715
232715
242715
252715
262715
272715
282715
292715
302716

Diamantina weather by month

How September compares with the rest of the year at a glance. September is the 5th-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan27° / 18°18816.3135.4
Feb27° / 18°12612.512.65.8
Mar27° / 18°14715.812.15.6
Apr26° / 16°7610.711.66.6
May24° / 14°265.411.27.7
Jun23° / 13°81.910.98.3
Jul23° / 12°61.5118.5
Aug24° / 13°92.311.48.5
Sep26° / 14°365.711.97.4
Oct27° / 16°10511.112.46.3
Nov26° / 17°22618.912.95.0
Dec26° / 18°27020.313.14.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 43% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 19% of September, with mostly cloudy or overcast conditions the remaining 38%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17327
27327
37327
47228
57129
67129
77030
86931
96832
106733
116733
126634
136535
146436
156337
166238
176040
186040
195842
205743
215644
225446
235347
245248
255248
265149
275050
284951
294951
304951

Chance of precipitation in September

Any precipitation

Diamantina gets around 36 mm of rain over 5.7 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 19% and peaks near 32% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
19
29
39
49
510
610
710
811
911
1012
1113
1214
1315
1416
1517
1619
1720
1822
1923
2024
2126
2227
2328
2429
2530
2630
2731
2831
2932
3032

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 49% of days. It rarely turns muggy — the humid and sticky bands barely register.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)
1663040
2663040
3663040
4663040
5663040
6653050
7653050
8633160
9633160
10613270
11593380
12573490
135535100
145336110
155137120
164937130
174738141
184539161
194339171
204139191
213940201
223840221
233640231
243539252
253339262
263239272
273138292
283038302
292938313
302838313

Wind in September

Winds average 9 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 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
189calm
199calm
209calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 36 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 30 minutes over September. Sunrise moves from 7:05 AM to 6:39 AM, and sunset from 6:43 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.67:056:43
211.77:046:43
311.77:036:44
411.77:026:44
511.77:026:44
611.77:016:44
711.77:006:44
811.86:596:44
911.86:586:45
1011.86:576:45
1111.86:566:45
1211.86:556:45
1311.86:546:45
1411.96:546:45
1511.96:536:46
1611.96:526:46
1711.96:516:46
1811.96:506:46
1912.06:496:46
2012.06:486:46
2112.06:476:46
2212.06:466:47
2312.06:456:47
2412.06:456:47
2512.16:446:47
2612.16:436:47
2712.16:426:48
2812.16:416:48
2912.16:406:48
3012.16:396:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.59 kWh/m².

For context, solar energy here swings from a low near 3.89 kWh/m² to a high of 6.02 kWh/m² in February across the year — September's 5.59 kWh/m² falls in the middle.

0246151015202530
Solar energy (kWh/m²)Level
15.4Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Diamantina

In seasonPeak

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

Diamantina'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 Diamantina?

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

7.4
Sightseeing
5th-best month of the year
7.2
Beach & pool
2nd-best month of the year

September is one of the better times to visit Diamantina for general sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Diamantina in September

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

In September, Diamantina sees daytime highs around 26°C and nights near 14°C. Worth packing: light clothes and sun protection. About 6 days see rain.

light clothessun protection

UV index in Diamantina 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 Diamantina peaks around February 13 at about 15 (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 13UV 15Jun 23UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar14Extreme
Apr11Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep12Extreme
Oct13Extreme
Nov14Extreme
Dec14Extreme

Air quality in Diamantina 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 Diamantina is worst in September — around 15 µg/m³ PM2.5 (moderate), about 4.1× the cleanest month (July, 4 µg/m³).

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

01020JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodSep 2015 µg/m³Jul 144 µg/m³
PM2.5 (µg/m³)Level
Jan5Good
Feb6Good
Mar5Good
Apr5Good
May5Good
Jun4Good
Jul4Good
Aug5Good
Sep15Moderate
Oct12Moderate
Nov7Good
Dec6Good
Location & terrain

Where is Diamantina?

Diamantina sits at 18.2°S, 43.6°W, 1,281 m above sea level, in Brazil. The nearest listed city is Serro, 46 km away.

Topography around Diamantina

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

Within 3 km, the terrain around Diamantina has significant variations in elevation — a maximum elevation change of 317 m around an average of 1,224 m above sea level; within 16 km, large variations in elevation — a maximum elevation change of 868 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,528 m.

The land around Diamantina is covered by grassland (65%) within 3 km, grassland (68%) and trees (26%) within 16 km, and trees (46%) and grassland (42%) within 80 km.

3 km
317 m
16 km
868 m
80 km
1,528 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Serro 46 km · Itamarandiba 90 km · Conceição do Mato Dentro 90 km · Corinto 91 km · Guanhães 92 km · São João Evangelista 95 km · Curvelo 104 km · Peçanha 115 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 Diamantina (-18.2469°, -43.6035°, elevation 1,281 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).