Feijó weather in September

In September, Feijó sees average daytime highs of 32°C and overnight lows near 22°C, with 125 mm of rain across 17.2 wet days and about 12 hours of daylight. It is the 1st-warmest and 8th-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 19% of the time in September, and the air most often feels oppressive.

Daylight stretches from about 11 h 48 min at the start of September to 12 h 06 min by month's end. Set against the rest of the year, September is Feijó's 4th-clearest and 2nd-windiest month. For the whole year in context, see Feijó's year-round climate.

Daytime high
32°
1st warmest
Overnight low
22°
5th coldest
Rainfall
125 mm
17.2 wet days
Daylight
12 hours
5:37 AM – 5:34 PM
Cloud cover
64%
4th clearest
Wind
5 km/h
2nd windiest
Solar energy
5.44 kWh/m²
Travel score
3.2
out of 10

Feijó is human 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 Feijó reaches about 32°C in the afternoon and slips back to 22°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 29°C and 35°C. Set against its neighbours, September runs on par with August and on par with October.

15°20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13222
23222
33222
43222
53222
63222
73222
83222
93222
103222
113222
123222
133222
143222
153222
163222
173222
183222
193222
203222
213222
223222
233222
243222
253222
263222
273222
283222
293222
303222

How September really feels in Feijó

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.

Feijó 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° / 23°26227.912.42.8
Feb30° / 23°25725.212.32.8
Mar30° / 23°29028.312.12.8
Apr30° / 22°20324.111.83.1
May30° / 22°12320.311.63.8
Jun30° / 21°711411.54.7
Jul30° / 20°4910.611.64.8
Aug32° / 21°6911.111.73.9
Sep32° / 22°12517.2123.2
Oct32° / 23°1832312.22.8
Nov31° / 23°23524.912.42.8
Dec30° / 23°26427.612.52.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 19% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 25% of September, with mostly cloudy or overcast conditions the remaining 55%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15941
25842
35743
45644
55446
65446
75248
85149
95050
104951
114852
124753
134654
144555
154555
164258
174258
184159
194060
204060
214060
223961
233862
243862
253664
263664
273664
283466
293466
303367

Chance of precipitation in September

Any precipitation

Feijó gets around 125 mm of rain over 17.2 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 57% and peaks near 66% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
150
251
352
452
553
653
754
854
955
1055
1156
1256
1356
1456
1557
1657
1757
1858
1958
2058
2159
2259
2360
2461
2561
2662
2763
2864
2965
3066

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the oppressive band about 83% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
112313792
212313792
312312802
412312802
512311803
612311803
711211823
811210824
911210824
1011210815
110129835
120129826
130129826
140129826
150129826
160129826
170128827
180128827
190128827
200128827
210028837
220028837
230017857
240017857
250017857
260016867
270016867
280015868
290015868
300015868

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

0246810151015202530
Wind speed (km/h)Feels
16calm
26calm
36calm
46calm
56calm
66calm
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 48 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 18 minutes over September. Sunrise moves from 5:46 AM to 5:29 AM, and sunset from 5:36 PM to 5:33 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.85:465:36
211.85:455:36
311.95:455:36
411.95:445:36
511.95:445:36
611.95:435:36
711.95:425:36
811.95:425:36
911.95:415:35
1011.95:415:35
1111.95:405:35
1211.95:395:35
1311.95:395:35
1411.95:385:35
1511.95:385:35
1612.05:375:34
1712.05:365:34
1812.05:365:34
1912.05:355:34
2012.05:355:34
2112.05:345:34
2212.05:335:34
2312.05:335:33
2412.05:325:33
2512.05:325:33
2612.05:315:33
2712.05:315:33
2812.05:305:33
2912.15:295:33
3012.15:295:33

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 4.19 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
15.4Bright
25.4Bright
35.4Bright
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 Feijó

In seasonPeak

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

Feijó's rainy season runs October–April, 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 Feijó?

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 Feijó.

What to pack for Feijó in September

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

In September, Feijó sees daytime highs around 32°C and nights near 22°C. Pack light clothes and rain gear. Worth having: sun protection. About 17 days see rain.

light clothesrain gearsun protection

UV index in Feijó in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 8 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Feijó peaks around February 12 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near August 24 at about 8 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 12UV 15Aug 24UV 8
UV index (midday)Level
Jan15Extreme
Feb16Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun9Very high
Jul9Very high
Aug8Very high
Sep8Very high
Oct13Extreme
Nov13Extreme
Dec12Extreme

Air quality in Feijó 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 Feijó is worst in September — around 80 µg/m³ PM2.5 (unhealthy), about 11.8× the cleanest month (June, 7 µg/m³).

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

020406080JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateGoodUnhealthyModerateGoodSep 1276 µg/m³Jun 117 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb13Moderate
Mar12Moderate
Apr10Good
May8Good
Jun7Good
Jul10Good
Aug57Unhealthy
Sep80Unhealthy
Oct15Moderate
Nov12Good
Dec10Good
Location & terrain

Where is Feijó?

Feijó sits at 8.2°S, 70.4°W, 160 m above sea level, in Brazil. The nearest listed city is Tarauacá, 45 km away.

Cruzeiro do SulMarechal ThaumaturgoMâncio LimaBoca do Acre

Topography around Feijó

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

Within 3 km, the terrain around Feijó has only modest variations in elevation — a maximum elevation change of 38 m around an average of 164 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 119 m; within 80 km, only modest variations in elevation — a maximum elevation change of 188 m.

The land around Feijó is covered by grassland (50%) and trees (37%) within 3 km, trees (69%) and grassland (30%) within 16 km, and trees (93%) within 80 km.

3 km
38 m
16 km
119 m
80 km
188 m
treesgrasslandartificial surfaceswater
September weather nearby: Tarauacá 45 km · Eirunepé 176 km · Ipixuna 193 km · Sena Madureira 210 km · Cruzeiro do Sul 263 km · Marechal Thaumaturgo 281 km · Mâncio Lima 286 km · Boca do Acre 332 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 Feijó (-8.1654°, -70.3549°, elevation 160 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).