Diamantino weather in September

In September, Diamantino sees average daytime highs of 33°C and overnight lows near 21°C, with 48 mm of rain across 8.5 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 33°C through the month. The sky is clear or mostly clear about 49% of the time in September, and the air most often feels muggy.

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 Diamantino's 4th-clearest and 3rd-windiest month. For the whole year in context, see Diamantino's year-round climate.

Daytime high
33°
1st warmest
Overnight low
21°
5th coldest
Rainfall
48 mm
8.5 wet days
Daylight
11 h 54 min
6:42 AM – 6:38 PM
Cloud cover
45%
4th clearest
Wind
8 km/h
3rd windiest
Solar energy
5.78 kWh/m²
Travel score
3.6
out of 10

Diamantino is human settlement in Diamantino municipality, 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 33°C through the month.

A typical September day in Diamantino reaches about 33°C in the afternoon and slips back to 21°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 28°C and 37°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)
13320
23320
33321
43321
53321
63321
73321
83321
93321
103321
113421
123421
133321
143321
153321
163321
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273322
283322
293322
303322

How September really feels in Diamantino

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.

Diamantino 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
Jan30° / 22°2672712.82.9
Feb30° / 22°24524.912.52.8
Mar31° / 22°22626.212.12.9
Apr31° / 22°1101711.73.9
May30° / 20°34611.35.5
Jun30° / 19°91.311.26.2
Jul31° / 18°40.811.26.2
Aug33° / 19°111.911.54.8
Sep33° / 21°488.511.93.6
Oct33° / 22°13018.912.33.0
Nov31° / 22°1932312.72.9
Dec31° / 22°2242612.82.9

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 20% of September, with mostly cloudy or overcast conditions the remaining 31%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18317
28317
38119
48119
57921
67921
77822
87723
97525
107525
117327
127327
137228
147129
157030
166931
176931
186733
196733
206535
216535
226337
236337
246139
256040
265842
275842
285644
295545
305347

Chance of precipitation in September

Any precipitation

Diamantino gets around 48 mm of rain over 8.5 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 29% and peaks near 48% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
114
215
316
417
517
618
718
819
920
1021
1122
1223
1324
1425
1526
1627
1728
1830
1931
2033
2134
2236
2338
2439
2541
2642
2744
2845
2947
3048

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 31% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1122331268
2122330279
3112229289
41121292810
51121282911
61120272912
71120273013
81019263014
91018263115
10917253117
11917253118
12816253220
13815253221
14714243323
15613243324
16512243326
17511243327
18410233329
19410233331
2039223333
2138213334
2238203336
2327193339
2427183341
2526173343
2625163245
2715153247
2814143249
2914133151
3014123152

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:54 AM to 6:32 AM, and sunset from 6:37 PM to 6:39 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:546:37
211.76:536:37
311.76:536:37
411.86:526:37
511.86:516:37
611.86:506:37
711.86:496:37
811.86:496:37
911.86:486:37
1011.86:476:37
1111.96:466:38
1211.96:466:38
1311.96:456:38
1411.96:446:38
1511.96:436:38
1611.96:426:38
1711.96:426:38
1811.96:416:38
1912.06:406:38
2012.06:396:38
2112.06:396:38
2212.06:386:38
2312.06:376:38
2412.06:366:38
2512.06:356:38
2612.16:356:38
2712.16:346:38
2812.16:336:38
2912.16:326:38
3012.16:326:39

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.78 kWh/m².

For context, solar energy here swings from a low near 4.51 kWh/m² to a high of 5.94 kWh/m² in October across the year — September's 5.78 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.7Bright
35.7Bright
45.7Bright
55.7Bright
65.7Bright
75.7Bright
85.7Bright
95.7Bright
105.8Bright
115.8Bright
125.8Bright
135.8Bright
145.8Bright
155.8Bright
165.8Bright
175.8Bright
185.8Bright
195.8Bright
205.8Bright
215.8Bright
225.8Bright
235.8Bright
245.8Bright
255.8Bright
265.8Bright
275.8Bright
285.8Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Diamantino

In seasonPeak

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

Diamantino'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 Diamantino?

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

3.6
Sightseeing
6th-best month of the year
6.5
Beach & pool
5th-best month of the year

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

What to pack for Diamantino in September

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

In September, Diamantino sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: rain gear and sun protection. About 9 days see rain.

light clothesrain gearsun protection

UV index in Diamantino in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 5 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Diamantino peaks around January 22 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeJan 22UV 15Sep 15UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep5Moderate
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Diamantino 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 Diamantino is worst in September — around 50 µg/m³ PM2.5 (poor), about 7.8× the cleanest month (July, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateGoodSep 1646 µg/m³Jul 107 µg/m³
PM2.5 (µg/m³)Level
Jan9Good
Feb9Good
Mar10Good
Apr9Good
May8Good
Jun7Good
Jul6Good
Aug20Moderate
Sep50Poor
Oct20Moderate
Nov11Good
Dec10Good
Location & terrain

Where is Diamantino?

Diamantino sits at 14.4°S, 56.4°W, 282 m above sea level, in Brazil. The nearest listed city is Nobres, 37 km away.

Topography around Diamantino

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

Within 3 km, the terrain around Diamantino has only modest variations in elevation — a maximum elevation change of 237 m around an average of 303 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 327 m; within 80 km, significant variations in elevation — a maximum elevation change of 542 m.

The land around Diamantino is covered by trees (49%) and grassland (32%) within 3 km, trees (47%), grassland (23%) and cropland (22%) within 16 km, and trees (45%), grassland (29%) and cropland (22%) within 80 km.

3 km
237 m
16 km
327 m
80 km
542 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Nobres 37 km · Rosário Oeste 48 km · Nova Mutum 75 km · Nova Olímpia 100 km · Barra do Bugres 108 km · Tangará da Serra 114 km · Cuiabá 137 km · Chapada dos Guimarães 139 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 Diamantino (-14.4086°, -56.4461°, elevation 282 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).