Colinas do Tocantins weather in September

In September, Colinas do Tocantins sees average daytime highs of 34°C and overnight lows near 22°C, with 25 mm of rain across 4.2 wet days and about 12 hours of daylight. It is the 2nd-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 34°C through the month. The sky is clear or mostly clear about 59% of the time in September, and the air most often feels muggy.

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 Colinas do Tocantins's 4th-clearest and 4th-windiest month. For the whole year in context, see Colinas do Tocantins's year-round climate.

Daytime high
34°
2nd warmest
Overnight low
22°
10th coldest
Rainfall
25 mm
4.2 wet days
Daylight
12 hours
6:10 AM – 6:07 PM
Cloud cover
40%
4th clearest
Wind
8 km/h
4th windiest
Solar energy
6.22 kWh/m²
Travel score
3.4
out of 10

Temperature in September

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 34°C through the month.

A typical September day in Colinas do Tocantins reaches about 34°C in the afternoon and slips back to 22°C overnight — a 12°C spread between the day's warmth and the night's chill. On most days the high lands between 32°C and 36°C. Set against its neighbours, September runs on par with August and about 2°C warmer than October.

20°25°30°35°40°151015202530
Avg high (°C)Avg low (°C)
13522
23522
33522
43522
53522
63522
73522
83522
93522
103522
113522
123522
133522
143522
153422
163423
173423
183423
193423
203423
213423
223423
233423
243423
253423
263423
273423
283423
293323
303323

How September really feels in Colinas do Tocantins

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 do Tocantins weather by month

How September compares with the rest of the year at a glance. September is the 2nd-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysDaylight (hours)Travel score
Jan30° / 22°28427.612.42.9
Feb30° / 22°26625.812.32.8
Mar30° / 22°27127.112.12.9
Apr31° / 22°18021.511.83.3
May31° / 22°7910.411.64.2
Jun32° / 22°40.911.54.8
Jul33° / 21°20.311.64.5
Aug34° / 21°30.511.73.7
Sep34° / 22°254.2123.4
Oct32° / 23°10514.612.23.4
Nov31° / 23°1972112.43.2
Dec30° / 22°2352512.53.1

Cloud cover in September

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 59% of the time in September.

Beyond those clear spells, partly cloudy skies cover about 17% of September, with mostly cloudy or overcast conditions the remaining 24%. Skies tend to cloud over as the month goes on.

0%25%50%75%100%151015202530
Clearer (%)Cloudier (%)
18416
28416
38416
48317
58317
68218
78218
88218
98119
108119
118119
128020
137921
147921
157822
167723
177624
187525
197426
207327
217228
227129
237030
246931
256832
266733
276733
286535
296535
306436

Chance of precipitation in September

Any precipitation

Colinas do Tocantins gets around 25 mm of rain over 4.2 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 14% and peaks near 31% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%151015202530
Rain chance (%)
15
25
36
46
57
67
77
88
98
108
119
129
1310
1411
1511
1612
1713
1814
1915
2016
2118
2219
2321
2422
2524
2625
2727
2828
2929
3031

Humidity in September

DryComfortableHumidMuggyOppressiveMiserable

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

By dew point, September lands in the muggy band about 35% of days. Sticky, muggy-or-worse air turns up on roughly 58% of them.

0%25%50%75%100%151015202530
Dry (%)Comfortable (%)Humid (%)Muggy (%)Oppressive (%)
142934277
242833287
342832288
442831299
542830299
6427293010
7427293110
8427283111
9326273212
10325273312
11324263313
12323253414
13322253515
14321243516
15320243617
16319233719
17317223820
18216213922
19214204024
20213194026
21212184128
22210164131
2319154133
2418144136
2517134039
2616124041
2715114044
2805103946
290493848
300383851

Wind in September

Winds average 8 km/h in September.

Across September, daily wind ranges from about 7 km/h on the calmest days to 8 km/h at its breeziest. It stays fairly steady from day to day.

