Colniza weather in September

In September, Colniza sees average daytime highs of 33°C and overnight lows near 24°C, with 101 mm of rain across 14.9 wet days and about 11.9 hours of daylight. It is the 3rd-warmest and 8th-wettest month of the year here.

Highs ease over the month, from about 34°C in the first days to 32°C by the end. The sky is clear or mostly clear about 31% 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 Colniza's 4th-clearest and 4th-windiest month. For the whole year in context, see Colniza's year-round climate.

Daytime high
33°
3rd warmest
Overnight low
24°
12th coldest
Rainfall
101 mm
14.9 wet days
Daylight
11 h 54 min
6:52 AM – 6:49 PM
Cloud cover
57%
4th clearest
Wind
6 km/h
4th windiest
Solar energy
5.57 kWh/m²
Travel score
3.0
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Highs ease over the month, from about 34°C in the first days to 32°C by the end.

A typical September day in Colniza reaches about 33°C in the afternoon and slips back to 24°C overnight — a 10°C spread between the day's warmth and the night's chill. On most days the high lands between 30°C and 37°C. Set against its neighbours, September runs about 1°C cooler than August and about 2°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13424
23424
33424
43424
53424
63424
73424
83424
93424
103424
113424
123424
133424
143324
153324
163324
173324
183324
193324
203324
213324
223324
233324
243324
253324
263324
273224
283224
293223
303223

How September really feels in Colniza

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.

Colniza weather by month

How September compares with the rest of the year at a glance. September is the 3rd-warmest and 8th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan29° / 23°3233012.52.8
Feb29° / 23°30927.112.32.7
Mar30° / 23°30129.512.12.7
Apr30° / 23°22026.211.83.0
May30° / 22°8816.511.64.1
Jun32° / 22°17411.55.0
Jul33° / 22°91.911.54.3
Aug35° / 23°25411.73.2
Sep33° / 24°10114.911.93.0
Oct32° / 23°20424.812.22.8
Nov30° / 23°24826.712.42.7
Dec30° / 23°30529.112.52.8

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 31% 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 45%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
17228
27129
37030
46931
56733
66733
76535
86535
96337
106238
116139
125941
135842
145644
155545
165446
175347
185248
195050
205050
214852
224753
234654
244456
254456
264357
274258
284258
294060
303961

Chance of precipitation in September

Any precipitation

Colniza gets around 101 mm of rain over 14.9 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 49% and peaks near 70% on the wettest days. The odds climb toward the end of the month.

0%20%40%60%80%151015202530
Rain chance (%)
128
229
330
431
533
634
735
836
937
1039
1140
1242
1344
1445
1547
1649
1751
1853
1955
2057
2159
2261
2363
2464
2566
2667
2768
2869
2970
3070

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 62% of days. Sticky, muggy-or-worse air turns up on roughly 87% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
1591532390
2481432410
3481433420
4371433430
5371333440
6371332450
7261232470
8261232480
9261131500
10261130510
11251029540
12151028560
1315927580
1415926590
1514825620
1614824630
1704723660
1803722680
1903621691
2002520721
2102519731
2202418751
2302417761
2401416781
2501315801
2601314811
2701313812
2801212832
2900212842
3000211852

Wind in September

Winds average 6 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
76calm
86calm
96calm
106calm
116calm
126calm
136calm
146calm
156calm
166calm
176calm
186calm
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 7:01 AM to 6:43 AM, and sunset from 6:50 PM to 6:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.87:016:50
211.87:016:50
311.87:006:50
411.86:596:50
511.96:596:50
611.96:586:50
711.96:586:50
811.96:576:50
911.96:566:50
1011.96:566:50
1111.96:556:49
1211.96:556:49
1311.96:546:49
1411.96:536:49
1511.96:536:49
1611.96:526:49
1712.06:516:49
1812.06:516:49
1912.06:506:49
2012.06:496:48
2112.06:496:48
2212.06:486:48
2312.06:486:48
2412.06:476:48
2512.06:466:48
2612.06:466:48
2712.06:456:48
2812.16:446:48
2912.16:446:48
3012.16:436:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 5.57 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.49 kWh/m² to a high of 5.57 kWh/m² in September across the year — September's 5.57 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
15.5Bright
25.5Bright
35.5Bright
45.5Bright
55.5Bright
65.5Bright
75.6Bright
85.6Bright
95.6Bright
105.6Bright
115.6Bright
125.6Bright
135.6Bright
145.6Bright
155.6Bright
165.6Bright
175.6Bright
185.6Bright
195.6Bright
205.6Bright
215.6Bright
225.6Bright
235.6Bright
245.6Bright
255.6Bright
265.6Bright
275.6Bright
285.6Bright
295.6Bright
305.6Bright
Planning a trip in September

Hazard calendar for Colniza

In seasonPeak

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

Colniza'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 Colniza?

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

3.0
Sightseeing
5th-best month of the year
5.5
Beach & pool
5th-best month of the year

September is a weaker month for outdoor sightseeing in Colniza.

What to pack for Colniza in September

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

In September, Colniza sees daytime highs around 33°C and nights near 24°C. Pack light clothes and rain gear. Worth having: sun protection. About 15 days see rain.

light clothesrain gearsun protection

UV index in Colniza in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 4 — enough to warrant sun protection. The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Colniza peaks around February 17 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near September 14 at about 5 (moderate).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highHighExtremeFeb 17UV 15Sep 14UV 5
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May10Very high
Jun9Very high
Jul9Very high
Aug8Very high
Sep4Moderate
Oct11Extreme
Nov13Extreme
Dec13Extreme

Air quality in Colniza 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 Colniza is worst in September — around 124 µg/m³ PM2.5 (unhealthy), about 16.6× the cleanest month (July, 8 µg/m³).

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

0306090120JanFebMarAprMayJunJulAugSepOctNovDecGoodModerateUnhealthyModerateSep 14115 µg/m³Jul 98 µg/m³
PM2.5 (µg/m³)Level
Jan10Good
Feb10Good
Mar10Good
Apr9Good
May8Good
Jun8Good
Jul8Good
Aug62Unhealthy
Sep124Unhealthy
Oct30Moderate
Nov17Moderate
Dec13Moderate
Location & terrain

Where is Colniza?

Colniza sits at 9.4°S, 59.0°W, 142 m above sea level, in Brazil. The nearest listed city is Aripuanã, 97 km away.

JuaraApuíEspigão dOesteBrasnorteMachadinho d'OestePimenta Bueno

Topography around Colniza

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

Within 3 km, the terrain around Colniza has only modest variations in elevation — a maximum elevation change of 125 m around an average of 158 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 294 m; within 80 km, significant variations in elevation — a maximum elevation change of 341 m.

The land around Colniza is covered by grassland (68%) and trees (32%) within 3 km, grassland (66%) and trees (34%) within 16 km, and trees (80%) and grassland (20%) within 80 km.

3 km
125 m
16 km
294 m
80 km
341 m
treesgrasslandwater
September weather nearby: Aripuanã 97 km · Juína 226 km · Juara 263 km · Apuí 264 km · Espigão dOeste 320 km · Brasnorte 321 km · Machadinho d'Oeste 324 km · Pimenta Bueno 346 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 Colniza (-9.4092°, -59.025°, elevation 142 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).