Nova Mutum weather in September

In September, Nova Mutum sees average daytime highs of 33°C and overnight lows near 21°C, with 43 mm of rain across 8.3 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 48% 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 Nova Mutum's 4th-clearest and 4th-windiest month. For the whole year in context, see Nova Mutum's year-round climate.

Daytime high
33°
1st warmest
Overnight low
21°
6th coldest
Rainfall
43 mm
8.3 wet days
Daylight
11 h 54 min
6:41 AM – 6:36 PM
Cloud cover
45%
4th clearest
Wind
8 km/h
4th windiest
Solar energy
5.87 kWh/m²
Travel score
3.6
out of 10

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 Nova Mutum 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 29°C and 36°C. Set against its neighbours, September runs on par with August and about 1°C warmer than October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13321
23321
33321
43321
53321
63321
73321
83321
93421
103421
113421
123421
133421
143422
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273322
283322
293322
303322

How September really feels in Nova Mutum

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.

Nova Mutum 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°25926.412.73.1
Feb30° / 22°23425.112.53.0
Mar30° / 22°20125.612.13.1
Apr30° / 21°9715.811.74.1
May30° / 20°255.211.45.4
Jun31° / 19°60.911.26.0
Jul31° / 18°20.411.36.1
Aug33° / 20°91.611.54.7
Sep33° / 21°438.311.93.6
Oct32° / 22°12418.612.33.1
Nov31° / 22°19523.912.63.0
Dec30° / 22°23926.312.83.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 48% 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 30%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18218
28119
38020
47921
57921
67822
77822
87723
97723
107525
117525
127525
137426
147327
157327
167129
177129
187030
196931
206832
216634
226535
236337
246139
255941
265941
275743
285545
295446
305248

Chance of precipitation in September

Any precipitation

Nova Mutum gets around 43 mm of rain over 8.3 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 28% and peaks near 47% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
113
214
315
415
516
617
718
818
919
1020
1121
1222
1323
1424
1525
1626
1727
1828
1930
2031
2133
2235
2337
2438
2540
2642
2743
2845
2946
3047

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 32% of days. Sticky, muggy-or-worse air turns up on roughly 55% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1152729236
2152628247
3152528248
4152428258
5142327269
61422272610
71422272711
81321262812
91320262813
101219262914
111118253015
121018253116
131017253117
14916253219
15815253220
16714253322
17613243423
18512243424
19512233526
20411223527
21410213629
2239203731
2339193733
2438173735
2527163837
2626153839
2726143840
2825133842
2915133744
3014123746

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

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
198calm
208calm
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 6:52 AM to 6:30 AM, and sunset from 6:36 PM to 6:37 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.76:526:36
211.76:516:36
311.86:516:36
411.86:506:36
511.86:496:36
611.86:496:36
711.86:486:36
811.86:476:36
911.86:466:36
1011.86:466:36
1111.96:456:36
1211.96:446:36
1311.96:436:36
1411.96:426:36
1511.96:426:36
1611.96:416:36
1711.96:406:36
1812.06:396:36
1912.06:396:36
2012.06:386:36
2112.06:376:37
2212.06:366:37
2312.06:366:37
2412.06:356:37
2512.06:346:37
2612.16:336:37
2712.16:336:37
2812.16:326:37
2912.16:316:37
3012.16:306:37

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.87 kWh/m².

For context, solar energy here swings from a low near 4.65 kWh/m² to a high of 5.95 kWh/m² in October across the year — September's 5.87 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.7Bright
25.7Bright
35.8Bright
45.8Bright
55.8Bright
65.8Bright
75.8Bright
85.8Bright
95.8Bright
105.8Bright
115.8Bright
125.9Bright
135.9Bright
145.9Bright
155.9Bright
165.9Bright
175.9Bright
185.9Bright
195.9Bright
205.9Bright
215.9Bright
225.9Bright
235.9Bright
245.9Bright
255.9Bright
265.9Bright
275.9Bright
285.9Bright
295.9Bright
305.9Bright
Planning a trip in September

Hazard calendar for Nova Mutum

In seasonPeak

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

Nova Mutum'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 Nova Mutum?

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
6.6
Beach & pool
5th-best month of the year

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

What to pack for Nova Mutum in September

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

In September, Nova Mutum sees daytime highs around 33°C and nights near 21°C. Pack light clothes. Worth having: rain gear and sun protection. About 8 days see rain.

light clothesrain gearsun protection

UV index in Nova Mutum in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 6 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Nova Mutum peaks around January 24 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 6 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeJan 24UV 15Sep 15UV 6
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr12Extreme
May9Very high
Jun8Very high
Jul8Very high
Aug10Very high
Sep6High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Nova Mutum 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 Nova Mutum is worst in September — around 46 µg/m³ PM2.5 (poor), about 7.0× the cleanest month (July, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodGoodModeratePoorModerateSep 1743 µg/m³Jul 117 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar12Moderate
Apr11Good
May11Good
Jun8Good
Jul7Good
Aug18Moderate
Sep46Poor
Oct22Moderate
Nov13Moderate
Dec12Good
Location & terrain

Where is Nova Mutum?

Nova Mutum sits at 13.8°S, 56.1°W, 486 m above sea level, in Brazil. The nearest listed city is Diamantino, 75 km away.

Topography around Nova Mutum

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

Within 3 km, the terrain around Nova Mutum has only modest variations in elevation — a maximum elevation change of 95 m around an average of 462 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 149 m; within 80 km, significant variations in elevation — a maximum elevation change of 435 m.

The land around Nova Mutum is covered by artificial surfaces (34%) and cropland (28%) within 3 km, cropland (50%) and trees (35%) within 16 km, and trees (45%) and cropland (41%) within 80 km.

3 km
95 m
16 km
149 m
80 km
435 m
treesshrubsgrasslandcroplandartificial surfacesbare terrain
September weather nearby: Diamantino 75 km · Lucas do Rio Verde 86 km · Nobres 103 km · Rosário Oeste 118 km · Tapurah 130 km · Sorriso 148 km · Nova Olímpia 169 km · Tangará da Serra 175 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 Nova Mutum (-13.8289°, -56.0822°, elevation 486 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).