Juína weather in September

In September, Juína sees average daytime highs of 33°C and overnight lows near 22°C, with 67 mm of rain across 11.1 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 41% 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 Juína's 4th-clearest and 4th-windiest month. For the whole year in context, see Juína's year-round climate.

Daytime high
33°
1st warmest
Overnight low
22°
11th coldest
Rainfall
67 mm
11.1 wet days
Daylight
11 h 54 min
6:51 AM – 6:47 PM
Cloud cover
51%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
5.67 kWh/m²
Travel score
3.5
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 Juína reaches about 33°C in the afternoon and slips back to 22°C overnight — a 11°C spread between the day's warmth and the night's chill. On most days the high lands between 30°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
23322
33322
43322
53322
63322
73322
83322
93322
103322
113322
123322
133322
143322
153322
163322
173322
183322
193322
203322
213322
223322
233322
243322
253322
263322
273222
283222
293222
303222

How September really feels in Juína

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.

Juína 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
Jan29° / 22°30228.912.62.9
Feb29° / 22°28626.912.42.9
Mar29° / 22°26228.712.12.9
Apr30° / 22°1432211.83.6
May30° / 21°5410.511.55.0
Jun30° / 20°112.311.35.9
Jul31° / 19°4111.45.6
Aug33° / 20°122.311.64.4
Sep33° / 22°6711.111.93.5
Oct32° / 22°16421.812.33.0
Nov30° / 22°24926.212.52.9
Dec29° / 22°29128.412.72.9

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 41% 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 37%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17822
27822
37624
47525
57426
67327
77228
87129
97030
106931
116832
126733
136634
146535
156436
166238
176139
186139
196040
205941
215941
225743
235743
245545
255446
265347
275248
285050
295050
304852

Chance of precipitation in September

Any precipitation

Juína gets around 67 mm of rain over 11.1 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 37% and peaks near 58% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%151015202530
Rain chance (%)
118
219
320
421
522
623
724
825
926
1027
1128
1230
1331
1433
1535
1636
1738
1840
1941
2043
2145
2247
2348
2450
2552
2653
2755
2856
2957
3058

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 44% of days. Sticky, muggy-or-worse air turns up on roughly 73% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
1515293516
2514283618
3413273619
4413263621
5413253523
6412253524
7412243426
8411243328
9411233330
10411233131
11310223134
1239213036
1339212938
1438202940
1527202843
1627192845
1726182747
1825172749
1925162651
2014152654
2114142655
2213132657
2313112560
2413102561
251292464
260282466
270272368
280262369
290152272
300142273

Wind in September

Winds average 6 km/h in September.

Across September, daily wind ranges from about 6 km/h on the calmest days to 7 km/h at its breeziest. It stays fairly steady from day to day.

0246810151015202530
Wind speed (km/h)Feels
17calm
27calm
37calm
47calm
57calm
67calm
77calm
87calm
97calm
107calm
117calm
127calm
137calm
147calm
156calm
166calm
176calm
186calm
196calm
206calm
216calm
226calm
236calm
246calm
256calm
266calm
276calm
286calm
296calm
306calm

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 7:01 AM to 6:42 AM, and sunset from 6:48 PM to 6:47 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.87:016:48
211.87:016:48
311.87:006:48
411.86:596:48
511.86:596:48
611.86:586:48
711.86:576:48
811.96:576:48
911.96:566:48
1011.96:556:48
1111.96:556:48
1211.96:546:48
1311.96:536:48
1411.96:536:48
1511.96:526:48
1611.96:516:47
1711.96:516:47
1812.06:506:47
1912.06:496:47
2012.06:486:47
2112.06:486:47
2212.06:476:47
2312.06:466:47
2412.06:466:47
2512.06:456:47
2612.06:446:47
2712.16:446:47
2812.16:436:47
2912.16:426:47
3012.16:426:47

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.67 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.56 kWh/m² to a high of 5.67 kWh/m² in September across the year — September's 5.67 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.6Bright
25.6Bright
35.6Bright
45.6Bright
55.6Bright
65.6Bright
75.7Bright
85.7Bright
95.7Bright
105.7Bright
115.7Bright
125.7Bright
135.7Bright
145.7Bright
155.7Bright
165.7Bright
175.7Bright
185.7Bright
195.7Bright
205.7Bright
215.7Bright
225.7Bright
235.7Bright
245.7Bright
255.7Bright
265.7Bright
275.7Bright
285.7Bright
295.7Bright
305.7Bright
Planning a trip in September

Hazard calendar for Juína

In seasonPeak

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

Juína's monsoon runs October–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 Juína?

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

3.5
Sightseeing
6th-best month of the year
6.2
Beach & pool
5th-best month of the year

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

What to pack for Juína in September

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

In September, Juína sees daytime highs around 33°C and nights near 22°C. Pack light clothes. Worth having: rain gear and sun protection. About 11 days see rain.

light clothesrain gearsun protection

UV index in Juína in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 3 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Juína peaks around January 23 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 15 at about 4 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highModerateExtremeJan 23UV 15Sep 15UV 4
UV index (midday)Level
Jan15Extreme
Feb15Extreme
Mar14Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug9Very high
Sep3Moderate
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Juína 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 Juína is worst in September — around 58 µg/m³ PM2.5 (unhealthy), about 6.8× the cleanest month (July, 9 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1554 µg/m³Apr 219 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar10Good
Apr9Good
May9Good
Jun11Good
Jul9Good
Aug29Moderate
Sep58Unhealthy
Oct23Moderate
Nov16Moderate
Dec12Moderate
Location & terrain

Where is Juína?

Juína sits at 11.4°S, 58.8°W, 353 m above sea level, in Brazil. The nearest listed city is Brasnorte, 113 km away.

Espigão dOestePimenta Bueno

Topography around Juína

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

Within 3 km, the terrain around Juína has only modest variations in elevation — a maximum elevation change of 68 m around an average of 340 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 228 m; within 80 km, significant variations in elevation — a maximum elevation change of 321 m.

The land around Juína is covered by grassland (49%), artificial surfaces (28%) and trees (20%) within 3 km, grassland (63%) and trees (34%) within 16 km, and trees (66%) and grassland (29%) within 80 km.

3 km
68 m
16 km
228 m
80 km
321 m
treesgrasslandcroplandartificial surfaces
September weather nearby: Brasnorte 113 km · Juara 136 km · Aripuanã 158 km · Vilhena 211 km · Colniza 226 km · Sapezal 236 km · Espigão dOeste 246 km · Pimenta Bueno 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 Juína (-11.4205°, -58.7549°, elevation 353 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).