Tuntum weather in September

In September, Tuntum sees average daytime highs of 35°C and overnight lows near 24°C, with 8 mm of rain across 1.8 wet days and about 12 hours of daylight. It is the 1st-warmest and 10th-wettest month of the year here.

Day-to-day highs hold fairly steady near 35°C through the month. The sky is clear or mostly clear about 69% of the time in September, and the air most often feels muggy.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Tuntum's 2nd-clearest and 3rd-windiest month. For the whole year in context, see Tuntum's year-round climate.

Daytime high
35°
1st warmest
Overnight low
24°
9th coldest
Rainfall
8 mm
1.8 wet days
Daylight
12 hours
5:54 AM – 5:52 PM
Cloud cover
33%
2nd clearest
Wind
8 km/h
3rd windiest
Solar energy
6.4 kWh/m²
Travel score
3.0
out of 10

Tuntum is settlement in 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 35°C through the month.

A typical September day in Tuntum reaches about 35°C in the afternoon and slips back to 24°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 37°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113523
123523
133523
143523
153524
163524
173524
183524
193524
203524
213524
223524
233524
243524
253524
263524
273524
283524
293524
303524

How September really feels in Tuntum

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
1 feel dangerously hot (≥ 39°C)
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.

Tuntum weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 10th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan31° / 23°20525.712.32.8
Feb31° / 23°20724.112.22.8
Mar31° / 23°23427.6122.7
Apr31° / 23°18122.611.93.1
May31° / 23°861311.84.1
Jun32° / 23°132.911.74.8
Jul33° / 22°71.211.74.5
Aug34° / 23°30.511.83.8
Sep35° / 24°81.8123.0
Oct35° / 24°224.312.12.9
Nov34° / 24°6810.212.23.0
Dec33° / 24°1221712.33.0

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 69% 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 11%.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
1919
2919
39010
49010
59010
6919
7919
8919
9919
10919
119010
129010
139010
14919
159010
169010
179010
189010
199010
208911
218911
228911
238911
248812
258812
268713
278713
288614
298515
308515

Chance of precipitation in September

Any precipitation

Tuntum gets around 8 mm of rain over 1.8 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 6% and peaks near 9% on the wettest days.

0%10%20%30%151015202530
Rain chance (%)
13
24
34
44
54
64
75
85
95
105
115
125
135
145
155
165
175
186
196
206
216
227
237
247
258
268
278
288
298
309

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 43% of days. Sticky, muggy-or-worse air turns up on roughly 81% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
13254231
23254231
33244231
43244231
53244230
63244230
73244330
83234330
93234430
103224430
113224531
123214531
133204532
143194533
153184534
162174535
172164537
182154538
192144440
202134442
211114344
221114345
231104247
24194249
25184150
26174052
27174052
28063955
29063955
30053956

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 8 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
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
288calm
298calm
308calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:01 AM to 5:47 AM, and sunset from 5:55 PM to 5:49 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:015:55
211.96:015:55
311.96:005:55
411.96:005:55
511.95:595:54
611.95:595:54
711.95:585:54
811.95:585:54
911.95:575:54
1011.95:575:53
1111.95:565:53
1212.05:565:53
1312.05:555:53
1412.05:555:53
1512.05:545:52
1612.05:545:52
1712.05:535:52
1812.05:535:52
1912.05:525:51
2012.05:525:51
2112.05:515:51
2212.05:515:51
2312.05:505:51
2412.05:505:50
2512.05:495:50
2612.05:495:50
2712.05:485:50
2812.05:485:50
2912.05:475:49
3012.05:475:49

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 4.46 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
46.3Intense
56.3Intense
66.4Intense
76.4Intense
86.4Intense
96.4Intense
106.4Intense
116.4Intense
126.4Intense
136.4Intense
146.4Intense
156.4Intense
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 Tuntum

In seasonPeak

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

Tuntum's monsoon runs December–April, 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 Tuntum?

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

3.0
Sightseeing
6th-best month of the year
6.7
Beach & pool
4th-best month of the year

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

What to pack for Tuntum in September

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

In September, Tuntum sees daytime highs around 35°C and nights near 24°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Tuntum 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 Tuntum peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 17 at about 10 (extreme).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeMar 13UV 15Jul 17UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Extreme
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov11Extreme
Dec11Extreme

Air quality in Tuntum 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 Tuntum is worst in October — around 36 µg/m³ PM2.5 (poor), about 5.1× the cleanest month (June, 7 µg/m³).

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

010203040JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateOct 1834 µg/m³Jun 197 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb14Moderate
Mar13Moderate
Apr12Good
May9Good
Jun7Good
Jul8Good
Aug16Moderate
Sep22Moderate
Oct36Poor
Nov27Moderate
Dec18Moderate
Location & terrain

Where is Tuntum?

Tuntum sits at 5.3°S, 44.6°W, 109 m above sea level, in Brazil. The nearest listed city is Presidente Dutra, 18 km away.

Topography around Tuntum

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

Within 3 km, the terrain around Tuntum has only modest variations in elevation — a maximum elevation change of 93 m around an average of 109 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 163 m; within 80 km, significant variations in elevation — a maximum elevation change of 392 m.

The land around Tuntum is covered by grassland (61%) and trees (31%) within 3 km, grassland (57%) and trees (38%) within 16 km, and trees (57%) and grassland (41%) within 80 km.

3 km
93 m
16 km
163 m
80 km
392 m
treesshrubsgrasslandcroplandartificial surfaceswaterwetland
September weather nearby: Presidente Dutra 18 km · Dom Pedro 34 km · São Domingos do Maranhão 46 km · Esperantinópolis 50 km · Poção de Pedras 65 km · Barra do Corda 71 km · Fortuna 76 km · Trizidela do Vale 76 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 Tuntum (-5.2581°, -44.6489°, elevation 109 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).