Cruzeiro do Sul weather in September

In September, Cruzeiro do Sul sees average daytime highs of 32°C and overnight lows near 22°C, with 109 mm of rain across 17.1 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 20% of the time in September, and the air most often feels oppressive.

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 Cruzeiro do Sul's 4th-clearest and 3rd-windiest month. For the whole year in context, see Cruzeiro do Sul's year-round climate.

Daytime high
32°
1st warmest
Overnight low
22°
5th coldest
Rainfall
109 mm
17.1 wet days
Daylight
12 hours
5:46 AM – 5:44 PM
Cloud cover
65%
4th clearest
Wind
5 km/h
3rd windiest
Solar energy
5.29 kWh/m²
Travel score
3.2
out of 10

Cruzeiro do Sul is city 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 Cruzeiro do Sul 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 28°C and 35°C. Set against its neighbours, September runs on par with August and on par with October.

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
303223

How September really feels in Cruzeiro do Sul

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.

Cruzeiro do Sul 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
Jan31° / 23°23925.412.42.9
Feb30° / 23°24223.612.32.9
Mar30° / 23°28327.512.12.8
Apr30° / 23°22224.411.83.0
May30° / 22°13420.611.73.7
Jun30° / 21°8115.311.64.4
Jul30° / 21°5611.911.64.7
Aug32° / 21°7112.911.73.9
Sep32° / 22°10917.1123.2
Oct32° / 23°17622.712.22.9
Nov31° / 23°22123.812.32.8
Dec31° / 23°24326.412.42.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 20% 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 58%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
15545
25347
35347
45248
55149
65050
74951
84852
94753
104654
114654
124456
134357
144258
154060
164060
173961
183961
193763
203763
213664
223664
233664
243565
253565
263565
273466
283466
293367
303268

Chance of precipitation in September

Any precipitation

Cruzeiro do Sul gets around 109 mm of rain over 17.1 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 57% 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
251
352
452
552
653
753
853
954
1054
1154
1254
1354
1455
1555
1656
1757
1857
1958
2058
2159
2259
2360
2460
2561
2662
2762
2863
2964
3064

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 89% of days. Sticky, muggy-or-worse air turns up on roughly 98% of them.

0%25%50%75%100%151015202530
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
11312822
21311823
31311823
41310833
51310833
6139843
7139843
8138853
9038863
10037873
11037873
12026893
13026893
14026902
15026902
16025912
17025912
18015922
19015922
20015922
21015922
22015922
23015922
24015922
25015922
26005932
27005932
28005932
29005932
30005932

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 5:55 AM to 5:38 AM, and sunset from 5:46 PM to 5:42 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.95:555:46
211.95:545:46
311.95:545:46
411.95:535:46
511.95:535:45
611.95:525:45
711.95:525:45
811.95:515:45
911.95:505:45
1011.95:505:45
1111.95:495:45
1211.95:495:44
1311.95:485:44
1411.95:475:44
1512.05:475:44
1612.05:465:44
1712.05:465:44
1812.05:455:43
1912.05:455:43
2012.05:445:43
2112.05:435:43
2212.05:435:43
2312.05:425:43
2412.05:425:43
2512.05:415:42
2612.05:405:42
2712.05:405:42
2812.05:395:42
2912.15:395:42
3012.15:385:42

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.29 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.05 kWh/m² to a high of 5.29 kWh/m² in September across the year — September's 5.29 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.2Bright
25.2Bright
35.2Bright
45.2Bright
55.2Bright
65.2Bright
75.3Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.3Bright
145.3Bright
155.3Bright
165.3Bright
175.3Bright
185.3Bright
195.3Bright
205.3Bright
215.3Bright
225.3Bright
235.3Bright
245.3Bright
255.3Bright
265.3Bright
275.3Bright
285.3Bright
295.3Bright
305.3Bright
Planning a trip in September

Is September a good time to visit Cruzeiro do Sul?

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 Cruzeiro do Sul.

What to pack for Cruzeiro do Sul in September

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

In September, Cruzeiro do Sul 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 Cruzeiro do Sul in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Cruzeiro do Sul peaks around February 14 at about 17 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 24 at about 9 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeFeb 14UV 17Jul 24UV 9
UV index (midday)Level
Jan15Extreme
Feb17Extreme
Mar15Extreme
Apr12Extreme
May12Extreme
Jun10Very high
Jul9Very high
Aug9Very high
Sep10Extreme
Oct13Extreme
Nov13Extreme
Dec13Extreme

Air quality in Cruzeiro do Sul 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 Cruzeiro do Sul is worst in September — around 48 µg/m³ PM2.5 (poor), about 6.8× the cleanest month (June, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateGoodSep 1545 µg/m³Jun 117 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb15Moderate
Mar13Moderate
Apr10Good
May8Good
Jun7Good
Jul10Good
Aug26Moderate
Sep48Poor
Oct15Moderate
Nov13Moderate
Dec11Good
Location & terrain

Where is Cruzeiro do Sul?

Cruzeiro do Sul sits at 7.6°S, 72.7°W, 195 m above sea level, in Brazil. The nearest listed city is Mâncio Lima, 24 km away.

ContamanaFeijó

Topography around Cruzeiro do Sul

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

Within 3 km, the terrain around Cruzeiro do Sul has only modest variations in elevation — a maximum elevation change of 65 m around an average of 190 m above sea level; within 16 km, only modest variations in elevation — a maximum elevation change of 103 m; within 80 km, only modest variations in elevation — a maximum elevation change of 146 m.

The land around Cruzeiro do Sul is covered by trees (62%) and artificial surfaces (22%) within 3 km, trees (72%) and grassland (24%) within 16 km, and trees (95%) within 80 km.

3 km
65 m
16 km
103 m
80 km
146 m
treesgrasslandartificial surfacesbare terrainwater
September weather nearby: Mâncio Lima 24 km · Ipixuna 126 km · Marechal Thaumaturgo 147 km · Tarauacá 219 km · San Fernando 222 km · Pucallpa 223 km · Contamana 260 km · Feijó 263 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 Cruzeiro do Sul (-7.6276°, -72.6776°, elevation 195 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).