Lábrea weather in September

In September, Lábrea sees average daytime highs of 32°C and overnight lows near 24°C, with 116 mm of rain across 18.4 wet days and about 12 hours of daylight. It is the 1st-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 22% 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 Lábrea's 4th-clearest and 3rd-windiest month. For the whole year in context, see Lábrea's year-round climate.

Daytime high
32°
1st warmest
Overnight low
24°
9th coldest
Rainfall
116 mm
18.4 wet days
Daylight
12 hours
6:15 AM – 6:12 PM
Cloud cover
63%
4th clearest
Wind
5 km/h
3rd windiest
Solar energy
5.44 kWh/m²
Travel score
3.1
out of 10

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 Lábrea reaches about 32°C in the afternoon and slips back to 24°C overnight — a 9°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 34°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)
13223
23223
33223
43223
53223
63223
73223
83223
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 Lábrea

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
9 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.

Lábrea weather by month

How September compares with the rest of the year at a glance. September is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 24°2992912.42.6
Feb30° / 24°28625.912.22.6
Mar30° / 24°31829.5122.6
Apr30° / 23°25127.111.82.7
May30° / 23°17424.711.73.2
Jun30° / 23°7415.111.64.3
Jul31° / 22°418.411.65.0
Aug32° / 23°6711.311.84.0
Sep32° / 24°11618.4123.1
Oct32° / 24°18323.412.22.8
Nov31° / 24°22226.412.32.6
Dec30° / 24°29428.612.42.6

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 22% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 24% of September, with mostly cloudy or overcast conditions the remaining 54%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
16139
25941
35941
45743
55644
65644
75446
85347
95149
105149
114951
124951
134852
144753
154654
164555
174456
184456
194357
204258
214159
224060
233961
243862
253862
263763
273664
283466
293466
303367

Chance of precipitation in September

Any precipitation

Lábrea gets around 116 mm of rain over 18.4 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 61% and peaks near 65% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
154
254
355
456
556
657
758
858
959
1059
1159
1260
1360
1460
1561
1661
1762
1862
1962
2063
2163
2263
2364
2464
2564
2664
2765
2865
2965
3065

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 57% of days. Sticky, muggy-or-worse air turns up on roughly 99% of them.

0%25%50%75%100%151015202530
Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1344647
2244647
3244648
4244648
5244649
6244649
7144550
8134551
9134551
10134452
11134452
12134353
13134254
14134155
15034057
16033958
17023959
18023860
19023761
20023662
21023662
22013564
23013564
24013465
25013465
26013465
27013366
28013366
29013366
30013366

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 6:23 AM to 6:07 AM, and sunset from 6:15 PM to 6:10 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:236:15
211.96:236:15
311.96:226:14
411.96:216:14
511.96:216:14
611.96:206:14
711.96:206:14
811.96:196:14
911.96:196:13
1011.96:186:13
1111.96:186:13
1211.96:176:13
1311.96:166:13
1411.96:166:13
1512.06:156:12
1612.06:156:12
1712.06:146:12
1812.06:146:12
1912.06:136:12
2012.06:126:12
2112.06:126:12
2212.06:116:11
2312.06:116:11
2412.06:106:11
2512.06:106:11
2612.06:096:11
2712.06:086:11
2812.06:086:10
2912.06:076:10
3012.16:076:10

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.44 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.01 kWh/m² to a high of 5.44 kWh/m² in September across the year — September's 5.44 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.3Bright
25.3Bright
35.3Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.4Bright
95.4Bright
105.4Bright
115.4Bright
125.4Bright
135.4Bright
145.4Bright
155.5Bright
165.5Bright
175.5Bright
185.5Bright
195.5Bright
205.5Bright
215.5Bright
225.5Bright
235.5Bright
245.5Bright
255.5Bright
265.5Bright
275.5Bright
285.5Bright
295.5Bright
305.5Bright
Planning a trip in September

Hazard calendar for Lábrea

In seasonPeak

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

Lábrea'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 Lábrea?

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

3.1
Sightseeing
5th-best month of the year
5.1
Beach & pool
4th-best month of the year

September is a weaker month for outdoor sightseeing in Lábrea.

What to pack for Lábrea in September

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

In September, Lábrea 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 Lábrea 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 Lábrea peaks around March 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 24 at about 5 (high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeMar 12UV 15Aug 24UV 5
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul9Very high
Aug5High
Sep5High
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Lábrea 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 Lábrea is worst in August — around 57 µg/m³ PM2.5 (unhealthy), about 5.6× the cleanest month (June, 10 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModerateUnhealthyModerateAug 2357 µg/m³Jun 910 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb14Moderate
Mar14Moderate
Apr12Good
May10Good
Jun10Good
Jul16Moderate
Aug57Unhealthy
Sep55Poor
Oct21Moderate
Nov16Moderate
Dec15Moderate
Location & terrain

Where is Lábrea?

Lábrea sits at 7.3°S, 64.8°W, 65 m above sea level, in Brazil. The nearest listed city is Canutama, 93 km away.

TapauáAlto ParaísoBoca do Acre

Topography around Lábrea

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

Within 3 km, the terrain around Lábrea has only modest variations in elevation — a maximum elevation change of 37 m around an average of 64 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 51 m; within 80 km, only modest variations in elevation — a maximum elevation change of 83 m.

The land around Lábrea is covered by trees (57%) and grassland (28%) within 3 km, trees (88%) within 16 km, and trees (98%) within 80 km.

3 km
37 m
16 km
51 m
80 km
83 m
treesgrasslandartificial surfaceswater
September weather nearby: Canutama 93 km · Porto Velho 193 km · Humaitá 197 km · Candeias do Jamari 210 km · Pauini 245 km · Tapauá 255 km · Alto Paraíso 318 km · Boca do Acre 331 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 Lábrea (-7.2644°, -64.7964°, elevation 65 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).