Humaitá weather in September

In September, Humaitá sees average daytime highs of 32°C and overnight lows near 24°C, with 123 mm of rain across 17.9 wet days and about 12 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 32°C through the month. The sky is clear or mostly clear about 26% of the time in September, and the air most often feels miserable.

Daylight stretches from about 11 h 54 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Humaitá's 4th-clearest and 3rd-windiest month. For the whole year in context, see Humaitá's year-round climate.

Daytime high
32°
2nd warmest
Overnight low
24°
11th coldest
Rainfall
123 mm
17.9 wet days
Daylight
12 hours
6:08 AM – 6:05 PM
Cloud cover
61%
4th clearest
Wind
5 km/h
3rd windiest
Solar energy
5.39 kWh/m²
Travel score
3.2
out of 10

Humaitá 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 32°C through the month.

A typical September day in Humaitá reaches about 32°C in the afternoon and slips back to 24°C overnight — a 8°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 35°C. Set against its neighbours, September runs on par with August and on par with October.

20°25°30°35°151015202530
Avg high (°C)Avg low (°C)
13224
23224
33224
43224
53224
63224
73224
83224
93224
103224
113224
123224
133224
143224
153224
163224
173224
183224
193224
203224
213224
223224
233224
243224
253224
263224
273224
283224
293224
303224

How September really feels in Humaitá

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
17 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.

Humaitá weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°33029.212.42.7
Feb30° / 24°30926.412.22.7
Mar30° / 24°32129.212.12.7
Apr30° / 24°25527.111.82.8
May30° / 24°17424.311.73.3
Jun30° / 24°681311.64.5
Jul31° / 23°346.911.65.0
Aug32° / 24°569.511.84.0
Sep32° / 24°12317.9123.2
Oct32° / 24°18322.812.22.9
Nov31° / 24°23425.712.32.7
Dec30° / 24°29928.412.42.7

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 26% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 53%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16337
26139
36040
45842
55743
65644
75446
85347
95248
105050
114951
124852
134753
144753
154555
164555
174456
184357
194357
204258
214159
224159
234159
244060
254060
263961
273961
283961
293862
303763

Chance of precipitation in September

Any precipitation

Humaitá gets around 123 mm of rain over 17.9 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 58% and peaks near 64% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
151
252
353
454
555
655
755
856
956
1056
1157
1257
1357
1457
1558
1658
1759
1859
1960
2061
2161
2262
2362
2463
2563
2663
2763
2863
2964
3064

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the miserable band about 65% of days. Sticky, muggy-or-worse air turns up on roughly 100% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1164251
2154153
3154153
4144154
5144055
6134056
7133957
8133957
9133858
10033760
11033760
12023662
13023563
14023464
15023365
16023266
17023167
18023068
19022969
20022870
21012871
22012772
23012673
24012673
25012574
26012574
27012475
28012475
29012376
30012376

Wind in September

Winds average 5 km/h in September.

Across September, daily wind ranges from about 5 km/h on the calmest days to 5 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
15calm
25calm
35calm
45calm
55calm
65calm
75calm
85calm
95calm
105calm
115calm
125calm
135calm
145calm
155calm
165calm
175calm
185calm
195calm
205calm
215calm
225calm
235calm
245calm
255calm
265calm
275calm
285calm
295calm
305calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 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 12 minutes over September. Sunrise moves from 6:16 AM to 6:00 AM, and sunset from 6:07 PM to 6:03 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:166:07
211.96:166:07
311.96:156:07
411.96:156:07
511.96:146:07
611.96:136:07
711.96:136:07
811.96:126:06
911.96:126:06
1011.96:116:06
1111.96:116:06
1211.96:106:06
1311.96:096:06
1411.96:096:06
1512.06:086:05
1612.06:086:05
1712.06:076:05
1812.06:076:05
1912.06:066:05
2012.06:056:05
2112.06:056:04
2212.06:046:04
2312.06:046:04
2412.06:036:04
2512.06:026:04
2612.06:026:04
2712.06:016:04
2812.06:016:03
2912.16:006:03
3012.16:006:03

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.39 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.08 kWh/m² to a high of 5.39 kWh/m² in September across the year — September's 5.39 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.3Bright
55.3Bright
65.3Bright
75.3Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.4Bright
165.4Bright
175.4Bright
185.4Bright
195.4Bright
205.4Bright
215.4Bright
225.4Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Humaitá

In seasonPeak

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

Humaitá's rainy season runs October–May, when most of the year's rain falls.

Rainy season
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is September a good time to visit Humaitá?

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

3.2
Sightseeing
5th-best month of the year
5.2
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Humaitá.

What to pack for Humaitá in September

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

In September, Humaitá sees daytime highs around 32°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 18 days see rain.

light clothesrain gearsun protection

UV index in Humaitá 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 Humaitá peaks around March 13 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 11 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeMar 13UV 15Sep 11UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug6High
Sep5Moderate
Oct10Extreme
Nov13Extreme
Dec13Extreme

Air quality in Humaitá 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 Humaitá is worst in August — around 84 µg/m³ PM2.5 (unhealthy), about 9.2× the cleanest month (June, 9 µg/m³).

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

0306090JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateAug 2181 µg/m³Jun 109 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar14Moderate
Apr11Good
May10Good
Jun9Good
Jul18Moderate
Aug84Unhealthy
Sep69Unhealthy
Oct23Moderate
Nov18Moderate
Dec16Moderate
Location & terrain

Where is Humaitá?

Humaitá sits at 7.5°S, 63.0°W, 54 m above sea level, in Brazil. The nearest listed city is Candeias do Jamari, 161 km away.

Alto ParaísoAriquemes

Topography around Humaitá

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

Within 3 km, the terrain around Humaitá has only modest variations in elevation — a maximum elevation change of 38 m around an average of 51 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 45 m; within 80 km, only modest variations in elevation — a maximum elevation change of 72 m.

The land around Humaitá is covered by trees (38%) and grassland (31%) within 3 km, trees (69%) and grassland (22%) within 16 km, and trees (93%) within 80 km.

3 km
38 m
16 km
45 m
80 km
72 m
treesgrasslandcroplandartificial surfaceswater
September weather nearby: Candeias do Jamari 161 km · Porto Velho 169 km · Canutama 185 km · Lábrea 197 km · Tapauá 211 km · Machadinho d'Oeste 243 km · Alto Paraíso 247 km · Ariquemes 267 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 Humaitá (-7.5165°, -63.0311°, elevation 54 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).