Colinas weather in September

In September, Colinas sees average daytime highs of 35°C and overnight lows near 23°C, with 9 mm of rain across 1.5 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 35°C through the month. The sky is clear or mostly clear about 67% of the time in September, and the air most often feels humid.

Daylight stretches from about 11 h 54 min at the start of September to 12 hours by month's end. Set against the rest of the year, September is Colinas's 2nd-clearest and 4th-windiest month. For the whole year in context, see Colinas's year-round climate.

Daytime high
35°
1st warmest
Overnight low
23°
10th coldest
Rainfall
9 mm
1.5 wet days
Daylight
12 hours
5:52 AM – 5:50 PM
Cloud cover
33%
2nd clearest
Wind
9 km/h
4th windiest
Solar energy
6.47 kWh/m²
Travel score
3.0
out of 10

Colinas 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 35°C through the month.

A typical September day in Colinas reaches about 35°C in the afternoon and slips back to 23°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 34°C and 37°C. Set against its neighbours, September runs about 1°C warmer than August and on par with October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13523
23523
33523
43523
53523
63523
73523
83523
93523
103523
113523
123523
133523
143523
153523
163523
173523
183523
193523
203523
213523
223523
233523
243523
253523
263523
273523
283523
293523
303523

How September really feels in Colinas

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.

Colinas 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° / 22°22625.112.33.0
Feb30° / 22°21624.112.22.9
Mar30° / 22°23227.1122.9
Apr31° / 22°16921.211.93.3
May31° / 22°7110.311.74.2
Jun32° / 22°81.611.74.8
Jul33° / 22°50.611.74.6
Aug34° / 22°10.111.83.9
Sep35° / 23°91.5123.0
Oct35° / 23°314.712.13.0
Nov33° / 23°8411.812.33.2
Dec32° / 23°13217.212.33.3

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 67% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 21% of September, with mostly cloudy or overcast conditions the remaining 12%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
19010
28911
38911
48911
58911
68812
78812
88812
98812
108812
118911
128911
138812
148812
158812
168812
178812
188911
198812
208812
218812
228812
238713
248713
258713
268614
278614
288515
298416
308317

Chance of precipitation in September

Any precipitation

Colinas gets around 9 mm of rain over 1.5 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 5% and peaks near 10% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%151015202530
Rain chance (%)
12
22
32
43
53
63
73
83
93
103
113
123
133
143
154
164
174
184
195
205
216
226
237
247
258
269
279
2810
2910
3010

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the humid band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 36% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
112550195
212549195
312549195
412649185
512649186
612550186
712550186
812550186
912451186
1012450196
1112350206
1212350216
1312249226
1412149236
1512048256
1611947266
1711847287
1811746307
1901645327
2001543338
2101442359
2201340379
23012393810
24012383911
25011374012
26010364113
2709354114
2809354115
2908344116
3008344117

Wind in September

Winds average 9 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 9 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
19calm
29calm
39calm
49calm
59calm
69calm
79calm
89calm
99calm
109calm
119calm
129calm
139calm
149calm
159calm
169calm
179calm
188calm
198calm
208calm
218calm
228calm
238calm
248calm
258calm
268calm
278calm
287calm
297calm
307calm

Sunrise & sunset in September

DaylightNight

Daylight runs from about 11 h 54 min at the start of September to 12 hours by month's end. The lit band spans sunrise to sunset each day.

Days grow by about 6 minutes over September. Sunrise moves from 6:00 AM to 5:45 AM, and sunset from 5:53 PM to 5:48 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.96:005:53
211.96:005:53
311.95:595:53
411.95:595:53
511.95:585:53
611.95:585:52
711.95:575:52
811.95:575:52
911.95:565:52
1011.95:565:52
1111.95:555:51
1211.95:545:51
1312.05:545:51
1412.05:535:51
1512.05:535:51
1612.05:525:50
1712.05:525:50
1812.05:515:50
1912.05:515:50
2012.05:505:50
2112.05:505:49
2212.05:495:49
2312.05:495:49
2412.05:485:49
2512.05:475:49
2612.05:475:48
2712.05:465:48
2812.05:465:48
2912.05:455:48
3012.05:455:48

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.47 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.45 kWh/m² to a high of 6.47 kWh/m² in September across the year — September's 6.47 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.4Intense
26.4Intense
36.4Intense
46.4Intense
56.4Intense
66.4Intense
76.4Intense
86.4Intense
96.5Intense
106.5Intense
116.5Intense
126.5Intense
136.5Intense
146.5Intense
156.5Intense
166.5Intense
176.5Intense
186.5Intense
196.5Intense
206.5Intense
216.5Intense
226.5Intense
236.5Intense
246.5Intense
256.5Intense
266.5Intense
276.5Intense
286.5Intense
296.5Intense
306.4Intense
Planning a trip in September

Hazard calendar for Colinas

In seasonPeak

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

Colinas's monsoon runs December–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 Colinas?

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

3.0
Sightseeing
8th-best month of the year
6.7
Beach & pool
4th-best month of the year

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

What to pack for Colinas in September

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

In September, Colinas sees daytime highs around 35°C and nights near 23°C. Pack light clothes and sun protection.

light clothessun protection

UV index in Colinas in September

LowModerateHighVery highExtreme

Clear-sky midday UV in September peaks around 12 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Colinas peaks around March 11 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near July 14 at about 10 (very high).

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

025710JanFebMarAprMayJunJulAugSepOctNovDecExtremeVery highExtremeMar 11UV 15Jul 14UV 10
UV index (midday)Level
Jan13Extreme
Feb15Extreme
Mar15Extreme
Apr14Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug10Extreme
Sep12Extreme
Oct12Extreme
Nov12Extreme
Dec11Extreme

Air quality in Colinas 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 Colinas is worst in October — around 53 µg/m³ PM2.5 (poor), about 8.4× the cleanest month (June, 6 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecModerateGoodModeratePoorModerateOct 953 µg/m³Jun 167 µg/m³
PM2.5 (µg/m³)Level
Jan13Moderate
Feb13Moderate
Mar12Good
Apr11Good
May8Good
Jun6Good
Jul8Good
Aug25Moderate
Sep53Poor
Oct53Poor
Nov23Moderate
Dec17Moderate
Location & terrain

Where is Colinas?

Colinas sits at 6.0°S, 44.2°W, 142 m above sea level, in Brazil. The nearest listed city is Fortuna, 34 km away.

Topography around Colinas

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

Within 3 km, the terrain around Colinas has only modest variations in elevation — a maximum elevation change of 96 m around an average of 167 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 319 m; within 80 km, significant variations in elevation — a maximum elevation change of 418 m.

The land around Colinas is covered by trees (69%) within 3 km, trees (85%) within 16 km, and trees (71%) and grassland (21%) within 80 km.

3 km
96 m
16 km
319 m
80 km
418 m
treesshrubsgrasslandcroplandartificial surfaces
September weather nearby: Fortuna 34 km · Mirador 40 km · Buriti Bravo 51 km · São Domingos do Maranhão 52 km · Paraibano 54 km · Passagem Franca 54 km · Pastos Bons 67 km · São João dos Patos 80 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 Colinas (-6.0258°, -44.2492°, 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).