051015151015202530
Wind speed (km/h)Feels
18calm
28calm
38calm
48calm
58calm
68calm
78calm
88calm
98calm
108calm
118calm
128calm
138calm
148calm
158calm
168calm
178calm
188calm
197calm
207calm
217calm
227calm
237calm
247calm
257calm
267calm
277calm
287calm
297calm
307calm

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 6:18 AM to 6:01 AM, and sunset from 6:09 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202530
Daylight (h)Sunrise (AM)Sunset (PM)
111.86:186:09
211.96:186:09
311.96:176:09
411.96:176:09
511.96:166:08
611.96:156:08
711.96:156:08
811.96:146:08
911.96:146:08
1011.96:136:08
1111.96:136:08
1211.96:126:07
1311.96:116:07
1411.96:116:07
1511.96:106:07
1612.06:106:07
1712.06:096:07
1812.06:086:07
1912.06:086:06
2012.06:076:06
2112.06:076:06
2212.06:066:06
2312.06:056:06
2412.06:056:06
2512.06:046:06
2612.06:046:06
2712.06:036:05
2812.06:026:05
2912.16:026:05
3012.16:016:05

Solar energy in September

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in September, about 6.22 kWh/m² — the sunniest month for solar.

For context, solar energy here swings from a low near 4.77 kWh/m² to a high of 6.22 kWh/m² in September across the year — September's 6.22 kWh/m² sits near the top of that range.

0246151015202530
Solar energy (kWh/m²)Level
16.2Intense
26.2Intense
36.2Intense
46.2Intense
56.2Intense
66.2Intense
76.2Intense
86.2Intense
96.3Intense
106.3Intense
116.3Intense
126.3Intense
136.3Intense
146.3Intense
156.3Intense
166.3Intense
176.3Intense
186.3Intense
196.2Intense
206.2Intense
216.2Intense
226.2Intense
236.2Intense
246.2Intense
256.2Intense
266.2Intense
276.2Intense
286.1Intense
296.1Intense
306.1Intense
Planning a trip in September

Hazard calendar for Colinas do Tocantins

In seasonPeak

None of Colinas do Tocantins'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 do Tocantins's monsoon runs November–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 do Tocantins?

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

3.4
Sightseeing
5th-best month of the year
6.8
Beach & pool
4th-best month of the year

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

What to pack for Colinas do Tocantins in September

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

In September, Colinas do Tocantins sees daytime highs around 34°C and nights near 22°C. Pack light clothes and sun protection. About 4 days see rain.

light clothessun protection

UV index in Colinas do Tocantins 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 do Tocantins peaks around March 10 at about 15 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near June 22 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 10UV 15Jun 22UV 10
UV index (midday)Level
Jan14Extreme
Feb15Extreme
Mar15Extreme
Apr13Extreme
May11Extreme
Jun10Very high
Jul10Very high
Aug11Extreme
Sep12Extreme
Oct11Extreme
Nov12Extreme
Dec11Extreme

Air quality in Colinas do Tocantins 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 do Tocantins is worst in September — around 47 µg/m³ PM2.5 (poor), about 7.0× the cleanest month (June, 7 µg/m³).

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

0204060JanFebMarAprMayJunJulAugSepOctNovDecGoodModeratePoorModerateSep 1845 µg/m³Jun 237 µg/m³
PM2.5 (µg/m³)Level
Jan12Good
Feb11Good
Mar12Good
Apr11Good
May9Good
Jun7Good
Jul7Good
Aug21Moderate
Sep47Poor
Oct30Moderate
Nov18Moderate
Dec15Moderate
Location & terrain

Where is Colinas do Tocantins?

Colinas do Tocantins sits at 8.1°S, 48.5°W, 230 m above sea level, in Brazil. The nearest listed city is Guaraí, 86 km away.

Topography around Colinas do Tocantins

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

Within 3 km, the terrain around Colinas do Tocantins has only modest variations in elevation — a maximum elevation change of 77 m around an average of 216 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 371 m; within 80 km, significant variations in elevation — a maximum elevation change of 569 m.

The land around Colinas do Tocantins is covered by grassland (51%), artificial surfaces (24%) and trees (22%) within 3 km, grassland (71%) and trees (25%) within 16 km, and grassland (64%) and trees (32%) within 80 km.

3 km
77 m
16 km
371 m
80 km
569 m
treesshrubsgrasslandcroplandartificial surfacesbare terrainwater
September weather nearby: Guaraí 86 km · Conceição do Araguaia 90 km · Araguaína 101 km · Carolina 138 km · Floresta do Araguaia 147 km · Santa Maria das Barreiras 163 km · Miracema do Tocantins 168 km · Redenção 171 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 do Tocantins (-8.0592°, -48.475°, elevation 230 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).